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Littelfuse Inc patents

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

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "L" | Littelfuse Inc-related inventors

Electromagnetic interference suppression device and manufacturing same

A method for manufacturing an EMI suppression device includes formulating a dielectric material from a polymer composite material that includes a thermoplastic resin /thermosetting resin and a conductive filler. A sheet that comprises the polymer composite filler is prepared. The top surface of the sheet is then laminated with a... Littelfuse Inc

Zero sequence sensing apparatus and method

Zero sequence current sensors for single-phase and multiphase power systems are disclosed. In one implementation, a zero sequence current sensor is positioned between conductors associated with a single-phase power system or a multiphase power system. The current sensor may be shaped to accommodate maintaining a substantially equal distance between the... Littelfuse Inc

Non-arcing fuse

An arc-mitigating fuse including a tubular fuse body, a first endcap covering a first end of the fuse body and a second endcap covering a second end of the fuse body, a fusible element disposed within the fuse body and extending between the first endcap and the second endcap to... Littelfuse Inc

Adhesive positive temperature coefficient material

Positive temperature coefficient (PTC) devices and methods to manufacture PTC devices are disclosed. A PTC device or apparatus may include a grafted polymer. Furthermore, the PTC device may include a conductive filler included in the polymer material. The PTC device may include at least one conductive layer dispose over a... Littelfuse Inc

Fuse and forming a fuse

Embodiments of the fuse include a fuse body having a first end and a second end. A fuse element is disposed within a cavity of the fuse body, an end of the fuse element extending beyond an edge of the fuse body. An arc disc is disposed on the edge... Littelfuse Inc

Flexible positive temperature coefficient device with battery management system

An electronic device including a protected component, a flexible positive temperature coefficient (PTC) device including a flexible sheet of PTC material coupled to a surface of the protected component, the flexible PTC device electrically connected to the protected component and adapted to arrest or mitigate electrical current flowing through the... Littelfuse Inc

Methods for manufacturing an insulated busbar

A method for manufacturing an insulated conductive material, the method including providing a wire, applying a masking material to one or more regions of the wire, coating regions of the wire other than the one or more regions with an insulating material by, electrically charging the wire with a first... Littelfuse Inc

Flexible positive temperature coefficient sheet and making the same

A flexible sheet of positive temperature coefficient (PTC) material formed of a polymer resin and a conductive filler, the sheet of PTC material having a thickness in a range of 10 μm to 100 μm. A method for forming the flexible sheet of positive temperature coefficient material may include preparing... Littelfuse Inc

Hollow fuse body with trench

Provided herein are protection devices, such as fuses, including a set of trenches or pockets for retention of solder therein. In some embodiments, a fuse includes a body including a center portion extending between a first and second end portions. The first end portion includes a first trench formed in... Littelfuse Inc

Semiconductor device having side-diffused trench plug

A semiconductor device structure may include a substrate having a substrate base comprising a first dopant type; a semiconductor layer disposed on a surface of the substrate base, the semiconductor layer comprising a second dopant type and having an upper surface; and a semiconductor plug assembly comprising a semiconductor plug... Littelfuse Inc

Igbt having improved clamp arrangement

In one embodiment, an insulated gate bipolar transistor (IGBT) device may include an NMOS portion and a PNP portion, where the PNP portion is coupled to the NMOS portion. The PNP portion may include a base and a collector. The IGBT may further include a flyback clamp, where the flyback... Littelfuse Inc

Mechanical disconnect switch with integrated fuse protection

A circuit protection assembly (CPA) is disposed between a source of power and a circuit to be protected. The CPA comprises a mounting block having a bore extending therethrough and a recess cavity on a first surface of the mounting block. A post having a first end is disposed within... Littelfuse Inc

Transient suppressing circuit arrangements

Transient suppression circuit arrangements are disclosed. In one implementation of a transient suppression circuit, at least one avalanche diode is coupled in series with a DIAC, a silicon diode for alternating current (SIDAC) device or SIDACtor.... Littelfuse Inc

Hollow fuse body with notched ends

Hollow bodies and hollow body fuses are disclosed. Furthermore, methods to provide hollow bodies and hollow body fuses are disclosed. In one implementation, a hollow body includes a center portion and an end portion. An endcap may be coupled to the end portion. A cavity is formed between an inside... Littelfuse Inc

Structurally resilient positive temperature coefficient material and making same

Structurally supported positive temperature coefficient (PTC) materials are disclosed. Furthermore, methods to provide structurally supported PTC materials are disclosed. In one implementation, a structurally supported PTC material includes a support structure that is at least partially covered by a PTC material. In one example, the support structure is a mesh... Littelfuse Inc

Relay for use with multiple power sources

Provided herein is a relay architecture for selecting between multiple power sources. In one approach, a first relay and first power source are electrically coupled to a first terminal. A second relay and second power source are electrically coupleable to a second terminal and to the first relay. A load... Littelfuse Inc

Methods for manufacturing an insulated busbar

A method for manufacturing an insulated conductive material includes applying a masking material to one or more regions of a conductive material. Regions of the conductive material other than the masked regions are coated. The regions are coated by electrically charging the conductive material with a first charge polarity, providing... Littelfuse Inc

Relay protection system

Provided herein are improved relay protection systems that can detect a short to ground condition on an output of a relay. A relay protection system can bias an output of the relay. The output of the relay can be monitored to determine if a bias level reduces below a predetermined... Littelfuse Inc

