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Hamilton Sundstrand Corporation patents (2015 archive)


Recent patent applications related to Hamilton Sundstrand Corporation. Hamilton Sundstrand Corporation is listed as an Agent/Assignee. Note: Hamilton Sundstrand Corporation may have other listings under different names/spellings. We're not affiliated with Hamilton Sundstrand Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "H" | Hamilton Sundstrand Corporation-related inventors


12/31/15 / #20150375868

Fuel and thermal management system

A system for fuel and thermal management of fuel delivered to an engine is disclosed. The system includes a supply of fuel in fluid communication with a fuel inlet of the engine, and an oxygen sensor for measuring dissolved oxygen content in the fuel is in fluid communication with the fuel. ... Hamilton Sundstrand Corporation

12/24/15 / #20150370274

Power delivery system with mitigation for radiation induced single event latch-up in microelectronic devices

A power delivery system includes a programmable current limit switch circuit connected between a power supply and electronic control circuits that are susceptible to single event latch-up. The programmable current limit switch is connected in a power bus between the power supply and the electronic control circuits. ... Hamilton Sundstrand Corporation

12/17/15 / #20150365099

Multiplexed signal sampler and conditioner

A signal convertor includes a first sensor configured to generate a first signal and a second signal and first and second multiplexers configured receive the first and second signals, respectively, and generate samples. The signal convertor also includes an analog-to-digital (a/d) convertor configured to convert the samples and a processor configured to multiply the samples by a sine vector and by a cosine vector and determine a magnitude of the first and second signals based upon the product of the samples and the sine vector and the product of the samples and the cosine vector. ... Hamilton Sundstrand Corporation

12/17/15 / #20150364922

Solid stte power controller with parallel mosfet load sharing

A solid state power control (sspc) controls flow of current from a power bus to an inductive load. The sspc utilizes load sharing, in which a plurality of current supply paths are connected in parallel to control and share the flow of current between the power bus and the inductive load. ... Hamilton Sundstrand Corporation

12/17/15 / #20150363329

Memory address translation

In one example, a device includes at least one processor, a transceiver configured to send and receive data, and at least one memory device. The at least one memory device includes a range of physical memory addresses divided into a plurality of physical memory partitions that each includes a sub-range of the range of physical memory addresses and corresponds to a range of virtual memory addresses. ... Hamilton Sundstrand Corporation

12/17/15 / #20150360292

Method for making an integrally bladed rotor with hollow blades

A method of making an integrally bladed rotor with hollow blades. A plurality of segmented layers are sequentially placed to form each one of a plurality of blades on a radially outward surface of a hub. ... Hamilton Sundstrand Corporation

12/17/15 / #20150360153

Wash-flow filter assembly

A wash-flow filter assembly is provided. The filter assembly includes a filtering device that includes a tube. ... Hamilton Sundstrand Corporation

12/10/15 / #20150357930

Systems and methods for controlling active rectifiers

A method of controlling a rectifier includes receiving a gain factor, receiving a ramp interval, and generating a rectifier switch control voltage. The rectifier switch control voltage is an over-modulated rectifier switch control voltage generated by a pulse width modulator using the gain factor. ... Hamilton Sundstrand Corporation

12/10/15 / #20150357800

Three-dimensional power distribution interconnect structure

An electrical power distribution system for a mobile platform, and a method for making such, includes a forming a substrate having a first panel connected to a second panel. The first panel resides in a first plane that differs from a second plan in which the second panel resides. ... Hamilton Sundstrand Corporation

12/10/15 / #20150357144

Fuse assembly

A fuse assembly of a motor controller is provided. The fuse assembly includes a base, a base plate to which the base is attached, a lead frame that is attached to the base, at least one lead that is attached to the lead frame, and a fuse element attached to the base and covered with a fusible material. ... Hamilton Sundstrand Corporation

12/10/15 / #20150355608

Multiplexing control operations of motors

A system and method includes a multiplexed motor controller for controlling multiple motors with a weight and volume penalty comparable to that of a single controller system and method by receiving a plurality of inputs indicating a status, prioritizing a plurality of sub-systems based on the status, multiplexing a plurality of operation commands in accordance with the prioritization, and generating a plurality of waveforms in accordance with the operation commands.. . ... Hamilton Sundstrand Corporation

12/10/15 / #20150355099

Scratch verification apparatus and method

A scratch verification method and apparatus for detecting and analyzing defects in a surface, the apparatus include a detection device with a plurality of emission sources and a plurality of sensors. A processor is connected to the detection device and is configured to apply one or more sets of criteria to one or more corresponding target areas of a surface. ... Hamilton Sundstrand Corporation

12/10/15 / #20150354686

Three point harmonic drive

A harmonic drive is provided and includes a toothed harmonic ring gear, a harmonic wave generator including a rotor element, which includes an outer three-lobe wave profile, and a stator element configured to drive rotation of the rotor element. The harmonic drive further includes a harmonic flex spine radially interposed between the harmonic ring gear and the rotor element. ... Hamilton Sundstrand Corporation

12/10/15 / #20150354592

Ram air fan outer housing

A ram air fan outer housing for directing air from a ram air fan rotor and air from a ram air bypass into a ram air fan outlet. The outer housing includes an outer cylinder with a ram air fan rotor end and a ram air fan outlet end. ... Hamilton Sundstrand Corporation

12/10/15 / #20150354562

Gear pump driven gear stationary bearing

One embodiment includes a gear pump with a driven gear, a gear shaft passing through the driven gear, and a stationary journal bearing. Also included is a fluid film, between a surface of the stationary journal bearing and a surface of the gear shaft, and a hybrid pad on the stationary journal bearing. ... Hamilton Sundstrand Corporation

12/10/15 / #20150354561

Gear pump drive gear stationary bearing

One embodiment includes a gear pump with a drive gear, a gear shaft passing through the drive gear, and a stationary journal bearing. Also included is a fluid film, between a surface of the stationary journal bearing and a surface of the gear shaft, and a hybrid pad on the stationary journal bearing. ... Hamilton Sundstrand Corporation

12/10/15 / #20150354560

Gear pump drive gear pressure loaded bearing

One embodiment includes a gear pump with a drive gear, a gear shaft passing through the drive gear, and a pressure loaded journal bearing. Also included is a fluid film, between a surface of the pressure loaded journal bearing and a surface of the gear shaft, and a hybrid pad on the pressure loaded journal bearing. ... Hamilton Sundstrand Corporation

12/10/15 / #20150354559

Gear pump driven gear pressure loaded bearing

One embodiment includes a gear pump with a driven gear, a gear shaft passing through the driven gear, and a pressure loaded journal bearing. Also included is a fluid film, between a surface of the pressure loaded journal bearing and a surface of the gear shaft, and a hybrid pad on the pressure loaded journal bearing. ... Hamilton Sundstrand Corporation

12/10/15 / #20150354459

Fuel injector for high altitude starting and operation of a gas turbine engine

A fuel injector for a combustor of a gas turbine engine includes an air swirler adjacent to a pressure atomizer.. . ... Hamilton Sundstrand Corporation

12/10/15 / #20150352661

Ultrasonic additive manufacturing assembly and method

In one aspect, an assembly is provided. The assembly includes a substrate having a top surface and an inner wall, the inner wall defining a cavity, and at least one metal foil layer ultrasonically welded to the substrate top surface using an ultrasonic additive manufacturing process. ... Hamilton Sundstrand Corporation

12/03/15 / #20150349694

Light weight filter with dc common mode inductor for electric aircraft motor controller

A motor controller has a direct current input, inverter, common mode filter, differential mode filter, and an output terminal. The direct current input is electrically connected to the common mode filter. ... Hamilton Sundstrand Corporation

12/03/15 / #20150349662

Pulse-width modulation control of paralleled inverters

A system includes a paralleled inverter circuit and a controller. The paralleled inverter circuit includes a first inverter and a second inverter. ... Hamilton Sundstrand Corporation

12/03/15 / #20150349660

Solid-state inverters with voltage-balanced switches

A phase leg for a multilevel inverter includes a positive dc lead, a first outer mosfet connected to the positive dc lead, a first inner igbt connected to the first outer mosfet, a second inner igbt connected to the first inner igbt, and a second outer igbt connected to the second inner igbt. The first and second outer mosfets are superjunction mosfets voltage balanced by the first and second igbts for reducing voltage stress in the solid-state switch phase leg when the superjunction mosfet and the igbt are conducting current from the dc lead to the ac lead.. ... Hamilton Sundstrand Corporation

12/03/15 / #20150349658

Regulated ac-dc hybrid rectifier

A regulated hybrid ac-dc rectifier employing a boost stage is disclosed herein. The regulated hybrid ac-dc rectifier comprises a 12 pulse inductive current splitter/merger (csm) system coupled to a boost stage. ... Hamilton Sundstrand Corporation

12/03/15 / #20150349626

Output filter for paralleled inverter

A power conversion system includes a paralleled inverter and a plurality of coupling inductors. The paralleled inverter is configured to convert a direct current input into an alternating current output and includes a first inverter having a first plurality of phase outputs and a second inverter having a second plurality of phase outputs, which may achieve negligible common-mode output voltage. ... Hamilton Sundstrand Corporation

12/03/15 / #20150349598

Multiplex winding synchronous generator

A multiplex winding synchronous generator includes a stator core with a plurality of winding slots; and power coils being distributed in each of the winding slots that are configured to supply multi-phase alternating current (ac) power. Also, the stator core includes at least two sets of power coils being distributed in the slots.. ... Hamilton Sundstrand Corporation

12/03/15 / #20150349356

Hybrid emergency power unit system

An integrated hybrid emergency power system having various features is disclosed. A hybrid emergency power system may have an auxiliary power unit and an emergency power unit. ... Hamilton Sundstrand Corporation

