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Title:
NEGATIVE-PRESSURE-TYPE BOOSTER
Document Type and Number:
WIPO Patent Application WO/2019/188144
Kind Code:
A1
Abstract:
A negative-pressure-type booster 100 is provided with an annular seal member 170 that is interposed between an inner peripheral surface 112c of a tube part 112a provided to a booster shell 110 and an outer peripheral surface 131b of a valve body 130, and that blocks communication between a pressure-changing chamber and the atmosphere. The seal member 170 has a tubular base part 171, a seal part 172 that is provided to an inner peripheral surface 171a of the base part 171 and that slides against the outer peripheral surface 131b to block communication between a pressure-changing chamber R2 and the atmosphere, a circumferential recess 174 that is provided to an outer peripheral surface 171b of the base part 171 and that allows the seal part 172 to be displaced in a radial direction while the seal part 172 is sliding against the outer peripheral surface 131b, and a circumferential contact part 175 that is provided to the outer peripheral surface 171b of the base part 171 and that presses against the inner peripheral surface 112c.

Inventors:
ISHIKAWA, Kenta (2-1, Showa-cho, Kariya-sh, Aichi 88, 〒4488688, JP)
Application Number:
JP2019/009472
Publication Date:
October 03, 2019
Filing Date:
March 08, 2019
Export Citation:
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Assignee:
ADVICS CO., LTD. (2-1 Showa-cho, Kariya-shi Aichi, 88, 〒4488688, JP)
International Classes:
B60T13/52; F16J15/16; F16J15/24; F16J15/3204
Domestic Patent References:
WO2011050925A12011-05-05
Foreign References:
JP2008247376A2008-10-16
JP2006076327A2006-03-23
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