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Kabushiki Kaisha Bridgestone
Kabushiki Kaisha Bridgestone Corporation
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Kabushiki Kaisha Bridgestone patents


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

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 new patent  Vinyl modifier composition and processes for utilizing such composition

An oxolanyl compound-containing composition comprising specified amounts of the meso-isomer of one or more of the oxolanyl compounds of specified structure is provided. Also provided are methods for the use of such compositions as vinyl content modifiers in polymerization processes.. ... Kabushiki Kaisha Bridgestone

 new patent  Rubber composition, laminate and conveyor belt

Provided is a rubber composition having excellent adhesiveness with reinforcing members, particularly reinforcing members in environmental degradation. The rubber composition is obtainable by compounding a rubber component containing a diene based rubber, a phenol based resin and a carbon black, wherein: a compounding amount of the phenol based resin is 3 parts by mass or more per 100 parts by mass of the diene based rubber.. ... Kabushiki Kaisha Bridgestone

 new patent  Elastic crawler and elastic crawler driving mechanism

The elastic crawler according to this disclosure is an elastic crawler comprising on an inner circumferential side a plurality of engaging portions (14) respectively engageable with a plurality of pin members (22) arranged at a spacing in a circumferential direction of a sprocket, wherein: the engaging portions (14) have a pressure receiving surface (14a) which receives the pin members (22), an outline shape in side view of the pressure receiving surface (14a) being formed by an envelope l1 drawn by an outer end of the pin members (22) when the sprocket rolls coaxially with a central axis of a virtual rotor with a rolling diameter d1 as defined in d1=(pitch of the engaging portions)×(number of pin members)/(π)×a, and 0.9≤a<1, together with the virtual rotor on a plane.. . ... Kabushiki Kaisha Bridgestone

 new patent  Reinforcement member for tires, and tire using same

Provided are: a tire reinforcement member capable of improving the tire durability than before; and a tire using the same. The present invention provides a tire reinforcement member 1 including: a core material cord layer 2; and a spiral cord layer 3 spirally wound on the core material cord layer 2, wherein cords in the core material cord layer 2 are metal cords 2a having an inclination angle of 40° to 90° with respect to the longitudinal direction of the core material cord layer 2, and reinforcing cords 3a in the spiral cord layer 3 are organic fiber cords having a modulus of not less than 19 gpa.. ... Kabushiki Kaisha Bridgestone

 new patent  Pneumatic tire having reinforcing members and air barrier layer

A method of preparing a tire including the steps of: providing a cured tire, the tire including a first bead, a second bead, a carcass layer extending from the first bead to the second bead, and an optional innerliner layer disposed interior to the carcass layer; applying a pair of reinforcing members to the carcass layer or to the optional innerliner layer, if present; and applying an air barrier composition to the pair of reinforcing members, and to a portion of the carcass layer or to a portion of the optional innerliner layer to thereby form an air barrier layer.. . ... Kabushiki Kaisha Bridgestone

 new patent  Pneumatic tire and method for manufacturing the same

In a pneumatic tire, respective end portions in the tire circumferential direction of a composite layer of an inner liner and a rubber layer are jointed at a joint portion; the lower inner liner layer has a first edge and the upper inner liner layer has a second edge at the joint portion; the first edge is separated from the upper inner liner layer by the rubber layer; provided that a position on the upper inner liner layer at the same height as the lower inner liner layer and closest to the first edge is “p”, a circumferential distance measured from the first edge to the position p is “l”, and a circumferential distance measured from the second edge to the position p is “t”, t≤35 mm, t−l/2≥9 mm, and 0×t<l≤0.2×t.. . ... Kabushiki Kaisha Bridgestone

 new patent  Tire curing bladder with an air barrier layer

A method of manufacturing a tire curing bladder, the method includes the steps of (i) providing a cured tire curing bladder; and (ii) applying an air barrier composition to the cured tire curing bladder to form an air barrier layer. A method of restoring the air retention of a tire curing bladder, the method includes the steps of (i) providing a used tire curing bladder; and (ii) applying an air barrier composition to the used tire curing bladder to form an air barrier layer.. ... Kabushiki Kaisha Bridgestone

 new patent  Tire having component with release coated surface and related processes

Disclosed herein are a tire comprising at least one component having a surface coated with a liquid release layer, a process for preparing a tire having at least one component with a surface coated with a release layer, and a cured tire comprising a tire body at least one component with a surface coated with a release layer. The release layer comprises at least one silicone rubber and at least one adhesive polymer which may be present in latex form in the liquid release layer.. ... Kabushiki Kaisha Bridgestone

 new patent  Rubber article mold and method for manufacturing rubber article mold

A rubber article mold capable of discharging air from a molding-surface side to a back-surface side during curing while restraining entry of rubber into an air vent hole and a method for producing such a rubber article mold are provided. The rubber article mold including portions for discharging air from a molding-surface side to a back-surface side, including a hole penetrating from a molding surface to a back surface of the mold and a valve member within the hole to provide a predetermined clearance between the valve member and a hole wall forming the hole. ... Kabushiki Kaisha Bridgestone

 new patent  Golf club head with grooves shallower than scorelines and groove pitch and length

A golf club head according to this invention is a wood type golf club head including a face portion, a crown portion, and a sole portion. A plurality of grooves are formed in the face portion. ... Kabushiki Kaisha Bridgestone

 new patent  Multi-piece solid golf ball

In a multi-piece solid golf ball having a rubber two-layer core consisting of an inner layer and an outer layer, a cover, and at least one intermediate layer therebetween, the inner core layer has a diameter of at least 22 mm, the difference in jis-c hardness between the center of the inner core layer and the surface of the outer core layer is at least 25, the ball satisfies the relationship a/b≤2.0, where a and b are the deflections of, respectively, the inner core layer and the two-layer core when compressed under specific loading conditions, and the intermediate layer has a higher material hardness than the cover, and the core hardness profile are optimized by the specific conditions. This ball enables mid- to high-level golfers both to achieve even longer distances and to maintain the spin performance on approach shots at a high level.. ... Kabushiki Kaisha Bridgestone

 new patent  Golf ball

In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball g having a core 1, a cover 3 and an intermediate layer 2 therebetween wherein, letting hc be the jis-c hardness at a center of the core, h12 be the jis-c hardness at a position 12 mm from the core center and ho be the jis-c hardness at a surface of the core, the core has a hardness profile which satisfies the condition (ho−h12)−(h12−hc)≥10; letting (ho−h12)−(h12−hc) above be a, the spin index of the ball, defined as the dynamic coefficient of friction of the ball multiplied by a, is at least 3.0; and the hardness profile index, defined as the deflection (mm) of the core when compressed under a final load of 1,275 n (130 kgf) from an initial load of 98 n (10 kgf) multiplied by a, is at least 40.. . ... Kabushiki Kaisha Bridgestone

 new patent  Seat pad

Provided is a seat pad (10) having a placing surface (11), wherein a lateral slit section (15) extending from an outer side toward an inner side of the seat pad (10) is formed in a first lateral direction (b1) along the placing surface (11), and at least a portion of the lateral slit section (15) gradually becomes smaller in a thickness direction (h) perpendicular to the placing surface (11) from the outer side toward the inner side of the seat pad (10) in the first lateral direction (b1).. . ... Kabushiki Kaisha Bridgestone

Bridgestone Corporation

. . ... Kabushiki Kaisha Bridgestone

05/10/18 / #20180128343

Vibration damping device

According to the present invention, there is provided a vibration damping device (10) including a first bracket (11) and a second bracket (12), a first attachment member (14), a second attachment member (15), and an elastic body (16). The second attachment member (15) includes an insertion cylinder portion (22) in which the second bracket (12) is inserted. ... Kabushiki Kaisha Bridgestone

05/10/18 / #20180126808

Method for determining concentric mounting of a tire on a wheel

Method for determining concentric mounting of a tire on a wheel. In one embodiment, method for determining concentric mounting of a tire on a wheel comprises: providing a tire including at least one bead area, wherein at least one rim centering tolerance indicator is oriented in the at least one bead area, and wherein the at least one rim centering tolerance indicator extends circumferentially about the tire; mounting the tire on a wheel to form a tire-wheel assembly, the wheel includes a circular cross-section including a center point; rotatably mounting the tire-wheel assembly on a tire balancing machine; providing a light source adjacent to the tire-wheel assembly, the light source projects a projected reference point upon the at least one bead area; rotating the tire-wheel assembly; and observing the runout of the projected reference point relative to the at least one rim centering tolerance indicator.. ... Kabushiki Kaisha Bridgestone

05/10/18 / #20180126801

Heavy load pneumatic radial tire

A tire includes a carcass, and a wire chafer disposed on an outer circumference of the carcass. A reinforcement rubber layer having a lower elastic modulus than that of a coating rubber included in the carcass and/or that of a coating rubber included in the wire chafer, is arranged between the carcass and the wire chafer. ... Kabushiki Kaisha Bridgestone