12/03/15 / #20150348728

Method of redundant monitoring and protection of ac power generation channels

A power quality control circuit is connected to monitor an ac input power and selectively connect the ac input power through a contactor. The power quality control circuit includes power quality monitor circuitry that determines whether the ac input power has an overfrequency condition, an underfrequency condition, an overvoltage condition or an undervoltage condition, and prevents closing of the contactor in response to a determination of any of those conditions.. ... Hamilton Sundstrand Corporation

12/03/15 / #20150348721

Remote switch contact quality maintenance

A system for maintaining integrity of a switch contact includes a first resistor-capacitor circuit, a second resistor-capacitor circuit, and a control switch. The first resistor-capacitor circuit is connected to an output of the switch contact and includes a first resistor and a first capacitor. ... Hamilton Sundstrand Corporation

12/03/15 / #20150347127

Method and system for implementing software requirements

A method for incorporating a set of requirements into an executable program to be run on an airborne system is provided. The method obtains the set of requirements for the program in a first format. ... Hamilton Sundstrand Corporation

12/03/15 / #20150346255

Method of detection and isolation of faults within power conversion and distribution systems

A power conversion and distribution system detects faults by monitoring differential current and differential power at certain locations in the system. Current loss faults are detected based on the monitored differential current, and series arc faults are detected based on the monitored differential power. ... Hamilton Sundstrand Corporation

12/03/15 / #20150346035

Flexible laminated thermocouple

A flexible laminated thermocouple is provided and includes layers of insulation material. At least one of the layers has a longitudinal axis and includes thermocouple conductors formed of differing electrically conductive materials. ... Hamilton Sundstrand Corporation

12/03/15 / #20150345606

Harmonic drive assembly with selective disconnect and reconnect

A selectively disconnectable and reconnectable harmonic drive assembly of a rotary actuator is provided. The drive assembly includes a harmonic wave generator configured to rotate and disconnect and reconnect a harmonic drive of the actuator by moving radially inward to allow the disconnect of a flex spline from a ring gear and radially outward to allow the reconnect of the flex spline to the ring gear. ... Hamilton Sundstrand Corporation

12/03/15 / #20150345510

Rotary machine heat sink

A heat sink that can be positioned around a rotating shaft includes a cylindrical body with a first end and a second end, a bore running through the body with a first opening at the first end of the body and a second opening at the second end of the body, fins extending radially outward from the body and running from the first end to the second end of the body, and channels defined between the fins and running from the first end to the second end of the body.. . ... Hamilton Sundstrand Corporation

12/03/15 / #20150345506

Cover plate for cabin air compressor

A cover plate for use in a cabin air compressor is a generally cylindrical body with 19 holes extending through the body and an inner bore defining an inner diameter centered on a center axis. The body has a thickness in a dimension measured perpendicular to the central axis. ... Hamilton Sundstrand Corporation

12/03/15 / #20150344152

Aircraft external dc power voltage protection

An external power supply system for an aircraft includes a power receptacle configured to connect to an external power source to provide external power, a power switch operative to switch between a battery power source and the external power source, and a voltage check system configured to prevent at least one of under-voltage or over-voltage of an aircraft electrical system. The voltage check system includes a voltage relay sensor configured to determine if the external power is within a suitable voltage range and a check switch operatively connected to the voltage relay sensor, wherein if the external power is within a suitable voltage range, the voltage relay sensor activates the check switch to allow external power to the aircraft electrical system, and wherein if the external power is outside the suitable voltage range, then the voltage relay sensor does not allow power to the aircraft electrical system.. ... Hamilton Sundstrand Corporation

12/03/15 / #20150343911

Power converters

A power converter includes a first set of transistors electrically connected in series, a second set of transistors electrically connected in series, and an ac link. The second set of transistors is electrically connected in parallel with the first set of transistors to form an h-bridge. ... Hamilton Sundstrand Corporation

11/26/15 / #20150340973

Brake controller

A system and method for controlling a brake coil in a motor having a control processor and a controller in communication with the control processor, the controller comprising a processor and memory with instructions stored thereon when executed by the processor cause the controller to receive signals indicative of threshold current values for the brake coil; provide enabling signals to each of a high-side and low-side driver circuit; receive signals indicative of a sensed current in the brake coil; compare the sensed current with the threshold current values; and provide an adjustment signal if the sensed current is outside a known range of values for the threshold current values.. . ... Hamilton Sundstrand Corporation

11/26/15 / #20150339181

Digital information transfer system including fault protection

A digital information transfer system includes an electronic driver unit in electrical communication with a power supply to receive an input voltage. The driver converts the input data into output data based on a digital information transfer system protocol. ... Hamilton Sundstrand Corporation

11/26/15 / #20150338857

Pressure-regulating valves

A pressure-regulating valve includes a valve sleeve with first and second ends defining a longitudinal axis, a sense line, a sense piston, a main chamber, and first and second valve spools. The sleeve includes an axially aligned bore. ... Hamilton Sundstrand Corporation

11/19/15 / #20150333607

Integrated drive generator housing

A method of assembling an integrated drive generator includes the steps of providing a bore in a center housing portion, pressing a bearing liner into the bore, with a portion of the bearing liner extending proud of a surface of the center plate, and machining the surface around and adjacent to the bearing liner to provide a machined surface parallel to the surface.. . ... Hamilton Sundstrand Corporation

11/19/15 / #20150332881

Electromechanical fuse for differential motion sensing

An electromechanical fuse of a differential motion sensor is provided. The fuse includes at least one thick layer that acts as an insulating envelope of the fuse. ... Hamilton Sundstrand Corporation

11/19/15 / #20150331026

Frequency detection circuits

A frequency monitoring circuit includes a monitoring lead, a d-type flip-flop, and a one-shot. The d-type flip-flop has a switchable logic state, a clear input, and a clock input. ... Hamilton Sundstrand Corporation

11/19/15 / #20150330718

Integrated blower diffuser-fin single phase heat exchanger

A method and apparatus for exchanging heat between two fluids is disclosed. The apparatus includes an integrated blower with a diffuser fin baseplate. ... Hamilton Sundstrand Corporation

11/19/15 / #20150330521

Contamination resistant cartridge valve

In one aspect, a pressure regulating valve assembly is provided. The valve assembly includes a housing having a fluid inlet and a fluid outlet, a sleeve positioned within the housing, and a spool at least partially positioned within the sleeve. ... Hamilton Sundstrand Corporation

11/19/15 / #20150330331

Ram air turbine driveshaft gear and bearing arrangement

A ram air turbine is presented that includes a turbine having a blade and a turbine shaft, a strut removably coupled to the turbine, wherein the strut has a gearbox section and a drive section, a turbine shaft with a bevel gear oriented perpendicularly to the turbine shaft and positioned within the gearbox section of the strut, a driveshaft coupled to the generator and positioned within the drive section of the strut, and a pinion gear that engages with the bevel gear, wherein the pinion gear is secured to the driveshaft by a spanner nut, wherein the pinion gear utilizes a key configured to interact with the keyed joint of the driveshaft. The pinion gear is supported by a pinion bearing that may be press fit onto the pinion gear and by one of the generator bearings.. ... Hamilton Sundstrand Corporation

11/19/15 / #20150330311

Fuel metering valve and method of managing fuel in a metering valve

A fuel metering valve includes a main flow path extending axially between an inlet and an outlet. Also included is a plunger disposed around a portion of a plunger guide, the plunger and the plunger guide configured to translate between an open position and a closed position to selectively distribute a fuel flowing through the main flow path to the outlet of the fuel metering valve. ... Hamilton Sundstrand Corporation

11/19/15 / #20150329215

Ram air turbine generator assemblies

A ram air turbine having a turbine with one or more blades, a strut having a drive section and a generator adapter section, a turbine shaft and bevel gear located within the drive section, a generator positioned within the generator adapter section of the strut and comprising an exciter and permanent magnet generator in the a turbine side, and a driveshaft having a pinion gear that engages with the bevel gear, wherein the driveshaft is removably coupled to the generator. The strut includes a cone positioned between the drive section and the generator adapter section, and the permanent magnet generator and the exciter are positioned inside of the cone of the strut. ... Hamilton Sundstrand Corporation

11/19/15 / #20150329214

Ram air turbine gearbox sealing

A ram air turbine includes a turbine with one or more blades, a strut removably coupled to the turbine and having a gearbox section and a drive section, a cover located at an end of the gearbox section of the strut with a test plug having a static seal, a turbine shaft and a bevel gear located in the gearbox section of the strut and a driveshaft and a pinion gear located in the drive section of the strut, wherein the pinion gear engages with the bevel gear. The turbine shaft may include a dynamic seal that provides sealing between the turbine shaft and the cover. ... Hamilton Sundstrand Corporation

11/19/15 / #20150329213

Integral ram air turbine strut and gearbox

A ram air turbine is provided that utilizes a one-piece strut. The strut includes an integral gearbox section and an integral drive section. ... Hamilton Sundstrand Corporation

11/05/15 / #20150318103

Hybrid planar common-mode choke

A common-mode choke includes a plurality of hybrid core inductors and a printed circuit board. Each of the plurality of hybrid core inductors includes a first core made of a first material, a second core made of a second material, and at least one common coil configured to generate a magnetic field in both the first and second cores. ... Hamilton Sundstrand Corporation

11/05/15 / #20150315975

Integral filter and regulator for valve

A bleed air control valve includes a pneumatic actuator operable to drive rotation of a closure disk, a connecting rod, a shaft, and an actuator fluid supply passage. The pneumatic actuator includes an integral filter and pressure regulator unit disposed in line with the actuator fluid supply passage. ... Hamilton Sundstrand Corporation

11/05/15 / #20150314878

Aircraft environmental conditioning system and method

An aircraft environmental conditioning system is disclosed having an air cycle machine for conditioning an airflow comprising hot compressed air by reducing its temperature and pressure. The air cycle machine is disposed in a housing in an unpressurized area of the aircraft, and produces conditioned pressurized air for delivery to a pressurized area of the aircraft. ... Hamilton Sundstrand Corporation

