Patents by Inventor Hiroto Yoshikai

Hiroto Yoshikai 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).

  • Centrifugal compressor and vaned diffuser
    Patent number: 5709531
    Abstract: A centrifugal compressor comprises a centrifugal impeller and a vaned diffuser. The diffuser includes a pair of diffuser plates and a plurality of guide vanes arranged between the pair of diffuser plates in a circular cascade manner. The guide vanes are equal in leading-edge radius to each other, but are different in length from each other. At least one short guide vane is arranged between the adjacent long guide vanes. The total number of the guide vanes is more than the number of blades of the impeller. A throat is formed on one but not the other of flow passages between the guide vanes.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: January 20, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Nishida, Hiromi Kobayashi, Haruo Miura, Hiroto Yoshikai, Sadashi Tanaka
  • Centrifugal compressor and vaned diffuser
    Patent number: 5516263
    Abstract: A centrifugal compressor comprises a centrifugal impeller and a vaned diffuser. The diffuser includes a pair of diffuser plates and a plurality of guide vanes arranged between the pair of diffuser plates in a circular cascade manner. The guide vanes are equal in leading-edge radius to each other, but are different in length from each other. At least one short guide vane is arranged between the adjacent long guide vanes. The total number of the guide vanes is more than the number of blades of the impeller. A throat is formed in only a part of flow passages between the guide vanes.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: May 14, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Nishida, Hiromi Kobayashi, Haruo Miura, Hiroto Yoshikai, Sadashi Tanaka