Patents by Inventor Jun-ichi Sunaga

Jun-ichi Sunaga 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 machinery, a flange for fluid machinery, and a method for manufacturing them
    Patent number: 6390773
    Abstract: An annular flange member is provided which is adapted to be provided around a fluid passage opening of a housing of a hydraulic machine to connect a fluid conduit means to the fluid passage opening. The annular flange member comprises an inside surface facing the housing, an outside surface opposite the inside surface, and a through hole extending from the inside surface to the outside surface and fluidly communicated with the fluid passage opening. The outside surface is provided with an O-ring receiving groove surrounding the through hole which is formed by a half die cutting press operation. A hydraulic machine is provided which includes a flange member as noted above.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: May 21, 2002
    Assignee: Ebara Corporation
    Inventors: Kenichi Kajiwara, Akihiro Ohsaki, Jun-ichi Sunaga