Patents by Inventor Seiichi Sohmiya

Seiichi Sohmiya 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).

  • Apparatus and method for controlling water turbine
    Patent number: 4168935
    Abstract: An apparatus for controlling a water turbine is disclosed wherein an auxiliary servomotor having a capacity substantially equal to that of a servomotor for actuating pressure regulator is provided for actuating flow control guide vanes, the auxiliary servomotor for the guide vanes and the servomotor for the pressure regulator being connected through pipe lines. The guide vanes for the water turbine are controlled according to a position of an auxiliary servomotor for the governor and the servomotor for the pressure regulator is controlled according to a difference between the opening position of the guide vanes and the set position of a load limiter for the water turbine.
    Type: Grant
    Filed: January 13, 1978
    Date of Patent: September 25, 1979
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Tsuneo Ueda, Seiichi Sohmiya