| 摘要 |
A master cylinder ( 1 ) having a bore ( 3 ) fitted with at least one piston ( 4, 5 ) and at least one seal ( 19, 20, 21, 22 ). The seal ( 19, 20, 21, 22 ) is partially stiffened by a reinforcement member ( 25 ). In order to retain the piston ( 4,5 ) in the bore ( 3 ) a groove ( 31 ) is located on a circumference of the piston ( 4,5 ) against which the sealing member ( 25 ) bears with the piston ( 4,5 ) in a rest position to retain the piston ( 4,5 ) in bore ( 3 ).
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