Patents by Inventor Haruyuki Yamasaki

Haruyuki Yamasaki 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).

  • Multistage rotary compressor and refrigeration circuit system
    Patent number: 6748754
    Abstract: In a multistage rotary compressor using a refrigerant such as carbon dioxide (CO2) and the like which becomes high in a discharge pressure, operating efficiency thereof can be enhanced by appropriately setting the ratio between displacement of the respective rotary compression elements and the areas of discharge ports thereof.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: June 15, 2004
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kenzo Matsumoto, Noriyuki Tsuda, Haruyuki Yamasaki, Kazuya Sato, Masaya Tadano
  • Multistage rotary compressor and refrigeration circuit system
    Publication number: 20030172666
    Abstract: In a multistage rotary compressor using a refrigerant such as carbon dioxide (CO2) and the like which becomes high in a discharge pressure, operating efficiency thereof can be enhanced by appropriately setting the ratio between displacement of the respective rotary compression elements and the areas of discharge ports thereof.
    Type: Application
    Filed: March 13, 2003
    Publication date: September 18, 2003
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Kenzo Matsumoto, Noriyuki Tsuda, Haruyuki Yamasaki, Kazuya Sato, Masaya Tadano