Patents by Inventor Sakae Yamada

Sakae Yamada 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).

  • Monitoring system for screw compressor
    Patent number: 4502833
    Abstract: A monitoring system for a screw compressor for checking the operating conditions of the screw compressor by opening and closing a suction throttle valve located on the suction side of the screw compressor and an air discharge valve located on the discharge side thereof to thereby effect on-off control of the flow rate of the discharged air, wherein the operating conditions of components of the screw compressor are checked both in on-load and unloaded conditions by comparing values of the suction pressure, discharge pressure and discharged air temperature of the screw compressor with respective preset values.
    Type: Grant
    Filed: October 15, 1982
    Date of Patent: March 5, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Yozo Hibino, Sakae Yamada