Patents by Inventor Masayuki Kawamoto

Masayuki Kawamoto 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).

  • Damping force control system for shock absorber variable with frequency of vehicle height difference exceeding limit value
    Patent number: 4984820
    Abstract: In a damping force control system for switching over a shock absorber in the suspension of a vehicle from a low damping force operation to a high damping force operation when a vehicle height difference exceeds a certain limit value, the frequency of the vehicle height difference exceeding the certain limit value is counted for each certain cycle period, and the shock absorber is controlled to provide the high damping force operation for a time duration in each cycle period, the ratio of the time duration to the cycle period being varied in accordance with the frequency so that the ratio is increased along with an increase of the frequency.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: January 15, 1991
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiromitsu Uchiyama, Masayuki Kawamoto, Yoriko Inada