Patents Assigned to Bridgestone Corporation
  • Publication number: 20200240777
    Abstract: A method of determining a road surface condition includes: acquiring, when determining a condition of a road surface being in contact with a tire from a time-varying waveform of vibration of the running tire, the time-varying waveform of vibration having been detected by a vibration detecting means, a plurality of intrinsic vibration modes, from data of the time-varying waveform of vibration of the tire, using an algorithm of empirical mode decomposition; selecting an arbitrary intrinsic vibration mode from the plurality of intrinsic vibration modes; calculating a statistic amount from the distribution of feature data calculated by performing Hilbert transform on the selected intrinsic vibration mode to set the statistic amount as a feature amount; and determining the road surface condition from the feature amount and a feature amount obtained in advance for each road surface condition.
    Type: Application
    Filed: April 26, 2018
    Publication date: July 30, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Keita ISHII
  • Publication number: 20200239602
    Abstract: 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).
    Type: Application
    Filed: April 17, 2020
    Publication date: July 30, 2020
    Applicant: Bridgestone Corporation
    Inventors: Yingyi Huang, Mark W. Smale, Robert W. White, Hiroshi Mouri, William M. Cole, Michael R. Hartzell, Taigyoo Park
  • Publication number: 20200238762
    Abstract: A tire having a tire frame, the tire frame comprising a thermoplastic elastomer as a resin material, and the thermoplastic elastomer having a value of orientation f, as measured by a small angle X-ray scattering method, of from ?0.08 to 0.08.
    Type: Application
    Filed: April 16, 2020
    Publication date: July 30, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Hiromasa YAMASHITA
  • Publication number: 20200239675
    Abstract: A multicomponent copolymer according to the present invention contains a non-conjugated polyene unit, a non-conjugated olefin unit and an aromatic vinyl unit, wherein the content of the aromatic vinyl unit is 5% by mass or more and less than 30% by mass. A crosslinked rubber composition having a high strength, as compared with the case where EPDM is used, while having high weather resistance, a multicomponent copolymer useful for producing a rubber product, and a method for producing the multicomponent copolymer are provided.
    Type: Application
    Filed: April 15, 2020
    Publication date: July 30, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Olivier TARDIF, Yasuo HORIKAWA
  • Publication number: 20200238649
    Abstract: A bead member for a tire, including: a bead wire; a first bead filler that is in contact with the bead wire directly or via another layer and is arranged in a region including at least a region at an outer side of the bead wire in a tire radial direction; and a second bead filler that is in contact with the first bead filler directly or via another layer and is arranged in a region including at least a region at an outer side of the first bead filler in the tire radial direction, the first bead filler including a resin A, the second bead filler including a resin B, and the resin A having a melting point higher than that of the resin B.
    Type: Application
    Filed: April 2, 2020
    Publication date: July 30, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Hiroyuki FUDEMOTO, Takumi YAMADA, Yukinori NAKAKITA, Takahiro SUZUKI
  • Publication number: 20200238765
    Abstract: Provided is a motorcycle tire that further improves wet grip performance during turning while ensuring rigidity during turning.
    Type: Application
    Filed: April 10, 2020
    Publication date: July 30, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Takamitsu NAKAMURA, Yasufumi TOKITOH, Naoki SHIMAMURA
  • Patent number: 10723179
    Abstract: A tire has a tread portion including a groove extending in the tire-circumferential direction, a first land portion positioned to the inner-side in the tire-width direction and having a first groove wall of the groove, and a second land portion having a second groove wall. Protrusions extend from the first groove wall to the second groove wall on bottom of the groove. In a tread-surface view, the protrusion has a linear portion and a curved portion that is contiguous with the linear shaped portion. A slit crossing the protrusion is formed in at least one of the end parts of the protrusions. The first land portion includes shallow grooves having shallower depth than the groove and extending at an angle with respect to the tire-width direction. The linear portion of the protrusion extends at an angle in the same direction, with respect to the tire-circumferential direction, as the shallow grooves.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: July 28, 2020
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Midori Matsunaga
  • Patent number: 10723817
    Abstract: 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.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: July 28, 2020
    Assignee: Bridgestone Corporation
    Inventors: Terrence E. Hogan, Waruna C. B. Kiridena
  • Publication number: 20200231785
    Abstract: A silica-based nanomaterial consisting of particles of a Zn salt supported on the surface of silica nanoparticles. The Zn salt is chosen from between Zn3(PO4)2 and Zn2SiO4.
    Type: Application
    Filed: October 23, 2018
    Publication date: July 23, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Giancarlo COSSU, Maria Cecilia PALUMBI, Roberto COMPARELLI, Valerio MARGIOTTA
  • Publication number: 20200232534
    Abstract: The vibration-damping device includes a tubular first attachment member; a second attachment member; an elastic body that couples the first attachment member and the second attachment member to each other; and a partition member that partitions a liquid chamber within the first attachment member into a main liquid chamber having the elastic body in a portion of a barrier wall thereof, and an auxiliary liquid chamber. The partition member includes a membrane; a first orifice passage that includes a main liquid chamber-side passage, and an opposite liquid chamber-side passage; and a damping force difference increasing part that restrains any one of swelling deformation of the membrane toward the main liquid chamber side and swelling deformation of the membrane toward the opposite liquid chamber and increases a difference between a damping force generated when a bound load is input and a damping force generated when a rebound load is input.
