Patents by Inventor Yuusaku Sakai

Yuusaku Sakai 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).

  • Circumferential flow pump
    Patent number: 7290979
    Abstract: In a circumferential flow pump, a first groove sectional area (S1) of a feed passage at a pump cover side is set to be smaller than a second groove sectional area (S2) of a feed passage at a pump base side, whereby the diameter of an eddy flow occurring in the first groove sectional area (S1) is smaller than the diameter of an eddy flow occurring in the second groove sectional area (S2). Therefore, the fuel pressure of the feed passage at the pump cover side is set to be higher than that of the feed passage at the pump base side, and thus a vane wheel is formed to be pressed against the pump base side.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: November 6, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Koyama, Yuusaku Sakai
  • Circumferential flow pump
    Publication number: 20060120852
    Abstract: In a circumferential flow pump, a first groove sectional area (S1) of a feed passage at a pump cover side is set to be smaller than a second groove sectional area (S2) of a feed passage at a pump base side, whereby the diameter of an eddy flow occurring in the first groove sectional area (S1) is smaller than the diameter of an eddy flow occurring in the second groove sectional area (S2). Therefore, the fuel pressure of the feed passage at the pump cover side is set to be higher than that of the feed passage at the pump base side, and thus a vane wheel is formed to be pressed against the pump base side.
    Type: Application
    Filed: April 6, 2005
    Publication date: June 8, 2006
    Inventors: Masahiro Koyama, Yuusaku Sakai