Patents by Inventor Hideki Hamanaka

Hideki Hamanaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220266630
    Abstract: A pneumatic tire comprises a carcass layer, a belt layer radially outward of the carcass layer, and a tread rubber radially outward of the belt layer. The belt layer includes an angle belt having a belt angle ?45° and ?70° in absolute values, a pair of cross belts having belt angles of ?10° and ?45° in absolute values and having belt angles of mutually opposite signs, and a reinforcing layer having a belt angle within ±5° relative to a circumferential direction. A width Ws of the reinforcing layer and a cross-sectional width Wca of the carcass layer satisfy 0.60?Ws/Wca?0.70. The cross belts are radially outward of the large angle belt. The reinforcing layer is radially outward of the pair of cross belts. A width Wb2 of a wider cross belt of the pair and Wca satisfy 0.79?Wb2/Wca?0.89.
    Type: Application
    Filed: March 28, 2022
    Publication date: August 25, 2022
    Inventor: Hideki Hamanaka
  • Publication number: 20220266631
    Abstract: A pneumatic tire comprises a carcass layer, a belt layer radially outward of the carcass layer, and a tread rubber radially outward of the belt layer. The belt layer includes an angle belt having a belt angle ?45° and ?70° in absolute values, a pair of cross belts having belt angles of ?10° and ?45° in absolute values and having belt angles of mutually opposite signs, and a reinforcing layer having a belt angle within ±5° relative to a circumferential direction. A width Ws of the reinforcing layer and a cross-sectional width Wca of the carcass layer satisfy 0.60?Ws/Wca?0.70. The cross belts are radially outward of the large angle belt. The reinforcing layer is radially inward of the pair of cross belts. A width Wb2 of a wider cross belt of the pair and Wca satisfy 0.79?Wb2/Wca?0.89.
    Type: Application
    Filed: March 29, 2022
    Publication date: August 25, 2022
    Inventor: Hideki Hamanaka
  • Patent number: 11305583
    Abstract: A pneumatic tire comprises a carcass layer, a belt layer disposed on an outer side of the carcass layer in a tire radial direction, and a tread rubber disposed on the outer side of the belt layer in the tire radial direction. The belt layer formed by laminating an angle belt having a belt angle ?45° and ?70° in absolute values, a pair of cross belts, having belt angles of ?10° and ?45° in absolute values and having belt angles of mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of ±5° with respect to a tire circumferential direction. A tread width TW and a cross-sectional width Wca of the carcass layer have a relationship such that 0.82?TW/Wca?0.92. A width Ws of the circumferential reinforcing layer and a cross-sectional width Wca of the carcass layer such that 0.60?Ws/Wca?0.70.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: April 19, 2022
    Inventor: Hideki Hamanaka
  • Patent number: 11214098
    Abstract: A pneumatic tire includes at least four circumferential main grooves extending in a tire circumferential direction and at least five land portions defined by the at least four circumferential main grooves. A center land portion includes a plurality of center lug grooves extending through the center land portion in a tire lateral direction and disposed at predetermined intervals in the tire circumferential direction, and a plurality of center blocks that are defined by the plurality of center lug grooves. The center blocks each include a narrow shallow groove that extends through the center block in the tire lateral direction and that remains open when the tire comes into contact with the ground.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: January 4, 2022
    Inventor: Hideki Hamanaka
  • Publication number: 20210362551
    Abstract: A pneumatic tire includes two circumferential main grooves disposed in an inner half of a tread developed width in a tire lateral direction; shoulder lug grooves that divide shoulder land portions into shoulder block portions and that each include a see-through portion in the tire lateral direction; center lug grooves dividing a center land portion into a plurality of center block portions; and center sipes having both ends terminated in the center block portions. The center sipe includes at least two sipe portions having different angles via at least one bent portion. An angle ?1 of at least one sipe portion with respect to a tire equator line satisfies 0°??1?15°, and an angle ?2 of at least the other sipe portion with respect to the tire equator line satisfies 35°??2?60°.
    Type: Application
    Filed: November 30, 2018
    Publication date: November 25, 2021
    Inventor: Hideki Hamanaka
  • Patent number: 11034190
    Abstract: A pneumatic tire includes: a rib defined by a circumferential main groove; circumferential sipes formed in the rib at intervals in the circumferential direction; rib edge sipes formed in the rib aligning in the circumferential direction, each of the rib edge sipes terminating in the rib opening to the circumferential main groove; and first and second narrow grooves extending in the circumferential direction, each of the first and second narrow grooves having a groove depth shallower than depths of the circumferential sipes and the rib edge sipes, the first narrow grooves having ends connected to one of the circumferential sipes adjacent to each other in the circumferential direction and the second narrow grooves each including an inner connecting portion connected to one of the first narrow shallow grooves and including an outer connecting portion connected to one of the rib edge sipes.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: June 15, 2021
    Inventor: Hideki Hamanaka
  • Publication number: 20200376895
    Abstract: A pneumatic tire includes: a rib defined by a circumferential main groove; circumferential sipes formed in the rib at intervals in the circumferential direction; rib edge sipes formed in the rib aligning in the circumferential direction, each of the rib edge sipes terminating in the rib opening to the circumferential main groove; and first and second narrow grooves extending in the circumferential direction, each of the first and second narrow grooves having a groove depth shallower than depths of the circumferential sipes and the rib edge sipes, the first narrow grooves having ends connected to one of the circumferential sipes adjacent to each other in the circumferential direction and the second narrow grooves each including an inner connecting portion connected to one of the first narrow shallow grooves and including an outer connecting portion connected to one of the rib edge sipes.
