Patents by Inventor Fumihiro Nimura

Fumihiro Nimura 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).

  • Fluid pump having pressure pulsation reducing passage
    Patent number: 6082984
    Abstract: A fuel pump comprises a pump unit and a motor unit. The pump unit is a trochoid gear type having rotors in a pump chamber defined by a pair of side plates and a cylindrical housing. A disk plate is attached to the side plate to provide an arcuate-shaped pressure pulsation reducing passage jointly with the side plate. Protrusions or recesses are provided in the passage to cause turbulence in fuel flowing through the passage. This turbulence scatters pressure pulsation in the fuel thereby to reduce the pressure pulsation.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: July 4, 2000
    Assignee: Denso Corporation
    Inventors: Tatsuya Matsumoto, Motoya Ito, Fumihiro Nimura