Patents Assigned to Bridgestone Corporation
  • PNEUMATIC TIRE
    Publication number: 20230271460
    Abstract: A pneumatic tire according to the present disclosure includes a pair of bead cores, a carcass ply including a main body positioned between the bead cores and a turn-up portion connected to the main body and formed by turning up around each bead core from inside to outside in a tire width direction, a cover rubber covering the main body of the carcass ply and an outer side of the turn-up portion in the tire width direction and configuring a tire outer surface, and a reinforcement layer located inward from the tire outer surface of the cover rubber and covering an outer side, in the tire width direction, of at least a portion of the turn-up portion of the carcass ply. The reinforcement layer is configured by a non-woven fabric including metal fibers or a rubber sheet material having metal fibers embedded therein.
    Type: Application
    Filed: January 8, 2021
    Publication date: August 31, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Toshiya MIYAZONO
  • TIRE
    Publication number: 20230271452
    Abstract: A pneumatic tire provided with a tread having a plurality of main grooves extending in a tire circumferential direction and a plurality of land portions demarcated by the main grooves, in which the tread includes: a first rubber layer located on an inner side in a tire width direction and a second rubber layer which is in contact with the first rubber layer and located on an outer side in the tire width direction of the first rubber layer, and in which, in a cross-sectional view in the width direction, a boundary between the first rubber layer and the second rubber layer is inclined relative to a tire radial direction, and one end portion of the boundary terminates at a groove wall on the inner side in the tire width direction of the main groove.
    Type: Application
    Filed: October 8, 2021
    Publication date: August 31, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Nobuyuki ISHIHARA
  • FILM, LAMINATED BODY, METHOD OF PRODUCING FILM, TIRE, AND METHOD OF PRODUCING TIRE
    Publication number: 20230272249
    Abstract: Provided is a thin film with good durability that is easy to handle during storage and use. The film contains, as a rubber component, at least a copolymer having a conjugated diene unit, a non-conjugated olefin unit, and an aromatic vinyl unit, and having a proportion of a butylene unit of 0 mol %, where a filler content is 15 parts by mass or less with respect to 100 parts by mass of the rubber component, no cross-linking agent is contained, and the thickness is 300 ?m or less.
    Type: Application
    Filed: July 20, 2021
    Publication date: August 31, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Takuya OZAKI, Shinichiro SUGI, Masahiro HOJO
  • Tire
    Patent number: 11738605
    Abstract: The bead portion of a pneumatic tire has a bead structure including a bead core having a bead cord covered with a resin material, and a bead filler continuous to the bead core and formed of the resin material and tapered outside in the tire radial direction. The bead structure has a weld line of the resin material. The weld line is formed inside in the tire radial direction more than ? of the total height along the tire radial direction of the bead structure.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: August 29, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Takumi Yamada, Hiroyuki Fudemoto
  • TIRE PRODUCTION DEVICE AND TIRE PRODUCTION METHOD
    Publication number: 20230264446
    Abstract: A tire production device includes a supply unit to supply a ribbon strip molded into a ribbon shape; and a tire molding unit to stick the ribbon strip onto an outer periphery of a drum having an inner peripheral shape of a tire, while rotating the drum, in which the supply unit has a sticking position at which the ribbon strip is stuck onto the outer periphery of the drum. The tire molding unit includes: the drum with a horizontal rotation axis; a turning table that turns the drum around a vertical axis while maintaining a horizontal rotation axis of the drum; and a parallel movement mechanism provided on the turning table to move the drum in parallel along a horizontal surface set to the turning table, and in which the rotation axis extends in a tangential direction centered on the axis line about which the turning table turns.
    Type: Application
    Filed: July 9, 2021
    Publication date: August 24, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Satoshi IYANAGI, Toshiki NAKAMURA
  • 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
  • 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 sidewall
    Patent number: D997086
    Type: Grant
    Filed: May 13, 2021
    Date of Patent: August 29, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Takamitsu Nakamura
  • 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
  • Tire tread
    Patent number: D997850
    Type: Grant
    Filed: November 25, 2021
    Date of Patent: September 5, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Kohei Sahashi, Shintaro Hayashi