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Bridgestone Corporation patents


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

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


Elastic crawler and elastic crawler device

Provided is an elastic crawler and an elastic crawler device capable of achieving both low fuel consumption and excellent ride comfort. The elastic crawler comprises: a main body; cores respectively having a pair of wings and being embedded in a circumferential direction; a track roller rolling surface formed on an inner circumferential surface of the main body; a recess formed on the inner circumferential surface in a manner extending from the track roller rolling surface toward a widthwise outer side; lugs formed on an outer circumferential surface of the main body, the lugs respectively extending in a width direction between the cores from one end overlapping the track roller rolling surface in a thickness direction toward the other end overlapping a part in which the wings of the cores are embedded in the thickness direction. ... Bridgestone Corporation

Rfid wear sensing for tire applications

A tire includes a circumferential tread and a radio-frequency identification (rfid) chip disposed below the circumferential tread. The rfid chip includes a chip casing and a local antenna. ... Bridgestone Corporation

Motorcycle pneumatic tire

Disclosed is a motorcycle pneumatic tire comprising a plurality of blocks arranged on a tread surface, wherein: a plurality of wide blocks, each having a tire widthwise length larger than a tire circumferential length, are formed in at least a central region and intermediate regions, and a plurality of narrow blocks, each having a smaller tire widthwise length than each of the wide blocks, are formed in at least the intermediate regions; and the following relations are satisfied: 1.5≤w1/l1≤4.0 . . ... Bridgestone Corporation

Vibration-damping rubber composition and vibration-damping rubber

Provided is an anti-vibration rubber composition comprising a diene rubber, a silane coupling agent having at least one of a structural unit represented by general formula (1) and a structural unit represented by general formula (2), carbon black, and silica, at a blending ratio of carbon black (a) to silica (b), i.e. (a)/(b), of 10/90 to 45/55 (mass ratio). ... Bridgestone Corporation

Tire

Provided is a tire capable of improving the wear resistance. The tire comprises: a case portion comprising: an inner cylindrical member; an outer cylindrical member surrounding the inner cylindrical member from a tire radial outer side; and a plurality of connecting members arranged between the inner cylindrical member and the outer cylindrical member and connecting the two cylindrical members; and a tread portion having a tread rubber disposed on a tire radial outer side of the outer cylindrical member, wherein: when a portion of the tread rubber located on a tire radial outer side of a junction of the connecting members joined to the outer cylindrical member is defined as a tread rubber junction, a wear resistance of a first portion of the tread rubber inclusive of the tread rubber junction is larger than a wear resistance of a second portion of the tread rubber other than the first portion.. ... Bridgestone Corporation

Copolymer end-functionalized with functional silane, compositions thereof and related processes

Disclosed herein are copolymers end-functionalized with functionalized silanes of specified structure, rubber compositions comprising the copolymer, and related processes for preparing the end-functionalized copolymer. The present disclosure also relates to tires having at least one component (e.g., a tread) containing the end-functionalized copolymer or a rubber composition thereof. ... Bridgestone Corporation

Tire mold and method for manufacturing tire mold

Tire mold subject to least energy loss from heat dissipation during a curing process and thus capable of improving a curing efficiency, the tire mold has hollow cavities therein and a heating medium that circulates inside the hollow cavities, thereby heating a tire through the mold.. . ... Bridgestone Corporation

Reaction force measuring device, degradation diagnosing method and degradation diagnosing device

Provided is a reaction force measuring device comprising: a receiving portion 12; a movable portion 13 arranged in a manner spaced from the receiving portion 12 and capable of moving toward the receiving portion 12, the movable portion having a sandwiching space a formed between itself and the receiving portion 12, into which sandwiching space a hose h can be inserted from a direction crossing a longitudinal direction of the hose; and a measuring portion 14 configured to measure a reaction force of the hose h generated when the hose is pressed and applied with a load as the movable portion 13 moves toward the receiving portion 12.. . ... Bridgestone Corporation

Tire having a conductive insert

A tire includes a body ply extending from a first bead region to a second bead region and a conductive ply disposed radially above the body ply. The tire further includes a gum strip having a top end in contact with the conductive ply and a bottom end located in the first bead region.. ... Bridgestone Corporation

Tire having a conductivity path

A tire includes a pair of beads and a crown region including a circumferential tread disposed radially above a circumferential belt. The tire further includes a pair sidewalls extending from the pair of beads to the crown region. ... Bridgestone Corporation