Ultrathin positive temperature coefficient sheet and making same

A method for manufacturing a sheet of positive temperature coefficient (PTC) material includes providing a PTC material, grinding the PTC material into a powder, and inserting the ground PTC material into a press. The ground PTC material is compressed within the press until the PTC material defines a planar shape.... Littelfuse Inc

High voltage electronic device and method associated therewith

An electronic device including a substrate, a semiconductor element disposed on the substrate, and a plurality of guard rings at least partially surrounding the semiconductor element, wherein adjacent guard rings are spaced apart by a substantially uniform distance as measured along an entire length of the guard rings, and at... Littelfuse Inc

Magnetic sensor system

Provided herein are improved magnetic sensor systems for use in linear measurement systems. A magnetic sensor can be positioned offset from a center line positioned between two magnets. The two magnets can be oriented so as to provide opposite polarities. As the magnetic sensor traverses a path parallel to the... Littelfuse Inc

Multiple current sensor system

Provided herein are improved current monitoring systems for monitoring currents having large ranges. A current monitor can include two or more current sensors. At least two of the current sensors can have different current measurement ranges and different current measurement sensitivities. Each current sensor can be associated with one or... Littelfuse Inc

Arc suppression connector

A circuit includes a connector having first and second mateable portions. Each portion includes at least two terminals configured to mechanically engage at least two terminals of the other portion. The two terminals within the first and second portions are arranged so that as the first and second portions are... Littelfuse Inc

Method and protecting a polarity sensitive load

Provided herein are improved apparatuses and methods for protecting polarity sensitive loads in DC power circuits that include a power source, a relay coupled to the power source, and a polarity sensitive load coupled to the relay. A diode can be coupled between the power source and the relay. When... Littelfuse Inc

High-current fuse with endbell assembly

A fuse includes a fuse element and a fuse body. A portion of the fuse element is housed in a fuse body. The fuse element includes a first terminal and a second terminal disposed outside of the fuse body. The first terminal and the second terminal electrically connects the fuse... Littelfuse Inc

High current one-piece fuse element and split body

A compact, high breaking capacity fuse that includes a top and bottom insulative layer and a single piece fusible element disposed between the top and bottom insulative layer. The top and bottom insulative layers include cavities that are aligned at assembly to form a chamber in which a fusible element... Littelfuse Inc

Surface mounted protection device

Approaches herein provided surface mounted devices each configured as a stand-alone component suitable for attachment to a substrate such as a printed circuit board (PCB). In some embodiments, a method includes forming a base housing, coupling an electronic component to the base housing, and forming a cover over the electronic... Littelfuse Inc

Low-current fuse stamping method

A convenient, cost-effective method for manufacturing low-current fuse elements. The method may include the steps of stamping a substrate out of a sheet of material and stamping at least one hole in the substrate. The method may further include the steps of bonding a layer of fuse material to a... Littelfuse Inc

Detecting movement of a seatbelt sensor

Provided herein are approaches for detecting movement of a seatbelt sensor. In some approaches, a detector includes a sensor housing coupled to a plate of a vehicle restraint system, and a sensor disposed within the sensor housing, wherein the sensor is operable to sense a position of a magnet in... Littelfuse Inc

Thermal metal oxide varistor circuit protection device

Exemplary embodiments of the present invention are directed to a circuit protection device, A circuit protection device may comprise a housing defining a cavity and a metal oxide varistor (MOV) disposed within the cavity. The circuit protection device may further comprise a first terminal electrically attached at a first end... Littelfuse Inc

Methods for manufacturing an insulated busbar

A method for manufacturing an insulated conductive material includes providing a continuous feed of a conductive material, a first continuous feed of insulating material above a top surface of the conductive strip, and a second continuous feed of insulating material below a bottom surface of the conductive strip. Portions of... Littelfuse Inc

Sealed modular power distribution apparatus

Provided are approaches for modularized power distribution. In one approach, an apparatus may include a module extending into an interior cavity of a housing assembly through an opening formed in a base section of the housing assembly. The module may include a component grid at one end for receiving one... Littelfuse Inc

Power distribution housing

A power distribution housing including a base, a cover adapted to fit onto the base, a latch member adapted to removably secure the cover to the base, the latch member having a first end pivotably connected to the base and a second end having a latch detent extending therefrom, the... Littelfuse Inc

Fuse with insulated plugs

An improved fuse including a fuse body formed of an electrically insulative material. The fuse body defines a cavity which extends from a first end of the fuse body to a second end of the fuse body. A fusible element is disposed within the cavity and extends from a first... Littelfuse Inc

Circuit protection assembly

A circuit protection assembly can include a conductive assembly post that supports a first conductive element, a non-conductive isolator, a second conductive element, a fuse, and a fastener. The first and second conductive elements can be positioned in close proximity to one another below the fuse. A first portion of... Littelfuse Inc

01/19/17 / #20170018917

Apparatus for detecting arc flash

An apparatus may include a sensor housing, a light sensor disposed within the sensor housing, the light sensor arranged to generate a detection signal when light impinges on the light sensor, a sensor lens disposed at least partially outside the sensor housing, wherein a distal portion of the sensor lens... Littelfuse Inc

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This listing is an abstract for educational and research purposes is only meant as a recent sample of applications filed, not a comprehensive history. is not affiliated or associated with Littelfuse Inc in any way and there may be associated servicemarks. This data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Littelfuse Inc with additional patents listed. Browse our Agent directory for other possible listings. Page by