Title:
MASTER CYLINDER
Document Type and Number:
Japanese Patent JP2015193352
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a master cylinder capable of improving supply performance of a brake fluid.SOLUTION: A piston seal 45 disposed in a peripheral groove 32 comprises: an annular base part 101; an inner peripheral lip part 102 projecting from an inner peripheral side of the base part 101; an outer peripheral lip part 103 projecting from an outer peripheral side of the base part 101; and an intermediate projecting part 104 projecting from a space between the inner peripheral lip part 102 and the outer peripheral lip part 103 of the base part 101. On a wall face 89A on a supply path 48 side of the peripheral groove 32, a step part 93 which becomes hollow with respect to a face part 89a on a bottom face 88A side is formed on an opening side of the peripheral groove 32. The step part 93 extends into a range of thickness in a radial direction of the intermediate projecting part 104 of the piston seal 45, and is formed into an annular shape.
Inventors:
OWADA HIROSHI
Application Number:
JP2014073244A
Publication Date:
November 05, 2015
Filing Date:
March 31, 2014
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD
International Classes:
B60T11/228; F16J15/18; F16J15/32
Domestic Patent References:
| JP2012210905A | 2012-11-01 | |||
| JP2012210905A | 2012-11-01 | |||
| JP2013203121A | 2013-10-07 | |||
| JP2013203121A | 2013-10-07 |
Attorney, Agent or Firm:
Masatake Shiga