Tire

A tire provides improved traction performance on farm fields while retaining traveling stability and vibration-damped ride quality on a pavement. The tire has a center region extending in the tire circumferential direction within a range of 15% of the tread width on the left and right sides of the tire axial center of the tread and shoulder regions extending in the tire circumferential direction within a range of 15% of the tread width from the respective edges of the tread toward the tire axial center. ... Bridgestone Corporation

Golf ball

To provide a golf ball that ensures both an improved durability and an extended flight distance, in which cracks or breakage of a core can be prevented while making the hardness of the core surface greater so as to obtain the greater difference in hardness between the core surface and the core center. The golf ball of the present invention includes a core and a cover that surrounds the core, in which the core includes a base rubber and an unsaturated carboxylic acid or its salt as a co-crosslinking agent, the core has a surface hardness of 80 or more in terms of jis-c hardness, and the unsaturated carboxylic acid or its salt contained in a region ranging from a surface of the core toward its center by less than 2 mm has an average particle diameter of less than 90 μm.. ... Bridgestone Corporation

Golf ball

In a golf ball having a core and a cover consisting of a plurality of layers that encases the core, adhesion between adjoining cover layers is improved by judicious selection of the materials making up the cover layers, providing the ball with an improved durability to impact without diminishing the ball initial velocity.. . ... Bridgestone Corporation

Colored golf ball

A colored golf ball has improved luxurious appearance without impairing its visibility. The colored golf ball of the present invention includes a core; a cover placed around the core having dimples formed on its surface; and a coating layer placed on top of the cover, in which the coating layer includes a polymer matrix having a bright material dispersed therein, and an l0 value, which represents an l value in the lab color system of the colored golf ball before being covered with the coating layer, is 25 or less, and the difference Δl between the l0 value and an l1 value, which represents an l value in the lab color system of the colored golf ball after being covered with the coating layer, is 5 or more.. ... Bridgestone Corporation

06/28/18 / #20180178070

Golf ball

A golf ball has arranged thereon one or more dimples having a cross-sectional shape specified by a particular sequence of steps, and the total number of dimples on the ball surface is from 250 to 380. This ball has a reduced air resistance during flight, enhancing the aerodynamic performance and enabling an increased distance to be achieved.. ... Bridgestone Corporation

06/28/18 / #20180178069

Golf ball

In a golf ball having numerous dimples on its surface, at least a given proportion of the dimples are optimal dimples having momentum thicknesses smaller than those of reference model dimples, thereby increasing the aerodynamic performance at the ball surface and enabling an improved flight performance to be achieved.. . ... Bridgestone Corporation

06/21/18 / #20180171119

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 rosin based resin and a carbon black, wherein: a compounding amount of the rosin based resin is 3 parts by mass or more per 100 parts by mass of the diene based rubber.. ... Bridgestone Corporation

06/21/18 / #20180171117

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 chlorinated paraffin and a carbon black, wherein: a compounding amount of the chlorinated paraffin is 3 parts by mass or more per 100 parts by mass of the diene based rubber.. ... Bridgestone Corporation

06/21/18 / #20180171116

Tire and method of manufacturing rubber composition

This disclosure is to provide a method of manufacturing a rubber composition comprising kneading a rubber composition that includes 100 parts by mass (pbm) of a rubber component (a) including 50 mass % or more of natural rubber, 5-50 pbm of at least one kind of thermoplastic resin (b) selected from among c5-based resins, c5-c9-based resins, c9-based resins, terpene-based resins, terpene-aromatic compound-based resins, rosin-based resins, dicyclopentadiene resins, and alkylphenol-based resins; 20-120 pbm of a filler (c) including silica; at least one kind of vulcanization accelerator (d) selected from among guanidines, sulfenamides, thiazoles, thiourea and diethyl thiourea; a silane coupling agent (e); and a vulcanizing agent (f). The kneading comprises a kneading stage a for kneading components (a)-(c), part or all of component (d), and 2 pbm or more of component (e), and a kneading stage b for kneading component (f) with a kneaded product of the kneading stage a.. ... Bridgestone Corporation

06/21/18 / #20180171053

Functionalized polymer, process for preparing and rubber compositions containing the functionalized polymer

