Patents by Inventor Yoshiji Shimaoka

Yoshiji Shimaoka 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).

  • Power transmission device for motor vehicle
    Patent number: 4781653
    Abstract: A power transmission device for a motor vehicle having an engine with a crankshaft and a transmission with a transmission input shaft, comprises spiral spring assembly which provides a torque transmission connection between the crankshaft and the transmission input shaft. The assembly includes a plurality of spiral springs operative to be deformed responsive to torsional force applied thereto during the torque transmission. A vibration damper is mounted to damp vibration caused by the above mentioned torque transmission.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: November 1, 1988
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Koyo Nakamura, Yukihiro Etoh, Kenji Okamura, Yoshiji Shimaoka