Patents by Inventor Shigetaroo Tagawa

Shigetaroo Tagawa 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).

  • Displacement type fluid machine
    Patent number: 6352418
    Abstract: A displacement type fluid machine which is easier to machine and assemble than a scroll type fluid machine and has high performance and low cost. A displacer is revolved in a cylinder having an inside wall formed by a curve such that a planar shape is continuous, whereby a working fluid is discharged through a plurality of discharge ports, there is provided a driving unit in which the orbiting radius of the displacer is variable along the shape of a movement line contact portion of the cylinder and the displacer.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: March 5, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Hirokatsu Kohsokabe, Kunihiko Takao, Masahiro Takebayashi, Isao Hayase, Hiroaki Hata, Shigetaroo Tagawa, Kenji Tojo, Takeshi Kouno