Patents by Inventor Yasujiro Daisho

Yasujiro Daisho 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: 20100243117
    Abstract: Provided is a pneumatic tire in which the performance change of driving stability due to continuous driving can be suppressed even with a carcass layer, which has a single-ply structure and a wound-up section extended up to a region below a belt layer so as to overlap with an end section of the belt layer.
    Type: Application
    Filed: May 7, 2008
    Publication date: September 30, 2010
    Applicant: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Yasujiro Daisho
  • Publication number: 20080058974
    Abstract: Evaluation tires, each having a plurality of structural elements including a target structural element, are prepared. Only the experimental structure of the target structural element is different among all the evaluation tires, while the structures of other structural elements are identical. Radial force variation of each of the evaluation tires is measured. Corrected radial-force variation of each of the evaluation tires is calculated by subtracting a 1st order component of the radial force variation from the radial force variation, and the structure of the target structural element is determined based on the corrected radial-force variations of the evaluation tires. This process is repeated for other structural elements.
    Type: Application
    Filed: August 21, 2007
    Publication date: March 6, 2008
    Inventors: Sachio Nakamura, Yasujiro Daisho
  • Patent number: 5885385
    Abstract: At least one reinforcing rubber layer is provided in the part of each of two side wall portions which is on the outer side of a carcass layer. The outer circumferential end portions of the reinforcing rubber layers extend to positions in which they are disposed between the end portions of the innermost belt layer and the corresponding portions of the carcass layer, while the inner circumferential end portions of these rubber layers extend inward in the radial direction of the tire so as to overlap the bead fillers in positions on the outer sides of the end portions of the carcass layer in the widthwise direction of the tire. A 100% modulus at 100.degree. C. of the rubber constituting the reinforcing rubber layers is not higher than that of the rubber of the belt layers, and a dynamic elastic modulus at 20.degree. C. of the former rubber in the range of 10-40 MPa.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: March 23, 1999
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hikomitsu Noji, Masaki Noro, Yasujiro Daisho, Issey Nakakita
  • Patent number: 5291929
    Abstract: A pneumatic tire having a plurality of main grooves extending in the circumferential direction of a tread surface, and a plurality of auxiliary grooves each of which is disposed in the shape of the letter "V" and extended in one of the circumferential directions of the tread surface, the apexes of the V-shaped auxiliary grooves being distributed in left and right regions each extending from the equator of the tire as much as 5-25% of the width of a ground contacting portion of the tread surface, in such a manner that the numbers of the apexes in the left and right regions become substantially equal to each other, characterized in that quasi-main grooves each of which connects at least two circumferentially arranged auxiliary grooves together are provided in left and right regions each extending from the equator of the tire as much as 25-50% of the width of a ground contacting portion of the tread surface, in such a manner that the quasi-main grooves are inclined at an angle of 5.degree.-25.degree.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: March 8, 1994
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Yasujiro Daisho, Susumu Watanabe, Izumi Kuramochi
  • Patent number: D507233
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: July 12, 2005
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Yasujiro Daisho, Masahiro Ebiko, Hiroshi Tokizaki, Takumi Morito
  • Patent number: D348862
    Type: Grant
    Filed: September 15, 1992
    Date of Patent: July 19, 1994
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Yasujiro Daisho, Susumu Watanabe, Izumi Kuramochi, Kohtaroh Iwabuchi