11/05/15 / #20150314877

Environmental control system with air cycle machine bypass shutoff valves

An environmental control system includes an air cycle machine. The air cycle machine includes a compressor section with a compressor inlet and a compressor outlet, and a first turbine section with a first turbine inlet and a first turbine outlet. ... Hamilton Sundstrand Corporation

11/05/15 / #20150314666

Aircraft environmental conditioning system and method

An aircraft environmental conditioning system is disclosed that includes an air cycle machine for conditioning an airflow comprising hot compressed air by reducing its temperature and pressure. The air cycle machine is disposed in a housing in an unpressurized area of the aircraft, and produces conditioned pressurized air in a conduit for delivery to a pressurized area of the aircraft. ... Hamilton Sundstrand Corporation

11/05/15 / #20150314404

Thrust plate including cooling slots

A thrust plate includes an annular-shaped body having a scalloped outer edge that forms a first circumference defined by a first diameter. The thrust plate further includes a plurality of cooling slots formed in a first surface of the body. ... Hamilton Sundstrand Corporation

10/29/15 / #20150308878

Starter oil quantity indication system

A starter can be configured for use with a turbomachine and includes a housing defining a cavity, wherein the cavity is configured to hold a quantity of starter oil, and a temperature sensor disposed within the cavity and configured to sense a temperature within the housing. A system includes a starter for a turbomachine as described herein and a computing apparatus configured to receive signals from the temperature sensor and to determine if the temperature within the housing indicates a sufficient quantity of starter oil. ... Hamilton Sundstrand Corporation

10/29/15 / #20150308460

Inlet tube design

A ram air fan assembly includes an outer housing. An inner housing is located within the outer housing. ... Hamilton Sundstrand Corporation

10/29/15 / #20150308373

Method of scheduling pressure in variable pressure actuation systems

In one aspect, a variable pressure actuation system is provided. The variable pressure actuation system includes an actuator configured to control a variable geometry device, and a fluid line fluidly coupled to the actuator. ... Hamilton Sundstrand Corporation

10/29/15 / #20150308283

Turbomachine starter oil filtration system

A starter configured for use with a turbomachine includes a housing defining a cavity, a transmission operative to convert an airflow into rotational motion for starting an engine, wherein the cavity is configured to hold a quantity of starter oil for lubricating at least a portion of the transmission, and an oil filter disposed in fluid communication with the starter oil.. . ... Hamilton Sundstrand Corporation

10/29/15 / #20150307367

Low pressure drop remediation bed for water based coolant loops

A method of remediating a water-based fluid includes the steps of providing a container providing a fluid cavity and organic, inorganic and biological remediation media within the cavity. The container is tubular and provides a linear flow direction, organic, inorganic and biological remediation media arranged in the cavity and configured to permit a water-based fluid within the cavity to simultaneously flow through the media. ... Hamilton Sundstrand Corporation

10/29/15 / #20150307196

Environmental control system utilizing shoestring cycle to maximize efficiency

A method for providing recirculation air to an environmental control system is provided. The method includes supplying via an inlet a flow of bleed air to the environmental control system at a first energy, providing the bleed air from the environmental control system at a second energy into a chamber, and providing the recirculation air to the environmental control system by recirculating the bleed air at a third energy from the chamber to an air cycle machine.. ... Hamilton Sundstrand Corporation

10/29/15 / #20150307195

Environmental control system utilizing shoestring cycle to maximize efficiency

An environmental control system comprising that utilizes recirculation air. The environmental control system includes an inlet configured to supply bleed air at a first energy from a source to the environmental control system, where the environmental control system supplies the bleed air at a second energy to a chamber. ... Hamilton Sundstrand Corporation

10/29/15 / #20150307183

Aircraft environmental control system selectively powered by three bleed reports

An engine compressor bleed system of an engine for an aircraft is provided including a plurality of compressor pressure ports configured to supply bleed air to satisfy a cooling load for at least a first stage of a flight profile of an aircraft. A first pressure port of the plurality of compressor pressure ports is configured to provide bleed air having a pressure at least equal to a cabin pressure of an aircraft and a temperature that does not exceed a predetermined threshold.. ... Hamilton Sundstrand Corporation

10/22/15 / #20150300749

Motor with cooled rotor

A fan includes an air movement implement including a blade and a motor that drives the air movement implement. The motor includes a rotor that includes an internal diameter heat exchanger and a heat pipe having a first end and a second end, the first end in thermal contact with the internal diameter heat exchanger and the second end in thermal contact with the blade.. ... Hamilton Sundstrand Corporation

10/01/15 / #20150280595

Switch configuration for a matrix convertor

A power conversion system includes a power source, a matrix converter, and a controller. The power source is configured to produce an input power. ... Hamilton Sundstrand Corporation

10/01/15 / #20150280528

Speed detection circuits for permanent magnet alternators

A permanent magnet alternator (pma) includes a rotatable shaft, windings, a shunt regulator circuit, and a speed detection circuit. The rotatable shaft is connected electromagnetically to the windings. ... Hamilton Sundstrand Corporation

10/01/15 / #20150280513

Motor housing

A motor housing includes a central body having a central cavity region configured to receive an electric motor. Also included is a first end portion having a first inner surface that defines a first internal cavity region configured to receive a first end winding of a stator of the electric motor, wherein the first internal cavity region comprises a first radius defined by a distance from a main axis of the motor housing to the first inner surface. ... Hamilton Sundstrand Corporation

10/01/15 / #20150280422

Fault protection of a voltage differential transformer (vdt) excitation circuit

An excitation circuit includes an operational amplifier, a transistor circuit, a switch, and a pull-down resistor. The operational amplifier receives an excitation input voltage at a non-inverting input and provides an operational amplifier output. ... Hamilton Sundstrand Corporation

10/01/15 / #20150276560

Chemical detector

A chemical detector is provided and includes a chemical detector device and a chemical agent aerosol vaporizer assembly. The chemical agent aerosol vaporizer assembly includes a vaporizer fluidly interposed between an inlet and an outlet and is configured to receive via the inlet a chemical agent aerosol in the vaporizer wherein the chemical agent aerosol is smeared against a fluted surface that is passivated against adsorption and vaporized. ... Hamilton Sundstrand Corporation

10/01/15 / #20150276331

Outlet header of heat exchanger

An outlet header of a heat exchanger is provided. The outlet header defines a flow-tap-off duct and includes an l-tube. ... Hamilton Sundstrand Corporation

10/01/15 / #20150276324

Capillary pump assisted heat pipe

A heat transport device includes a heat pipe having a capillary container having a wick and a working fluid arranged therein. A first heat source is coupled to a first end of the capillary container to define an evaporator section and a cold sink is coupled to a second end of the capillary container to define a condenser section. ... Hamilton Sundstrand Corporation

10/01/15 / #20150276088

Pressure regulating valve and method of adjusting damping of the same

A pressure regulating valve includes a housing having a cavity therein with at least a first port, a second port and a third port in fluidic communication with the cavity, and a spool movable within the cavity. The spool separates the cavity into at least a first space and a second space, the first port and the second port are in alterable fluidic communication with the first space with movement of the spool altering a flow area connecting the first port with the second port. ... Hamilton Sundstrand Corporation

10/01/15 / #20150275933

Valves with metering sleeves

A valve includes a housing having an inlet and an outlet. A spool is fixed within the housing and defines a flow window therethrough for fluid communication between the inlet and the outlet. ... Hamilton Sundstrand Corporation

10/01/15 / #20150275910

Thrust plate assembly

An aspect is a thrust plate assembly for an air cycle machine. The thrust plate assembly includes an annular body defined by an outer rim and a main bore. ... Hamilton Sundstrand Corporation

10/01/15 / #20150275770

Jet engine actuation system

A jet engine actuation system includes a first ring gearbox, a second ring gearbox and an actuator. The first ring gearbox includes a first ring driveshaft coupled to a first portion of a synchronization ring included in a jet engine. ... Hamilton Sundstrand Corporation

09/24/15 / #20150271957

Cooling flow optimization

A remote power unit has an inlet duct and an outlet duct in a housing. The inlet and outlet ducts are configured to receive and expel cooling air from the remote power unit. ... Hamilton Sundstrand Corporation

09/24/15 / #20150270794

Soft-start control for electromechanical devices using a resistor-capacitor circuit

A system for controlling an electromechanical device includes a motor drive, a main controller, a voltage regulator and a resistor-capacitor circuit. The motor drive controls an electric motor of the electromechanical device. ... Hamilton Sundstrand Corporation

09/24/15 / #20150267824

Check valve with reduced opening speed

A check valve for a housing with adjacent first and second apertures separated by a septum comprises a hinge pin, a first flapper, and a second flapper. The hinge pin is located downstream of the septum. ... Hamilton Sundstrand Corporation

09/24/15 / #20150266572

Propeller blade having compliant spar core

A propeller blade includes a foam core formed of a combination of polyuria and polyvinyl chloride (pvc), an adhesive layer formed on the core and a structural layer that covers at least a portion of the adhesive layer and that surrounds at least a portion of the foam core.. . ... Hamilton Sundstrand Corporation

09/17/15 / #20150260047

Resistive-inductive propeller blade de-icing system including contactless power supply

An aircraft propeller de-icing system comprises at least one propeller blade coupled to a rotatable prop assembly. The prop assembly is configured to rotate in response to rotatably driving a propeller shaft. ... Hamilton Sundstrand Corporation

09/10/15 / #20150252852

Oil retention and delivery system for a bearing

A bearing seal assembly of a rotary machine includes and inner shaft and an outer shaft. The outer shaft is disposed concentrically around and radially outward from the inner shaft. ... Hamilton Sundstrand Corporation

09/10/15 / #20150252815

Fluid filtration using splines

An assembly for filtering a fluid includes a first rotatable shaft with a first set of splines. The first rotatable shaft has an internal cavity containing the fluid. ... Hamilton Sundstrand Corporation

