Master cylinder piston and device for mounting a check valve therein

摘要

A master cylinder piston for use in a motor vehicle having a flap ( 22 ) that is biased towards a position to shut off a pressure-fluid passage ( 24 ) by a return spring ( 28 ) resting on a cage ( 30 ). A flange ( 38 ) on a cage ( 30 )for the Spring ( 28 ) is located in an annular groove ( 44 ) provided in the housing ( 20 ) for the flap ( 22 ) when the cage ( 30 ) bears axially on an inner shoulder ( 64 ) of the housing ( 20 ).