Patent ID: 6775980
Filing Date: 2004-08-17
Classification: B60T

Abstract:
A hydraulic master cylinder motor vehicle braking circuit, comprising least one piston (16, 44) that moves axially in a working chamber (18, 52) and is formed within an axial passage (22, 58) for communication between said working chamber (18, 52) and a brake fluid supply chamber (32, 60), and a valve shutter (26, 56) urged by a spring (28, 70) to close said passage when the piston (16, 44) has covered a dead travel in said working chamber (18, 52) starting from a position of rest, characterized by means (80) of concealing the aforesaid dead travel making it possible to reduce the flow of fluid through the aforesaid axial passage (22, 58) to increase the pressure in the working chamber (18, 52) during the dead travel of the piston, said means (80) being borne by the valve shutter (26, 56).