09/10/15 / #20150251114

Bypass valve technology interface safety screen

A safety screen assembly includes a shroud sleeve with an upstream end that defines a flow inlet. A spring seat is disposed downstream from the shroud sleeve and includes a flow outlet. ... Hamilton Sundstrand Corporation

09/03/15 / #20150247463

Method of low pressure bleed

A method for decreasing a throttle setting at which a gas turbine-powered aircraft must switch from low-pressure bleed air to a high-pressure bleed air. The method includes flowing low-pressure bleed air from a compressor at a first pressure. ... Hamilton Sundstrand Corporation

09/03/15 / #20150247408

Fan rotor with thickened blade root

A fan rotor of an air cycle machine includes a hub with fan blades extending from the hub. Each of the plurality of fan blades includes a main airfoil portion located distally from the hub. ... Hamilton Sundstrand Corporation

09/03/15 / #20150246721

Aircraft propellers

An aircraft propeller taper bore insert apparatus is provided. The apparatus includes a tapered outer surface and an inner surface. ... Hamilton Sundstrand Corporation

08/27/15 / #20150240960

High opening velocity check valve

A check valve housing is provided and includes a base having opposite sides which are configured to form linear contact surfaces with check valve flappers pivotably disposed on either side of the base, respectively, and an additional structural member having a continuous body and opposite sides which are configured to form additional contact surfaces with each of the check valve flappers, respectively, the check valve flappers being configured to form a lip extending beyond the additional structural member.. . ... Hamilton Sundstrand Corporation

08/27/15 / #20150240841

Pressure switch for oil supply

A pressure switch including a pressure chamber and a moving disc. The moving disc is moveable in response to a pressure in the pressure chamber to cause contact between a moveable contact and a fixed contact. ... Hamilton Sundstrand Corporation

08/27/15 / #20150239632

Explosion proof by containment enclosure for housing electrical equipment

A low profile explosion proof by containment enclosure includes a base wall having first and second edge sections that are joined with third and fourth edge sections to define a substantially planar surface. First and second side walls extend from the first and second edge sections, and third and fourth side walls extending from the third and fourth edge sections and are joined with the first and second side walls. ... Hamilton Sundstrand Corporation

08/20/15 / #20150236565

Electric generator oil pump drive gear

A drive gear has a gear hub with a ledge. A plurality of gear teeth are formed at an outer periphery of the ledge, and centered about a central axis. ... Hamilton Sundstrand Corporation

08/20/15 / #20150233480

Pressure regulating valves for electrical generators

A pressure regulating valve includes a valve body and a screen body. The screen body wraps around the valve body and joins itself at a screen joint for coupling the screen body to the valve body. ... Hamilton Sundstrand Corporation

08/20/15 / #20150233460

Electric generator oil pump driven gear

A driven gear includes a radially outwardly extending flange. The radially outwardly extending flange extends along an axial distance defined along a center axis of the flange. ... Hamilton Sundstrand Corporation

08/20/15 / #20150233386

First stage turbine housing for an air cycle machine

A housing of an air cycle machine includes a static seal portion, a main bore housing portion, a shroud pilot housing portion, and a thrust plate housing portion. The static seal portion is arranged about a central axis and defines static seal radius d1. ... Hamilton Sundstrand Corporation

08/20/15 / #20150233249

Propeller blade and method

A propeller blade includes an inner spar structure surrounding an inner spar foam core. Also included is a leading edge foam structure disposed proximate a leading edge of the inner spar structure. ... Hamilton Sundstrand Corporation

08/20/15 / #20150232195

Ram air turbine actuator

A component for use in a ram air turbine actuator includes a lock bolt extending along a centerline with the lock bolt being axially movable between a stowed position and a deployed position and a plurality of rollers that are radially outward from the centerline and guided by the lock bolt. The component also includes a slider radially between at least a portion of the lock bolt and a piston rod with the slider being axially movable between a stop position and the deployed position and up-lock wedges supported by the piston rod. ... Hamilton Sundstrand Corporation

08/20/15 / #20150232194

Stall recovery system for a ram air turbine

In one aspect, a ram air turbine stall recovery system includes a ram air turbine, a hydraulic pump powered by the ram air turbine with the hydraulic pump having a pump inlet and a pump outlet, an electric generator powered by the ram air turbine, a bypass line that connects the pump outlet to the pump inlet, a bypass valve located on the bypass line between the pump outlet and the pump inlet; and a controller responsive to an input signal that indicates a potential stall condition of the ram air turbine. The controller causes the bypass valve to open to allow a hydraulic fluid to flow through the bypass line in order to reduce a pressure within the hydraulic pump.. ... Hamilton Sundstrand Corporation

08/13/15 / #20150228405

Rotary transformers for electrical machines

A rotary transformer includes a shaft, a stator, and a rotor. The stator has a pole surface extending about the shaft. ... Hamilton Sundstrand Corporation

08/13/15 / #20150225053

Cyclic pitch actuation system for counter-rotating propellers

A counter-rotating propeller system comprises a cyclic pitch system connected to a first plurality of propeller blades and a variable pitch system connected to a second plurality of propeller blades. The first plurality of propeller blades and the second plurality of propeller blades are configured to rotate about a common axis.. ... Hamilton Sundstrand Corporation

08/13/15 / #20150224593

Article including a weld joint

An article is provided and includes a first part having a first edge defined at an intersection of first and second surfaces where the first and second surfaces form a first angle, a second part having a second edge defined at an intersection of third and fourth surfaces where the third and fourth surfaces form a second angle which is different from the first angle and a weld joint formed at locations where the first surface contacts the third surface.. . ... Hamilton Sundstrand Corporation

07/30/15 / #20150214819

High altitude, high voltage rear terminal block assembly

A disclosed terminal block assembly for a generator includes a terminal block with a base with first and second transverse terminal surfaces adjoining one another. One of the terminal surfaces includes an increased width greater than a length of a cable terminal lug for providing a lightning strike and creepage barrier. ... Hamilton Sundstrand Corporation

07/30/15 / #20150213952

Multilayer capacitor with integrated busbar

Embodiments are directed to obtaining a specification of at least one operational requirement for at least one capacitor, generating a design of the at least one capacitor to satisfy the at least one operational requirement, the design of the at least one capacitor comprising a plurality of layers and a first integrated busbar coupled to at least a portion of the layers, and based on the design, manufacturing the at least one capacitor by utilizing an additive manufacturing technique.. . ... Hamilton Sundstrand Corporation

07/30/15 / #20150211814

Heat switch radiators for variable rate heat rejection

A heat switch includes a heat sink, a coolant tube, and an actuator. The coolant tube is movable with respect to the heat sink. ... Hamilton Sundstrand Corporation

07/23/15 / #20150204745

Strain gauge pressure sensor circuit with sensor disconnect detection

An electronic circuit for processing signals from a strain gauge pressure sensor includes an anti-alias filter, an analog-to-digital conversion circuit, and a detection circuit for detecting when the sensor is unexpectedly disconnected from the signal processing circuit. The detection circuit provides a yes/no indication of the connection of the pressure sensor to the circuit based upon whether a common mode voltage associated with one of the signal terminals of the pressure sensor is out of range.. ... Hamilton Sundstrand Corporation

07/23/15 / #20150204203

Fabrication of load compressor scroll housing

A method of fabricating a load compressor scroll housing includes the steps of forging near net shape parts that are machined and subsequently welded together. The forged portions are machined to define specific features of the scroll housing along with the mating surfaces. ... Hamilton Sundstrand Corporation

07/16/15 / #20150200769

Cross-channel data communication with data phase-locked loop

A data communication system includes a unit that receives edge-encoded data from a data link. The unit includes a counter, a data bit reader, and a phase-locked loop. ... Hamilton Sundstrand Corporation

07/09/15 / #20150194905

Universal ac to dc converter

A universal ac to dc converter may be configured to convert alternating current (ac) to direct current (dc), such as for use in aerospace applications. The disclosure relates to a single universal power electronic converter capable of converting an ac input voltage, such as a line to neutral input voltage of either 115 vrms or 230 vrms nominal to 28 v dc.. ... Hamilton Sundstrand Corporation

07/09/15 / #20150194863

Grounded radial diode pack

The present disclosure relates to generators and their components. Specifically, a grounded radial diode pack is disclosed herein. ... Hamilton Sundstrand Corporation

07/09/15 / #20150194797

Heat sink for contactor in power distribution assembly

An electrical contactor assembly is provided including an electrical bus bar and at least one electrical contactor. The electrical bus bar includes a layer of insulation, a layer of copper, and a composite core having at least one wire embedded therein. ... Hamilton Sundstrand Corporation

07/09/15 / #20150194750

Field-replaceable terminal block divider

A terminal block assembly with one or more removable dividers. The dividers include a tenon that can be inserted into a groove in one or more blocks. ... Hamilton Sundstrand Corporation

07/09/15 / #20150194260

Rolled inductor with thermal pottant

A plurality of cores are arranged in a loop between an inner wall and an outer wall. A gap filler is arranged circumferentially between each of the plurality of cores. ... Hamilton Sundstrand Corporation

07/09/15 / #20150192200

Carrier shaft set

A carrier shaft set includes an input carrier shaft portion and a carrier shaft portion. The input carrier shaft portion has an input carrier shaft portion axis defined between a planetary gear set end and an input shaft end having an outer surface. ... Hamilton Sundstrand Corporation

07/09/15 / #20150192177

Spline lock shaft locking system

A coupling shaft assembly system is disclosed. A coupling shaft assembly system may have a coupling shaft spline lock body having spline lock spline teeth, a main coupling shaft body having input spline teeth, and a locking bolt, wherein the locking bolt retains the coupling shaft spline lock body in substantially fixed communication with the main coupling shaft body, wherein the coupling shaft spline lock body retains the coupling shaft assembly system in mechanical communication with a power shaft. ... Hamilton Sundstrand Corporation

07/09/15 / #20150192175

Cage bearing with oil retaining shield

A bearing system may have an inner race coupled to an outer race defining a lubrication volume and a shield coupled to the outer race, the shield at least partially defining an aperture of the lubrication volume. The aperture may permit the flow of lubricating oil through the bearing system. ... Hamilton Sundstrand Corporation