Disclosed herein are a functionalized diene monomer-containing polymer containing first and second functionalizing groups, processes for preparing the functionalized polymer, and rubber compositions containing the functionalized polymer. The functionalized polymer contains polymer chains comprises of at least one conjugated diene monomer optionally in combination with at least one vinyl aromatic monomer wherein each polymer chain is functionalized at its chain end with at least the first functionalizing group and is coupled via the first functionalizing group to the second functionalizing group.. ... Bridgestone Corporation

06/21/18 / #20180170123

Uv-curable rubber as antenna component of the tread

The present disclosure relates to a pneumatic tire having at least one electrically conductive pathway capable of dissipating electrostatic charges generated in a vehicle to a road surface while achieving low rolling resistance and improved wet traction tire performances. The pneumatic tire has a tread portion which includes a tread cap layer forming a ground contacting surface and a tread base layer underlying the tread cap layer. ... Bridgestone Corporation

06/21/18 / #20180170118

Tire with magnetic tread detection

A tire includes at least one annular structure configured to interface with a wheel. The tire also includes a circumferential tread disposed in a crown region of the tire and a package having magnetic particles and an erodible medium, disposed within the circumferential tread. ... Bridgestone Corporation

06/21/18 / #20180170114

Tire

A tire 10 has: plural main grooves 18, 20 that extend in a tire circumferential direction; an inner side intermediate land portion 26 (land portion) that is demarcated in a tire transverse direction by the main grooves 18, 20; sipes s that communicate with a tread surface 34 side of the inner side intermediate land portion 26, and that have two arc-shaped sipe portions s1, s2 whose convex directions as seen from the tread surface 34 are directions opposite to one another in the tire circumferential direction, whose convex directions are directed toward a tire transverse direction central side of the inner side intermediate land portion 26, and that communicate with the main grooves 18, 20; and chamfered portions 111, 112, 121, 122 that are provided at the land portion ends that are at the tread surface 34 side and that run along the sipes s.. . ... Bridgestone Corporation

06/21/18 / #20180170113

Pneumatic tire

A pneumatic tire comprising on a tread surface 1 a plurality of blocks 7, wherein: the blocks have an inclined groove 43 formed thereon; the inclined groove has a connecting portion 43a connected to the circumferential main grooves, a wide-width portion 43b connected to the connecting portion, and a narrow-width portion 43c connected to the wide-width portion; the wide-width portion and the narrow-width portion have inclination angles with respect to the tire circumferential direction smaller than the connecting portion; the blocks have a sipe 52a formed thereon, the sipe having one end opening to the connecting portion and the other end opening to the circumferential main grooves; and the sipe has a bent portion.. . ... Bridgestone Corporation

06/21/18 / #20180170108

Tire

Provided is: a tire includes a circular tire frame formed from a resin material, in which the resin material contains a polyamide-based thermoplastic elastomer and carbon black, and the content of the carbon black is more than 0% and less than 1% by mass with respect to the resin material.. . ... Bridgestone Corporation

06/21/18 / #20180170107

Tire with tensioned spokes

A nonpneumatic tire includes an upper ring and a plurality of spokes extending from the upper ring. At least one reinforcement embedded in each spoke, wherein each reinforcement is constructed of a material that shrinks in length by 0.1% to 10% when subjected to a temperature between 38° c. ... Bridgestone Corporation

06/21/18 / #20180170105

Tire

A tire has excellent wet performance without leading to a reduction in steering stability. The tire includes a tread portion and a pair of bead portions each with a bead core and a bead filler disposed on the radial outside of the bead core. ... Bridgestone Corporation

06/21/18 / #20180170095

Tire with tensioned spokes

A nonpneumatic tire includes a tread portion, an upper ring, and a plurality of spokes extending radially downward from the upper ring. Each spoke terminates at a lower end having a spoke mount configured to engage a corresponding hub mount. ... Bridgestone Corporation

06/21/18 / #20180169985

Tire and method for manufacturing tire

Provided are: a tire including: a tire frame; and a reinforcing metal cord member that is wound at least on the outer circumference of the tire frame, wherein at least a portion of the reinforcing metal cord member is coated with a coating composition via an adhesion layer that contains a polyamide-based adhesive and has a melting point of from 160° c. To 200° c., the coating composition containing at least one thermoplastic material selected from polyamide-based thermoplastic resins having a melting point of from 160° c. ... Bridgestone Corporation

