Patents by Inventor Kazuhisa Usui

Kazuhisa Usui 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).

  • Overrunning clutch device for engine starting unit
    Patent number: 4114746
    Abstract: An overrunning clutch device including a thrust ring slidably fitted in the driven clutch member and held connected with the driving clutch member and a set of spherical centrifugal weights mounted on respective radially flexible resilient arms of a weight retainer, which is fixed to the driven clutch member integral with a drive pinion. The centrifugal weights are held in rolling contact with a tapered annular guide surface of the thrust ring and act to force the latter and hence the driving clutch member away from the driven clutch member under centrifugal force when their speed of rotation exceeds a predetermined level.
    Type: Grant
    Filed: March 31, 1977
    Date of Patent: September 19, 1978
    Assignee: Sawafuji Denki Kabushiki Kaisha
    Inventors: Kazuhisa Usui, Osamu Muto