07/02/15 / #20150184700

Drive assembly with selective disconnect

A drive assembly with selective disconnect includes a motor with a motor drive shaft; a harmonic drive coupled to one end of the motor drive shaft; an output shaft coupled to the harmonic drive; and a retracting mechanism that selectively retracts the motor drive shaft axially to decouple the motor drive shaft from the harmonic drive.. . ... Hamilton Sundstrand Corporation

07/02/15 / #20150183523

Tail cone driven emergency power generating system

A tail cone integrated ram air turbine (rat) includes a rotatable segment of an aircraft tail cone configured to deploy a set of rat blades. The tail cone integrated rat also includes a power transfer shaft connected between the rotatable segment and configured to transfer power to from the rotatable segment to an auxiliary power unit (apu). ... Hamilton Sundstrand Corporation

06/25/15 / #20150176767

Condensation reduction around cryogenic service connection

The system has a cryogenic tank and a connection for supplying a first fluid to the cryogenic tank. The fluid connection is provided with at least one valve which may be selectively opened to receive the fluid and one valve for venting. ... Hamilton Sundstrand Corporation

06/25/15 / #20150176716

Fuel float valve

A fuel system includes a fuel tank that has a wall with an opening. A fuel float valve includes a float and a seal plate that are arranged on opposing ends of a beam. ... Hamilton Sundstrand Corporation

06/18/15 / #20150166186

Aircraft air-conditioning heat exchanger contamination detection

An aircraft system includes a fan, a differential pressure sensor, a temperature sensor, and a system controller. The fan provides airflow for at least one heat exchanger. ... Hamilton Sundstrand Corporation

05/28/15 / #20150147664

Method of operating a fuel cell in confined space

A method of operating a fuel cell in a vehicle includes the steps of initially charging a waste tank with a gas that is readily absorbable in water. A supply of fuel is passed across one electrode in a fuel cell, and a supply of oxygen containing gas across another electrode generating water from operation of the fuel cell. ... Hamilton Sundstrand Corporation

05/28/15 / #20150147181

Differential blade design for propeller noise reduction

A propeller is provided including a hub and a first blade group and a second blade group. The first blade group includes at least one first propeller blade and the second blade group includes at least one second propeller blade. ... Hamilton Sundstrand Corporation

05/28/15 / #20150145461

Input emi filter for motor drive including an active rectifier

A poly-phase motor drive includes an input emi filter having a poly-phase filter input and a poly-phase filter output and an active rectifier connected to the filter output. The input emi filter includes notch filters tuned at active rectifier and motor drive inverter switching frequencies and diverts common-mode current into dc bus. ... Hamilton Sundstrand Corporation

05/21/15 / #20150137786

Overvoltage limiter in an aircraft electrical power generation system

. . A method of limiting a generator voltage in an overvoltage condition includes the steps of determining an amount of overvoltage of a generator output voltage exceeding a specified voltage and calculating a reference threshold voltage based upon the duration of overvoltage. A switch is modulated according to a voltage error between the output voltage and the reference threshold voltage. ... Hamilton Sundstrand Corporation

05/21/15 / #20150135507

Protective leakage shield for liquid to air heat exchanger

A leakage shield for an air to liquid heat exchanger includes a drain pan, a liquid header panel, and a closure bar. The drain pan has a first side and a second side opposite the first side. ... Hamilton Sundstrand Corporation

05/07/15 / #20150124407

High-temperature environment electronic chassis

An electrical chassis for use in high temperature environments is disclosed. The electrical chassis may be employed, for example, in close proximity to the combustion chamber of a jet engine. ... Hamilton Sundstrand Corporation

05/07/15 / #20150123482

Active damping with a switched capacitor

An active damping switching system includes an active damping switching apparatus, including a damping capacitor, a damping resistor coupled to the damping capacitor, an input switch coupled to the damping capacitor, an oscillator coupled to the input switch and configured to open and close the input switch at a frequency, a direct current power source coupled to the active damping switching apparatus, a constant power load and an input filter disposed between the constant power load and the active damping switching apparatus.. . ... Hamilton Sundstrand Corporation

04/30/15 / #20150118052

Pivoting blade counterweight

A propeller system includes at least one propeller hub having a plurality of hub arms formed therein. The plurality of hub arms are arranged circumferentially on the at least one propeller hub and are spaced apart from one another by a hub distance. ... Hamilton Sundstrand Corporation

04/30/15 / #20150117942

Dowel element

A dowel element is provided and includes a shank portion including first and second mating parts. One of the first and second mating parts includes a first exterior surface and is formed to define an anti-fretting relief including a second exterior surface recessed from the first exterior surface in a radial dimension.. ... Hamilton Sundstrand Corporation

04/23/15 / #20150110633

Retention assembly with a conical interface for a propeller blade

A retention assembly for a propeller blade includes an inner ring that is conformally shaped to a bore of an annular loop, the annular loop being associated with a root portion of the propeller blade; a base that is configured to be immediately adjacent the annular loop; an annular outer ring including a bearing race interface that is conical in shape and includes a radially inner surface that conforms to a radially outer surface of the annular loop; and an adhesive that adhesively connects complementary surfaces of the outer ring and the annular loop. Also, a propeller blade assembly includes a propeller blade having a blade portion and a root portion; and the retention assembly that is configured to attach to the propeller blade.. ... Hamilton Sundstrand Corporation

04/23/15 / #20150110630

Retention assembly for a propeller blade

A retention assembly for a propeller blade includes an inner ring that is conformally shaped to a bore of an annular loop, the annular loop being associated with a root portion of the propeller blade; a base that is configured to be immediately adjacent the annular loop; an outer ring that includes an extended tapered portion which decreases in radial thickness from an inboard end to an outboard end; and an adhesive that adhesively connects complementary surfaces of the outer ring and the annular loop. Also, a propeller blade assembly includes a propeller blade having a blade portion and a root portion and the retention assembly configured to be attached to the propeller blade.. ... Hamilton Sundstrand Corporation

04/23/15 / #20150110429

Chambered shaft for improved bearing lubrication

A shaft for a bearing lubrication assembly includes an outer surface and a reservoir disposed within the shaft. A first seal groove is formed on the outer surface and extends a full circumference of the outer surface. ... Hamilton Sundstrand Corporation

04/23/15 / #20150108385

Rotary metering valve assembly and method of modifying contact surface for reducing gauge wringing

A rotary metering valve assembly includes a stationary body plate having a first contact surface. Also included is a valve plate having a second contact surface disposed in contact with the first contact surface of the stationary body plate, wherein the valve plate is configured to rotate relative to the stationary body plate. ... Hamilton Sundstrand Corporation

04/16/15 / #20150104313

Brush design for propeller deicing system

A brush configured to engage a rotating component to transfer an electrical signal and/or power is provided including a body formed from a core material. A coating material is disposed over a portion of the body configured to contact the rotating component. ... Hamilton Sundstrand Corporation

04/16/15 / #20150104309

Aircraft control system and method

An aircraft control system includes a co-axial, counter-rotating propeller shaft assembly. Also included is a first rotor operatively coupled to the propeller shaft assembly, the first rotor having a first plurality of blades mounted thereto, wherein the first plurality of blades are disposed at a substantially identical nominal pitch during rotation of the first rotor. ... Hamilton Sundstrand Corporation

04/16/15 / #20150104308

Brush design for propeller deicing system

A propeller assembly is provided including a plurality of blades arranged in diametrically opposed pairs. Each of the plurality of blades has an electrical deicer located thereon. ... Hamilton Sundstrand Corporation

04/16/15 / #20150104302

Ram air fan housing

A fan housing of a ram air fan assembly is provided including a flange having at least one tab. The at least one tab includes a first portion extending generally perpendicularly from the flange and a second portion extending generally parallel to the flange. ... Hamilton Sundstrand Corporation

04/16/15 / #20150104301

Motor housing for a cabin air compressor

Motor housing for a cabin air compressor includes a central body portion having a center wall thickness and an internal cavity that is configured to receive an electric motor, a first end portion having a second internal cavity that is configured to receive a first end winding of the stator, and a second end portion having a third internal cavity configured to receive a second end winding of the stator. A ratio of a wall thickness of either of the first or the second end portions to the motor wall thickness is at least greater than 1.68 to 1.. ... Hamilton Sundstrand Corporation

04/16/15 / #20150102128

Forming a complexly curved metallic sandwich panel

Aspects of the disclosure are directed to a bonding of a first skin and a second skin to a core material, coupling a sheet to the first skin to form with the first skin an enclosure containing the second skin and the core material, exposing the first skin, the second skin, and the core material to heat, and based on the exposition of heat, applying pressure via the enclosure to the first skin to cause the first skin to deform and expand to a shape of a die.. . ... Hamilton Sundstrand Corporation

04/16/15 / #20150101934

Controlled trivalent chromium pretreatment

A method for forming a trivalent chromium coating on an aluminum alloy substrate includes adding a chromium-containing solution to a vessel, immersing the aluminum alloy substrate in the chromium-containing solution, immersing a counter electrode in the chromium-containing solution, and applying an electrical potential bias to the aluminum alloy substrate with respect to its equilibrium potential to form a trivalent chromium coating on an outer surface of the aluminum alloy substrate. A method for forming a trivalent chromium coating on a metal substrate includes adding a chromium-containing solution to a vessel, immersing the metal substrate in the chromium-containing solution, immersing a counter electrode in the chromium-containing solution, and modulating an electrical potential difference between the metal substrate and the counter electrode to form a trivalent chromium coating on an outer surface of the metal substrate.. ... Hamilton Sundstrand Corporation

04/16/15 / #20150101838

Housings with embedded bus bars and standoffs

Housing for electrical components includes a housing body, an insulating body and a bus bar. The insulating body is disposed within the housing body and is integral with the housing body. ... Hamilton Sundstrand Corporation