05/10/18 / #20180126795

Tire

A tire including a decorative patterned portion that is formed on a tire surface, and that is configured including plural first projections extending in a first direction in plan view and arranged spaced apart from each other in a second direction orthogonal to the first direction, and plural second projections arranged between neighboring first projections and arranged spaced apart from each other in the first direction. In plan view, each of the second projections includes a bend portion and plural extension portions extending from the bend portion.. ... Kabushiki Kaisha Bridgestone

05/10/18 / #20180126794

Pneumatic tire

By forming a ground contact edge side of lug grooves such that the groove depth becomes shallower in groove depth from the tire equatorial plane side toward the ground contact edge, and by setting an average angle of inclination formed between a tread face and a groove bottom to be not more than 5°, water expulsion is performed smoothly in the vicinity of the ground contact edge while securing the rigidity of land portions in the vicinity of the ground contact edge. This enables a high degree of both wet performance and dry performance to be achieved.. ... Kabushiki Kaisha Bridgestone

05/10/18 / #20180126792

Pneumatic tire

Taking a groove side-wall to a position at ½ a groove depth from a tread face of lug groove as a tread-in side first inclined portion, and taking a groove side-wall from the position at ½ groove depth to a groove bottom as a tread-in side second inclined portion, then the following a1 is set less than the following b1. When viewed in cross-section orthogonal to a length direction of the lug groove: a1 is an area of a region enclosed by an imaginary line passing through an end portion on a tread face side of the tread-in side first inclined portion and perpendicular to the tread face, by an imaginary line passing through an end portion on a groove bottom side of the tread-in side first inclined portion and orthogonal to the imaginary line, and by the tread-in side first inclined portion; and b1 is an area of a region enclosed by an imaginary line passing through an end portion on a tread face side of the tread-in side second inclined portion and perpendicular to the tread face, by an imaginary line passing through the deepest portion of the lug groove and parallel to the tread face, and by the tread-in side second inclined portion.. ... Kabushiki Kaisha Bridgestone

05/10/18 / #20180126787

Pneumatic tire

Provided is a pneumatic tire for preventing the occurrence of premature wear at tire width direction edge portions due to the use of an endless inclined belt. The pneumatic tire includes two or more layers of inclined belts formed by winding rubber strips s each composed of a plurality of paralleled and rubber coated cords in a direction inclined with respect to the tire circumferential direction while folding back the rubber strips at both width direction ends. ... Kabushiki Kaisha Bridgestone

05/10/18 / #20180126224

Golf ball and method of manufacture

The invention provides a golf ball having a core and a cover of one or more layer encasing the core, wherein the core is formed of a rubber composition that includes a base rubber, a co-crosslinking agent and an organic peroxide. The core has a center portion and a surface portion that are unfoamed regions, and has an intermediate portion that contains a foamed region. ... Kabushiki Kaisha Bridgestone

05/03/18 / #20180117971

Pneumatic tire

In the pneumatic tire according to this disclosure, a plurality of sipes on a tread surface include a large intermediate width sipe 4 having: a pair of intermediate sipe wall surface portions 61, a pair of bottom-side sipe wall surface portions 62 and a pair of tread-surface-side sipe wall surface portions 63; and within a central region of the tread surface, a spacing along a tire circumferential direction between the large intermediate width sipe and another sipe or groove is 2.0 to 4.0 times of a sipe depth d of the large intermediate width sipe.. . ... Kabushiki Kaisha Bridgestone

05/03/18 / #20180117967

Rubber composition and tire

The rubber composition of this disclosure is a rubber composition comprising a rubber component containing 2 or more polymer components and a filler containing at least a silica, wherein: the rubber component is separated into two or more polymer phases with different peak temperatures of tan δ temperature dispersion curve; a compounding amount of the filler per 100 parts by mass of the rubber component is 30 to 130 parts by mass; 30 mass % or more of the filler exists in the polymer phase with the lowest peak temperature of tan δ temperature dispersion curve; and the filler has an average aggregate area of 2100 nm2 or less.. . ... Kabushiki Kaisha Bridgestone

05/03/18 / #20180117865

Tire structure for externally mounted device

A tire includes a first side and a second side, and a tread portion extending between the first side and the second side. The first side includes external geometry having at least one rib surrounding a recess, without extending into the recess. ... Kabushiki Kaisha Bridgestone

04/19/18 / #20180106324

Anti-vibration device

An anti-vibration device (1) includes a tubular first attachment member (10), a second attachment member (20), an elastic body (70), and a separating member (50) that separates a liquid chamber in the first attachment member into a main liquid chamber (80) and a secondary liquid chamber (90). A tapered surface (502) decreasing in diameter towards another side in the axial direction is formed on an end on the other side in the axial direction of an outer circumferential surface of the separating member, a bend portion (101) bent to follow the tapered surface is formed on an end on the other side in the axial direction of the first attachment member, and an end (301) on the outer circumferential side of a diaphragm (30) is sandwiched between the tapered surface and the bend portion.. ... Kabushiki Kaisha Bridgestone

04/05/18 / #provided is a motorcycle tire whose wear resistance and drainage performance are improved by refining the tread pattern.

Bridgestone Corporation

. . ... Kabushiki Kaisha Bridgestone

04/05/18 / #20180094124

Rubber composition and tire containing rubber composition

Provided is a rubber composition including a rubber component. The rubber component contains at least a polymer that is a synthesized polyisoprene or an isoprene copolymer and that has 20% or less gel fraction.. ... Kabushiki Kaisha Bridgestone

04/05/18 / #20180093139

Golf ball

The invention provides a golf ball having a core and a cover of one layer or a plurality of layers, the core being formed of a material molded under heat from a rubber composition containing: (a) a base rubber, (b) an organic peroxide, and (c) water and/or a metal monocarboxylate. The core has a hardness profile which satisfies specific relationships between the jis-c hardness at the core center (cc), the jis-c hardness at a position 10 mm from the core center (c10) and the jis-c hardness at the core surface (cs).. ... Kabushiki Kaisha Bridgestone

03/29/18 / #20180086147

Run-flat tire

A run-flat tire that includes a tread portion, sidewall portions, and bead portions. The sidewall portions being provided with a side-reinforcing rubber having a crescent-shaped cross section. ... Kabushiki Kaisha Bridgestone

03/29/18 / #20180086145

Motorcycle tire

A motorcycle tire whose wear resistance and drainage performance are improved by refining the tread pattern, including: a tread section; side wall sections and bead sections that continuously extend on both sides of the tread section, and the rotation direction of the tire when fitted to a motorcycle is designated. At least two inclined main grooves inclined with respect to the tire circumferential direction and at least two shallow grooves are arranged on the surface of the tread section and, when, among the at least two inclined main grooves, the one whose tire width direction inner end is closest to the tire equatorial plane is defined as a first inclined main groove, the at least two shallow grooves include: a center-side shallow groove and a shoulder-side shallow groove.. ... Kabushiki Kaisha Bridgestone

03/29/18 / #20180086142

Non-pneumatic tire

A non-pneumatic tire (1) of the present invention includes an attachment body (11) attached to an axle, an outer cylindrical body (13) which surrounds the attachment body (11) from the outside in a tire radial direction, a tread portion (16) which surrounds the outer cylindrical body (13) from the outside in the tire radial direction, and a coupling member (15) which displaceably couples the attachment body (11) to the outer cylindrical body (13), wherein, a spiral reinforcing layer (20) formed by spirally winding an element wire body in which one cord (42) or a plurality of cords (42) parallel to each other are embedded in a covering body on an outer circumferential surface of the outer cylindrical body (13) is bonded to the outer circumferential surface of the outer cylindrical body (13).. . ... Kabushiki Kaisha Bridgestone

03/29/18 / #20180086140

Polyamide-based thermoplastic elastomer and tire

A polyamide-based thermoplastic elastomer including a hard segment and a soft segment, wherein the hard segment contains polyamide 612 and the soft segment contains a polyamine.. . ... Kabushiki Kaisha Bridgestone

03/29/18 / #20180085634

Multi-piece solid golf ball

A multi-piece solid golf ball having a core, at least one intermediate layer encasing the core and at least one outer layer encasing the intermediate layer is characterized in that the intermediate layer is formed of a resin composition containing a specific acid-containing polymer or ionomer resin, and the outer layer is formed of primarily a polyurethane or a polyurea. The ball also has, between the intermediate layer and the outer layer, a bonding layer made of a polycarbonate and/or polyether-type aqueous polyurethane dispersion composition which includes a specific aqueous polycarbodiimide.. ... Kabushiki Kaisha Bridgestone

03/22/18 / #20180079891

Rubber compositions including siliceous fillers

Vulcanizates with desirable properties can be obtained from compositions incorporating polymers that include hydroxyl group-containing aryl functionalities, silica or other particulate filler(s) that contain or include oxides of silicon and a group or compound that can act to covalently bond the filler particles and the polymer. The group can be provided as a substituent of the filler particle, or a discreet compound can be provided in the composition.. ... Kabushiki Kaisha Bridgestone

