Ricoh Company, Ltd.

Tohoku Ricoh Co., Ltd.

Yuzuru Kudo

Yoshihiro Takahashi

Yukio Itami

Mitsuo Suzuki

Kunio Ikeda

Takao Abe

Kiyoshi Shibuya

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.

Dynamic pressure pneumatic bearing device and manufacturing method

Growing community of inventors

Atsugi, Japan

Yuzuru Kudo