Patents by Inventor Ryohei Takemori

Ryohei Takemori 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: 20210170807
    Abstract: A pneumatic tire is provided. In a meridian cross-section, an external contour shape of the bead core is a polygon formed by common tangent lines of a plurality of circumferential portions of a bead wire, the external contour shape includes a single vertex located toward the outside in a tire radial direction, an internal angle formed by two sides sandwiching the vertex is an acute angle, a bottom side of the external contour shape is inclined with respect to the tire lateral direction by from 2° to 9°, and the carcass layer is bent and folded back along a circumference of the bead core in a bead portion, a folded back portion of the carcass layer from a position of an outer end of the bead core in the tire radial direction extends toward a sidewall portion in contact with a body portion.
    Type: Application
    Filed: November 19, 2018
    Publication date: June 10, 2021
    Inventors: Ryohei Takemori, Masaaki Nagayasu, Yuki Sasaya, Atsushi Tanno, Hiraku Kouda, Jun Matsuda
  • Patent number: 10899177
    Abstract: A pneumatic tire is provided whereby superior driving performance on muddy ground, snowy roads, sandy land, and the like can be obtained. The pneumatic tire includes main grooves provided in shoulder regions of a tread portion and extending in a tire circumferential direction; a plurality of lug grooves extending outward in a tire width direction from the main grooves and reaching sidewall portions; and a plurality of blocks that is partitioned by the main grooves and the lug grooves. In this pneumatic tire, a raised portion protruding from the blocks is provided at an end portion on an outer side in the tire width direction of the blocks; and the raised portion extends in the tire circumferential direction so as to protrude into the lug grooves positioned on both sides of the raised portion.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: January 26, 2021
    Inventor: Ryohei Takemori
  • Publication number: 20200376903
    Abstract: In a pneumatic tire including a side reinforcing layer, the maximum width W0of a bead core and the widths W1, W2 of the bead core at innermost and outermost sides in the radial direction, respectively, satisfy W1>W2 and W2?0.5×W0. W0 is toward the inside of the center of the bead core in the radial direction. A carcass is folded and curved along the bead core, and a folded back portion of the carcass extends toward the sidewalls while contacting a body of the carcass. A rubber occupancy ratio in a region formed by the body and the folded back portion of the carcass is 0.1% to 15%. The cross-sectional area S2 of a filler toward the outside of the carcass in the lateral direction, the hardness H2 of the filler, the cross-sectional area S1of a side reinforcing layer and the hardness H1 of the side reinforcing layer satisfy 0.15?(S2×H2)/(S1×H1)?0.60.
    Type: Application
    Filed: December 4, 2018
    Publication date: December 3, 2020
    Inventors: Hiraku Kouda, Jun Matsuda, Atsushi Tanno, Masaaki Nagayasu, Ryohei Takemori, Yuki Sasaya
  • Publication number: 20200376904
    Abstract: Of layers configuring a bead core of a pneumatic tire, the width W0 of one of the layers including the greatest number of rows, the width W1, W2 of other of the layers located respectively innermost and outermost in the radial direction satisfy W1>W2 and W2?0.5×W0. The position of width W0 is inward in the radial direction of the center of the bead core. A carcass is folded and curved along the bead core and extends toward sidewalls where a folded back portion of the carcass contacts a body of the carcass. A rubber occupancy ratio in a closed region formed by the body and the folded back portion is 0.1% to 15%. The cross-sectional area S2 and hardness H2 of a filler outward of the carcass in the lateral direction, and the cross-sectional area S1 and the hardness H1 of the side reinforcing layer satisfy 0.12?(S2×H2)/(S1×H1)?0.50.
    Type: Application
    Filed: December 4, 2018
    Publication date: December 3, 2020
    Inventors: Atsushi Tanno, Hiraku Kouda, Jun Matsuda, Masaaki Nagayasu, Yuki Sasaya, Ryohei Takemori
  • Publication number: 20200324581
    Abstract: A pneumatic tire includes: an indicator portion on tire side portions located at opposite sides in a lateral direction; a first decorative portion on the side portion and arranged at a location different from a location in a tire circumferential direction of the indicator portion, the first decorative portion including ridges aligned in rows; and a second decorative portion on the side portion, wherein a portion in a radial direction occupies the same location in the radial direction as the first decorative portion, the second decorative portion being interposed between the indicator portion and the first decorative portion in the circumferential direction and arranged to be separated from the indicator portion and the first decorative portion, the second decorative portion including ridges aligned in rows, the ridges being oriented at an angle different from an angle of the ridges of the first decorative portion with respect to the radial direction.
