Patents by Inventor Kenji Hashirayama

Kenji Hashirayama 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).

  • Suspension system
    Patent number: 6308974
    Abstract: A suspension system 10 has one or more protrusive seating portions 21L;22L, on which a coil spring 13 is situated, and is formed in a partly circumferential portion of a spring seat 14L supporting the coil spring 13, and a tapered surface 23L for preventing body warp or bending of the coil spring 13 in a circumferential portion of at least one protrusive seating portion 22L.
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: October 30, 2001
    Assignee: Showa Corporation
    Inventors: Kenji Hashirayama, Yoshihisa Nakamura
  • Spring seat fixing structure for a hydraulic shock absorber
    Patent number: 6217012
    Abstract: In a spring seat fixing structure of a hydraulic shock absorber (10), a proximal end side of a cap (44) is provided with a small diameter force-fit portion (71) which is fixedly forced into a small outer diameter portion (51) of a damper tube (11), and a distal end side of the cap (44) is provided with a large diameter force-fit portion (73) which is fixedly forced into a large outer diameter portion (52) of the damper tube (11).
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: April 17, 2001
    Assignee: Showa Corporation
    Inventor: Kenji Hashirayama