Patents Assigned to Bridgestone Corporation
  • LAMINATE AND PRODUCT
    Publication number: 20230265226
    Abstract: A laminated body 10 includes: a layer (C) 12 consisting of a composition (c) containing a copolymer that contains a conjugated diene unit and a non-conjugated olefin unit and contains 0 mol % of a butylene unit; and a layer (R) 14 consisting of a composition (r) containing an olefin-based resin, in which the layer (C) 12 is adjacent to the layer (R) 14. The laminated body 10 is excellent in a mechanical strength and impact resistance, and is easy to repair.
    Type: Application
    Filed: April 28, 2021
    Publication date: August 24, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Shojiro KAITA
  • Polyolefin grafted polydiene polymers, and methods of making and using same
    Patent number: 11718698
    Abstract: Embodiments of the present disclosure are directed to polyolefin grafted polydiene polymers, wherein the polyolefin grafted polydiene polymers comprises a polydiene having a polydiene polymer backbone, a polyolefin, and at least one sulfur containing functionalizing agent which grafts the polyolefin onto at least one non-terminal position on the polydiene polymer backbone.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: August 8, 2023
    Assignee: Bridgestone Corporation
    Inventors: Terrence E. Hogan, Arif O. Gozen, James D. Ulmer
  • PNEUMATIC TIRE
    Publication number: 20230241917
    Abstract: Provided is a pneumatic tire that has excellent durability and achieves both high load capacity and space-saving properties. This disclosure provides a pneumatic tire to be mounted on a vehicle, which includes a tread in contact with a road surface and a belt layer provided inside the tread in the tire radial direction, where the pneumatic tire has an outer diameter of 350 mm or more and 600 mm or less, and when the rim width of a rim wheel assembled to the pneumatic tire is defined as RW, and the tire cross-sectional width of the pneumatic tire is defined as SW, they satisfy the relationship of 0.78?RW/SW?0.88, and the pneumatic tire uses a rubber composition containing a rubber component containing 50% by mass or more of natural rubber and/or synthetic isoprene rubber, and syndiotactic 1,2-polybutadiene.
    Type: Application
    Filed: May 27, 2021
    Publication date: August 3, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Norihisa KANO
  • TIRE
    Publication number: 20230241928
    Abstract: A tire according to the present disclosure includes, on the tire outer surface, a first region including an uneven surface formed by a convex portion arranged throughout the first region, and a second region including an uneven surface formed by a plurality of ridges arranged in parallel throughout the second region, the second region being arranged adjacent to the first region. The minimum separation distance between apices of the convex portion in the first region is shorter than the minimum separation distance between apices of two adjacent ridges in the second region.
    Type: Application
    Filed: July 8, 2021
    Publication date: August 3, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Sotaro IWABUCHI
  • Polyurethane-containing tread rubber compositions and related methods
    Patent number: 11712926
    Abstract: Disclosed herein are tread rubber compositions containing a specified polyurethane, tires containing a tread made from the rubber compositions, and related methods of improving the wet and dry traction of a tire tread by using the polyurethane-containing rubber compositions. The polyurethane includes a saturated hydroxy-functionalized polydiene segment as diol.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: August 1, 2023
    Assignee: Bridgestone Corporation
    Inventors: Yaohong Chen, Mindaugas Rackaitis, Wei Zhao
  • Rubber composition and tire
    Patent number: 11701921
    Abstract: Provided is a rubber composition that achieves both wet performance and low loss property while delivering excellent dry handling performance. A rubber composition comprises: a rubber component; and a styrene-alkylene block copolymer, wherein a total styrene content of the styrene-alkylene block copolymer is 30 mass % or more.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: July 18, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Misa Aoki, Seiichi Tahara, Takuya Ogasawara
  • TIRE
    Publication number: 20230219375
    Abstract: A tire includes a first circumferential main groove 11 and a second circumferential main groove 12 in a tread surface 1. A resonator 21 is formed in an intermediate land portion 20 partitioned between the first circumferential main groove and the second circumferential main groove. The resonator has an auxiliary groove 211 whose both ends terminate within the intermediate land portion. The groove depths D1 of the first and second circumferential main grooves are 50% or less of the groove widths W2 of the first and second circumferential main grooves, respectively. The groove width W3 of the auxiliary groove of the resonator is 80% or less of the groove depth D1 of the first circumferential main groove.
    Type: Application
    Filed: May 6, 2021
    Publication date: July 13, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yoshiki NAKATA, Mayuko KARASAWA
  • PNEUMATIC TIRE
    Publication number: 20230220187
    Abstract: Provided is a pneumatic tire that has excellent fuel efficiency and rubber strength and combines high load capacity and space saving. A pneumatic tire mounted on a vehicle, comprises: a tread configured to come into contact with a road surface; and a belt layer located on an inner side of the tread in a tire radial direction, wherein an outer diameter of the pneumatic tire is 350 mm or more and 600 mm or less, the following relationship: 0.78?RW/SW?0.88 is satisfied, where RW is a rim width of a rim wheel to be attached to the pneumatic tire and SW is a tire section width of the pneumatic tire, and a rubber composition that contains: a rubber component containing a diene-based rubber; and a mercaptocarboxylic acid compound is used in the pneumatic tire.
