Patents by Inventor Kiyoji Tanimoto

Kiyoji Tanimoto 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).

  • Butterfly valve
    Patent number: 4318422
    Abstract: A butterfly valve is adapted to pivot a valve stem to a valve body through openings formed in a ring-shaped elastic valve seat attached inside the valve body, to slidably contact the valve member and the inner face of the valve seat each other in the vicinity of the valve stem, and to form recesses for charging lubricant in the slidably contacting face on the valve seat or on the side face of the valve member.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: March 9, 1982
    Assignee: Tomoe Technical Research Company
    Inventors: Mikimaro Nakanishi, Kiyoji Tanimoto