04/16/15 / #20150101687

Liquid valve design with internal check valve

A valve is provided including a valve body and a valve element arranged within the valve body. The valve body includes an inlet port, an outlet port, and an inner surface that defines a flow channel. ... Hamilton Sundstrand Corporation

04/16/15 / #20150101339

Energy efficient pump system

A fuel system for a gas turbine engine, which includes a combustor section and an actuator, includes a fuel source, a combustor system, and an actuation system. The combustor system includes a combustor pump that is fluidly connected to the fuel source and to the combustor section, with the combustor pump being mechanically connected to and powered by an electric motor. ... Hamilton Sundstrand Corporation

04/09/15 / #20150100139

Frequency shifted pi controller

A system including a frequency shifted proportional-integral (pi) controller system utilizing input band-shifting, a pi control architecture and inverse band-shifting is disclosed. The frequency shifted pi controller system may eliminate errors and/or take control action based on past and present control errors. ... Hamilton Sundstrand Corporation

04/09/15 / #20150099205

Manifold for plural fuel cell stacks

An assembly has a plurality of fuel cell stacks with at least one wall. At least one manifold portion is provided outwardly of the at least one wall of each of the fuel cell stacks. ... Hamilton Sundstrand Corporation

04/09/15 / #20150099204

Regulation of a fuel cell assembly

A fuel cell assembly according to an exemplary aspect of the present disclosure includes, among other things, a first fuel cell stack in series with a variable resistor and a second fuel cell stack in parallel with the first fuel cell stack and in series with a contactor. A resistance level of the variable resistor is adjusted in response to deactivating the contactor.. ... Hamilton Sundstrand Corporation

04/09/15 / #20150098814

Turbine housing

A turbine housing includes a turbine inlet plenum and a turbine housing body. The turbine housing body includes a turbine outlet mounting face, a seal plate mounting face, and a center bore formed between the turbine outlet mounting face and the seal plate mounting face. ... Hamilton Sundstrand Corporation

04/09/15 / #20150098805

Insulating seal plate for an air cycle machine

A seal assembly of an air cycle machine includes a seal plate with an outer diameter. A bore extends axially through a center of the seal plate and a seal land is disposed at least partially within the bore. ... Hamilton Sundstrand Corporation

04/09/15 / #20150098190

Heat dissipation

Embodiments are directed to an apparatus comprising a thermal block coupled to an electronic device, a thermal strap coupled to the thermal block, and retention hardware coupled to the thermal strap and configured to retain the thermal block within the thermal strap when the apparatus is exposed to at least one variable environmental condition.. . ... Hamilton Sundstrand Corporation

04/09/15 / #20150098169

Bus bar assembly comprising a memory metal composition

A power distribution system element formed via an additive manufacturing technique, such as applying a conductive material to a memory metal substrate, are discussed herein. In operation (e.g. ... Hamilton Sundstrand Corporation

04/09/15 / #20150098161

Integrated corona fault detection

A power distribution cabinet includes a housing having walls that define an interior space for housing electric components. A capacitive sensor is located on an interior surface of one or more of the walls. ... Hamilton Sundstrand Corporation

04/09/15 / #20150097709

Resolver-to-digital converter

According to one aspect, a resolver-to-digital converter includes a first filter configured to receive a first delta-sigma modulated resolver input. A second filter is configured to receive a second delta-sigma modulated resolver input. ... Hamilton Sundstrand Corporation

04/09/15 / #20150097644

Magnetic devices with integral cooling channels

A magnetic device includes an electrically insulating body and a conductor coil. The insulating body defines an internal cavity for a magnetic device core and a coolant channel routed about the internal cavity. ... Hamilton Sundstrand Corporation

04/09/15 / #20150097580

Tip clearance measurement system

A tip clearance measurement system (tcms) includes a probe and sensing circuitry. The probe directs microwave signals toward a turbine blade and receives microwave signals reflected by the turbine blade. ... Hamilton Sundstrand Corporation

04/09/15 / #20150097506

Voltage step-up six-phase autotransformer passive rectification ac-dc converter

A three phase step-up autotransformer construction is discussed herein. The passive 12-pulse ac-dc converter offers simplicity, high reliability and low cost solution to ac-dc power conversion. ... Hamilton Sundstrand Corporation

04/09/15 / #20150097464

High speed rotor connection support

A rotor connection support comprising a main connection ring configured to reduce the moment load on fastener locations (such as threaded fastener locations) by integrating stand-off posts into a high strength plate are discussed herein. These stand-offs may be configured to reduce the stresses on the high stress concentration/low cross section threads. ... Hamilton Sundstrand Corporation

04/09/15 / #20150097372

Three phase flux switching generator in a three stage wound field synchronous machine

A brushless, three phase wound field synchronous machine (wfsm) provides an electromechanical power transfer system wherein it may serve as both a starter and a generator. Power for the excitation system of the wfsm is provided by a three phase flux switching generator (fsg). ... Hamilton Sundstrand Corporation

04/09/15 / #20150097130

Flux bypass for solenoid actuator

An electromagnetic solenoid actuator comprises a ferromagnetic core and a ferromagnetic plunger. The ferromagnetic core supports a plurality of windings, and is oriented along an axis. ... Hamilton Sundstrand Corporation

04/09/15 / #20150097077

Passive fail safe coupling mechanism

A ground propulsion assembly for an aircraft includes an axle, a wheel rotatably connected to the axle, and a transmission. The transmission includes a housing mounted proximate the axle and a drive element disposed at least partially outside of the housing and operatively connected to a power input. ... Hamilton Sundstrand Corporation

04/09/15 / #20150096437

Actuator for rat deployment

An assembly includes an actuator assembly having a housing, a piston positioned at least partially within the housing and movable relative to the housing for an overall actuation stroke, a first spring operatively engaged between the piston and the housing to provide actuation biasing force therebetween, a second spring operatively engaged with the piston, and a spring guide. The spring guide is operatively engaged with the first spring and operatively engaged with the piston via a sliding connection. ... Hamilton Sundstrand Corporation

04/09/15 / #20150096371

Speed sensor identification

A method of initializing speed sensors in a rotational system is used determine a sensor spacing. An indexing feature is identified at each of two locations on an outer circumference of a wheel path corresponding to two speed sensors, as well as the speed of the wheel. ... Hamilton Sundstrand Corporation

04/02/15 / #20150090436

Fluid based thermal conductivity control

A temperature control system may include a compartment having at least one side with low thermal conductivity and a side with a double wall, the double wall having an interior wall and an exterior wall, the interior wall and the exterior wall having high thermal conductivity and forming a channel therebetween and a reservoir connected to the channel. A drive may be contained within the reservoir, wherein the drive is responsive to a temperature within the compartment to transfer a liquid with high thermal conductivity from the reservoir into the channel to increase thermal conductivity between the interior of the compartment and the exterior of the compartment, and allows a gas with low thermal conductivity to be present within the channel when the channel does not contain the liquid to decrease thermal conductivity between the interior of the compartment and the exterior of the compartment.. ... Hamilton Sundstrand Corporation

03/26/15 / #20150086185

Pulse width modulated multiple heater control

A system includes, in one example, a first heater device, a second heater device, and a temperature sensor, each disposed within a fluid flow. The system further includes a controller communicatively coupled to the first heater device, the second heater device, and the temperature sensor. ... Hamilton Sundstrand Corporation

03/26/15 / #20150083378

System and method for distributing refrigerant to a parallel flow heat exchanger using refrigerant injectors

A heat exchanger is disclosed that includes a plurality of parallel refrigerant paths, and a refrigerant injector operatively associated with an inlet to each refrigerant path for independently metering single phase refrigerant into each of the parallel refrigerant paths.. . ... Hamilton Sundstrand Corporation

03/19/15 / #20150079487

Fuel cell with impurity filtering

A system has a fuel cell with an anode, a membrane, and a cathode. A source of fuel passes along the anode and a source of an oxygen containing gas passes along the cathode. ... Hamilton Sundstrand Corporation

03/19/15 / #20150076951

Electric machine construction

An electric machine includes a laminated stack. The laminated stack includes first and second additively manufactured conductive phase coils. ... Hamilton Sundstrand Corporation

03/19/15 / #20150076667

Semiconductor substrate including a cooling channel and method of forming a semiconductor substrate including a cooling channel

A semiconductor substrate for use in an integrated circuit, the semiconductor substrate including a channel defined on a surface of the substrate. The channel includes a first wall, a second wall, and a third wall. ... Hamilton Sundstrand Corporation

03/19/15 / #20150075310

Compound harmonic drive

A harmonic drive includes a first flexible gear and a second flexible gear disposed around the first flexible gear and coaxial with the first flexible gear. A first ring gear meshes with the first flexible gear, and a second ring gear meshes with the second flexible gear.. ... Hamilton Sundstrand Corporation

03/19/15 / #20150075215

System and method for distributing refrigerant to parallel flow paths of a heat exchanger using flow restrictors

A heat exchanger is disclosed that includes a plurality of parallel refrigerant paths, and a distributor for delivering refrigerant to the plurality of parallel refrigerant paths, the distributor defining a flow restrictor at an entrance to each refrigerant path, wherein the flow restrictors are configured to keep the distributor pressurized at a predetermined level and thereby maintain single phase refrigerant flow into each of the parallel refrigerant paths. The flow restrictors further induce even flow distribution by providing choked flow to each refrigerant path.. ... Hamilton Sundstrand Corporation

03/12/15 / #20150068620

Pressure regulating valve assembly

A pressure regulating valve assembly includes a housing. Also included is a valve sleeve mounted within a bore of the housing, the valve sleeve having a first portion and a second portion, the second portion having a diameter less than the first portion and received in a sense piston bore of the housing. ... Hamilton Sundstrand Corporation

03/12/15 / #20150068612

Valve with precision mounted hinge pin posts

A valve includes a housing with a flow passage and a hole extending into the housing; a post with a base and a hole extending into the base, the post connected to the housing; and a dowel pin which sits in the hole of the housing and extends into the hole in the post.. . ... Hamilton Sundstrand Corporation

