Patents Assigned to The Yokohama Rubber Co., Ltd.
  • Patent number: 11718130
    Abstract: Provided is a pneumatic tire. Center land portions between main grooves extending in a zigzag shape along a circumferential direction on both sides of an equator of a tread portion are defined into repeating units by first shallow grooves that extend along a lateral direction, have both ends communicating with portions other than bent portions of the main grooves, and are disposed at intervals in the circumferential direction. The repeating units are aggregates of four blocks defined by second shallow grooves extending from the main grooves in the lateral direction and converging toward one point on the equator, a third shallow groove extending from one of the first shallow grooves adjacent to the repeating unit to one of the second shallow grooves, and a fourth shallow groove extending from an other of the first shallow grooves adjacent to the repeating units to an other of the second shallow grooves.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: August 8, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Yousuke Sakamoto
  • Patent number: 11718383
    Abstract: A joining structure of a door panel for a lavatory of an aircraft lavatory unit is provided. A plurality of pairs of end surfaces of a structural frame side hinge portion end surface and a door panel side hinge portion end surface facing each other in the vertical direction are alternately provided at intervals in the vertical direction. Bearing members each formed in a cylindrical shape and including a shaft insertion hole are disposed between at least two pairs of end surfaces adjacent to each other in the vertical direction, of the plurality of pairs of end surfaces. Both surfaces of the bearing member are in contact with each of the two pairs of end surfaces.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: August 8, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Kazushi Nakao
  • Patent number: 11712930
    Abstract: With a pneumatic tire not mounted on a rim, in a meridian cross-section a first line is parallel with an innermost bottom side of a bead core in a radial direction and passes through an outermost projection of the bead core in a lateral direction, a second line is orthogonal with the first line at the outermost projection, a third line is orthogonal with the first line and passes through an intersection of a rim cushion rubber, a distance between the second and third lines is 2.0 to 4.0 mm, a shortest distance between an innermost projection of the bead core in the lateral direction and a cord of a carcass layer is 0.6 to 1.4 mm, and a shortest distance between an innermost end of the bottom side of the bead core in the lateral direction and the cord of the carcass layer is 1.2 to 2.2 mm.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: August 1, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Koji Nishio
  • Patent number: 11712929
    Abstract: A surface of each of the portions of a pneumatic tire includes a ridge pattern region provided with a plurality of ridges continuously extending in one direction and provided at intervals, a non-ridge pattern region including a smooth surface and not provided with the ridges, and a two-dimensional code including a dot pattern formed from two types of gray scale elements distinguishably formed using surface irregularities. The two-dimensional code is engraved entirely overlapping the ridge pattern region or engraved overlapping the ridge pattern region and the non-ridge pattern region.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: August 1, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Tatsuro Shinzawa, Kazuya Ishiguro
  • Patent number: 11701924
    Abstract: A pneumatic tire is provided. A tread portion includes shallow grooves formed in a road contact surface of each of shoulder blocks, intermediate blocks, and center blocks, defined by a plurality of longitudinal grooves extending in a tire circumferential direction and a plurality of lateral grooves extending in a tire lateral direction, the shallow groove having a smaller groove depth than the longitudinal groove and the lateral groove. The shallow groove extends along the tire lateral direction, and at least one end thereof communicates with the longitudinal groove or the lateral groove. A contour line of the shallow groove is provided with at least one bend point. A sipe is provided in a flat bottom surface of the shallow groove extending along the shallow groove. Among the shallow grooves, center shallow grooves formed in the center block are each provided with a terminating end portion terminating in the center block.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: July 18, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Kenji Horiuchi
  • Patent number: 11701798
    Abstract: A pneumatic tire is vulcanized using a bladder provided with a coating layer formed of a release agent, and includes a sealant layer disposed on an inner surface of a tread portion in a tire circumferential direction. The amount of silicon of the release agents detected in at least a placement region of the sealant layer by fluorescence X-ray analysis is from 0.1 wt. % to 10.0 wt. %.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: July 18, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Masahiro Naruse, Takashi Hoshiba
  • Patent number: 11701926
    Abstract: In a pneumatic tire, a sipe includes an edge on a leading side and an edge on a trailing side; the edge and the edge each include a chamfered portion shorter than a sipe length of the sipe; a non-chamfered region in which other chamfered portions are not present is provided at portions facing the chamfered portions of the sipe; and for all chamfered portions, including at least the chamfered portions of the sipe, formed on grooves other than main grooves, with a ground contact width being equally divided into three in the tire lateral direction, a total projected area ACE of chamfered portions provided in a center region centrally located in the tire lateral direction and each of total projected areas ASH of chamfered portions provided in shoulder regions located on either side of the center region satisfy a relationship ACE<ASH.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: July 18, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Takanori Uemura, Takayuki Shiraishi, Hiraku Kouda, Tatsuro Shinzawa
  • Patent number: 11702555
    Abstract: A pneumatic tire that rotates about a center axis includes a tread rubber that comprises a contact patch; a groove provided in the tread rubber, the groove having an inner surface that includes a bottom surface and side surfaces that connect the bottom surface to the contact patch; and a coating film disposed covering at least a portion of the inner surface, the coating film reducing exposure of ultraviolet light to the inner surface.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: July 18, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Atsushi Tanno
  • Patent number: 11697308
    Abstract: A run-flat tire includes a belt reinforcing layer outward of a belt layer in a tire radial direction and reinforcing rubber in sidewall portions. Where a center region is a region of a tread portion in which a center land portion corresponding to a land portion included in land portions in a tread portion and located closest to a tire equatorial plane is positioned, the belt reinforcing layer includes a center reinforcing portion in which more pieces of the belt reinforcing layer are layered at a position of the center region than at positions other than the position of the center region, and in the belt reinforcing layer, a width Wc of the center reinforcing portion in a tire lateral direction with respect to a thickness Gr of the side reinforcing rubber at a tire maximum width position is within a range of 0.5 Gr?Wc?2.0 Gr.
