OIL INJECTING APPARATUS

WIPO Patent Application WO/2004/081439

A1

An oil injecting apparatus, wherein the opening of an oil container (11) for storing oil (12) is sealed airtight by a cover member (32). A one-sided-bag-shaped fluid dynamic pressure bearing (10) is seated on an O-ring (25) and fixed airtight onto the upper surface of a bearing stand (30). The inside of the oil container (11) is exhausted by a vacuum pump (22) through a suction/exhaust passage including a suction/exhaust through-hole (17) in the state of the tip part of an injecting tube (36) positioned at an exhaust position apart from an oil level, whereby the inside of the one-sided-bag-shaped fluid dynamic pressure bearing (10) is brought into a vacuum state. In this state, a control device drives a moving device to raise the oil container (11) to an injecting position and releases the suction/exhaust passage to the atmosphere. Then, the oil (12) is injected into the one-sided-bag-shaped fluid dynamic pressure bearing (10) through an oil injecting passage including the injecting tube (36).

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YONEYAMA RYOJI (JP)
KINOSHITA SHINJI (JP)
KUMAGAI TORU (JP)
GOTOH HIROMITSU (JP)
OHTA ATSUSHI (JP)

PCT/JP2004/003192

September 23, 2004

March 11, 2004

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SEIKO INSTR INC (JP)
YONEYAMA RYOJI (JP)
KINOSHITA SHINJI (JP)
KUMAGAI TORU (JP)
GOTOH HIROMITSU (JP)
OHTA ATSUSHI (JP)

F16N37/00; (IPC1-7): F16N37/00; F16N7/30

JP2002168394A	2002-06-14
US5601125A	1997-02-11
US5862841A	1999-01-26
JP2003314791A	2003-11-06

Matsushita, Yoshiharu (11-2 Hiroo 1-chom, Shibuya-ku Tokyo, JP)

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