| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a valve mechanism for reducing the risk of the damage of an annular protruding part made of an elastic material. SOLUTION: A valve mechanism comprises a valve seat 24, an annular part 7a, a valve element 23 which is provided slidingly in the annular part 7a, forms a space part 30 between the valve seat 24 and it and interrupts the communication between a communicating hole 7b communicating with a brake fluid supply chamber 15 and the space part 30 by seating it on the valve seat 24, an annular protruding part 233a and a communication passage 7c which is shielded by the valve element 23 when the valve element 23 abuts on the valve seat 24 and whose shield by the valve element 23 is cancelled by separating the valve element 23 from the valve seat 24.</p> |
