Patents Assigned to Bridgestone Corporation
  • Publication number: 20220194130
    Abstract: A tire includes: a skeleton portion including a rim member, a plurality of body springs latched on the rim member, and a plurality of interlink springs interlaced with the body springs; and a tread member disposed at least on the outer periphery of the skeleton portion.
    Type: Application
    Filed: May 14, 2020
    Publication date: June 23, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Yoshihide KOUNO
  • Publication number: 20220196038
    Abstract: A fluid pressure actuator is provided with an actuator main portion whose shape is changed by the expansion or contraction of a cylindrical tube expanded and contracted by the pressure of fluid, and a detection unit for detecting the length L of the actuator main portion along the longitudinal direction of the tube.
    Type: Application
    Filed: April 14, 2020
    Publication date: June 23, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Ryo SAKURAI, Hideyuki SAKURAI
  • Publication number: 20220185023
    Abstract: A tire including: at least three circumferential grooves; a first shoulder portion defined by a circumferential groove and a ground contact end on one side in a width direction; a second shoulder portion defined by a circumferential groove and a ground contact end on the other side in the width direction; a first land portion located between the circumferential groove defining the first shoulder portion and a circumferential groove adjacent to the circumferential groove defining the first shoulder portion; a second land portion located between the circumferential groove defining the second shoulder portion and the circumferential groove adjacent to the circumferential groove defining the second shoulder portion; recesses extending to the first shoulder portion and the first land portion across the circumferential groove defining the first shoulder portion; and recesses extending to the second shoulder portion and the second land portion across the circumferential groove defining the second shoulder portion.
    Type: Application
    Filed: December 11, 2019
    Publication date: June 16, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Mayuko KARASAWA
  • Publication number: 20220184663
    Abstract: Systems and methods for managing the waste associated with the extraction of rubber from guayule shrubs are provided. Also provided is a portable local sub-station for reducing the transportation costs associated with the processing of guayule shrubs for the extraction of rubber. Use of the disclosed systems, methods and/or local sub-station can reduce transportation costs, reduce processing costs and reduce the downstream processing complexity associated with the extraction of rubber from guayule shrubs.
    Type: Application
    Filed: March 7, 2022
    Publication date: June 16, 2022
    Applicant: Bridgestone Corporation
    Inventors: Yingyi Huang, Hiroshi Mouri, Robert W. Handlos, Jenny L. Sheaffer
  • Publication number: 20220185931
    Abstract: Disclosed herein are a modified high cis polydiene polymer, processes for preparing the modified high cis polydiene polymer, and tire rubber compositions containing the modified high cis polydiene polymer. The processes make use of a functionalizing compound of formula I or formula II and a coupling agent to prepare the modified high cis polydiene polymer from a quantity of conjugated diene monomer polymerized using a lanthanide-based catalyst system. The modified high cis polydiene polymer includes at least one polymer chain having a residue from the functionalizing compound and a residue from the coupling agent and can be utilized in tire rubber compositions in combination with other ingredients such as fillers.
    Type: Application
    Filed: March 10, 2020
    Publication date: June 16, 2022
    Applicant: Bridgestone Corporation
    Inventors: Zengquan Qin, Yuan-Yong Yan
  • Publication number: 20220185921
    Abstract: The present disclosure provides a polyisoprene wherein: a vinyl bond content of the polyisoprene is 30 mol % or higher; and a ratio of the weight-average absolute molecular weight (Mw?) determined by GPC-MALS with respect to the weight-average molecular weight (Mw) in terms of polystyrene determined by GPC, i.e., Mw?/Mw, is 0850 or less. A rubber composition containing the polyisoprene is excellent in the fuel-saving performance and grip performance on a wet road surface, as compared with a rubber composition containing the conventional polyisoprene.