06/21/18 / #20180169902

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 suppressing the entry of rubber into an air vent hole and a method for producing such a rubber article mold are provided. The rubber article mold includes air discharge means for discharging air from a molding-surface side for molding a rubber article to a back-surface side. ... Bridgestone Corporation

06/21/18 / #20180169471

Selection support apparatus, selection support system, and selection support method

A selection support apparatus includes an obtaining unit obtaining a measurement result of a golf swing movement of a golfer, and a selection unit selecting, from a plurality of types of club characteristics of a golf club, a club characteristic suitable for the golfer based on the measurement result. The selection unit selects a club characteristic suitable for the golfer based on machine learning results of teacher data indicating a club characteristic suitable for a golf swing movement of each tester of a plurality of testers.. ... Bridgestone Corporation

06/14/18 / #20180163027

Cured guayule rubber containing compositions and method for preparing same

Provided herein are cured rubber compositions containing guayule natural rubber with 2.5-4 weight % resin and fillers. By the use of a specified cure package that contains increased amounts of sulfur and accelerator, the cured rubber compositions are found to exhibit strain induced crystallization (as can be observed by x-ray diffraction). ... Bridgestone Corporation

06/14/18 / #20180163017

Shea butter-containing rubber compositions and related methods

Disclosed herein are rubber compositions comprising shea butter and a rubber, and tires (and tire components) made from the rubber compositions. The rubber component comprises at least one conjugated diene monomer-containing polymer or copolymer. ... Bridgestone Corporation

06/14/18 / #20180163013

Processes for the removal of rubber from non-hevea plants

Provided herein are organic solvent-based processes for the removal of rubber from non-hevea plants such as guayule shrubs. By the use of the processes, solid purified rubber can be obtained that contains 0.05-0.5 weight % dirt, 0.2-1.5 weight % ash, and 0.1-4 weight % resin (when it has been dried so as to contain 0.8 weight % volatile matter).. ... Bridgestone Corporation

06/14/18 / #20180162645

Rubber composition, laminate and conveyor belt

Provided is a rubber composition having excellent adhesiveness with particularly reinforcing members in environmental degradation, and capable of bringing high peel operability therewith. The rubber composition of this disclosure is obtainable by compounding a rubber component containing a diene based rubber, a wet silica, a carbon black and a calcium carbonate, wherein: a compounding amount of the wet silica is 3 parts by mass or more per 100 parts by mass of the diene based rubber; and a compounding amount of the calcium carbonate is 10 parts by mass or more and 120 parts by mass or less per 100 parts by mass of the diene based rubber.. ... Bridgestone Corporation

06/14/18 / #20180162177

Load derivation method

A load derivation method includes: a distance measurement step of measuring, by a displacement meter attached to a rim, a distance from the displacement meter to an inner surface of a tire; an internal pressure measurement step of measuring an internal pressure of the tire, by a sensor attached in a chamber of the tire; and a load derivation step of deriving, by a derivation section, a load on the tire during running, based on the measured distance and the measured internal pressure.. . ... Bridgestone Corporation

06/14/18 / #20180162171

Tyre tread

A tyre tread (1) having a sculptured external surface including see-through sipes (71, 72, 73) at an intermediate land region (4), wherein each of such sipes extends according to a straight line defining a low inclination angle (α, β, γ) with respect to a tread width direction (w), such sipes being also surrounded by respective chamfered areas (81, 82, 83) (fig. 1).. ... Bridgestone Corporation

06/14/18 / #20180162166

Tire

A tire comprising a tread surface of the tire partitioned into a plurality of land portions by a plurality of circumferential grooves along an equatorial plane of the tire and tread edges, wherein: among the plurality of land portions, one or both land portions adjacent to the tread edges have a plurality of sipes opening to at least one of either the tread edges or the circumferential grooves; a tackiness in a watery environment is 1.96 n or less; and a tackiness in a 90° c. Environment is 2.16 n or more.. ... Bridgestone Corporation

06/14/18 / #20180162165

Pneumatic tire for airplanes

Provided is an airplane pneumatic tire whose durability is increased by improvement in heat build-up. The airplane pneumatic tire includes: a tread section having a plurality of circumferential grooves; a carcass toroidally extending from the tread section to a pair of bead sections through a pair of side wall sections; and a belt composed of at least one belt layer arranged on the outer side of a crown portion of the carcass, wherein, when the maximum width of the belt in the tire width direction is defined as w, a rubber having a 25% modulus at 25° c. ... Bridgestone Corporation