    Type: Application
    Filed: October 11, 2018
    Publication date: July 23, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Hiroshi KOJIMA
  • Publication number: 20200231014
    Abstract: To provide a suspension arm having good rigidity and reduced weight, which includes a member A composed of a resin composition containing short fibers having a fiber length of less than 10 mm (short-fiber resin composition), and a member B composed of a resin composition containing continuous fibers having a fiber length of 10 mm or more (continuous-fiber resin composition).
    Type: Application
    Filed: April 2, 2020
    Publication date: July 23, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Kanji Tanaka, Norihiko Kaga, Yoichi Nishimuro, Gaku Yakushiji
  • Publication number: 20200231806
    Abstract: An aldehyde scavenger for polyurethanes, including a reducing agent, a basic compound, an amine polymer having amino group-containing repeating units, and water. The reducing agent is preferably a complex metal hydride, more preferably sodium borohydride, and the amine polymer having amino group-containing repeating units is preferably at least one amine polymer selected from the group consisting of polyvinylamine, polyvinylalkylamines, polyalkyleneimines, polyaniline and salts thereof.
    Type: Application
    Filed: July 31, 2018
    Publication date: July 23, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Naoko NISHIKITA, Hideharu SEGUCHI
  • Publication number: 20200230469
    Abstract: 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 ?,?-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.
    Type: Application
    Filed: March 18, 2020
    Publication date: July 23, 2020
    Applicants: Bridgestone Sports Co., Ltd., BRIDGESTONE CORPORATION
    Inventors: Tsuyoshi NAKAJIMA, Yuichiro OZAWA, Daisuke NAKAJIMA
  • Publication number: 20200231778
    Abstract: An object of the present disclosure is to provide a rubber composition having high wear resistance and being excellent in both workability and low-hysteresis loss properties. Specifically, the present disclosure provides a rubber composition comprising a rubber component and a hydrated silica, wherein: the hydrated silica contains aluminum and a surfactant.
    Type: Application
    Filed: June 5, 2018
    Publication date: July 23, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Yuzaburo YANO
  • Publication number: 20200231779
    Abstract: An object of the present disclosure is to provide: a rubber composition having excellent low hysteresis loss properties and snow-gripping capability without lowering the wet-gripping capability; and a tire using the rubber composition. To achieve the object, a rubber composition of the present disclosure has: a rubber component including therein 50 mass % or more of a natural rubber, and a modified styrene-butadiene rubber which contains 1 mass % to 20 mass % of styrene; a resin having a glass transition temperature (Tg) higher than 0° C.; and a low-temperature plasticizer having a glass transition temperature (Tg) lower than ?50° C.
    Type: Application
    Filed: August 27, 2018
    Publication date: July 23, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Seiichi TAHARA
  • Patent number: 10717021
    Abstract: Provided herein is a fractionator and related process for separating solubilized rubber from a co-solvent based miscella.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: July 21, 2020
    Assignee: Bridgestone Corporation
    Inventors: Robert W. White, Michael R. Hartzell
  • Patent number: 10717481
    Abstract: 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.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: July 21, 2020
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Youichi Kumano
  • Publication number: 20200224002
    Abstract: An object of the present disclosure is to provide a conductive urethane foam capable of curbing changes in hardness and impact resilience thereof between prior to and after being impregnated with a binder resin, while keeping a stable charge-imparting effect thereof. To achieve the object, the present disclosure proposes a conductive urethane foam including an urethane foam substrate material having a surface layer impregnated with a binder resin containing a conducting agent: wherein the binder resin contains a silicone resin.
    Type: Application
    Filed: July 23, 2018
    Publication date: July 16, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Hirokazu DOI
  • Patent number: 10710408
    Abstract: A rubber compound for treads comprising a styrene-butadiene rubber (SBR), carbon black and a vulcanization system. The filler comprises 5 to 30 phr of a thermoplastic polymer, preferably polylactic acid, having a Tg ranging from 50 to 70° C., a molecular weight (Mw) not exceeding 200,000 g/mol and a crystallinity not exceeding 0%.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: July 14, 2020
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Gianluca Forte, Claudia Aurisicchio, Giammatteo Gaeta
  • Patent number: 10711121
    Abstract: A rubber composition has: at least three types of diene polymers forming a plurality of polymer phases immiscible with each other; and silica, wherein: a diene polymer (B), of which glass transition temperature (Tg) is neither the highest nor the lowest among the diene polymers each having content of ?10% by mass with respect to the total mass of the diene polymers, has been modified by a compound containing silicon atom; the diene polymer (B) satisfies formula (i) shown below: St+Vi/2?33??(i) (In the formula, “St” represents content of bonded styrene (mass %) of the diene polymer (B) and “Vi” represents vinyl bond content (mass %) of a conjugated diene compound part of the diene polymer (B)); and the silica has content of ?25 parts by mass with respect to the total mass or 100 parts by mass of the diene polymers.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: July 14, 2020
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Hideyuki Nukaga