03/12/15 / #20150068416

Low profile laminate assemblies

An assembly has a plurality of laminate components aligned atop each other. A first endplate is at one end of the assembly of components and a second endplate is at an opposed end. ... Hamilton Sundstrand Corporation

03/05/15 / #20150065025

Environmental control system including a compressing device

A compressing device added to a cabin air conditioning system to increase a pressure of air in the cabin air conditioning system itself and, thus, allow for lower pressure air to be bled from the engine. For instance, the compressing device allows air to be bled from a low, rather than a high, pressure locations of the engine.. ... Hamilton Sundstrand Corporation

03/05/15 / #20150065023

Intercompressor bleed turbo compressor

A bleed system that comprises a bleed inter-compressor fluidly coupled to a low pressure port of the bleed system and configured to utilize a portion of a medium received from the low pressure port to increase the pressure of another portion of that medium. A turbine of the bleed inter-compressor is coupled to a compressor of the bleed inter-compressor and drives the compressor via a shaft, so as to regulate the pressure of the medium.. ... Hamilton Sundstrand Corporation

03/05/15 / #20150064006

Ram air turbine startup

A ram air turbine (rat) in which a cam follower is operably coupled to turbine blades such that a cam follower position determines turbine blade pitch.. . ... Hamilton Sundstrand Corporation

03/05/15 / #20150060023

Fin-diffuser heat sink with high conductivity heat spreader

A method and apparatus for cooling a heat source is disclosed. The apparatus includes a fin-diffuser including a blower integrated with fins of a diffuser. ... Hamilton Sundstrand Corporation

03/05/15 / #20150059397

Method of operating a multi-pack enviromental control system

An environmental control system (ecs) pack is provided including a primary heat exchanger, a secondary heat exchanger, and an air cycle machine. The air cycle machine includes a compressor and a turbine. ... Hamilton Sundstrand Corporation

03/05/15 / #20150059356

Aircraft environmental control system selectively powered by three bleed ports

A bleed air supply system configured to supply bleed air from an engine to an environmental control system (ecs) pack is provided including a high pressure port configured to bleed air from a high spool of the engine. An intermediate pressure port is configured to bleed air from the high spool of the engine. ... Hamilton Sundstrand Corporation

02/26/15 / #20150053380

Heat exchanger fin with crack arrestor

A method of extending the lifetime of brazed primary hot inlet wavy fin structures of aircraft heat exchangers includes inserting slots in the fins. The slots increase the mechanical compliance of the fins as well as act as crack arrestors should a thermally induced fracture occur. ... Hamilton Sundstrand Corporation

02/19/15 / #20150050830

Power connector having enhanced thermal conduction characteristics

A power connector assembly is disclosed that includes a connector shell formed from a heat conducting material, a plurality of connector pins arranged in the connector shell, and a heat conduction element arranged in the connector shell in thermal contact with the plurality of connector pins for conducting heat dissipated by the connector pins to the connector shell.. . ... Hamilton Sundstrand Corporation

02/19/15 / #20150050149

Propeller pitchlock system with a rotating interface

A pitchlock system includes a ballscrew screw mounted along an axis of rotation of an actuator, the ballscrew screw has an internal ballscrew bore; a pitchlock nut mounted about the ballscrew screw, the pitchlock nut including an internal pitchlock nut thread; a ballscrew ballnut mounted about the ballscrew screw and axially adjacent the pitchlock nut; a pitchlock actuation rod mounted axially within the internal ballscrew bore, the pitchlock actuation rod having an internal pitchlock actuation bore and a ball bearing aperture for receiving multiple ball bearings; a pitchlock retainer pin mounted axially within the internal pitchlock actuation bore; and a belleville spring which biases the ballscrew screw towards an axially fixed surface of the actuator in a pitchlock position, the ballscrew screw being movable between an operational position and the pitchlock position.. . ... Hamilton Sundstrand Corporation

02/19/15 / #20150048699

Generators with open loop active cooling

A rotor body for a high-speed generator includes a rotor body with interior and exterior surfaces, a coolant inlet and outlet, and a rotor cooling path for actively cooling the rotor body. The coolant inlet and outlet extend between the interior and exterior surfaces. ... Hamilton Sundstrand Corporation

02/19/15 / #20150048617

Heated bypass valve for heat exchanger

A heat exchanger bypass system comprises a liquid circuit, a first fluid circuit, a second fluid circuit, a first heat exchanger, a second heat exchanger, a liquid bypass line and a heated bypass valve. The first heat exchanger thermally couples the first fluid circuit to the liquid circuit. ... Hamilton Sundstrand Corporation

02/19/15 / #20150047820

Bendable heat exchanger

A heat exchanger for disposition within a duct having a curved surface is provided and includes a frame formed to define an inlet, an outlet and an interior by which the inlet and outlet are fluidly communicative, the frame including first and second surfaces having curvatures similar to that of the curved surface on either side of the interior and a heat exchanger fin disposed in the interior, the fin having corrugations and being formed to define slots transverse to the corrugations such that the fin is bendable along the curvatures of the first and second surfaces.. . ... Hamilton Sundstrand Corporation

02/12/15 / #20150042437

Bobbins for gapped toroid inductors

A bobbin for spacing windings around an inductor core includes an interior spacer defining an exterior surface for coupling interior spacer with an annular inductor core and an interior facing surface opposing the exterior surface for receiving inductor windings. The interior spacer has a thickness profile between the exterior and interior facing surfaces for spacing the windings inward from the inductor core to reduce magnetic fringe flux effects on the windings. ... Hamilton Sundstrand Corporation

02/12/15 / #20150042087

Redundant seal assemblies for misaligned conduits

A seal assembly for accommodating misaligned conduits includes a first conduit, a second conduit, and a cup member. The first conduit has a first end and an opposed second end with a core. ... Hamilton Sundstrand Corporation

02/12/15 / #20150041109

Heat exchanger thermal fatigue stress reduction

A plate fin heat exchanger includes a plate fin core having a plurality of plates defining a set of hot air passages extending from a hot air inlet region of the plate fin core to a hot air outlet region of the plate fin core and a set of cool air passages extending from a cool air inlet region of the plate fin core to a cool air outlet region of the plate fin core. The plate fin heat exchanger further includes a mounting flange circumscribing the cool air outlet region. ... Hamilton Sundstrand Corporation

02/12/15 / #20150041108

Cold corner flow baffle

A heat exchange system includes a cold fluid circuit and a hot fluid circuit. The cold fluid circuit routes a cold fluid to a ram air inlet. ... Hamilton Sundstrand Corporation

02/12/15 / #20150041105

Reduced thermal expansion closure bars for a heat exchanger

A plate fin heat exchanger is configured to receive hot flow from a hot source and cool flow from a cool source. The plate fin heat exchanger includes a plurality of plates arranged in parallel to define a plurality of flow passages there between, and a set of closure bars arranged at a first side of the plurality of plates to seal a first set of the flow passages against ingress of the hot flow, thereby directing the hot flow into a second set of the flow passages. ... Hamilton Sundstrand Corporation

02/12/15 / #20150040984

Dual heat exchanger fuel tank inerting system

A fuel tank inerting system includes a bleed air inlet, a bleed air conditioning system, an air separation module, a nitrogen-enriched air conditioning system, a nitrogen-enriched air outlet, and a controller. The bleed air conditioning system is connected to the bleed air inlet and is configured to cool bleed air. ... Hamilton Sundstrand Corporation

02/05/15 / #20150037155

Fan rotor piloting

A fan rotor has a plurality of blades arranged circumferentially about a central axis, wherein the plurality of blades extend between 2.9980 and 3.0020 inches radially from the central axis. The fan rotor has a root portion arranged radially inward from the plurality of blades. ... Hamilton Sundstrand Corporation

02/05/15 / #20150037138

Thrust shaft for ram air fan

A thrust shaft contains a shaft body having a disk at one axial end to provide a rotating surface in a thrust bearing, the disk having a first side and an opposite second side. The thrust shaft also contains a first section extending from the first side of the disk, the first section cylindrical in shape and having eleven holes uniformly spaced circumferentially about the first section, the holes being substantially axially equidistant from the first side of the disk. ... Hamilton Sundstrand Corporation

02/05/15 / #20150035501

Systems and methods for controlling torsional oscillation in wound field synchronous generator machines

A method for controlling torsional oscillation includes detecting angular position of a wound field synchronous generator machine, extracting information indicative of torsional oscillation, selecting synchronous torsional oscillations, compensating for the synchronous torsional oscillations with an exciter signal, and controlling field current in the wound field synchronous generator using the exciter signal. A damping controller includes a damping module with a synchronous selective compensator and a synchronous notch filter for generating torsional oscillation compensation signals for asynchronous torsional oscillation.. ... Hamilton Sundstrand Corporation

02/05/15 / #20150035469

Sensing pm electrical machine position

An electrical machine includes a stator having a stator winding and a secondary transformer coil. A rotor is operatively connected to rotate relative to the stator, wherein the rotor includes a plurality of embedded permanent magnets. ... Hamilton Sundstrand Corporation

02/05/15 / #20150035392

Liquid cooled motor for cabin air compressor

A method of manufacturing a nonconductive liquid cooled back iron heat exchanger to house a conductive cooling liquid is disclosed. This method may include forming layers of material via additive manufacturing to create channels for transporting cooling liquid. ... Hamilton Sundstrand Corporation

02/05/15 / #20150034285

High-pressure plate heat exchanger

A heat exchanger plate has multiple structures thereon. A heat transfer portion has a plurality of ribs arranged in a rib pattern. ... Hamilton Sundstrand Corporation

02/05/15 / #20150034280

Header for electronic cooler

A fluid cooler packet for a plurality of electronic components has a plurality of individual cooling circuits for receiving a supply of cooling fluid from a supply header and delivering that cooling fluid to an associated electronic component. The plurality of cooling circuits each includes a return passage for receiving a return fluid after having cooled the associated electronic component, and returns the return fluid to a return header. ... Hamilton Sundstrand Corporation