06/14/18 / #20180161645

Golf club head

A golf club head includes a head body and a face member. The head body includes a body face, a sole, and a crown. ... Bridgestone Corporation

06/14/18 / #20180161644

Golf club head

A hollow golf club head includes a face defining a front of the golf club head, a sole, and a crown. The crown includes a front depression formed in the outside surface of the crown and a rear depression formed in the inside surface of the crown. ... Bridgestone Corporation

06/07/18 / #20180155535

Rubber compositions containing viscosity modifier and related methods

Disclosed herein are rubber compositions containing a viscosity modifier and related methods such as for preparing a rubber composition containing a viscosity modifier. The viscosity modifier is an olefin copolymer and may be utilized in a neat or in an oil-extended form. ... Bridgestone Corporation

06/07/18 / #20180155460

Aminosilane initiators and functionalized polymers prepared therefrom

Metallated aminosilane compounds for use as functional initiators in anionic polymerizations and processes for producing an aminosilane-functionalized polymer using the metallated aminosilane compounds to initiate anionic polymerization of at least one type of anionically polymerizable monomer. Preferred use of the metallated aminosilane compounds results in rubber compositions for use in tires comprising an aminosilane functionalized polymer.. ... Bridgestone Corporation

06/07/18 / #20180154959

Crawler

A crawler includes crawler body formed by an elastic body shaped into an endless loop, a tensile body embedded in the crawler body and wound around a circumferential direction of the crawler body, guide projections formed at an inner circumferential surface of a width direction central portion of the crawler body and spaced apart in the circumferential direction of the crawler body, a flat face, upon which a rotating wheel provided at a vehicle rolls, forming an inner circumferential surface further toward a width direction outer side of the crawler body than the guide projections and an inclined face, upon which the rotating wheel rolls, inclined from an outer side end portion of the flat face in a crawler body width direction such that a thickness of the crawler body gradually increases toward the width direction outer side and circumferential inner side of the crawler body.. . ... Bridgestone Corporation

06/07/18 / #20180154958

Elastic crawler

An elastic crawler includes an elastic crawler body and plural cord layers. The elastic crawler body is shaped into an endless loop. ... Bridgestone Corporation

06/07/18 / #20180154705

Tire having a conductivity path

A tire includes a body ply sheet having a rubber core defined by a top surface having a length and a width, a bottom surface having substantially the same length and width, and side surfaces having a common height. The rubber core is further defined by a top rubber layer and a bottom rubber layer. ... Bridgestone Corporation

06/07/18 / #20180154703

Pneumatic tire

A pneumatic tire comprises: a first block 71 located on a tire equatorial plane and having a recess 62 that inclines with respect to a tire width direction; and a second block 72 located to face the recess of the first block.. . ... Bridgestone Corporation

06/07/18 / #20180154700

Tire

To provide a tire capable of suppressing shoulder uneven wear effectively when the tire is mounted to a vehicle having high vehicle height. In a tire according to the present invention, a width direction sipe (100) is formed. ... Bridgestone Corporation

06/07/18 / #20180154693

Tire and method of producing the same

A tire including a tire frame, which is toric and is formed with a resin material containing a thermoplastic resin; an adhesion layer, which is formed with a composition including a polythiol compound, a polyisocyanate compound, and a radical generator, and in which a ratio (s/n) of the number (s) of sulfur atoms contained in the adhesion layer to the number (n) of nitrogen atoms contained in the adhesion layer is three or more; and an exterior component, which contains a rubber, and which is mounted on the tire frame via the adhesion layer such that at least part of the rubber touches the adhesion layer.. . ... Bridgestone Corporation

06/07/18 / #20180154236

Simulation apparatus, simulation method, and simulation system

A simulation apparatus includes an obtaining unit configured to obtain a measurement result of a test shot of a first golf club performed by a testing golfer, and a calculation unit configured to calculate a simulated ball-striking result which is obtained if the testing golfer strikes a golf ball by a second golf club which has a specification different from the first golf club. The calculation unit determines a swing characteristic of the testing golfer based on the measurement result. ... Bridgestone Corporation

06/07/18 / #20180154230

Golf club set

A golf club set includes a plurality of golf clubs having different loft angles. The plurality of golf clubs have the same lie angle. ... Bridgestone Corporation

