Patents by Inventor Keiichi Yanase

Keiichi Yanase 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).

  • Valve
    Patent number: 4372532
    Abstract: A valve comprising an elastically flexible diaphragm and an annular stopper, the stopper being adapted to control shifting and flexion of the diaphragm under fluid pressure when the valve is closed in such a manner that the stopper abuts against the diaphragm intermediately between a part thereof contacting a valve diaphragm seat and a part thereof connected to a valve closure member.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: February 8, 1983
    Assignee: Kubota, Ltd.
    Inventors: Ryozo Yamamoto, Keiichi Yanase, Junzo Oku