Patents by Inventor Yuzo Hashimoto

Yuzo Hashimoto 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 stem driving apparatus
    Patent number: 5224512
    Abstract: A valve stem driving apparatus comprises a valve stem which has first and second ends, the second end being connected to a valve body. The valve stem is engaged with a stem nut. A distance measuring device is provided in an upper cover for the valve stem and measures a distance between the upper cover and the first end of the valve stem, so that wear rate of the valve stem and/or the stem nut is determined.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: July 6, 1993
    Assignees: Shikoku Research Institute Inc., Shikoku Electric Power Company, Inc., Nippon Gear Co., Ltd.
    Inventors: Takeki Nogami, Kunio Matsushita, Susumu Watanabe, Yuzo Hashimoto