03/22/18 / #20180079873

Method for producing mixture

Provided is a method for producing a mixture, comprising a mixing step for mixing a slurry prepared by dispersing a filler containing carbon black and a rubber liquid prepared by dispersing or the like a rubber component. In the above producing method, the carbon black contained in the slurry has a surface average acidic functional group amount (μeq/m2) of 0.40 or more and less than 3.00; a ph of the slurry is 8 or more; the sum total of the solid matter concentrations of the slurry and the rubber liquid is 20% by mass or less; a mixing equipment used has one or more rotors disposed rotatably in a rotation axis direction and one or more stators disposed unrotatably in the rotation axis direction; the rotors and the stators have plural projections which are arranged circularly with the rotation axis set as the center; rings are formed concentrically by the projections in a single stage or a multistage; and the slurry and the rubber liquid are allowed to pass through a space between the rotors and the stators while the rotors rotate, whereby the mixing is carried out to produce the mixture.. ... Kabushiki Kaisha Bridgestone

03/22/18 / #20180079265

Internal tire windmill energy harvester

Electrical system may be configured to operate inside a tire mounted to a wheel. Electrical system may include a plurality of microelectromechanical system (mems) devices including a gas flow energy receiver mechanically coupled to at least one base. ... Kabushiki Kaisha Bridgestone

03/22/18 / #20180079262

Tire wear depth estimating method and tire wear depth estimating apparatus

A method and apparatus capable of estimating a tire wear amount even on snow-covered road surfaces accurately and reliably are provided. To that end, a differentiated acceleration waveform of a radial acceleration waveform of a tire is obtained, and an operation of calculating a leading-end differentiated peak value and a trailing-end differentiated peak value from the differentiated acceleration waveform is repeated a plurality of times. ... Kabushiki Kaisha Bridgestone

03/15/18 / #20180073591

Vibration-damping device

The present invention is a liquid-tight the vibration-damping device (10). In this vibration-damping device (10), a limiting passage (24) includes a main body passage (25) disposed inside a partition member (16), a first communication section (26) configured to communicate the main body passage (25) and a first liquid chamber (14), and a second communication section (27) configured to communicate the main body passage (25) with a second liquid chamber (12). ... Kabushiki Kaisha Bridgestone

03/15/18 / #20180072106

Tire

In a tire in which a groove extending in a tire circumferential direction is formed in a tread part, a projection extending in a direction intersecting the tire circumferential direction is provided at a groove bottom of the groove, and the projection includes in a tread surface view of the tire: a rectilinear part extending linearly; and at least one curved part continuing to the rectilinear part and curving in the tire circumferential direction.. . ... Kabushiki Kaisha Bridgestone

03/15/18 / #20180072104

Tire tread featuring a sipe

Various embodiments of a tire tread having at least one sipe comprising an s-shaped geometry are disclosed. In one embodiment, a tire is provided, comprising: a tread portion comprising tread block or tread rib; the tread block or the tread rib having at least one sipe, wherein the at least one sipe includes at least one convex portion and at least one concave portion forming an s-shaped geometry along at least a portion of a length of the sipe, wherein the s-shaped geometry along at least a portion of the length of the sipe has an amplitude (a1), and wherein the amplitude (a1) varies along a radial height of the sipe, and wherein the at least one sipe includes a first curvilinear portion and a second curvilinear portion oriented substantially radially within the sipe, and forming an s-shaped geometry along the radial height of the sipe.. ... Kabushiki Kaisha Bridgestone

03/15/18 / #20180071951

Hot press apparatus and method for producing sintered product

A hot press apparatus includes a mold including: a cylindrical die, a cylindrical outer sleeve provided inside the die, and a cylindrical inner sleeve provided inside the outer sleeve; and a pair of pressing punches for pressing a sample filled into the mold. The inner sleeve has lower rigidity than the outer sleeve and is provided with a graphite sheet member including graphite on the inner side of the mold. ... Kabushiki Kaisha Bridgestone

03/08/18 / #20180066725

Method for manufacturing vibration damping device

Provided is a method for manufacturing a vibration damping device including sealing liquid (l) in a liquid chamber (11) of a vibration damping device main body (10) having the liquid chamber (11) in which the liquid (l) is sealed, and an injection port (12) through which the liquid (l) is injected into the liquid chamber (11). In a state where a nozzle (22) spouting the liquid (l) is thrust into the injection port (12) and an inside of a decompression container (21) having the vibration damping device main body (10) disposed therein is decompressed, the liquid (l) is injected into the liquid chamber (11) through the nozzle (22), and air inside the liquid chamber (11) is discharged through an air discharge port (14) which is formed in the vibration damping device main body (10) and communicates with the liquid chamber (11).. ... Kabushiki Kaisha Bridgestone

03/08/18 / #20180065935

Polymers functionalized with n-protected hydantoin compounds

A method for preparing a functionalized polymer, the method comprising the steps of (i) polymerizing monomer to form a reactive polymer; and (ii) reacting the reactive polymer with an n-protected hydantoin compound. . ... Kabushiki Kaisha Bridgestone

03/08/18 / #20180065426

Devices for reducing tire noise

A noise damper, noise attenuation device, and tire and noise damper assembly are disclosed. The noise damper, noise attenuation device, and tire and noise damper assembly mitigate sound produced by a moving tire. ... Kabushiki Kaisha Bridgestone

03/01/18 / #20180058537

Vibration-proofing device

The present invention includes a first mounting member (11); a second mounting member (12); an actuator (14) which dampens and absorbs input vibration by reciprocally moving a movable element (13) in accordance with input vibration; an actuator case (15) which houses the actuator therein; and a relay connector (17) which is mounted on the actuator case and electrically connects the connector (16) of the actuator and an external power source. The relay connector includes a terminal (27) which connects the connector of the actuator and the external power supply, and a housing (28) in which the terminal is installed. ... Kabushiki Kaisha Bridgestone

03/01/18 / #20180057667

Method for producing rubber composition for tire

In order to allow a braking property on wet roads and a wear resistance to be compatible, provided is a method for producing a rubber composition passing through a stage including a kneading step in which kneaded are 100 parts by mass of a rubber component (a) containing 60% by mass or more of a styrene-butadiene copolymer rubber, 30 to 80 parts by mass of silica (b), 5 to 14 parts by mass of a silane coupling agent (c), 3 to 14 parts by mass of a thermoplastic resin (d), and thiourea compound (e), and including subsequently a kneading step in which a vulcanizing agent (f) is further added and kneaded.. . ... Kabushiki Kaisha Bridgestone

03/01/18 / #20180057615

Method to prepare rubber compounds containing silicon dioxide for the production of tyres

A rubber compound containing silicon dioxide for the production of tyres and comprising a polymer base with a cross-linkable unsaturated chain, a filler comprising silicon dioxide, a silane bonding agent and a vulcanization system. The filler further comprises a composite mineral consisting of a mineral of the zeolite family, onto which a layer of silicon dioxide has been deposited.. ... Kabushiki Kaisha Bridgestone

03/01/18 / #20180056730

Tire

A tire includes at least one air intake groove provided in a tire tread section, extending in a direction intersecting a tire circumferential direction, and having a groove width smaller than a groove depth, an air introduction groove opening to a tread surface side and communicating with the air intake groove to introduce an air on the tread surface side into the air intake groove accompanying tire rotation, and an air-guiding section having an air-guiding surface intersecting the air intake groove and directed outward in a position intersecting the air intake groove with respect to a center position in a groove longitudinal direction of the air intake groove to guide an air introduced into the air intake groove by the air introduction groove to a groove bottom side of the air intake groove by the air-guiding surface.. . ... Kabushiki Kaisha Bridgestone

03/01/18 / #20180056720

Non-pneumatic tire

A non-pneumatic tire (1) of the present invention includes an attachment body (11) attached to an axle, a ring-shaped body (13) which surrounds the attachment body (11) from the outside in a tire radial direction, and coupling members (15) which displaceably couple the attachment body (11) to the ring-shaped body (13), wherein a plurality of coupling members (15) are arranged in a tire circumferential direction and include elastic coupling plates (21 and 22) whose opposite ends are respectively coupled to the attachment body (11) and the ring-shaped body (13), and a bending rigidity ei1 of the elastic coupling plates (21 and 22) represented by e1×w1×t13/12 when the average thickness in the tire circumferential direction is t1 (mm), the average width in a tire width direction h is w (mm), and the young's modulus is e1 (mpa) is smaller than the bending rigidity ei2 of the ring-shaped body (13) represented by e2×w2×t23/12 when the average thickness in the tire radial direction is t2 (mm), the average width in the tire width direction h is w2 (mm), and the young's modulus is e2 (mpa).. . ... Kabushiki Kaisha Bridgestone

