Title:
MASTER CYLINDER
Document Type and Number:
WIPO Patent Application WO/2019/044115
Kind Code:
A1
Abstract:
A seal member (45) has: a base (101) which is capable of coming into contact with the cylinder opening-side circumferential wall (89) of a circumferential groove (32); an inner circumferential lip (102) extending toward the cylinder bottom side from the base (101) and in sliding contact with the outer periphery of a piston (18); and an outer circumferential lip (103) extending toward the cylinder bottom side from the base (101) and in contact with the groove bottom (88) of the circumferential groove (32). The circumferential groove (32) has a sloped section (91) which slopes and extends from the cylinder bottom-side end of the groove bottom (88) so that the sloped section (91) comes closer to the cylinder bottom side as the sloped section (91) extends radially inward. A cylinder body (15) has formed therein a groove (51) which is open to the sloped section (91) and which extends from the circumferential groove (32) toward the cylinder bottom side.
Inventors:
SAKAMOTO KAZUAKI (JP)
KASAI SHINYA (JP)
KONO HIROTAKA (JP)
MASAKI KEN (JP)
KOSHIMIZU NAGANORI (JP)
TACHIKAWA SHUN (JP)
KASAI SHINYA (JP)
KONO HIROTAKA (JP)
MASAKI KEN (JP)
KOSHIMIZU NAGANORI (JP)
TACHIKAWA SHUN (JP)
Application Number:
PCT/JP2018/022581
Publication Date:
March 07, 2019
Filing Date:
June 13, 2018
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
B60T11/16; F16J15/18; F16J15/3232; F16J15/3236
Foreign References:
| JP2013226979A | 2013-11-07 | |||
| JP2011136602A | 2011-07-14 | |||
| JP2001130398A | 2001-05-15 | |||
| US20150298673A1 | 2015-10-22 |
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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