Patents by Inventor Saburou Gotou

Saburou Gotou 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).

  • Driving power unit for piezoactuator system and method
    Patent number: 5138217
    Abstract: A driving power unit for a piezoactivator is disclosed that utilizes a semiconductor switching device for supplying power to the piezoelement. When the voltage measured across the piezoelement attains a predetermined valve, the semiconductor switching device turns off. Sensing devices cause the switching device to turn on upon the voltage dropping by a predetermined margin and cause the voltage source to turn off when the switching device remains on beyond a predetermined time period. Memory and logic circuitry also control the switching sequence of the switching device.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: August 11, 1992
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Tatuya Wada, Hiroshi Hikita, Nobutaka Machida, Mituharu Nonami, Yukinori Kawamura, Tomohiro Takigawa, Saburou Gotou