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Title:
DYNAMIC PRESSURE PNEUMATIC BEARING, ROTATING DEVICE, OPTICAL SCANNER, AND IMAGE FORMING DEVICE
Document Type and Number:
Japanese Patent JP2004332784
Kind Code:
A
Abstract:

To provide a dynamic pressure pneumatic bearing capable of restricting rotation thereof around the center of gravity due to residual unbalance as much as possible to reduce loss without increasing the whole length of the dynamic pressure pneumatic bearing.

This dynamic pressure pneumatic bearing 1, in which a fixed shaft 2 and a rotary sleeve 5 are fitted to each other through a fine clearance, is formed of a spiral groove-patterned part 3 for generating an air flow in the axial direction in the fine clearance with rotation of the fixed shaft 2 or the rotary sleeve 5 and a strip-shaped non-groove-patterned part 4 formed in both ends to pinch the groove-patterned part 3.


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Inventors:
ITAMI YUKIO
Application Number:
JP2003126725A
Publication Date:
November 25, 2004
Filing Date:
May 01, 2003
Export Citation:
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Assignee:
RICOH KK
International Classes:
G02B26/12; F16C17/02; F16C32/04; F16C33/24; G02B26/10; (IPC1-7): F16C17/02; F16C32/04; F16C33/24; G02B26/10