06/07/18 / #20180154219

Multi-piece solid golf ball

In a multi-piece solid golf ball having a two-layer core with an inner core layer and an outer core layer, a cover, and at least one intermediate layer between the core and cover, the inner and outer core layers are formed of different rubber compositions, and the intermediate layer and the cover are formed of different resin compositions. The inner core layer diameter, the hardness relationship between the surface of the outer core layer and the center of the inner core layer, and the material hardness of the intermediate layer fall within specific ranges. ... Bridgestone Corporation

06/07/18 / #20180154218

Multi-piece solid golf ball

In a golf ball having a core, an outermost layer and an intermediate layer therebetween, the intermediate layer is formed of a thermoplastic resin composition that includes (a) an ionic olefin-methacrylic acid-unsaturated carboxylic acid ester copolymer, (b) a nonionic olefin-acrylic acid copolymer, (c) an organic acid or a metal salt thereof, and (d) a basic inorganic metal compound, and the outermost layer is formed of a thermoplastic resin composition that includes (a) a specific ionic olefin-unsaturated to carboxylic acid copolymer and (h) a specific ionic olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester copolymer. The ratio (tan δ) between the tensile storage modulus (e′) and the tensile loss modulus (e″) in a dynamic viscoelasticity test on the outermost layer-forming resin composition conducted under specific conditions is not more than 0.150. ... Bridgestone Corporation

05/31/18 / #20180149226

Vibration-damping device

A vibration-damping device (1) of the present invention includes a tubular first attachment member (11), a second attachment member (12) that is attached to any one of a vibration generating portion and a vibration receiving portion, an elastic body (13) that connects the first attachment member and the second attachment member with each other, and a bracket (b) that is connected to the remaining one of the vibration generating portion and the vibration receiving portion and is press-fitted into the first attachment member. The second attachment member includes a stopper wall portion (14) which surrounds the first attachment member from radially outside. ... Bridgestone Corporation

05/31/18 / #20180148568

Pneumatic tire having advantageous low temperature performance characteristics

A vulcanizable composition for manufacturing a tire component includes a vulcanizable rubber, a curative for the rubber, and a dihydrocarbyl succinate.. . ... Bridgestone Corporation

05/31/18 / #20180148549

Golf ball

A golf ball contains, as a structural element therein, a molded and crosslinked material obtained from a rubber composition which includes: (a) a base rubber (b) an α,β-unsaturated carboxylic acid and/or a metal salt thereof, (c) a crosslinking initiator, and (d) a metal carboxylate in which the carboxylic acid bonded to metal is of two or more different types and at least one of the carboxylic acids has 8 or more carbon atoms. The rubber composition has an improved processability in kneading and other operations, and the decrease in the initial velocity of the ball core resulting from the inclusion of additives can be held to a minimum.. ... Bridgestone Corporation

05/31/18 / #20180148548

Rubber composition for golf balls and preparation thereof

A rubber composition for golf balls includes (i) a base rubber, (ii) an unsaturated carboxylic acid and/or a metal salt thereof, (iii) a crosslinking initiator, and (iv) cellulose nanofibers. This rubber composition can further improve the durability of the ball without requiring the use of high-cost fibrous substances as compounding ingredients. ... Bridgestone Corporation

05/31/18 / #20180148113

Crawler

A main cord layer is embedded in a crawler main body, and a first bias cord layer, a second bias cord layer, a third bias cord layer and a fourth bias cord layer are embedded at an outer peripheral side of the main cord layer. Bias cords of the second bias cord layer and bias cords of the third bias cord layer are inclined in a direction that is opposite, with respect to a crawler circumferential direction, bias cords of the fourth bias cord layer that are inclined with respect to the crawler circumferential direction.. ... Bridgestone Corporation

05/31/18 / #20180148112

Elastic crawler and elastic crawler device

The elastic crawler (1) according to this disclosure comprises: an endless belt-like main body (2) having elasticity; a plurality of cores (3) embedded in a circumferential direction of the main body (2); a plurality of lugs (5) each being arranged in a manner protruding from an outer circumferential surface of the main body (2) and extending between the plurality of cores (3) adjacent in the circumferential direction of the main body (2); and an inner circumferential concavity (g1) formed at a position on an inner circumferential surface of the main body (2) overlapping, in a thickness direction of the main body (2), an outer circumferential concavity (g2) of each of the lugs (5). The elastic crawler device comprises: the elastic crawler (1); and a drive wheel, an idle wheel and a rolling wheel.. ... Bridgestone Corporation

