Title:
NEGATIVE-PRESSURE BOOSTER
Document Type and Number:
WIPO Patent Application WO/2017/131192
Kind Code:
A1
Abstract:
In this negative-pressure booster, one of a negative-pressure valve seat 22d and a negative-pressure valve section 41b1 has, provided thereto, one or more first protruding sections 92 abutting against the other of the negative-pressure valve seat 22d and negative-pressure valve section 41b1, at a site other than a first annular abutment site 91, in an initial state where an operational force has not been applied to an input member 30; and/or one of an atmospheric valve seat 32d and an atmospheric valve section 41b2 has, provided thereto, one or more second protruding sections 94 abutting against the other of the atmospheric valve seat 32d and atmospheric valve section 41b2, at a site other than a second annular abutment site 93, in the initial state where an operational force has not been applied to the input member 30.
Inventors:
SUZUKI KIMIYASU (JP)
Application Number:
PCT/JP2017/003039
Publication Date:
August 03, 2017
Filing Date:
January 27, 2017
Export Citation:
Assignee:
ADVICS CO LTD (JP)
International Classes:
B60T13/57
Foreign References:
| JPH11278246A | 1999-10-12 | |||
| JP2014029214A | 2014-02-13 |
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