Patents by Inventor Takeshi Fujihisa

Takeshi Fujihisa 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).

  • Compressor start-up controller
    Patent number: 5518373
    Abstract: A compressor start-up controller includes a compressing section (37-39) for compressing a refrigerant; a motor (25) connected to the compressing section for rotating the compressing section; a drive circuit (10) connected to the motor for driving the motor; a rotation detecting device (1) connected to the drive circuit for detecting whether the motor is normally rotating; a control unit (8) connected to the drive circuit for operating the motor in a step mode at a very slow rotation at its start-up for effecting electricity conducting control to gradually increase or decrease commutating current at a very slow speed during the step mode operation at the motor start-up.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: May 21, 1996
    Assignees: Zexel Corporation, Epson Corporation
    Inventors: Nobukazu Takagi, Kiyohiro Harada, Sakae Mashio, Akihito Uetake, Osamu Shinkawa, Takeshi Fujihisa