Patents by Inventor Yamada Hidehiko

Yamada Hidehiko 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).

  • Rotary type compressing apparatus employing exhaust gas control valve
    Patent number: 4830582
    Abstract: In a rotary type compressing apparatus, a check valve is positioned in a refrigerant gas inhalation unit, and an exhaust valve is positioned in a refrigerant gas exhaust unit. In addition, a control valve is employed at an inlet section of an exhaust pipe. One end of this exhaust pipe is opened inside a muffler which forms airtight space within a closed case. This control valve is actuated by means of a slider valve body by receiving specific pressure.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: May 16, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazutomo Asami, Yamada Hidehiko, Nobuhiro Shimizu