Patents by Inventor Kiyoshi Narita

Kiyoshi Narita 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).

  • Turbomolecular pump
    Patent number: 4732529
    Abstract: A turbomolecular pump for performing exhaustion by rotating rotors, which pump comprises a blade group consisting of alternately arranged rotors and stators blades and which has a compression ratio raising section in said blade group at a portion on the exhaust port side or an intermediate portion. The compression ratio raising section comprising a rotor whose blade is thicker than a rotor located closer to the suction port side. This turbomolecular pump has good pumping efficiency for lower vacuum range.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: March 22, 1988
    Assignee: Shimadzu Corporation
    Inventors: Kiyoshi Narita, Jyuichi Kawaguchi