Patents Assigned to The Yokohama Rubber Co., Ltd.
  • Patent number: 11850890
    Abstract: Provided is a pneumatic tire. Side blocks are provided at extension positions of shoulder blocks on an inner side in a tire lateral direction, and each of the side block is formed into an L-shape in which a radial portion extending in a tire radial direction and a circumferential portion extending in a tire circumferential direction are coupled in a hook portion. Of the side blocks, first blocks having the circumferential portions oriented to the shoulder block side and second blocks having the radial portions oriented to the shoulder block side form pairs by facing each other so that the circumferential portions of the first blocks and the second blocks overlap with each other. The side block pairs formed of the first blocks and the second blocks are arrayed in the tire circumferential direction.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: December 26, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Takahisa Murata
  • Patent number: 11845866
    Abstract: The present technology provide a rubber composition including: 100 parts by mass of a diene rubber, from 30 to 100 parts by mass of carbon black and/or a white filler, from 1 to 20 parts by mass of silicone-based microparticles that have an average particle size from 5 to 500 ?m and that are three-dimensionally crosslinked, from 0.1 to 10 parts by mass of a nonionic surfactant, and from 1 to 20 parts by mass of thermally expanding microcapsules.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: December 19, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hirokazu Kageyama, Kazushi Kimura, Satoshi Mihara, Yutaro Yamamoto
  • Patent number: 11833860
    Abstract: Provided is a pneumatic tire. At least one land portion is defined and formed by a plurality of circumferential main grooves provided in a tread surface. A main sipe including a body portion and a chamfered portion is formed in at least one side of the body portion. A branch sipe branching from the chamfered portion is provided. The depth of the body portion is equal to or greater than the depth of the branch sipe.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: December 5, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hiraku Koda, Ryohei Takemori, Yuki Sasaya
  • Patent number: 11833865
    Abstract: In a state in which the pneumatic tire is mounted on a regular rim and inflated to 5% of a specified internal pressure, a tread width is TW, a total tire width is SW in a tire meridian cross-sectional view, a relationship of 0.80?TW/SW?0.95 is satisfied, a ground contact width at a load of 100% of a maximum load capacity is CW100, a ground contact width at a load of 70% of the maximum load capacity is CW70, and a relationship of 1.04?CW100/CW70?1.15 is satisfied.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: December 5, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Hiroshi Fujii
  • Patent number: 11827061
    Abstract: A stud pin includes a tip including an end surface configured to come into contact with a road surface, a body portion configured to support the tip, and a lower flange. The flange profile shape of the lower flange is an anisotropic shape. The flange profile shape includes four or more first flange protrusion portions that project in the longitudinal direction and two second flange protrusion portions that project in the lateral direction. A tip profile shape of the tip is a shape including tip linear portions extending in a linear manner. At least one of the tip linear portions extends along a portion of the flange profile shape between two adjacent protrusion portions of the first flange protrusion portion and the second flange protrusion portion along the outer circumference of the flange profile shape.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: November 28, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Masakazu Mori
  • Patent number: 11826928
    Abstract: Provided are a quality inspection method and a quality inspection system for unvulcanized rubber material. A final dielectric constant measurement device detects the dielectric constant of a final rubber material in which a compounding agent of predetermined type is mixed with unvulcanized rubber, and a calculator calculates a compounding ratio of the compounding agent to the final rubber material based on the detected dielectric constant, determines whether or not the calculated compounding ratio is in a preset compounding reference range, displays a determination result on a monitor, and adjusts a ratio of the compounding agent fed into an extruder to the unvulcanized rubber such that the calculated compounding ratio is within the compounding reference range.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: November 28, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Satoshi Onodera