    Type: Application
    Filed: May 25, 2017
    Publication date: October 15, 2020
    Inventor: Ryohei Takemori
  • Publication number: 20200324580
    Abstract: A pneumatic tire includes a tread section, a bead section, and a sidewall section. The sidewall section is provided in a predetermined region in a tire radial direction with: a first decorative section provided with a serration section including ridges protruding on an external surface of the sidewall section, the ridges being disposed adjacent to each other in a tire circumferential direction; a second decorative section disposed adjacent to an end portion of the first decorative section in the tire circumferential direction and being provided with a serration section including ridges protruding on the external surface, the ridges being disposed adjacent to each other in the tire circumferential direction; and a recessed section disposed adjacent to the second decorative section and being recessed inward from the second decorative section in the tire radial direction.
    Type: Application
    Filed: May 25, 2017
    Publication date: October 15, 2020
    Inventor: Ryohei Takemori
  • Patent number: 10179483
    Abstract: This pneumatic tire (1) is provided with a plurality of circumferential main grooves (21, 22) extending in a tire circumferential direction, a plurality of land portions (31 to 33) defined by these circumferential main grooves (21, 22), and a plurality of lug grooves (41 to 43) disposed in these land portions (31 to 33). Additionally, at least one column of land portion (32) in a tread portion center region is provided with a plurality of blocks divided in the tire circumferential direction by the plurality of lug grooves (42) and a three-dimensional sipe (52) that extends over an entire circumference of the tire and divides the land portion (42) in a tire width direction.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: January 15, 2019
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Ryohei Takemori
  • Publication number: 20180022162
    Abstract: A pneumatic tire is provided whereby superior driving performance on muddy ground, snowy roads, sandy land, and the like can be obtained. The pneumatic tire includes main grooves provided in shoulder regions of a tread portion and extending in a tire circumferential direction; a plurality of lug grooves extending outward in a tire width direction from the main grooves and reaching sidewall portions; and a plurality of blocks that is partitioned by the main grooves and the lug grooves. In this pneumatic tire, a raised portion protruding from the blocks is provided at an end portion on an outer side in the tire width direction of the blocks; and the raised portion extends in the tire circumferential direction so as to protrude into the lug grooves positioned on both sides of the raised portion.
    Type: Application
    Filed: January 28, 2016
    Publication date: January 25, 2018
    Inventor: Ryohei Takemori
  • Publication number: 20170057297
    Abstract: This pneumatic tire (1) is provided with a plurality of circumferential main grooves (21, 22) extending in a tire circumferential direction, a plurality of land portions (31 to 33) defined by these circumferential main grooves (21, 22), and a plurality of lug grooves (41 to 43) disposed in these land portions (31 to 33). Additionally, at least one column of land portion (32) in a tread portion center region is provided with a plurality of blocks divided in the tire circumferential direction by the plurality of lug grooves (42) and a three-dimensional sipe (52) that extends over an entire circumference of the tire and divides the land portion (42) in a tire width direction.
    Type: Application
    Filed: April 14, 2015
    Publication date: March 2, 2017
    Applicant: The Yokohama Rubber Co., LTD.
    Inventor: Ryohei Takemori
  • Publication number: 20170057296
    Abstract: This pneumatic tire is provided with: a circumferential main groove (22) extending in a tire circumferential direction, a shoulder land portion (33) defined by the circumferential main groove (22), and a plurality of lug grooves (43) disposed in the shoulder land portion (33). Additionally, the shoulder land portion (33) is provided with a dimple (6) for mud discharge that is disposed between lug grooves (43, 43) adjacent in the tire circumferential direction and extends in a tire width direction without communicating to a lug groove (43). Additionally, a distance Dd between an end portion of the dimple (6) on a tire-width-direction inner side and a tire ground contact edge (T) is in a range of ?10 mm?Dd?10 mm.
    Type: Application
    Filed: April 14, 2015
    Publication date: March 2, 2017
    Inventor: Ryohei Takemori
  • Patent number: D837722
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: January 8, 2019
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Ryohei Takemori
  • Patent number: D875658
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: February 18, 2020
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Ryohei Takemori
  • Patent number: D875659
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: February 18, 2020
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Ryohei Takemori