02/22/18 / #20180053156

Belt management system and method

A belt management system of the present invention is formed by a management server (1) that manages belts that are used in a belt conveyor, a terminal (2) that is provided in a location where the belt conveyor is installed, and a data server (3) that is provided in a company that manufactures and sells belts, wherein the management server is provided with: a transceiver unit (10) that receives in time series belt remaining thickness data that shows the thickness of the belt and that is supplied from the terminal at each one of predetermined periods; and a belt lifespan prediction unit (11) that, by writing the belt remaining thickness data in the management database in time series, and reading from the management database the belt remaining thickness data that has been stored in time series, and dividing the difference between the predetermined periods by the usage amount of the belt at each of the predetermined periods, and determining a unit amount of change in the usage amount units, and subtracting from the most recent belt remaining thickness data a management threshold value which shows the thickness of the belt and which is to be used as an indicator for replacement, and dividing the result of this subtraction by the unit amount of change, determines a remaining lifespan that shows the future amount of use until the belt needs to be replaced.. . ... Kabushiki Kaisha Bridgestone

02/22/18 / #20180052122

Methods for quantifying rubber content in a plant with nmr

Methods are described for quantifying an amount of natural rubber in a plant from a sample of the plant by obtaining a t1 spin-lattice relaxation rate or t2 spin-spin relaxation rate from a nmr apparatus, such as a low-field nmr apparatus operating at a magnetic field strength of 2 t or less. The nmr relaxation rates obtained from the plant sample are compared to reference relaxation data or plots. ... Kabushiki Kaisha Bridgestone

02/22/18 / #20180050565

Tire

A tire comprises a rubber member formed of a rubber composition comprising a diene-based rubber, and a ring-shaped tire frame formed of a resin material comprising a polyamide-based thermoplastic resin, in which the rubber member is adhered to a resin member including a polyamide-based thermoplastic resin via a layer formed of a composition including a resorcinol-formalin-latex-based adhesive.. . ... Kabushiki Kaisha Bridgestone

02/22/18 / #20180050479

Gear pump extruding machine

A gear pump extruding machine for extruding a rubber material includes a screw feeder, a gear pump provided on an outlet side of the screw feeder, and a die disposed on an outlet side of the gear pump. The gear pump extruding machine further includes protrusive members that are movable forward and rearward to protrude into a fluid communication channel that keeps the screw feeder and the gear pump in fluid communication with each other, to thereby change the volume of the fluid communication channel. ... Kabushiki Kaisha Bridgestone

02/15/18 / #20180043739

Tire

A block has a first wall surface formed from a position where a lateral groove is opened to a first circumferential groove toward an upstream side of an air flow, a second wall surface formed from a position where the lateral groove is opened to a second circumferential groove toward the upstream side of the air flow, and a block corner portion formed at a position where the lateral groove is opened to the first circumferential groove. A virtual surface obtained by extending the first wall surface of the block on the upstream side intersects with the block corner portion of the block on a downstream side or passes through a position in the first circumferential groove inside the block corner portion in a tire width direction. ... Kabushiki Kaisha Bridgestone

02/15/18 / #20180043738

Tire

A block has a first wall surface formed from a position where a lateral groove is opened to a first circumferential groove toward an upstream side of an air flow, a second wall surface formed from a position where the lateral groove is opened to a second circumferential groove toward the upstream side of the air flow, and a block corner portion formed at a position where the lateral groove is opened to the second circumferential groove. A virtual surface obtained by extending the second wall surface on the upstream side intersects with the block corner portion on a downstream side or passes through a position in the second circumferential groove which is apart from the block corner portion in a tire width direction. ... Kabushiki Kaisha Bridgestone

02/08/18 / #the present invention provides a tire improved in the run flat durability, having at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler using a rubber composition comprising a rubber component containing 20% by mass or more of a modified conjugated diene based polymer, satisfying expression (1) in terms of the elongation x under a stress of 6.5 mpa at 180° c. and the elongation y under a stress of 6.5 mpa at 25° c. after vulcanization.

Bridgestone Corporation

. . ... Kabushiki Kaisha Bridgestone

02/08/18 / #20180037069

A runflat tire with sidewall-reinforcing inserts

A run-flat tire having a tread, an inner liner disposed beneath the tread, a body ply, and a pair of sidewalls axially spaced apart from one another is disclosed. The run-flat tire further includes a pair of sidewall-reinforcing portions each disposed in respective sidewall regions and each having a fabric barrier; a first sidewall-reinforcing insert between the fabric barrier and the inner liner; and a second sidewall-reinforcing insert disposed between the fabric barrier and the body ply. ... Kabushiki Kaisha Bridgestone

02/08/18 / #20180037064

Heavy duty pneumatic tire

A belt portion of a heavy duty pneumatic tire includes a cross-laminated body in which extension directions of the cords in the belt layers next to each other in a tire radial direction intersect each other, and a parallel-laminated body in which extension directions of the cords in the belt layers next to each other in the tire radial direction are substantially parallel to each other. The parallel-laminated body is provided in the belt portion in a way that satisfies a relationship expressed with i≧n/2 where n denotes a total number of belt layers included in the belt portion, and i denotes the number of a belt layer, which is located on the inner side in the tire radial direction among the belt layers of the parallel-laminated body, when the belt layers included in the belt portion are counted from an inner side in the tire radial direction.. ... Kabushiki Kaisha Bridgestone

02/08/18 / #20180036977

Expandable rim for tire tread buffing apparatus and method

A machine for retreading tires includes a rotatable hub that includes a moveable conical element, and an expandable rim disposed around the rotatable hub. The expandable rim includes a plurality of shoes. ... Kabushiki Kaisha Bridgestone

02/01/18 / #20180030251

Rubber composition, method for producing diene-based polymer, and tire

This disclosure is to provide a rubber composition excellent in low loss property, breaking resistance and wear resistance. In order to achieve the aforementioned purpose, this disclosure is a rubber composition containing a rubber component having a diene-based polymer and a silica, wherein: the diene-based polymer has 3 or more modified functional groups capable of interacting with the silica merely within a range of ¼ of an entire chain length from a terminal, and has at least one monomer structural unit of a diene-based polymer among the modified functional groups; and a content of the silica is 60 to 250 parts by mass per 100 parts by mass of the rubber component.. ... Kabushiki Kaisha Bridgestone

02/01/18 / #20180030215

Rubber composition for tire and tire

This disclosure provides a rubber composition for tire obtainable by a method for producing a rubber composition comprising: (a) preparing a preliminary composition by preparing a first mixture containing all of or a part of a diene based rubber (a), a silica (b), a silane coupling agent (c) and an activator (d), and containing a glycerin fatty acid ester (e), and kneading the first mixture; and (b) preparing the rubber composition by adding a vulcanizing agent (t,f) into the preliminary composition to prepare a second mixture, and kneading the second mixture, wherein: the glycerin fatty acid ester (e) is an ester of a glycerin and two or more fatty acids, a fatty acid component which is the most among the two or more fatty acids constituting the glycerin fatty acid ester being 10 to 90 mass % of all the fatty acids.. . ... Kabushiki Kaisha Bridgestone

02/01/18 / #20180030159

Rubber composition and tire

This disclosure is to provide a rubber composition excellent in low loss property and wear resistance without deteriorating the processability. The rubber composition of this disclosure contains a rubber component having a diene-based polymer, a silica, and a glycerin fatty acid ester composition, wherein: the diene-based polymer has 3 or more modified functional groups capable of interacting with the silica merely within a range of ¼ of an entire chain length from a terminal, and has at least one monomer structural unit of a diene-based polymer among the modified functional groups; and the glycerin fatty acid ester composition has a glycerin fatty acid monoester and a glycerin fatty acid diester of c8 to c28 fatty acids, and a content of the glycerin fatty acid ester composition is 0.5 to 15 parts by mass per 100 parts by mass of the rubber component.. ... Kabushiki Kaisha Bridgestone

01/25/18 / #20180022903

Rubber composition including conjugated diene polymer and olefin polymer and tire using same

The present invention relates to: a rubber composition comprising a matrix of a nonpolar conjugated diene polymer in which domains formed from an olefin polymer are dispersed, the matrix and the domain having an interface therebetween in which a chemical bond exists after vulcanization, the domain having a dynamic compressive complex elastic modulus (ec*) of 10 mpa or less; or a rubber composition comprising a matrix of a nonpolar conjugated diene polymer in which domains formed from an olefin polymer are dispersed, the matrix and the domain having an interface therebetween in which a chemical bond exists after vulcanization, with an average distance between the domains of 2 μm or less. A rubber composition for improving the ozone resistance and a tire having improved ozone resistance are provided.. ... Kabushiki Kaisha Bridgestone

01/25/18 / #20180022902

Rubber composition, tread member, pneumatic tire, and process for producing rubber composition

An object of the present invention is to enhance, in a rubber composition for tires comprising natural rubber as a principal component of a rubber component, a viscosity of the rubber composition in an unvulcanized state by providing the rubber composition with flexibility to improve workability of the rubber composition and improve a low loss tangent of the rubber composition after vulcanization while maintaining the performances both on snow and ice road surfaces and wet road surfaces. Used in the present invention is a rubber composition comprising a rubber component containing 60% by mass or more of natural rubber, wherein the rubber composition comprises 8 to 40 parts by mass of a thermoplastic resin based on 100 parts by mass of the rubber component and poly-p-dinitrosobenzene.. ... Kabushiki Kaisha Bridgestone

