Patents by Inventor Kiyoshi Oonuma

Kiyoshi Oonuma 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).

  • Torque converter with narrowed flow passages
    Patent number: 4186557
    Abstract: A torque converter is proposed where the height of the vanes on at least the turbine wheel is reduced somewhat compared with conventional designs at their middle portions, so that the generation of eddies and turbulence in the flow of transmission fluid past those portions which are the most sharply curved portions of the vanes is avoided.
    Type: Grant
    Filed: January 16, 1979
    Date of Patent: February 5, 1980
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Hajime Arai, Kiyoshi Oonuma