Patents by Inventor Takahide Ishizaka

Takahide Ishizaka 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: 20220097456
    Abstract: A tire includes a circumferential narrow main groove extending in a tire circumferential direction provided in a tread portion. The circumferential narrow main groove includes a narrow groove portion having a groove width W1 in a range of 1.0 mm?W1?4.0 mm in a region where a groove depth from a road contact surface of the tread portion is less than 30%, and a widened portion having a maximum groove width W2 more widened than the groove width W1 in a region where the groove depth is 30% or more.
    Type: Application
    Filed: September 22, 2021
    Publication date: March 31, 2022
    Inventor: Takahide ISHIZAKA
  • Publication number: 20210300122
    Abstract: A tire includes a pair of shoulder main grooves and one or more center main grooves extending in a tire circumferential direction and four or more rows of land portions defined by the pair of shoulder main grooves and the one or more center main grooves. Each of the pair of shoulder main grooves includes a groove opening portion having a wave-like shape with an amplitude in a tire width direction. Each of the pair of shoulder main grooves includes a groove bottom portion having a zigzag shape with an amplitude in the tire width direction. The groove opening portion in each of the pair of shoulder main grooves has an amplitude A1_sh having a relationship A1_sh<A2_sh with respect to an amplitude A2_sh of the groove bottom portion.
    Type: Application
    Filed: March 19, 2021
    Publication date: September 30, 2021
    Inventors: Takahide Ishizaka, Hiroto Kikuchi
  • Patent number: 9290056
    Abstract: The pneumatic tire 1 includes a belt layer 14 that is formed by laminating a plurality of belt plies 141 to 145 including the circumferential reinforcing layer 145. Also, the belt layer 14 includes at least two belt plies on the outer side in the tire radial direction of the circumferential reinforcing layer 145. Also, the intercord distances T1 to Tk have a relationship such that T1?T2? . . . ?Tk and T1<Tk.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: March 22, 2016
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Takahide Ishizaka, Kouichi Kawabata
  • Publication number: 20140373992
    Abstract: The pneumatic tire 1 includes a belt layer 14 that is formed by laminating a plurality of belt plies 141 to 145 including the circumferential reinforcing layer 145. Also, the belt layer 14 includes at least two belt plies on the outer side in the tire radial direction of the circumferential reinforcing layer 145. Also, the intercord distances T1 to Tk have a relationship such that T1<T2? . . . ?Tk and T1<Tk.
    Type: Application
    Filed: September 2, 2011
    Publication date: December 25, 2014
    Applicant: The Yokohama Rubber Co., LTD.
    Inventors: Takahide Ishizaka, Kouichi Kawabata
  • Patent number: 8215352
    Abstract: A pneumatic tire includes a wide cross belt having a width not smaller than 92% and not lager than 100% of a width of a tread; and a narrow cross belt having a width smaller than that of the wide cross belt and a tire width direction outer end positioned on a tire width direction outer side with respect to a tire width direction inner edge of an outermost land portion. The tread has open sipes penetrating through the outermost land portion in the tire width direction and formed along the tire circumferential direction, and lug grooves extending along the open sipes on a contact surface of the outermost land portion and having a tire width direction outer end positioned between a tire width direction outer end of the wide cross belt and the tire width direction outer end of the narrow cross belt.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: July 10, 2012
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Takahide Ishizaka
  • Publication number: 20090114325
    Abstract: A pneumatic tire includes a wide cross belt having a width not smaller than 92% and not lager than 100% of a width of a tread; and a narrow cross belt having a width smaller than that of the wide cross belt and a tire width direction outer end positioned on a tire width direction outer side with respect to a tire width direction inner edge of an outermost land portion. The tread has open sipes penetrating through the outermost land portion in the tire width direction and formed along the tire circumferential direction, and lug grooves extending along the open sipes on a contact surface of the outermost land portion and having a tire width direction outer end positioned between a tire width direction outer end of the wide cross belt and the tire width direction outer end of the narrow cross belt.
    Type: Application
    Filed: October 29, 2008
    Publication date: May 7, 2009
    Applicant: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Takahide Ishizaka
  • Patent number: D857619
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: August 27, 2019
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Takahide Ishizaka
  • Patent number: D865654
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: November 5, 2019
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Takahide Ishizaka
  • Patent number: D904285
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: December 8, 2020
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Takahide Ishizaka