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: July 11, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Takanori Uemura
  • Patent number: 11685822
    Abstract: Provided is a rubber composition including: per 100 parts by mass of a diene rubber containing a natural rubber and from 10 to 30 mass % of a butadiene rubber, from 50 to 100 parts by mass of a filler containing not less than 20 mass % of carbon black, oil, sulfur (S), and a vulcanization accelerator (A), a mass ratio of the natural rubber to the butadiene rubber (NR/BR) being 0.3 or greater, a compounded ratio of the sulfur to the vulcanization accelerator (S/A) being 0.8 or less, and a total amount of an oil component in the rubber composition containing the oil being from 15 to 25 parts by mass.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: June 27, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Keisuke Murase
  • Patent number: 11685190
    Abstract: A rubber composition for a tire according to an embodiment of the present technology includes: 100 parts by mass of a diene rubber and from 1 to 30 parts by mass of a thermally expandable microcapsule composite body, and the thermally expandable microcapsule composite body contains one or more thermally expandable microcapsules and an acrylonitrile butadiene copolymer and/or a crosslinked body thereof covering the one or more thermally expandable microcapsules.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: June 27, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Hirokazu Kageyama, Kazushi Kimura, Satoshi Mihara, Yutaro Yamamoto
  • Patent number: 11685195
    Abstract: A tread pattern of a pneumatic tire includes continuous lands provided in half treads on first and second sides, circumferential main grooves, and sipes having a chamfered configuration. The sipes extend inward in a lateral direction from the circumferential main grooves and are closed in the middle of regions of the continuous lands. An edge shape of each of sipes on the first side includes an extending portion extending inward in the lateral direction constantly in an extension direction and a bent portion that is provided to be joined to an end of the first extending portion and that has the edge shape bent from the extension direction of the first extending portion to a direction close to the circumferential direction. Every portion of the first extending portion and the bent portion of the sipes are provided with a main body portion and a sipe chamfered portion.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: June 27, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Ryouichi Tomomatsu
  • Patent number: 11680861
    Abstract: Provided is a tire information acquisition device. A sensor unit substrate on which a sensor for acquiring tire information and a power supply unit for supplying electric power to the sensor are disposed is provided, and a heat-insulating material is disposed at at least a periphery of the power supply unit.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: June 20, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Daisuke Kanenari
  • Patent number: 11667158
    Abstract: In a pneumatic tire, center blocks in a center region of a tread portion form a pair sandwiching an inclined groove that extends inclined with respect to a circumferential direction. Each of the center blocks extends across an equator and includes a notch formed of first and second walls that are connected in a V-shape in a tread road contact surface. The first wall extends within +/?20° with respect to the circumferential direction, and the second wall extends within +/?10° with respect to a lateral direction. Each of shoulder blocks provided in a center region of the tread portion includes a third wall opposed to the notch and at an angle within +/?5° with respect to a straight line connecting an end point of the first wall, located adjacent to the shoulder block and an end point of the second wall, located adjacent to the shoulder block.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: June 6, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Yuhei Suzuki
  • Patent number: D988030
    Type: Grant
    Filed: April 14, 2021
    Date of Patent: June 6, 2023
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Kazushi Nakao
  • Patent number: D988242
    Type: Grant
    Filed: August 17, 2021
    Date of Patent: June 6, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Ryohei Takemori
  • Patent number: D988975
    Type: Grant
    Filed: June 10, 2022
    Date of Patent: June 13, 2023
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Mizuki Kuninaka, Noboru Kuwahara
  • Patent number: D988979
    Type: Grant
    Filed: June 16, 2021
    Date of Patent: June 13, 2023
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Reika Tokunaga, Kotaro Iwabuchi
  • Patent number: D991155
    Type: Grant
    Filed: July 22, 2021
    Date of Patent: July 4, 2023
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Makoto Ishii, Yoshifumi Koishikawa
  • Patent number: D994583
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: August 8, 2023
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Mizuki Kuninaka, Noboru Kuwahara