Patents by Inventor Chishiro Yamashita

Chishiro Yamashita 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).

  • Vane-type hydraulic motor
    Patent number: 7273360
    Abstract: A vane-type hydraulic motor includes a rotor (30) having a main shaft (70) and a plurality of vanes (35), a cam casing (10) having a chamber (11) for rotatably housing the rotor (30), a first port (13) and a second port (15) for supplying a working fluid into the chamber (11) and discharging the working fluid from the chamber (11). A bypass path (80) is provided for allowing the working fluid to flow from bearing portions (51, 61) supporting the main shaft (70). A drain port (17) is provided for discharging the working fluid to the exterior.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: September 25, 2007
    Assignee: Ebara Corporation
    Inventors: Masao Shinoda, Chishiro Yamashita, Shimpei Miyakawa