Patents by Inventor Mayuko Karasawa

Mayuko Karasawa 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: 20240336090
    Abstract: Provided in this disclosure is a tire with a meandering groove extending along tire circumferential direction formed on a tread surface, wherein the meandering groove has a groove width in tire width direction that varies at a predetermined repetitive cycle along the tire circumferential direction, ratio of the maximum and minimum widths of the groove width, Wmin/Wmax, is 0.35 to 0.85, a first groove wall and a second groove wall, which are both groove walls of the meandering groove, meander and extend in a sinusoidal manner with the predetermined repetition cycle as one cycle length in a tread surface view, and in the tread surface view, a first sinusoidal curve formed by the first groove wall and a second sinusoidal curve formed by the second groove wall are arranged with a phase difference of 1/8 to 3/8 cycle in the tire circumferential direction.
    Type: Application
    Filed: June 22, 2022
    Publication date: October 10, 2024
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Mayuko KARASAWA
  • Publication number: 20240109374
    Abstract: A pneumatic tire including a center block row 21 provided in a center area of a tread surface 1, wherein the center block row includes a plurality of center blocks 210 arranged along a tire circumferential direction, the plurality of center blocks includes a plurality of first center blocks 211 and a plurality of second center blocks 212, the plurality of first center blocks and the plurality of second center blocks have polygonal shapes on the tread surface, the polygonal shape formed by each second center block has a same number of sides as, but a different shape than, the polygonal shape formed by each first center block, each first center block and each second center block has one or more sipes, and a number n of sipes included in each second center block is greater than a number m of sipes included in each first center block.
    Type: Application
    Filed: November 5, 2021
    Publication date: April 4, 2024
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Mayuko KARASAWA, Shungo FUJITA, Kai YAMADA
  • Publication number: 20240109373
    Abstract: A pneumatic tire that includes a tread surface 1 including: two or more main grooves 3; and a pair of middle block rows 22, wherein one or more first middle blocks in the plurality of middle blocks each have a middle block inclined side wall surface 223 that faces an outer main groove in the pair of outer main grooves and that gradually inclines inwards in a tire radial direction as the middle block inclined side wall surface extends outwards in the tire width direction, and the middle block inclined side wall surface forms an acute angle ?223 of 30° to 50° with respect to a normal of the tread surface at an inner end in the tire width direction of the middle block inclined side wall surface.
    Type: Application
    Filed: November 5, 2021
    Publication date: April 4, 2024
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Mayuko KARASAWA, Kai YAMADA
  • Publication number: 20230219375
    Abstract: A tire includes a first circumferential main groove 11 and a second circumferential main groove 12 in a tread surface 1. A resonator 21 is formed in an intermediate land portion 20 partitioned between the first circumferential main groove and the second circumferential main groove. The resonator has an auxiliary groove 211 whose both ends terminate within the intermediate land portion. The groove depths D1 of the first and second circumferential main grooves are 50% or less of the groove widths W2 of the first and second circumferential main grooves, respectively. The groove width W3 of the auxiliary groove of the resonator is 80% or less of the groove depth D1 of the first circumferential main groove.
    Type: Application
    Filed: May 6, 2021
    Publication date: July 13, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yoshiki NAKATA, Mayuko KARASAWA
  • Publication number: 20230173850
    Abstract: A tire includes a first circumferential main groove 11 and a second circumferential main groove 12 in a tread surface 1. A resonator 21 is formed in an intermediate land portion 20 partitioned between the first circumferential main groove and the second circumferential main groove. The resonator has an auxiliary groove 211 whose both ends terminate within the intermediate land portion. The groove depths D1 of the first and second circumferential main grooves are 50% or less of the groove widths W2 of the first and second circumferential main grooves, respectively. The groove depth D3 of the auxiliary groove of the resonator is 70% or more of the groove depth D1 of the first circumferential main groove.
    Type: Application
    Filed: May 6, 2021
    Publication date: June 8, 2023
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yoshiki NAKATA, Mayuko KARASAWA
  • 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
  • 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
  • Patent number: D957311
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: July 12, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Mayuko Karasawa, Kohei Sahashi
  • Patent number: D981945
    Type: Grant
    Filed: April 27, 2021
    Date of Patent: March 28, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Mayuko Karasawa
  • Patent number: D1008941
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: December 26, 2023
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Keiichi Hanami, Mayuko Karasawa