  • Patent number: 11820173
    Abstract: Provided is a pneumatic tire including a pair of bead portions; at least one carcass layer extending between the pair of bead portions; a belt layer disposed outward of the carcass layer in a tire radial direction; a tread rubber disposed outward of the belt layer in the tire radial direction; a pair of sidewall rubbers disposed outward of the carcass layer in a tire lateral direction; and an electrically conductive portion extending between the pair of bead portions and having at least one separation portion, the electrically conductive portion having a linear structure, the linear structure including an electrically conductive linear member formed in a linear shape by molding an electrically conductive material with an electrical resistivity of less than 1×10{circumflex over (?)}8 ?/cm.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: November 21, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hiroshi Hata, Hidekazu Ishii
  • Patent number: 11820172
    Abstract: A pneumatic tire comprises a tread rubber with a groove depth at a shoulder portion that comes into contact with a road surface of 10 mm or greater. A rubber composition of the tread rubber contains: 60 to 70 parts by mass of carbon black having a nitrogen adsorption specific surface area of 70 to 130 m2/g, 0.5 parts or greater by mass of sulfur, and a vulcanization accelerator per 100 parts by mass of diene rubber including 50 to 70 mass % of styrene-butadiene rubber, 20 to 30 mass % of butadiene rubber, and 10 to 30 mass % of natural rubber. The diene rubber has an average glass transition temperature of ?65° C. or lower. A ratio of a compounded amount of the vulcanization accelerator to a compounded amount of the sulfur is 1.0 to 1.3. The tread rubber has a rubber hardness of 65 to 70 at 20° C.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: November 21, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Hiroki Sugiura
  • Patent number: 11813894
    Abstract: A tire includes a narrow shallow grooved region on a land portion defined by a circumferential main groove. The narrow shallow grooved region includes a plurality of narrow shallow grooves that are not open to the circumferential main groove. A ratio of a total area of the narrow shallow grooved region to a ground contact area of the land portion is not less than 0.05 and not greater than 0.60.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: November 14, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Ryota Gunji
  • Patent number: 11813920
    Abstract: Provided is a piping system for an air conditioner installed in a vehicle that can achieve appropriate weight reduction while ensuring appropriate pressure resistance as the piping system as a whole. A circulation path that connects component devices of an air conditioner (8) in an annular shape to circulate a refrigerant (C) is formed by each pipe body extending between the component devices. At least one of the pipe bodies includes: a resin hose (2) embedded with a non-metal reinforcing material (3f) or a resin pipe (5) embedded with a non-metal reinforcing material (6f), and the resin pipe bodies (2), (5) are employed in 50% or more of a total length of each of the pipe bodies constituting the circulation path.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: November 14, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Gang Hou, Hiroaki Shibano, Jiro Watanabe, Susumu Hatanaka, Naoshi Yamaguchi, Mie Okura, Ikuma Yusa, Shusaku Tomoi, Tomohide Saita, Hiroyuki Wakamatsu, Ryuhei Suzuki, Yuki Mizutani, Nobuaki Kuribayashi, Hiroshi Shintani, Kazuto Yamakawa
  • Patent number: 11813897
    Abstract: A tire has a tire center in the tire width direction. An intersection point of a carcass outer surface with a parallel line extending parallel with a rotation axis and passing through a tire maximum width position is denoted as P1. An intersection point of the parallel line LP with a side surface is denoted as P2. An intersection point of the parallel line with a protrusion portion outer surface of a protrusion portion is denoted as P3. A distance between the tire center and the intersection point P1 is denoted as W1. A distance between the tire center and the intersection point P3 is denoted as W3. A distance between the intersection point P1 and the intersection point P2 is denoted as G1. A distance between the intersection point P2 and the intersection point P3 is denoted as G2. 0.80?W1/W3?0.95 and 0.1?G1/G2?1.