    Type: Application
    Filed: January 28, 2020
    Publication date: June 16, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Shigenaga TAKANO, Aya HOTTA, Satoru TAMAKI
  • Patent number: 11358428
    Abstract: The active damper upper mount includes an inner member (11, 111) to which an upper end portion of a rod (22, 122) of an active damper (21, 121) is fixed, an intermediate member (12, 112) that surrounds the inner member in a circumferential direction around a rod axis (O1, O2), an outer member (13, 113) that surrounds the intermediate member in the circumferential direction and is attached to a vehicle body side, a first elastic body (14, 114) that is disposed between the inner member and the intermediate member and supports the inner member and the intermediate member so as to be elastically displaceable relative to each other, and a second elastic body (15, 115) that is disposed between the intermediate member and the outer member and supports the intermediate member and the outer member so as to be elastically displaceable relative to each other.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: June 14, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Kazutaka Otsu, Syogo Tsuji
  • Publication number: 20220176749
    Abstract: In regions, divided by the tire equator, on both sides of the tread surface of a tire, the tire includes a grip area along the entire circumference of the tread, the grip area including a plurality of recessed lines, with a shape recessed toward an inner side of the tire from the outline of the tread surface, that extend from the tread edge side in a direction inclined relative to the tire equator and are arrayed in parallel, and a plurality of sipes that extend toward the tire equator in a direction inclined relative to the tire equator, starting in the grip area and terminating before the tire equator. The negative ratio in the grip area is higher than the negative ratio closer to the tire equator than the grip area.
    Type: Application
    Filed: December 10, 2019
    Publication date: June 9, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Kohei SAHASHI
  • Publication number: 20220176793
    Abstract: A partition member (17) of an anti-vibration device (1, 2, 3, 4) includes a membrane (31) and an orifice passage (21), the orifice passage includes a main liquid chamber-side passage (21a) and an auxiliary liquid chamber-side passage (21b), the main liquid chamber-side passage and the auxiliary liquid chamber-side passage extend in a circumferential direction and are disposed at mutually different radial positions, a flow direction in the main liquid chamber-side passage and a flow direction in the auxiliary liquid chamber-side passage are opposite to each other when liquid flows through the orifice passage, a channel cross-sectional shape in at least one passage of the main liquid chamber-side passage and the auxiliary liquid chamber-side passage is a laterally long flat shape that is short in an axial direction along a central axis (0) of a first attachment member and long in a radial direction, and a ratio of a radial size to an axial size in the one passage is larger than the ratio in the other passage of
    Type: Application
    Filed: January 31, 2020
    Publication date: June 9, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Hiroshi KOJIMA
  • Patent number: 11352470
    Abstract: The present invention achieves higher performance (improvement in, for example, heat resistance, durability, and mechanical characteristics) of polyamide resin by a method which is not dependent on a combination with fibers. According to an embodiment of a polyamide resin member of the present invention, the polyamide resin member contains nano-oriented crystals of polyamide 66, and has a high heatproof temperature (Th?278° C.) and a high melting point (Tm?282° C.).
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: June 7, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Masamichi Hikosaka, Kiyoka Okada, Kenichiro Iwasaki, Kei Yasui, Katsuomi Tanahashi, Katsumi Nabeshima, Mai Ishikawa
  • Patent number: 11352744
    Abstract: Rubber article-reinforcing steel cord in which corrosion resistance is improved without an increase in weight. In a rubber article-reinforcing steel cord (1), plural sheath strands (3) each formed by twisting together plural steel filaments are twisted together around at least one core strand (2) formed by twisting together plural steel filaments. Core strand (2) and sheath strands (3) are each formed by twisting together one or two core filaments (2c) and (3c) and plural sheath filaments (2s) and (3s), respectively, and a relationship represented by the following Formula (1) is satisfied when a wire diameter of core filament(s) (2c) of core strand (2), a wire diameter of sheath filaments (2s), a wire diameter of core filaments (3c) of sheath strands (3), and a wire diameter of sheath filaments (3s) are defined as dcc, dcs, dsc and dss, respectively: dcc>dcs?dsc>dss (1).