    Type: Application
    Filed: May 27, 2021
    Publication date: July 13, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Tomoyuki KOSAI
  • Steel cord for reinforcing rubber article
    Patent number: 11685191
    Abstract: Provided is a steel cord for rubber article reinforcement which has excellent corrosion resistance and productivity without deterioration of adhesion with rubber. A steel cord (1) for rubber article reinforcement, in which plural steel filaments (2) are twisted together, includes: a core having at least one core filament (2c); and a sheath having at least one sheath layer formed by twisting at least one sheath filament (2s) around the core. In this steel cord (1), brass plating is performed on the steel filaments (2) and zinc plating is further performed on the outer circumference of the brass plating of the core filament (2c), and the steel filaments (2) have a diameter d of 0.1 mm to 0.6 mm.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: June 27, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Nobuhiro Ando
  • FLUORINE RUBBER COMPOSITION AND CROSSLINKED FLUORINE RUBBER PRODUCT
    Publication number: 20230192984
    Abstract: A bladder for tire vulcanizing containing a crosslinked fluoroelastomer obtained by peroxide-crosslinking a fluoroelastomer composition including a peroxide-crosslinkable fluoroelastomer (A), a carbon black (B), and a peroxide cross-linking agent (C), wherein the crosslinked fluoroelastomer has a hardness at 25° C. of 60 to 90, a number of foreign particles selected from the group consisting of lumps of carbon and carbon grit having an aspect ratio of 1.1 or less and a Heywood diameter of 5 ?m or more present on a fracture surface obtained by tensile fracture of the crosslinked fluoroelastomer at 170° C. is 10/mm2 or less, and the fluoroelastomer (A) includes a vinylidene fluoride (VdF) fluoroelastomer.
    Type: Application
    Filed: February 10, 2023
    Publication date: June 22, 2023
    Applicants: DAIKIN INDUSTRIES, LTD., BRIDGESTONE CORPORATION
    Inventors: Masashi ARAI, Daisuke OHTA, Akinori UEDA, Yasuhiro ODA, Junichi ORIDE
  • PNEUMATIC TIRE
    Publication number: 20230191843
    Abstract: A pneumatic tire according to the present disclosure includes a ply including a plurality of cords arranged in parallel to each other, a cover rubber covering the ply and configuring a tire outer surface, and a reinforcement layer that, at a position of a cut edge of the ply, covers the cut edge of the ply on one side or both sides in a ply thickness direction. The reinforcement layer is configured by a non-woven fabric comprising metal fibers or a rubber sheet material having metal fibers embedded therein.
    Type: Application
    Filed: January 8, 2021
    Publication date: June 22, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Toshiya MIYAZONO
  • Tire
    Patent number: 11679628
    Abstract: A tire includes an annular tire structural member in which a resin-covered cord, configured by covering a reinforcing cord with a resin including a protrusion formed on a side face, is wound in a spiral shape with the resin at one portion of the resin-covered cord integrally bonded to the resin at another mutually adjacent portion of the resin-covered cord.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: June 20, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Kentaro Mizotani, Tomohisa Okawa
  • RUBBER COMPOSITION AND RUBBER PRODUCT
    Publication number: 20230183456
    Abstract: A rubber composition contains a rubber component containing at least one selected from the group consisting of an isoprene rubber, a butadiene rubber, and a styrene-butadiene copolymer rubber, and a compound (1) represented by the following general formula (1). By using the rubber composition, it is possible to produce a rubber product having an excellent balance between a low strain hysteresis loss and a high strain hysteresis loss. [R1 and R2 in the general formula (1) each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 5 to 20 carbon atoms.
    Type: Application
    Filed: April 12, 2021
    Publication date: June 15, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Tomoyuki KOSAI
  • ADHESIVE COMPOSITION FOR ORGANIC FIBER CORDS, ORGANIC FIBER CORD-RUBBER COMPOSITE, AND TIRE
    Publication number: 20230183530
    Abstract: Provided is an adhesive composition for organic fiber cords containing (A) synthetic rubber latex having unsaturated diene, (B) gelatin, and (C) an aqueous compound having a (thermal dissociative blocked) isocyanate group and containing no resorcin or formaldehyde, which has the following effects: (1) causing little damage to the environment by using no resorcin or formaldehyde, (2) in a process of coating an organic fiber cord with the adhesive composition for organic fiber cords and drying and heat curing, it is possible to suppress the adhesion of the adhesive composition for organic fiber cords to a roller or the like, thereby achieving good operability, and (3) achieving good adhesion between an organic fiber cord and a coated rubber composition.
    Type: Application
    Filed: April 23, 2021
    Publication date: June 15, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Masaaki NAKAMURA
  • Tire tread
    Patent number: D990411
    Type: Grant
    Filed: August 30, 2021
    Date of Patent: June 27, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Kohei Sahashi, Shintaro Hayashi
  • Tire sidewall
    Patent number: D991151
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: July 4, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Shiho Kamada
  • Tire sidewall
    Patent number: D991153
    Type: Grant
    Filed: July 6, 2021
    Date of Patent: July 4, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Yoko Itai
  • Tire tread
    Patent number: D993898
    Type: Grant
    Filed: November 25, 2021
    Date of Patent: August 1, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Keigo Saito
  • Tire tread
    Patent number: D994587
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: August 8, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Reo Nakasato
  • Tread portion of an automobile tire
    Patent number: D994590
    Type: Grant
    Filed: September 17, 2021
    Date of Patent: August 8, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Atsuki Iijima