    Type: Grant
    Filed: April 12, 2022
    Date of Patent: November 14, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Masatoshi Kuriyama
  • Patent number: 11801716
    Abstract: Each sipe wall surface of a sipe in a tread portion of a pneumatic tire includes, along a sipe depth direction, multiple ridge portions and at least one valley portion bending like waves. Where viewed along the sipe depth direction, a recess depth of the valley portion with respect to the ridge portion on one wall surface varies depending on a position in the extension direction, the valley portion extends from a position at which the recess depth is maximized toward a position at which the recess depth is minimized, and the recess depth decreases as the valley portion extends from the side of the maximum-depth valley portion toward the maximum ridge portion. The sipe is provided in at least one of a first half-tread region on a first side or a second half-tread region on a second side in a tire width direction.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: October 31, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Yuta Uchida
  • Patent number: 11794524
    Abstract: A pneumatic tire comprises a carcass layer, a belt layer disposed on the outer side in the tire radial direction of the carcass layer, and tread rubber disposed on the outer side in the tire radial direction of the belt layer. The belt layer is formed by laminating a pair of cross belts having belt angles with an absolute value from 10° to 45° both inclusive and mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of ±5° relative to the tire circumferential direction. The distance (Gcc) from the tread profile to the tire inner circumferential surface along the tire equatorial plane and the distance (Gsh) from the tread edge to the tire inner circumferential surface have a relationship satisfying 1.10?Gsh/Gcc. The groove depth (Dsh) and under-groove gauge (UDsh) of the outermost circumferential main groove have a relationship satisfying 0.20?UDsh/Dsh.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: October 24, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Yukihito Yamaguchi
  • Patent number: 11794529
    Abstract: A run-flat tire includes side reinforcing rubber between a carcass layer and an innerliner layer in sidewall portions, first bead filler rubber arranged inside folded back portions of the carcass layer, and second bead filler rubber arranged outward of the folded back portions of the carcass layer in a lateral direction and along the carcass layer. In a meridian cross-section, a radial-direction height of the first bead filler rubber is 15% or greater and 40% or less of a cross-sectional height, a radial-direction height of the second bead filler rubber is 35% or greater and 55% or less of the cross-sectional height, a linear distance from a radial-direction outer end to a radial-direction inner end of the second bead filler rubber is 20% or greater and 45% or less of the cross-sectional height, and the second bead filler rubber has a larger cross-sectional area than the first bead filler rubber.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: October 24, 2023
    Assignee: he Yokohama Rubber Co., LTD.
    Inventor: Norifumi Kameda
  • Patent number: 11794431
    Abstract: A method for manufacturing a tire includes forming a belt layer by bonding strip materials adjacent in the circumferential direction on the molding surface located on the outer circumferential side of the rigid core. Along the profile in the width direction of an outer circumferential surface of the rigid core, the rigid core is moved so that the molding surface is brought close to the strip material to be bonded, and the strip material is bonded to the molding surface extending in the longitudinal direction while rotating the rigid core in a direction in which the circumferential angle of the rigid core with respect to the longitudinal direction of the strip material changes, so that variation in the bonding margin, due to the position of the rigid core in the width direction, between strip materials that have been adjacently bonded to the molding surface in the circumferential direction is reduced.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: October 24, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Yuta Takanashi, Misaki Oka
  • Patent number: 11787238
    Abstract: A pneumatic tire includes a plurality of protrusion portions extending along a tire side surface of a tire side portion longitudinally intersecting a tire circumferential direction or a tire radial direction and being provided at intervals in the tire circumferential direction, and each of the protrusion portions includes an external contour that includes a plurality of main external contour portions having different curvatures, and a connection portion connecting between the main external contour portions, the external contour projecting from the tire side surface in a cross-sectional shape in a longitudinal direction.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: October 17, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Yuji Kodama
  • Patent number: 11787923
    Abstract: A rubber composition of the present technology contains: diene rubber (A) containing a predetermined amount of specific conjugated diene rubber represented by a predetermined formula; silica having a CTAB adsorption specific surface area in a predetermined range; and a silane coupling agent represented by a predetermined formula.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: October 17, 2023
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hiroki Sugimoto, Shuichi Nakano, Makoto Ashiura
  • Patent number: D1004529
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: November 14, 2023
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Hiraku Kouda, Noboru Kuwahara
  • Patent number: D1005220
    Type: Grant
    Filed: April 30, 2021
    Date of Patent: November 21, 2023
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Takashi Kidesaki, Yoshifumi Koishikawa, Makoto Ishii
  • Patent number: D1005224
    Type: Grant
    Filed: April 30, 2021
    Date of Patent: November 21, 2023
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Makoto Ishii, Yoshifumi Koishikawa