Patents by Inventor Yuzuru Kudo

Yuzuru Kudo 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).

  • Dynamic pressure pneumatic bearing device and manufacturing method thereof
    Patent number: 5769544
    Abstract: A dynamic pressure pneumatic bearing device has a groove for generating a dynamic pressure and formed on an inner circumferential face of a rotating shaft or an outer circumferential face of a fixed shaft; each of these shafts being formed by an aluminum alloy; and a wear resisting film formed on each of the inner circumferential face and the outer circumferential face. Another dynamic pressure pneumatic bearing device is constructed by a rotating shaft having a cylindrical hollow and a fixed shaft inserted into this hollow. The fixed shaft has a bearing face opposed to an inner circumferential face of the rotating shaft and separated from this inner circumferential face with a predetermined clearance. Herringbone grooves for generating a dynamic pressure and recessed portions having the same depth as the herringbone grooves are formed on the bearing face.
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: June 23, 1998
    Assignees: Ricoh Company, Ltd., Tohoku Ricoh Co., Ltd.
    Inventors: Mitsuo Suzuki, Yukio Itami, Kunio Ikeda, Yuzuru Kudo, Takao Abe, Yoshihiro Takahashi, Kiyoshi Shibuya