05/31/18 / #20180148110

Crawler

A crawler includes a crawler main body (a rubber crawler main body (12)), a tensile body (70), guide protrusions (16), and flat surfaces (40). The tensile body (70) is provided with a flat portion (72) that is arranged along a width direction of the crawler main body and a slanting portion (74) that is slanted and arranged at a width direction outer side of the crawler main body relative to the flat portion (72). ... Bridgestone Corporation

05/31/18 / #20180147889

Pneumatic tire

At a pneumatic tire (11), in a pneumatic tire in which a reinforcing layer (11) is structured from at least one reinforcing ply (53) in which are embedded plural reinforcing cords (54) that are formed from steel and are inclined with respect to a tire equator s, an inclination angle a of the reinforcing cords (54) with respect to the tire equator s is within a range of 40 to 90°, and a compressive rigidity f per 50 mm width of a reinforcing layer (52) in a direction parallel to the reinforcing cords (54) is within a range of 1000 to 2400 n.. . ... Bridgestone Corporation

05/31/18 / #20180147888

Rubber-covered textile cords, tires containing same, and related methods

The present disclosure is directed to textile cords covered with a rubber composition of specified composition, tires having at least one component comprising the rubber-covered textile cords, and related methods for increasing aged cord coverage of rubber-covered textile cords and for preparing the rubber-covered textile cords. The rubber composition of specified composition includes silica filler in an amount of up to 20 phr and silane coupling agent in an amount of up to 5 phr.. ... Bridgestone Corporation

05/31/18 / #20180147887

Tire

A tire has a rolling resistance that is reduced at both low and high temperatures and that exhibits a small difference between low and high temperatures. The tire includes a tread portion and a pair of bead portions each with a bead core and a bead filler disposed on the radial outside of the bead core. ... Bridgestone Corporation

05/31/18 / #20180147453

Multi-piece solid golf ball

In a multi-piece solid golf ball which includes a core of at least one layer, a cover of at least one layer, and at least one intermediate layer interposed between the core and the cover, the cover is composed primarily of polyurethane and the following parameters are controlled within specific ranges: core deflection, melt flow rate of intermediate layer material, thickness of intermediate layer, thickness and shore d hardness of cover, combined thickness of intermediate layer and cover, and the value of (shore d hardness of cover material)−(shore d hardness of intermediate layer material). This golf ball has a good, soft feel at impact and lowers the rate of spin on full shots, achieving a good distance.. ... Bridgestone Corporation

05/31/18 / #20180146788

Seat pad

A seat pad (10) of the present invention includes a placement surface (11). A lateral slit portion (15) which extends from an outer side of the seat pad (10) toward an inner side thereof is formed in a first lateral direction (b1) along the placement surface (11), and the lateral slit portion (15) is curved and thereby protrudes in a thickness direction (h) orthogonal to the placement surface (11).. ... Bridgestone Corporation

05/31/18 / #20180146787

Seat pad

A seat pad (10) of the present invention includes a placement surface (11). A lateral slit portion (15) which extends from an outer side of the seat pad (10) toward an inner side thereof is formed in a first lateral direction (b1) along the placement surface (11), and at least a portion of the lateral slit portion (15) gradually becomes larger from the outer side of the seat pad (10) toward the inner side thereof in a thickness direction (h) orthogonal to the placement surface (11) along the first lateral direction (b1).. ... Bridgestone Corporation

05/24/18 / #20180142125

Golf ball paint composition

. . A golf ball paint composition includes primarily a urethane paint containing polyol as a base resin and polyisocyanate as a curing agent. Two types of polyester polyol are used as the polyol, and the composition has an elastic work recovery of at least 70%. ... Bridgestone Corporation

05/24/18 / #20180142091

Hose rubber composition and hose

The hose rubber composition of this disclosure comprises a rubber component, a carbon black and a plasticizer component, wherein: a chloroprene rubber is contained at an amount of 60 parts by mass or more in 100 parts by mass of the rubber component; the carbon black is compounded at an amount of more than 50 parts by mass in 100 parts by mass of the rubber component; and the plasticizer component contains a flame retardant plasticizer, the flame retardant plasticizer being compounded at an amount of 2 parts by mass or more in 100 parts by mass of the rubber component.. . ... Bridgestone Corporation

