Patents by Inventor Shinichi Shigehara

Shinichi Shigehara 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).

  • Method for calculating characteristic curve of centrifugal fluid machine by computer
    Patent number: 6671657
    Abstract: A computer-implemented method of calculating various types of characteristic curves of a centrifugal fluid machine according to the present invention can easily calculate a Q-H characteristic curve, a Q-E characteristic curve, a Q-NPSH characteristic curve, or the like. The method of calculating various types of characteristic curves uses two prescribed characteristic curves Y1=a11+a12x+a13x2+ . . . +a1nx(n−1) and Y2=a21+a22x+a23x2+ . . . +a2nx(n−1) formed of high-order equations for a centrifugal fluid machine to calculate a characteristic curve Y3=b1+b2x+b3x2+ . . . +bnx(n−1) formed of a high-order equation which passes through different coordinates (x3, y3).
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: December 30, 2003
    Assignee: Ebara Corporation
    Inventors: Shinichi Shigehara, Junji Maruyama
  • Method for calculating characteristic curve of centrifugal fluid machine by computer
    Publication number: 20030060989
    Abstract: A computer-implemented method of calculating various types of characteristic curves of a centrifugal fluid machine according to the present invention can easily calculate a Q-H characteristic curve, a Q-E characteristic curve, a Q-NPSH characteristic curve, or the like. The method of calculating various types of characteristic curves uses two prescribed characteristic curves Y1=a11+a12x+a13x2+ . . . +a1nx(n−1) and Y2=a21+a22x+a23x2+ . . . +a2nx(n−1) formed of high-order equations for a centrifugal fluid machine to calculate a characteristic curve Y3=b1+b2x+b3x2+ . . . +bnx(n−1) formed of a high-order equation which passes through different coordinates (x3, y3).
    Type: Application
    Filed: October 17, 2002
    Publication date: March 27, 2003
    Inventors: Shinichi Shigehara, Junji Maruyama