Title:
CUP SEAL AND MASTER CYLINDER USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2005/090837
Kind Code:
A1
Abstract:
A liquid pressure is produced in a liquid pressure chamber (11) when a piston (9) is advanced, and the pressure makes an inner lip section (27b) come into tight-contact with the piston (9) and also makes an outer lip section (27c) come into tight-contact with a recess (26) of a bottom wall (26a), and this causes a seal cup to seal the liquid pressure. When the piston (9) retreats, an outer lip section (27c) is bent inward and separated from the bottom wall (26a) of the recess (26). An operation liquid in a reservoir is supplied to the liquid pressure chamber (11) through a first communication path (22), groove (27e), and a gap between the outer lip section (27c) and the bottom wall (26a). The inner lip section (27b) has only a sealing function , the outer lip section (27c) has both sealing function and pumping function, and the supply of a sufficient amount of liquid is secured by the groove.
Inventors:
CHIBA SHUSAKU (JP)
Application Number:
PCT/JP2005/005654
Publication Date:
September 29, 2005
Filing Date:
March 22, 2005
Export Citation:
Assignee:
BOSCH CORP (JP)
CHIBA SHUSAKU (JP)
CHIBA SHUSAKU (JP)
International Classes:
B60T11/16; B60T11/232; B60T11/236; F16J15/16; F16J15/18; F16J15/3236; (IPC1-7): F16J15/18; B60T11/16; F16J15/32
Foreign References:
| JPS53104076A | 1978-09-09 | |||
| JPS58149608U | 1983-10-07 | |||
| JP2003063378A | 2003-03-05 | |||
| JPH0558540U | 1993-08-03 | |||
| JP2003194100A | 2003-07-09 |
Attorney, Agent or Firm:
Aoki, Kenji (Ueno-Suzuki Bldg. 7th Floor 16-3, Ueno
3-Chome, Taito-K, Tokyo 05, JP)
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