| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To ensure both of the good guiding performance of a secondary piston, and good degassing performance when filling hydraulic fluid, in a plunger type tandem master cylinder. <P>SOLUTION: A piston guide portion 7A is provided behind a pressure cup sealing an outer periphery of the secondary piston, and communicating grooves 23, 24 communicating a sea groove 12A to a first pressure chamber 3<SB>-1</SB>behind the secondary piston are provided in the piston guide portion 7A. The communicating grooves 23, 24 are respectively provided at a first installing point close to an outlet hole 8<SB>-1</SB>of the first pressure chamber provided so as to be partial to either one of right or left sides from an upper part center of the first pressure chamber 3<SB>-1</SB>, and a lower part center portion of the first pressure chamber 3<SB>-1</SB>. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