01/25/18 / #20180022164

Tire

Circumferential groove's heat radiation on a tread center portion side of a plurality of blocks is enhanced. A block has a first wall surface formed from a position where a lateral groove is opened to a first circumferential groove toward an air flow's upstream side g, a second wall surface formed from a position where lateral groove is opened to a second circumferential groove toward the air flow's upstream side g, and a block corner portion formed at a position where lateral groove is opened to first circumferential groove. ... Kabushiki Kaisha Bridgestone

01/18/18 / #20180016427

Tire

A tire having a circular tire frame formed of a resin material, the resin material including an olefin-based resin composition and having a tensile elastic modulus as defined in jis k7113 (1995) of from 140 mpa to 570 mpa and an amount of creep as defined in jis k7115 (1999) of 50 mm or less, and a degree of crystallinity of the polypropylene-based resin being from 24.5% to 32.7%.. . ... Kabushiki Kaisha Bridgestone

01/18/18 / #20180016425

Rubber composition and tire using same

The present invention provides: a rubber composition prepared by mixing 60 to 100 parts by mass of a filler (b), 0.9 to 2.4 parts by mass of a phenol resin (c), 0.07 to 0.2 parts by mass of a methylene donor (d), 1.5 to 2.1 parts by mass of a thiuram based vulcanization accelerating agent (e), and 3.2 to 4.5 parts by mass of a sulfenamide based vulcanization accelerating agent (f), based on 100 parts by mass of the rubber component comprising 20 to 80% by mass of a modified conjugated diene based polymer (a), allowing the ride comfort in normal running to be satisfied in parallel with improvement in the run flat durability (durability in run flat running); and a tire comprising at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler using the rubber composition.. . ... Kabushiki Kaisha Bridgestone

01/18/18 / #20180016361

Modified conjugated diene-based polymer and rubber composition containing same

The present invention provides a modified conjugated diene polymer in which a phenoxy group of a polar group-containing phenoxy compound is bonded to at least one selected from the group consisting of the end, main chain, and side chain of a conjugated diene polymer, which can further improve a rubber composition in the low-heat-generation property and abrasion resistance, and a rubber composition using the same.. . ... Kabushiki Kaisha Bridgestone

01/18/18 / #20180015799

Stopper for vehicle

The present invention relates to a stopper (10) for vehicle which is disposed between a vehicle body side member (31) and a wheel side member (32) to restrict a relative amount of movement of both members (31, 32). The stopper includes a cylindrical holding member (11) attached to one of both members (31, 32), and an elastic body (12) which faces the other of both members (31, 32). ... Kabushiki Kaisha Bridgestone

01/18/18 / #20180015791

Tire

The present invention provides a tire improved in the run flat durability, having at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler using a rubber composition having a tensile stress at 50% elongation at 180° c. (m50) of 6.2 mpa or more as a vulcanized rubber physical property.. ... Kabushiki Kaisha Bridgestone

01/18/18 / #20180015788

Pneumatic tire

A center land part and intermediate land parts formed on the tread surface by four main grooves are partitioned in the circumferential direction of the tire only by sipes, and form block parts arranged in the circumferential direction. The acute angle parts of each of the block parts are all chamfered from the tread surface side. ... Kabushiki Kaisha Bridgestone

01/18/18 / #20180015787

Pneumatic tire

This pneumatic tire has a tread part partitioned by four main grooves into a center land part, an outer intermediate land part, an inner intermediate land part, an outer shoulder land part, and an inner shoulder land part. The center land part is formed with center lug grooves in which the installation outer side is narrower than the installation inner side. ... Kabushiki Kaisha Bridgestone

01/18/18 / #20180015785

Non-pneumatic tire assembly including a replaceable tread element

Various embodiments of a non-pneumatic tire assembly including a replaceable tread element are disclosed. In one embodiment, a tire assembly is provided, the tire assembly comprising: a non-pneumatic tire having: a rim portion, an outer ring oriented radially outward of the rim portion, and a web structure connecting the rim portion and the outer ring; an inner tread band oriented radially outwardly of the non-pneumatic tire and connected to a radially outer side of the outer ring; and an outer tread oriented radially outwardly of the inner tread band and connected to the inner tread band.. ... Kabushiki Kaisha Bridgestone

01/18/18 / #20180015784

Tire

A tire (10), including a circular tire frame (17) including a resinous material, the resinous material including at least polypropylene and having a pentad ratio of from 88.2% to 93.4%. The resinous material may include at least a first resin that is polypropylene and a second resin that is different from the first resin.. ... Kabushiki Kaisha Bridgestone

01/11/18 / #20180010295

Rubber-article-reinforcing steel cord and tire

Provided is a rubber article-reinforcing steel cord having improved shear fatigue resistance while reducing the weight of the steel cord by using a wire of high tensile strength. The rubber article-reinforcing steel cord 10 is a steel cord 10 having a two-layer twisted structure comprising a core filament 11 composed of a plurality of filaments and a sheath filament 12 composed of a plurality of filaments twisted around the core filament 11, wherein the tensile strength of the core filament 11 is higher than the tensile strength of the sheath filament 12, and the core filament 11 and the sheath filament 12 are twisted together in the same direction and the same pitch.. ... Kabushiki Kaisha Bridgestone

01/11/18 / #20180009971

Rubber composition and tire comprising sustainable resources and related methods

Recycled elements and/or renewable resources, such as recycled carbon black or recycled carbon black and recycled particulate rubber, are incorporated into a rubber composition. The rubber composition can be used to manufacture tires or various tire components including tire subtreads.. ... Kabushiki Kaisha Bridgestone

01/11/18 / #20180009919

Cis-1,4-polydienes with improved cold flow resistance

A method for preparing cis-1,4-polydienes having useful resistance to cold flow, the method comprising the steps of preparing a polymerization system including a reactive polymer by introducing a lanthanide-based catalyst and a conjugated diene monomer and adding a lewis acid to the polymerization system including a reactive polymer.. . ... Kabushiki Kaisha Bridgestone

01/11/18 / #20180009918

Aged lanthanide-based catalyst systems and their use in the preparation of cis-1,4-polydienes

A method for preparing cis-1,4-polydienes, the method comprising the steps of preparing a preformed, active lanthanide-based catalyst, aging the active lanthanide-based catalyst for more than 5 days to thereby formed an aged catalyst, and introducing the aged catalyst and conjugated diene monomer to be polymerized to thereby form an active polymerization mixture in which the conjugated diene monomer is polymerized to form a polydiene having a reactive chain end.. . ... Kabushiki Kaisha Bridgestone

01/11/18 / #20180009275

Pneumatic tire

The disclosed pneumatic tire includes a marking portion on an outer surface of a tire side portion, the marking portion including one or more markings that include a letter, a symbol, or a graphic. In a side view of the tire, the marking portion has a curved shape, linear ridges are arranged in the one or more markings of the marking portion, and all of the ridges in the marking portion are parallel.. ... Kabushiki Kaisha Bridgestone

01/11/18 / #20180009262

Non-pneumatic tire

Various example embodiments of a non-pneumatic tire, and methods for making the same, are disclosed. In one embodiment, a non-pneumatic tire is provided, the non-pneumatic tire comprising: a tread; at least one support ring, wherein the at least one support ring and the tread are concentric; at least one base element oriented between the tread and the at least one support ring; and a hub.. ... Kabushiki Kaisha Bridgestone

01/11/18 / #20180009261

Rubber compositions for radio devices in tires

The embodiments described herein generally relate to an electronic communication module suitable for incorporating into a tire or tire retread, where the electronic communication module comprises a radio device having at least a portion of its outer surface surrounded by a rubber composition. Certain embodiments also relate to tires or tire retreads containing the electronic communication module. ... Kabushiki Kaisha Bridgestone

01/04/18 / #20180003785

Methods for determining plant rubber content with low field nmr

Methods are described for quantifying an amount of natural rubber in a plant from a sample of the plant by obtaining a nmr spectrum and analyzing the signal peaks for the natural rubber in the plant sample and a standard component tested in combination with the plant sample. The nmr testing is conducted on a liquid state sample of a solution containing dissolved plant sample and standard component. ... Kabushiki Kaisha Bridgestone

01/04/18 / #20180003218

Laminate and conductive roller

This disclosure is to provide a laminate with improved adhesiveness between the layers, and a conductive roller having the laminate. The laminate of this disclosure is a laminate comprising at least 2 or more energy ray curable resin layers formed by curing a resin composition with an energy ray, wherein: the laminate has an energy ray curable resin layer (1) and an energy ray curable resin layer (2); and a first resin composition used in formation of the energy ray curable resin layer (1) contains an energy ray curable resin (a) having a hydrocarbon ring skeleton.. ... Kabushiki Kaisha Bridgestone

01/04/18 / #20180002490

Terminal-functionalized polymer and related methods

Disclosed herein are terminal-functionalized polymers functionalized with silicon-containing functionalizing agents, rubber compositions including the polymers, methods for improving the cold flow resistance of a polymer, methods for improving the filler dispersion of a silica-filled rubber composition, and processes for preparing the terminal-functionalized polymer.. . ... Kabushiki Kaisha Bridgestone

