Patents by Inventor Hirotake Kato

Hirotake Kato 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).

  • Wheel suspension system and spring therefor
    Patent number: 6460835
    Abstract: Provided is a wheel suspension system (4) and a spring (6, 16, 26) therefor which can improve the ride comfort of the vehicle by reducing the sliding resistance between the cylinder and the piston of the tubular shock absorber (5) surrounded by the compression coil spring without increasing the size of the suspension system and without complicating the assembly work. The compression coil spring is adapted to produce lateral forces between two ends thereof as the compression coil spring is extended and compressed by forming the coil spring so as to have cyclically varying pitch angle for each turn of the coil wire.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: October 8, 2002
    Assignee: NHK Spring Co., Ltd.
    Inventors: Toshio Hamano, Hirotake Kato, Iwao Shigeoka, Takahiro Nakamura, Toshiyuki Kamakura, Masaya Komazaki