02/05/15 / #20150034278

Heat pipe matrix for electronics cooling

A heat pipe system and methods of arranging a heat pipe system are provided. The heat pipe system includes a plurality of heat pipes, with each of the plurality of heat pipes including a hot end thermally coupled to a heat source and a cold end thermally coupled to a heat sink the plurality of heat pipes include a first pair of heat pipes. ... Hamilton Sundstrand Corporation

02/05/15 / #20150034203

Bearing cooling control in an air cycle machine

An air cycle machine has a housing which holds a compressor section, and a turbine section having an expansion area, and a fan section disposed outside of the housing. A shaft, which attaches to and is coaxial with the compressor section, the turbine section and the fan section, is supported by an air journal bearing and an air thrust bearing. ... Hamilton Sundstrand Corporation

02/05/15 / #20150033730

Compressor housing for an air cycle machine

A component of an air cycle machine includes a fan housing portion, a compressor housing portion, a main bore housing radius, a static seal radius, a shroud pilot housing radius, and an insulator seal plate housing radius. The fan housing portion includes a shroud for a fan section. ... Hamilton Sundstrand Corporation

01/29/15 / #20150031172

Method for interconnection of components on a substrate

A method is described for interconnecting first, 27, and second, 22, components on a substrate, 21. The method comprises attaching said first component, 27, to said substrate, attaching said second component, 22, to said substrate, 21, said first and second components being positioned relative to each other on said substrate to form a gap, 31, therebetween. ... Hamilton Sundstrand Corporation

01/29/15 / #20150029665

Cooling fluid flow passage matrix for electronics cooling

A cooling supply package for an electronic component has a supply port communicating with a plurality of outer supply channels, and a return port communicating with a plurality of outer return channels. The outer supply channels and outer return channels communicate with distinct ones of openings in a slot layer and into return and supply slots, respectively. ... Hamilton Sundstrand Corporation

01/29/15 / #20150029618

Non-transformer isolated dc-dc power supply including shut down circuit

A direct current-to-direct current (dc-dc) power supply includes a voltage converter module that converts an input voltage having a first voltage level into an output voltage having a second voltage level that is less than the first voltage level. An over-voltage detection module receives the second voltage and generates an over-voltage signal indicating an over-voltage condition of the dc-dc power supply. ... Hamilton Sundstrand Corporation

01/29/15 / #20150028221

Methods of ion source fabrication

A method of ion source fabrication for a mass spectrometer includes simultaneously forming aligned component portions of an ion source using direct metal laser fusing of sequential layers. The method can further include forming the component portions on a base plate made from a ceramic material by applying fused powder to the base plate to build the component portions thereon.. ... Hamilton Sundstrand Corporation

01/29/15 / #20150027906

Solid polymer electrolyte ammonia sensor

An ammonia sensor that includes an ionic liquid impregnated sensing electrode (anode) and a cathode separated by a membrane. During operation, in the presence of ammonia, the anode and cathode generate current manifesting the electrochemical reaction of ammonia in the sensing electrode. ... Hamilton Sundstrand Corporation

01/29/15 / #20150027669

Heat exchanger with embedded heat pipes

A heat exchanger is disclosed which includes a plurality of heat exchanger plates. Each plate has a plurality of hollowed out pins arranged in a pin fin pattern. ... Hamilton Sundstrand Corporation

01/29/15 / #20150027568

Air purging pressure regulating valve

A valve housing receives a spool and the spool has a regulating chamber selectively communicating a supply line to a return line. The spool is biased in one direction by a spring force and there is a second force biasing the spool in an opposed direction with the second bias force being provided by a fluid pressure within a hydraulic system associated with the pressure regulating valve. ... Hamilton Sundstrand Corporation

01/29/15 / #20150027251

Electro-mechanical actuators with integrated high resolution wide operating load range

An electro-mechanical actuator with wide operating range load includes a shaft and a speed summed differential coupled to rotate the shaft. A prime mover is coupled to the speed summed differential and is configured to react to an output torque of the screw shaft. ... Hamilton Sundstrand Corporation

01/22/15 / #20150023787

Air cycle machine compressor diffuser

A diffuser for an air cycle machine defines airflow both to a compressor rotor from the inlet and from the compressor rotor through a plurality of vanes that define radially extending airflow passages. The size and shape of both the inlet and the vanes of the diffuser define and tailor the character of airflow presented to and leaving the compressor rotor to provide a desired change in air flow.. ... Hamilton Sundstrand Corporation

01/22/15 / #20150023776

Fluid cooling arrangement for a gas turbine engine and method

A fluid cooling arrangement in a gas turbine engine for aerospace propulsion includes an inner structure. Also included is an outer structure disposed radially outwardly of the inner structure, the outer structure and the inner structure defining a bypass flow path. ... Hamilton Sundstrand Corporation

01/15/15 / #20150014569

Coating arrangement for sliding actuator assembly and method

A coated valve assembly includes a sleeve having a sleeve outer surface and a sleeve inner surface. Also included is a spool having a spool outer surface. ... Hamilton Sundstrand Corporation

01/15/15 / #20150013587

Safety pin system

A safety pin system for a product is provided and includes a safety pin disposable in a receiving element to disable the product, an obstruction disposable in a blocking position of a product disability indicator and a streamer configured to pass through an opening associated with the product and attached at opposite ends thereof to the safety pin and the obstruction. The opening and the obstruction are sized such that, when the obstruction is disposed in the blocking position with the streamer passed through the opening and the safety pin disposed in the receiving element, the obstruction is irremovable from the blocking position until the safety pin is removed from the receiving element.. ... Hamilton Sundstrand Corporation

01/08/15 / #20150008772

Integrated gas turbine engine accessories

An permanent magnet alternator stator assembly for an integrated air turbine starter and permanent magnet alternator assembly has a permanent magnet alternator stator winding assembly attached to a mounting structure. A quick electrical connector electrically connects to the stator winding assembly and is attached to the mounting structure. ... Hamilton Sundstrand Corporation

01/08/15 / #20150007969

Heat exchangers with multi-layer structures

A heat exchanger includes a pair of opposed, spaced apart heat exchanger plates defining a heat exchanger volume therebetween having an inlet and opposed outlet. A plurality of heat exchanger ribs are included within the heat exchanger volume. ... Hamilton Sundstrand Corporation

01/01/15 / #20150004011

Enhanced motor cooling system and method

An environmental control system (ecs) for an aircraft includes a ram air system having a ram inlet and a ram outlet. The ecs includes a cabin air compressor motor, a diverter valve, and a dedicated outlet. ... Hamilton Sundstrand Corporation

01/01/15 / #20150003930

Fastening system including removable stud and retaining plate

A fastening system includes a removable stud and a retaining plate. The removable stud includes a threaded portion configured to be removably threaded into a threaded bore of a housing, a shank portion arranged coaxially with the threaded portion and configured to be inserted through a bore of a housing of a line replaceable component, and an anti-rotation portion disposed between the threaded portion and the shank portion. ... Hamilton Sundstrand Corporation

01/01/15 / #20150003031

Vertically mounted capacitor assembly

A capacitor assembly comprises a plurality of capacitor elements, a clamping assembly, and a conductive path. The clamping assembly retains the plurality of capacitor elements longitudinally perpendicular to an adjacent mounting surface. ... Hamilton Sundstrand Corporation

01/01/15 / #20150002975

Solid state circuit-breaker switch devices

A solid state circuit-breaker switch has a first solid state switch coupled to a positive terminal of a high voltage source, a second solid state switch coupled to a return terminal of the high voltage source, and a diode connected between the switches. A load is coupled between the switches and in parallel with the diode such that voltage transients across the load are limited during turn of conditions. ... Hamilton Sundstrand Corporation

01/01/15 / #20150002245

Resonance based cable compensation

A system for resonance based cable compensation includes a first switch with a first terminal for connecting a first connection of a cable having a resonant circuit on an end of the cable opposite the first switch. The system also includes a second terminal for connecting a second connection of a cable that has its first connection connected to the first terminal. ... Hamilton Sundstrand Corporation

01/01/15 / #20150000961

Pwb cooling system with heat dissipation through posts

An apparatus includes a printed wiring board, a post that supports the printed wiring board, and a heat pipe on the printed wiring board with a first end positioned near an electronic component attached to the printed wiring board and a second end positioned near the post.. . ... Hamilton Sundstrand Corporation

01/01/15 / #20150000874

Fuel oil heat exchanger utilizing heat pipes

A heat exchanger includes a heat exchanger housing having a first flow path with a first inlet and a first outlet, and having a second flow path with a second inlet and a second outlet. A first fluid flows from the first inlet to the first outlet in the first flow path, and a second fluid flows from the second inlet to the second outlet in the second flow path. ... Hamilton Sundstrand Corporation

01/01/15 / #20150000871

Housing with heat pipes integrated into enclosure fins

A device with increased heat dissipation abilities for supporting printed wiring boards includes a chassis for holding printed wiring boards, a plurality of fins attached to the chassis, and a heat pipe in each of the plurality of fins that is capable of transferring heat from the chassis to the surrounding ambient by absorbing heat from the chassis at a first end of the heat pipe and releasing the heat into the ambient at a second end of the heat pipe.. . ... Hamilton Sundstrand Corporation

01/01/15 / #20150000752

Fluid pressure regulating system

A fluid pressure regulating system includes an auxiliary fluid circuit having a high pressure region and a low pressure region, a pump connected to the auxiliary fluid circuit and configured to discharge fluid into the high pressure region of the auxiliary fluid circuit, and a check valve connecting the high pressure region of the auxiliary fluid circuit to a main fluid interface line. The fluid pressure regulating system also includes a pressure regulating valve connecting the high pressure region of the auxiliary fluid circuit and the low pressure region of the auxiliary fluid circuit. ... Hamilton Sundstrand Corporation








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