| 摘要 |
<p>PROBLEM TO BE SOLVED: To completely prevent a path machining assisting hole which is sealed after completion from being formed in a working fluid feeding path formed by passing through a cap of a cylinder housing. SOLUTION: A master cylinder MC is structured so that a cylinder housing 31 is formed with a body main body 32 and a cap 33, a first and a second pistons 4 and guided by a sleeve 34 and a piston guide 33a fitted into the cylinder housing 31 are installed slidably, and a first pressure chamber 9 and a second pressure chamber 10 are partitioned in it. In order to feed working fluid from an external working fluid feed source 28 to the first pressure chamber 9 through a fluid feed path formed in a piston guide 33a, a fluid feed path 35 passing the cap 33 is provided with an assisting hole which has been sealed after completion fir machining a through hole is never formed.</p> |
