Patents by Inventor Osamu Noji

Osamu Noji 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).

  • Steady operation method for hydraulic machine operating at variable speed
    Patent number: 4790135
    Abstract: A steady operation method for a hydraulic machine such as a generator operating at a variable revolution speed is performed in accordance with the following steps. A head or load of the hydraulic machine is first detected and a basic signal is obtained on the basis of the thus detected value so as to control the revolution speed of the hydraulic machine. On the other hand, a vibration or hydraulic pressure variation is detected and the thus detected value is converted into an auxiliary signal through an auxiliary signal converter. The revolution speed of the hydraulic machine operating at a variable speed is controlled in such a manner as that the revolution speed is controlled by the basic signal when the auxiliary signal is below a predetermined upper limit thereof regarding the vibration or hydraulic pressure variation, and otherwise, the revolution speed is controlled by a signal other than the basic signal when the auxiliary signal is beyond the upper limit thereof.
    Type: Grant
    Filed: April 24, 1987
    Date of Patent: December 13, 1988
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Osamu Noji