Servo brake system comprising a decompression piston integrated with the pushrod

摘要

A boosted brake ( 10 ) having a booster ( 12 ) for activating a primary piston ( 54 ) of a master cylinder ( 14 ) by way of a feeler ( 42 ), a reaction disk ( 28 ) and a push rod ( 52 ). The push rod ( 52 ) that is housed a decompression piston ( 62 ) and returned elastically by a spring ( 70 ) to a position of rest has at least two radial branches ( 64 ) in order to provide two boost ratios which differ according to the intensity of the input force.