05/24/18 / #20180142090

Hose rubber composition and hose

This disclosure aims to provide a hose rubber composition capable of ensuring the flame retardance and simultaneously achieving both the tear resistance and the flexibility after vulcanization. The hose rubber composition of this disclosure comprises a rubber component and a carbon black, wherein: a chloroprene rubber is contained at an amount of 60 parts by mass or more in 100 parts by mass of the rubber component; the carbon black is compounded at an amount of more than 30 parts by mass and less than 80 parts by mass per 100 parts by mass of the rubber component; and the carbon black contains 13 mass % or more of a specific carbon black having an iodine adsorption of 100 to 160 mg/g and a dbp oil absorption of 70 to 180 ml/100 g.. ... Bridgestone Corporation

05/24/18 / #20180142085

Rubber composition, vibration reduction rubber composition, and vibration reduction rubber

The present invention provides a rubber composition and an anti-vibration rubber composition both comprising: a rubber component containing at least a natural rubber and a high-cis isoprene rubber having a content of cis-1,4 bond of 95% by mass or more; a carbon black having an iodine adsorption number of 35 mg/g or less and a dbp adsorption number of 75 ml/100 g or less; a silica having a nitrogen adsorption specific surface area (the bet method) of 80 m2/g or more and less than 240 m2/g; and a compound represented by the following general formula (1), (wherein m and n each independently represent an integer of 1 or more), and an anti-vibration rubber obtained by curing the rubber composition. The rubber composition and the anti-vibration rubber composition have a low dynamic magnification, are excellent in fatigue property and can retain scorch resistance (work stability).. ... Bridgestone Corporation

05/24/18 / #20180141390

Tire

A tire including a pattern region and plural unit patterns. The pattern region is formed at an outer surface of a tire and includes a base. ... Bridgestone Corporation

05/24/18 / #20180141381

Belt assemblies coated with a magnetic rubber composition and tires including the same

Disclosed herein are magnetic rubber compositions including magnetic particles and a rubber, and tires and tire components made from the magnetic rubber compositions. The magnetic rubber compositions are used to form belt assemblies having non-metal reinforcing components, such as fiberglass. ... Bridgestone Corporation

05/24/18 / #20180141379

Tire

Provided is a tire capable of improving the ride comfort. The tire comprises: a case portion comprising: an inner cylindrical member; an outer cylindrical member surrounding the inner cylindrical member from a tire radial outer side; and a plurality of connecting members arranged between the inner cylindrical member and the outer cylindrical member and connecting the two cylindrical members; and a tread portion having a tread rubber disposed on a tire radial outer side of the outer cylindrical member, wherein: when a portion of the tread rubber located on a tire radial outer side of a junction of the connecting members joined to the outer cylindrical member is defined as a tread rubber junction, a jis hardness of a first portion of the tread rubber inclusive of the tread rubber junction is smaller than a jis hardness of a second portion of the tread rubber other than the first portion.. ... Bridgestone Corporation

05/24/18 / #20180141290

Tyre sealant layer

A compound for a tyre sealant layer comprising at least one polymer base consisting of an essentially saturated polymer and a filler, which in turn comprises kraft lignin.. . ... Bridgestone Corporation

05/17/18 / #20180134815

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.. ... Bridgestone Corporation

05/17/18 / #20180134494

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.. ... Bridgestone Corporation

05/17/18 / #20180134333

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.. . ... Bridgestone Corporation

05/17/18 / #20180134085

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.. ... Bridgestone Corporation

05/17/18 / #20180134082

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.. . ... Bridgestone Corporation

05/17/18 / #20180134081

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.. . ... Bridgestone Corporation

05/17/18 / #20180133985

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.. ... Bridgestone Corporation

05/17/18 / #20180133934

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.. ... Bridgestone Corporation

05/17/18 / #20180133932

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. ... Bridgestone Corporation

05/17/18 / #20180133566

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. ... Bridgestone Corporation

05/17/18 / #20180133561

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.. ... Bridgestone Corporation

05/17/18 / #20180133560

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.. . ... Bridgestone Corporation

05/17/18 / #20180132620

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).. . ... Bridgestone Corporation

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. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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).. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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).. . ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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). ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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).. ... Bridgestone Corporation

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. . ... Bridgestone Corporation

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. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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).. . ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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. ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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%.. . ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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). ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. ... Bridgestone Corporation

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.. . ... Bridgestone Corporation

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.. . ... Bridgestone Corporation








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