01/04/18 / #20180001704

Tire with arched spokes

A tire includes an inner hoop, an outer hoop, and a plurality of spokes extending from the inner hoop to the outer hoop. Each of the spokes includes a y-shaped base, including a radially extending stem, a first concave branch, and a second concave branch. ... Kabushiki Kaisha Bridgestone

01/04/18 / #20180001703

Tire sidewalls including polymeric organosilicon compounds

A tire sidewall comprising a vulcanized rubber and a polymeric organo silicon compound.. . ... Kabushiki Kaisha Bridgestone

01/04/18 / #20180001699

Non-pneumatic tire

There is provided a non-pneumatic tire (1) including: an attachment body (11) that is attached to an axle; a ring-shaped body (13) that surrounds the attachment body (11) from an outside in a tire radial direction, a plurality of connection members (15) that are disposed between the attachment body (11) and the ring-shaped body (13) along a tire peripheral direction and connect the attachment body (11) and the ring-shaped body (13) to each other, and a cylindrical tread member (16) that is externally mounted on the ring-shaped body (13), in which the ring-shaped body (13) and the connection member (15) are integrally formed by a injection molding in which a molding material is injected from the connection member (15) side toward the ring-shaped body (13) side, in which the tread member (16) includes a base rubber portion (41) that is positioned at an inside in the tire radial direction and a cap rubber portion (42) that is positioned at an outside of the base rubber portion (41) in the tire radial direction, in which rigidity of the base rubber portion (41) is lower than rigidity of the cap rubber portion (42), and in which the base rubber portion (41) is disposed at least in a portion positioned between the connection members (15) adjacent to each other in the tire peripheral direction in the ring-shaped body (13).. . ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170369739

Amino alkoxy-modified silsesquioxane adhesives for adhering steel alloy to rubber

A coated wire includes a steel alloy coated with a coating comprising one or more amino alkoxy-modified silsesquioxane compounds selected from the group consisting of an amino alkoxy-modified silsesquioxane, an amino/mercaptan co-alkoxy-modified silsesquioxane, an amino/blocked mercaptan co-alkoxy-modified silsesquioxane, or a salt of one or more thereof. A rubber composition and a process for coating wire is also disclosed.. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170369682

Hemp oil-containing rubber compositions and related methods

Disclosed herein are rubber compositions comprising hemp oil and a rubber, and tires (and tire components) made from the rubber compositions. Also disclosed are methods of improving the tear resistance of a rubber composition by utilizing hemp oil in the rubber composition.. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170369621

Halogenated wax grafted to low molecular weight polymer and rubber composition

A wax-polymer compound includes (a) a polymer component that is a polymerized unsaturated monomer, optionally copolymerized with a vinyl-aromatic monomer, and (b) a halogenated hydrocarbon wax component. The polymer component is grafted to the halogenated hydrocarbon wax component, and the wax-polymer compound has a number average molecular weight of about 1,000 to about 100,000, a method of making the wax-polymer compound and a coated silica particle are also disclosed. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170369620

Actinic radiation curable polymeric mixtures, cured polymeric mixtures and related processes

The present disclosure is directed to actinic radiation curable polymeric mixtures, cured polymeric mixtures, tires and tire components made from the foregoing, and related processes.. . ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368881

Non-pneumatic tire

There is provided a non-pneumatic tire (1), which includes an attachment body (11) that is attached to an axle, a ring-shaped body (13) that surrounds the attachment body (11) from an outside in a tire radial direction, a connection member (15) that displaceably connects the attachment body (11) and the ring-shaped body (13) to each other, and a cylindrical tread member (16) that is externally mounted on the ring-shaped body (13), in which the tread member (16) includes a base rubber portion (41) that is positioned at an inside in the tire radial direction, and a cap rubber portion (42) that is positioned at an outside of the base rubber portion (41) in the tire radial direction, and in which the rigidity of the base rubber portion (41) is lower than the rigidity of the cap rubber portion (42).. . ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368880

Tire and wheel assembly having angled interfaces

A tire is configured to be received by a wheel having at least one angled surface. The tire includes a tread portion, a first sidewall, and a second sidewall. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368876

Rubber composition and method for producing same, crosslinked rubber composition, and tire

As a rubber composition excellent in fatigue resistance and a method for producing the same, this disclosure provides a rubber composition containing a zinc oxide, wherein: a total volume of aggregates of the zinc oxide with a diameter of 20 μm or more is 0.008 or less in the rubber composition by volume fraction; and a method for producing the rubber composition, comprising: preparing a wet masterbatch by using a carbon black with a surface average acidic functional group amount (μeq/m2) of 0.15 or more and less than 3.00, preferably 0.40 or more and less than 1.50; and compounding a zinc oxide with the wet masterbatch.. . ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368875

Rubber compositions for radio devices in tires

The embodiments described herein generally relate to an electronic communication module suitable for incorporating into a tire or tire retread, where the electronic communication module comprises a radio device having at least a portion of its outer surface surrounded by a rubber composition. Certain embodiments also relate to tires or tire retreads containing the electronic communication module. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368874

Rubber compositions for radio devices in tires

The embodiments described herein generally relate to an electronic communication module suitable for incorporating into a tire or tire retread, where the electronic communication module comprises a radio device having at least a portion of its outer surface surrounded by a rubber composition. Certain embodiments also relate to tires or tire retreads containing the electronic communication module. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368427

Golf ball manufacturing method

A method of manufacturing golf balls having a core and a cover of at least one layer encasing the core includes the steps of producing a core by molding and vulcanizing a rubber composition containing (a) a base rubber, (b) an α,β-unsaturated carboxylic acid and/or a metal salt thereof, and (c) an organic peroxide; and heat-treating the core for 1 to 24 hours at between 175 and 300° c. Golf balls which undergo little energy loss and have a high initial velocity can be obtained by this method.. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368426

Golf ball

In a golf ball having a core and a cover of one or a plurality of layers that encases the core, the core or at least one layer of the cover is formed of a resin composition which contains from 5 to 250 parts by weight of a mechanoluminescent material that receives mechanical energy and luminesces per 100 parts by weight of a base material which is a rubber material or a resin material. This golf ball has an excellent visibility in that, even under dark conditions, the ball impact site can be clearly confirmed visually at the time of impact. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368424

Golf ball with built-in ic chip

A golf ball includes: a radio frequency identification (rfid) tag including an ic chip and an antenna; a protection layer surrounding the outer periphery of the rfid tag; a relaxation layer surrounding the outer periphery of the protection layer; a core surrounding the outer periphery of the relaxation layer; and a cover surrounding the outer periphery of the core. The curing temperature of the protection layer is 60° c. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368420

Golf ball

In a golf ball having a core and a cover of at least one layer, the core and/or at least one layer of the cover are formed of a resin composition that includes (a) 100 parts by weight of a thermoplastic resin, and (b) 1 to 30 parts by weight of a compound having a fluorene skeleton, or a derivative thereof. This resin composition for golf balls has an improved injection-moldability and thus enables the ball to achieve both a reduced spin rate and a good durability (scuff resistance).. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368419

Rubber composition for golf ball, and golf ball

A rubber composition for golf balls includes (a) a base rubber, (b) two different metal salts of α,β-unsaturated carboxylic acids having 3 to 8 carbon atoms, (c) a metal salt in which at least one bonding site is a fatty acid of 9 or more carbon atoms, and (d) a crosslinking initiator. Letting component (b) include (b-1) an unsaturated metal carboxylate in a high compounding weight and (b-2) an unsaturated metal carboxylate in a low compounding weight, the ratio (b-2)/(b-1) is from 4 to 20 wt % and the ratio (b-2)/(c) is from 20 to 115 wt %. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368418

Golf ball

In a golf ball having a core and a cover of at least one layer encasing the core, the core is a product molded under heat from a rubber composition which includes (a) a base rubber, (b) an unsaturated carboxylic acid and/or a metal salt thereof, and (c) an organic peroxide. Letting the content of component (b) in the rubber composition per 100 parts by weight of component (a) be x parts by weight and the concentration of volatile substances from component (b) within the core be a wt %, the value a/x is 0.0123 or less. ... Kabushiki Kaisha Bridgestone

12/28/17 / #20170368411

Positioning system and positioning method

A positioning system includes a golf ball and a mobile terminal. The golf ball includes a battery and a transmitter configured to operate with electric power supplied from the battery and transmit a radio signal to outside of the golf ball. ... Kabushiki Kaisha Bridgestone

12/21/17 / #the invention provides a golf ball that is a one-piece golf ball or a golf ball having a core and a cover of one layer or a plurality of layers, wherein the one-piece golf ball or core is formed of a material molded under heat from a rubber composition containing:

Bridgestone Sports Co., Ltd.

. . ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170363558

Tire inspection apparatus

A tire inspecting apparatus for a tire is provided. The apparatus includes a test stand for supporting and rotating a tire. ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170362416

Oil-containing rubber compositions and related methods

Disclosed herein are rubber compositions comprising bio-oil produced by a recombinant cell. Also disclosed are methods of controlling the variability of fatty acid content in bio-oil containing rubber compositions or tires comprising at least one component incorporating the bio-oil containing rubber composition, and a method of providing a bio-oil-containing tire with a reduced carbon footprint.. ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170361663

Method and apparatus for utilizing preprinted labels and appliques on a tire

A tire for displaying at least one indicium includes a label affixed to the tire at a mounting location. The label has a first side facing away from the tire and a second side connected to the tire. ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170361662

Radar wear sensing for tire applications

A radar-based-sensing system for a tire includes a plurality of sensors disposed circumferentially around a tire annulus. Each sensor in the plurality of sensors is permanently disposed within the tire annulus. ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170361661

Rfid wear sensing for tire applications

A tire or tire tread features a helical, metallic rfid tag antenna, configured to provide an operable frequency response between 900 and 930 mhz upon receiving 100 electromagnetic waves having a power between 12 and 24 dbm. The helical, metallic rfid tag antenna is disposed within the at least one tread feature and has a wear rate commensurate with a wear rate of the at least one tread feature. ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170361655

Methods for treating inner liner surface, inner liners resulting therefrom and tires containing such inner liners

Methods for treating the surface of a cured inner liner are disclosed. By use of these methods a treated, cured inner liner is produced which has a lower surface with increased adherability to other materials (e.g., adhesives). ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170361654

Tire sidewalls including high molecular weight waxes

A tire sidewall comprising a vulcanized rubber and a high molecular weight wax.. . ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170361557

Tire having an over-molded bead construction

A pneumatic tire having a bead filler molded over a bead bundle to form an over-molded bead. The bead bundle may include at least one bead wire. ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170361554

System and apparatus for heating molds

Various systems and apparatuses for heating molds, including for example tire molds, are disclosed. Heating of molds may be effected via induction heating technology. ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170361553

Sipe blade venting structure

A system for venting a tire mold including at least one conduit that creates a fluid connection between an interior and an exterior of a tire mold, with at least one sipe blade extending across the conduit such that the air to either side of the sipe blade will exit the tire mold interior when a tire is formed.. . ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170361552

Tire mold and vent insert having corresponding surfaces

A system for venting a tire mold includes a tire mold having an interior region and an exterior region. The interior region is defined by a surface having a non-smooth portion that defines a pattern. ... Kabushiki Kaisha Bridgestone

12/21/17 / #20170361178

Golf club head

A hollow golf club head includes a face portion. The head includes a hollow head body, a face member that forms the face portion, and a connecting portion provided between the head body and the face member connects the head body and the face member. ... Kabushiki Kaisha Bridgestone

12/14/17 / #20170357887

Tire having radio frequency identification device for monitoring structural health

A tire includes a plurality of tire components defining a plurality of layers. A radio frequency identification (rfid) tag is disposed between at least two of the plurality of layers. ... Kabushiki Kaisha Bridgestone

12/14/17 / #20170355406

Sprocket and elastic crawler drive mechanism

A sprocket (10) is capable of engaging with engaging portions (22) on an elastic endless belt (21). On a tooth face (f) of a tooth (12) of the sprocket (10), a portion of a tooth base on at least one side of a center line (o1) of the tooth (12) is a tooth base surface (12b), and the tooth base surface (12b) is inclined relative to the center line (o1) of the tooth (12) at an angle (a1) in a range of 0° or greater to 7.5° or less so as to approach the center line (o1) of the tooth (12) towards a tooth tip surface (12d).. ... Kabushiki Kaisha Bridgestone

12/14/17 / #20170355238

Rubber article including electronics device fastener

A rubber article having an electronics device fastener is provided. In one embodiment, a tire is provided, the tire comprising: a first surface; a second surface; and a tire body contained between the first surface and the second surface; wherein the tire body comprises a cavity having a cavity major width in at least one of an axial direction and a circumferential direction, wherein a channel extends between the cavity and the first surface, wherein the channel has a channel major width in at least one of the axial direction and the circumferential direction, wherein the cavity major width is greater than the channel major width, and wherein a protrusion of a fastener is engaged within the cavity.. ... Kabushiki Kaisha Bridgestone

12/14/17 / #20170355237

Assembly for attaching an electronics package to a tire

An assembly for mounting an electronics package to an interior of a tire includes a carriage configured to receive an electronics package. The assembly also includes an attaching device having a first side and a second side. ... Kabushiki Kaisha Bridgestone

12/14/17 / #20170355236

Tire electronics securing structures

An inflatable electronics band for use in a tire features an annular, flexible, inflatable, tubular body configured to contact an inner portion of a tire opposite the tread surface, such as an innerliner. The inflatable electronics band further features an inflation valve, disposed on the tubular body. ... Kabushiki Kaisha Bridgestone

12/14/17 / #20170355235

Rubber article including electronics attachment mechanism

A rubber article having an electronics attachment mechanism is provided. In one embodiment, the rubber article is a tire, comprising: a tread surface; an inner surface; and a tire body contained between the tread surface and the inner surface; wherein the tire body comprises a cavity having a cavity major width in at least one of an axial direction and a circumferential direction, wherein a channel extends between the cavity and the inner surface, wherein the channel has a channel major width in at least one of the axial direction and the circumferential direction, and wherein the cavity major width is greater than the channel major width.. ... Kabushiki Kaisha Bridgestone

12/14/17 / #20170355233

Tire with concave sidewalls

A tire having a central axis and a radius further includes a circumferential tread having a convex cross-section. The convex cross-section is defined by a radius that is less than a maximum radius of the tire. ... Kabushiki Kaisha Bridgestone

12/14/17 / #20170355178

Laminate and conductive roller

This disclosure is to provide a laminate with improved adhesiveness between the layers and excellent softness, and a conductive roller which enables sufficient pressing contact when pressed to other members. The laminate of this disclosure is a laminate comprising at least 2 or more energy ray curable resin layers formed by curing a resin composition with an energy ray, wherein: the laminate has an energy ray curable resin layer (1) and an energy ray curable resin layer (2); and a first resin composition used in formation of the energy ray curable resin layer (1) contains an energy ray curable resin (a) having an ethylene oxide skeleton having two or more ethylene oxide repeating units.. ... Kabushiki Kaisha Bridgestone

12/14/17 / #20170355159

Method of applying a post cure laminate to a tire

A method of applying a laminate to a tire includes pre-treating a portion of the tire and placing the laminate on at least the pre-treated portion of the tire. The method further includes placing an electrical heating element on top of the laminate and placing a pressure element over the electrical heating element and the laminate. ... Kabushiki Kaisha Bridgestone

12/14/17 / #20170354261

Seat pad and method for manufacturing seat pad

It is provided a seat pad having excellent comfort in seating with improved air permeability and cushion durability in a seat pad of the vehicle seat. The seat pad includes an air permeable member having a ventilation n function with an outside. ... Kabushiki Kaisha Bridgestone

12/07/17 / #20170349010

Attachment patch for mounting devices

An apparatus for mounting an object within a tire includes a ply having a first side for mounting against an innerliner of the tire and a pedestal extending upwards from a second side of the ply. The pedestal has a recessed planar top surface, with an elongated front cavity, an elongated rear cavity, and a substantially cylindrical central cavity disposed therein. ... Kabushiki Kaisha Bridgestone

12/07/17 / #20170349007

Optical-based tread depth measuring device, system, and method

A device, system, and method for optically measuring the tread depth of a tire mounted on a vehicle, wherein at least one of a camera, a processor, and an onboard computer may be configured to determine the tread depth from images of the tire tread. Tread depth may be measured when the vehicle is either stationary or moving. ... Kabushiki Kaisha Bridgestone

12/07/17 / #20170349005

Flanged tire and wheel assembly

A non-pneumatic tire includes a circumferential tread having a first axial width. The tire further includes a lower annular band having a circumferential convex curved surface and a second axial width greater than the first axial width. ... Kabushiki Kaisha Bridgestone

11/30/17 / #20170343452

Tire fault portion prediction system and tire fault portion prediction method

The tire fault portion prediction system of this disclosure comprises: a tire running parameter measurement unit, a state characteristic value measurement unit, a degree of fatigue characteristic value calculation unit, and a tire fault portion prediction unit for predicting fault portions of a tire based on a degree of fatigue characteristic value of at least one of the tire constituent members and the tire running parameter. The tire fault portion prediction method of this disclosure comprises: measuring a tire running parameter, measuring state characteristic values, calculating degree of fatigue characteristic values, and predicting fault portions of a tire based on a degree of fatigue characteristic value of at least one of the tire constituent members and the tire running parameter.. ... Kabushiki Kaisha Bridgestone

11/30/17 / #20170343072

Vibration damping device

The vibration damping device 1 comprises an outer cylinder member 9 formed by winding a flat plate member into a cylindrical shape; an inner mounting member 11 connected to the outer cylinder member via elastic members 14; and a rod portion 30, wherein: the outer cylinder member has a meeting portion 60 where end surfaces of the flat plate member on both circumferential ends of the outer cylinder member face each other; a joint portion 61, where joining was performed, is formed on at least a part of the meeting portion; and the rod portion is connected to an outer circumferential surface of the outer cylinder member so as to not overlap the meeting portion.. . ... Kabushiki Kaisha Bridgestone