    Type: Application
    Filed: April 10, 2018
    Publication date: December 3, 2020
    Inventor: Hideki Hamanaka
  • Patent number: 10737533
    Abstract: A pneumatic tire includes a plurality of center lug grooves disposed at intervals in a tire circumferential direction that extend crossing a tire equator line and include a first groove turning portion and a second groove turning portion; a plurality of shoulder lug grooves disposed in the intervals between the plurality of center lug grooves in the tire circumferential direction extending outward in the tire width direction, an inner end in the tire width direction being disposed outward of an end of the center lug groove in the tire width direction; a pair of circumferential main grooves to which the ends of the center lug grooves and the inner ends of the plurality of shoulder lug grooves in the tire width direction alternately connect; and a circumferential secondary groove disposed around the entire circumference of the pneumatic tire with a wave-like shape.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: August 11, 2020
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Yukihito Yamaguchi, Shoei Kakuta, Hideki Hamanaka, Risa Tauchi, Toshiyuki Sato
  • Patent number: 10406863
    Abstract: The pneumatic tire includes a carcass layer, a belt layer disposed outward of the carcass layer in the tire radial direction, and a tread rubber disposed outward of the belt layer in the tire radial direction. Moreover, the belt layer is formed by laminating a pair of cross belts having a belt angle with an absolute value from 10° to 45° both inclusive and mutually opposite signs, and the circumferential reinforcing layer having a belt angle within a range of ±5° relative to the tire circumferential direction. Moreover, 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.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: September 10, 2019
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Hideki Hamanaka
  • Patent number: 10322609
    Abstract: A tread pattern is provided with: shoulder lug grooves open at ground contact ends; center lug grooves each having opposite ends; circumferential primary grooves each formed in a wavy shape by connecting ends of the center lug grooves and the inner ends of the shoulder lug grooves in the width direction of the tire; and center blocks defined by the center lug grooves and the pair of circumferential primary grooves. The width of the circumferential primary grooves is smaller than the width of the shoulder lug grooves. The center lug grooves are tilted relative to both the circumferential direction and the width direction of the tire and each have a third groove turning portion and a fourth groove turning portion which protrude in the different directions in the circumferential direction of the tire.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: June 18, 2019
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Shoei Kakuta, Hideki Hamanaka, Yukihito Yamaguchi, Risa Tauchi, Toshiyuki Sato
  • Patent number: 10308079
    Abstract: A tread pattern of a pneumatic tire comprises shoulder lug grooves that open to ground contact edges; center lug grooves; a pair of circumferential primary grooves with a narrower groove width than the shoulder lug grooves, wherein a portion that bends outward in the tire width direction connects to the shoulder lug grooves and a portion that bends inward in the tire width direction connects to the center lug grooves; and center blocks defined by the center lug grooves and the circumferential primary grooves. The circumferential primary grooves are on opposite sides in the tire width direction in regions spaced from a center line by a distance of from 30% to 60% of half of a tread width T. The ratio of the groove width P3 of the center lug grooves to the maximum length LB in the tire circumferential direction of the center blocks is from 0.03 to 0.07.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: June 4, 2019
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Yukihito Yamaguchi, Shoei Kakuta, Hideki Hamanaka, Risa Tauchi, Toshiyuki Sato
  • Patent number: 10300746
    Abstract: A pneumatic tire includes center lug grooves disposed at intervals in a tire circumferential direction that extend crossing a tire equator line and include a first groove turning portion and a second groove turning portion; shoulder lug grooves disposed in the intervals between the center lug grooves in the tire circumferential direction extending outward in the tire width direction, an inner end in the tire width direction being disposed outward of an end of the center lug groove in the tire width direction; a pair of circumferential main grooves to which the ends of the center lug grooves and the inner ends of the shoulder lug grooves in the tire width direction alternately connect; and a circumferential secondary groove disposed around the entire circumference of the pneumatic tire that intersects the center lug grooves between the first groove turning portion and the second groove turning portion.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: May 28, 2019
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Toshiyuki Sato, Shoei Kakuta, Hideki Hamanaka, Yukihito Yamaguchi, Risa Tauchi
  • Patent number: D851579
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: June 18, 2019
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Hideki Hamanaka, Koichi Kotoku
  • Patent number: D852123
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: June 25, 2019
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Hideki Hamanaka
  • Patent number: D860924
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: September 24, 2019
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Hideki Hamanaka, Kotaro Iwabuchi
  • Patent number: D862377
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: October 8, 2019
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Hideki Hamanaka, Kotaro Iwabuchi
  • Patent number: D865656
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: November 5, 2019
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Hideki Hamanaka
  • Patent number: D868683
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: December 3, 2019
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Hideki Hamanaka, Kotaro Iwabuchi
  • Patent number: D887960
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: June 23, 2020
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Hideki Hamanaka, Kotaro Iwabuchi
  • Patent number: D897941
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: October 6, 2020
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Hideki Hamanaka, Kotaro Iwabuchi