Title:
LINEAR ACTUATOR WITH DUSTPROOF MECHANISM
Document Type and Number:
WIPO Patent Application WO/2002/003451
Kind Code:
A1
Abstract:
A linear actuator (1), comprising a box type housing (2), wherein opening parts (27, 28) are formed in the upper surface of the housing along the moving route of projected parts (connection parts) (44b, 44c) of a moving stage (4), the opening parts (27, 28) are closed by dustproof belts (29, 30) disposed inside the housing, rollers (61 to 66) for bypassing the belts (29, 30) on the inside of the housing are installed on the moving stage (4) so that the belts (29, 30) do not interfere with the projected parts of the moving stage, whereby the opening parts (27, 28) can be closed surely by the dustproof belts (29, 30) and the generation of dust from the linear actuator can be prevented surely by taking in air through outside intake ports (7b, 8b) disposed near the opening parts (27, 28) and intake ports (22b, 23b) disposed inside the opening parts.
Inventors:
YANAGISAWA KEN (JP)
Application Number:
PCT/JP2000/004434
Publication Date:
January 10, 2002
Filing Date:
July 03, 2000
Export Citation:
Assignee:
THK MECHANIC RES CO LTD (JP)
YANAGISAWA KEN (JP)
YANAGISAWA KEN (JP)
International Classes:
H02K7/06; B65G17/00; B65G35/06; B65G69/18; F16C29/08; F16H25/24; (IPC1-7): H01L21/68; B65G49/00
Foreign References:
| JPH02145235A | 1990-06-04 | |||
| US5074160A | 1991-12-24 | |||
| JPH01289685A | 1989-11-21 | |||
| US5915916A | 1999-06-29 |
Other References:
See also references of EP 1229578A4
Attorney, Agent or Firm:
Yokozawa, Shiro (Shimadachi Matsumoto-shi Nagano, JP)
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