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: June 7, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Naohiko Obana
  • Publication number: 20220169074
    Abstract: A vehicle wheel having a rim part to which a tire is mounted and a vehicle body attachment part which is attached to a vehicle body, in which the rim part has, on an inner circumferential surface thereof, a plurality of fins each having a heat dissipation surface, and in which the fins are arranged periodically along a circumferential direction.
    Type: Application
    Filed: June 17, 2020
    Publication date: June 2, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Yuki KAWAKAMI
  • Publication number: 20220169082
    Abstract: In a tire, first and second ridge parts extending in a tire radial direction each have a central portion in the tire radial direction located on an inner side in the tire radial direction with respect to a central portion of the first ridge part in the tire radial direction are provided on an outer surface of a side wall part. A decorative area provided in an outer surface of the side wall part includes a dense area in which the first ridge part and the second ridge part face each other in the tire circumferential direction, and a sparse area in which either the first ridge parts or the second ridge parts face each other in the tire circumferential direction without interposing the other therebetween.
    Type: Application
    Filed: May 20, 2020
    Publication date: June 2, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Shiho KAMADA
  • Patent number: 11338619
    Abstract: Provided is pneumatic tire in which a land portion includes a width direction sipe extending in a tread width direction, the width direction sipe includes, in a cross section along a depth direction, a linear portion extending from an opening of the width direction sipe toward a bottom of the width direction sipe, and a bent portion connected to the linear portion, bending and extending from a connecting portion with the linear portion to the bottom of the width direction sipe, and the linear portion of the width direction sipe has a length in the depth direction increasing as the linear portion extends from a center portion of the width direction sipe in the tread width direction toward an end portion in the tread width direction.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: May 24, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Yoshiki Nakata
  • Patent number: 11339272
    Abstract: An additive for rubber that enables a rubber composition to have excellent low heat generating property and processability, a rubber composition containing the additive for rubber, and a tire using the same are provided.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: May 24, 2022
    Assignees: BRIDGESTONE CORPORATION, OTSUKA CHEMICAL CO., LTD.
    Inventors: Satoshi Hamatani, Shinya Shinozaki, Mifuyu Ueno, Masaki Abe
  • Patent number: 11338623
    Abstract: A ply of a carcass of a pneumatic radial tire includes a turn-up ply and a down ply. The turn-up ply includes: a main body portion disposed between a pair of bead cores; turn-up portions around the bead cores from an inside toward an outside in a tire width direction. The down ply extends up to an inside in a radial direction of the bead cores so as to cover the turn-up ply including the turn-up portions from an outside. A curvature is formed at either one of a down ply predetermined portion of the down ply, which covers a turn-up end portion of the turn-up portion of the down ply from an outside in the tire width direction, and a turn-up ply portion that covers the turn-up end portion of the turn-up portion in the main body portion of the turn-up ply from inside in the tire width direction.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 24, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Takahiro Tobe
  • Publication number: 20220153175
    Abstract: A passenger-seat-cushion-member manufacturing method including a step of shaping the porous structural body by using a 3D printer; and a step of coupling the filling body side coupling part including the shaped porous structural body to the seat body side coupling part, to fill the seat body with the filling body.
    Type: Application
    Filed: February 17, 2020
    Publication date: May 19, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Taichi ITABASHI, Nobuyuki AZAKAMI, Yukiko YAMAGUCHI
  • Patent number: 11331964
    Abstract: A tire damage detection system (10) is provided with an image data acquisition unit (120) which acquires image data including a rim wheel and a tire side part of a tire assembled to the rim wheel, a rim information acquisition unit (130) which acquires rim information including a radial size of the rim wheel associated with the tire, an damage detection unit (140) which detects an damage portion of the tire side part on the basis of the image data and detects a size of the damage portion with reference to a diameter of the rim wheel based on the rim information, and an output unit (150) which outputs information on the damage portion detected by the damage detection unit (140).
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: May 17, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Teppei Mori
  • Patent number: D952542
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: May 24, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Mayuko Karasawa
  • Patent number: D952543
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: May 24, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Mayuko Karasawa