Patents by Inventor Minoru Oki

Minoru Oki 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 piston compressor and refrigerating equipment
    Patent number: 6336336
    Abstract: In a rotary piston compressor and refrigerating equipment employing the rotary piston compressor, the interior of a cylinder chamber is divided into a suction chamber and a compression chamber by a vane which is formed unitarily with a roller. The rotary bushing on the compression chamber side which supports the vane is so arranged as to be moved with a specific pressure, so that a communicating passage for communication between the compression chamber and a space on the discharge side will be opened and closed with the movement of the rotary bushing on the compression chamber side.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: January 8, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Shigeya Kawaminami, Tatsuya Wakana, Kenichi Oshima, Minoru Oki, Tatsuo Horie