11/30/17 / #20170342253

Rubber compositions containing whey protein

The present disclosure is directed to rubber compositions comprising a butyl rubber or a halogenated butyl rubber, at least one filler, and a whey protein component. The whey protein component is present in an amount sufficient to provide about 0.1 to about 10 phr whey protein in the rubber composition. ... Kabushiki Kaisha Bridgestone

11/30/17 / #20170342252

Rubber compositions containing whey protein

The present disclosure is directed to rubber compositions comprising a conjugated diene rubber, a reinforcing silica filler, and a whey protein component. The whey protein component is in an amount sufficient to provide about 0.1 to about 10 phr whey protein. ... Kabushiki Kaisha Bridgestone

11/30/17 / #20170342187

Block copolymers including high vinyl segments

A method for the preparation of block copolymers including at least one high vinyl segment, the method comprising (i) charging into a reactor a diene monomer in a hydrocarbon solvent, a catalytically effective amount of anionic initiator, and an oligomeric oxolanyl propane, whereby the reactor is optionally cooled, to form a first batch; (ii) allowing the monomer to polymerize at a peak polymerization temperature of at least about 18° c. And less than about 60° c. ... Kabushiki Kaisha Bridgestone

11/30/17 / #20170341471

Tire with tread features having offset protrusions

A shear-controlled tire tread includes a plurality of narrow channels disposed generally perpendicular to a rolling direction. Each narrow channel includes a heel side, a toe side, and a valley connecting the heel side and the toe side, and a first plurality of ridges disposed on a heel side and a second plurality of ridges disposed on a toe side. ... Kabushiki Kaisha Bridgestone

11/30/17 / #20170341464

Non-pneumatic tire

A non-pneumatic tire (1) of the present invention is provided with: an attachment body (11) attached to an axle; an outer cylindrical body (13) which surrounds the attachment body (11) from the outside in a tire radial direction; a coupling member (15) which displaceably couples the attachment body (11) and the outer cylindrical body (13); a cylindrical tread member (16) which is wrapped externally around the outer cylindrical body (13); and a protective member (41) which covers a side surface in a tire width direction (h) of the outer cylindrical body (13) from the outside in the tire width direction (h).. . ... Kabushiki Kaisha Bridgestone

11/23/17 / #a rubber compound comprising a polymer base with a cross-linkable unsaturated chain, a filler and a vulcanization system. the vulcanization system comprises at least sulphur, one or more vulcanization accelerators, and one or more vulcanization activators. the vulcanization system comprises, as a vulcanization activator, a zinc salt of a monocarboxylic acid with general formula (i)

Bridgestone Corporation

. . ... Kabushiki Kaisha Bridgestone

11/23/17 / #20170335045

Block copolymers including high vinyl segments

A method for the preparation of block copolymers including at least one high vinyl segment, the method comprising (i) charging into a reactor a diene monomer in a hydrocarbon solvent, a catalytically effective amount of anionic initiator, and an oligomeric oxolanyl propane, whereby the reactor is optionally cooled; (ii) allowing the diene monomer to polymerize at a peak polymerization temperature of at least about 18° c. And less than about 60° c. ... Kabushiki Kaisha Bridgestone

11/23/17 / #20170335032

Bulk polymerization of polyisoprene with preformed catalyst

A method for producing polyisoprene, the method comprising the steps of preparing a preformed lanthanide-based catalyst in the presence of 1,3-butadiene and forming a polymerization mixture by introducing the preformed catalyst to isoprene, where the polymerization mixture includes less than 20% by weight of organic solvent based upon the total weight of the polymerization mixture.. . ... Kabushiki Kaisha Bridgestone

11/23/17 / #20170334248

Pneumatic motorcycle tire

The pneumatic motorcycle tire includes a spiral belt, wherein: an aspect ratio of the tire is 60% or more; at a standard condition, each lap of reinforcing cords is located at a constant spacing along a periphery of the spiral belt among the entire tire width direction; in the tire widthwise cross section, a spacing a along the periphery of the spiral belt between each lap of the reinforcing cords adjacent in the tire width direction is 3.5 mm or more and 6.0 mm or less; a spacing b along the periphery of the spiral belt between the two reinforcing cords for forming the strip member is 0.8 mm or more and 1.5 mm or less; and a rupture strength of one of the reinforcing cords is 200 n or more and 1000 n or less.. . ... Kabushiki Kaisha Bridgestone

11/23/17 / #20170333991

Method for manufacturing three-dimensional object and three-dimensional object

A method for manufacturing a three-dimensional object includes converting model data of the three-dimensional object into slice data, sintering powder based on the slice data after the conversion, and manufacturing the three-dimensional object by a layered manufacturing process of stacking a plurality of sintered layers. The method includes a part data correction process of correcting positional information of at least one of mutually adjoining part data of the model data of the three-dimensional object, and laying part data on each other by a predetermined amount of overlap, converting the model data corrected in the part data correction process into slice data, and after forming a sintered layer based on the slice data corresponding to one part, forming a sintered layer based on the slice data corresponding to the other part.. ... Kabushiki Kaisha Bridgestone

11/23/17 / #20170333766

Golf club head

A wood type golf club head includes a face portion, a crown portion, and a sole portion. The face portion includes an impact area, a toe-side area on a toe side with respect to the impact area, and a heel-side area on the heel side with respect to the impact area. ... Kabushiki Kaisha Bridgestone

11/23/17 / #20170333759

Multi-piece solid golf ball

In a multi-piece solid golf ball having a core, an envelope layer encasing the core, an intermediate layer encasing the envelope layer, and an outermost layer encasing the intermediate layer, the envelope layer-encased sphere, the intermediate layer-encased sphere and the ball have surface hardnesses which satisfy a specific relationship, the intermediate layer and the cover have thicknesses which satisfy a specific relationship, and the core has a hardness profile in which the hardnesses at the core surface, core center, a position 5 mm from the core center, and a position midway between the core surface and center satisfy specific relationships. This golf ball satisfies at a high level the flight and control performances desired for use by professional golfers and skilled amateurs. ... Kabushiki Kaisha Bridgestone

11/16/17 / #20170327163

Elastic crawler drive mechanism

This disclosure is to provide an elastic crawler drive mechanism including an elastic crawler (20) with engaging portions (22) disposed on an endless belt (21), and a sprocket (10) having teeth (12), wherein: engaging surfaces (f2) of the engaging portions (22) have flat engaging planes (22b) in contact with a part of tooth surfaces (f1) of the sprocket (10) when in contact with tooth bottom surfaces (11a) of the sprocket (10), and when the engaging portions (22) are in contact with the tooth bottom surfaces (11a), and simultaneously the engaging planes (22b) are in contact with the tooth surfaces (f1) of the sprocket (10), at least one of the tooth surfaces (f1) of the sprocket (10) and the engaging planes (22b) of the engaging portions (22) form gaps (c) between the tooth surfaces (f1) and the engaging planes (22b), on sides closer to the tooth bottom surfaces (11a) than contact portions (p) of the tooth surfaces (f1) and the engaging planes (22b).. . ... Kabushiki Kaisha Bridgestone

11/16/17 / #20170327020

Seat pad

A seat pad (10) is formed from a foamed molded body. A passenger contact surface (11) which, in a plan view of the seat pad (10), is formed in the shape of a rectangle that is long in the lengthwise direction (x) and short in the widthwise direction (y), is provided. ... Kabushiki Kaisha Bridgestone

11/16/17 / #20170326925

Tyre comprising a foam material for acoustic absorption

A tyre comprising an impermeable layer designed to ensure the sealing under pressure of the air contained in the inner cavity of the carcass and a foam material provided on the inside of said inner cavity, wherein the foam material is made up of open cell foam with a cell size or diameter of from 150 to 190 μm and a standard deviation of 5% to 15%.. . ... Kabushiki Kaisha Bridgestone

11/16/17 / #20170326922

Tire with bead regions having multiple bead fillers

A tire includes a bead portion with a bead core having a main bead filler and an auxiliary bead filler, and a carcass ply wrapped around a portion of the main bead filler. An end of the carcass ply is located axially outside the main bead filler and radially below an apex of the main bead filler. ... Kabushiki Kaisha Bridgestone

11/16/17 / #20170326827

Adjusting expandable rim width using a band

A rim for mounting a tire includes a base portion and a rim portion. The rim portion includes a rim segment, a first flange segment positioned on one side and a second flange segment positioned on an opposite side of the rim segment. ... Kabushiki Kaisha Bridgestone

11/09/17 / #the present invention provides a rubber composition obtained by compounding a rubber component (a) containing a copolymer of a conjugated diene compound and an aromatic vinyl compound, a filler containing an inorganic filler (b), a silane coupling agent (c), and at least one accelerator (d) selected from the group consisting of zinc dithiophosphates represented by the general formula (1), being good in the processability in an unvulcanized state, and having a low-heat-generation property and a low abrasion property:

Bridgestone Corporation

. . ... Kabushiki Kaisha Bridgestone








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