Patent ID: 6935469

Claim:
A master cylinder for a braking system comprising a body ( 52 ) pierced with a bore ( 54 ) in which there is mounted to slide at least one piston ( 56 ) connected by a ball-joint connection to an actuating rod connected to a brake pedal, said piston ( 56 ) delimiting a supply chamber ( 58 ) connected to a reservoir of brake fluid and a pressure chamber ( 60 ) connected to brakes arranged at the wheel, said pressure and supply chambers ( 58 , 60 ) being in communication at rest and isolated from one another under a braking action, characterized in that said ball-joint connection includes a female element ( 66 ) formed an end of the piston ( 56 ) and the male element formed on an actuating rod ( 2 ), said pressure chamber ( 60 ) being connected under normal operation to a cartridge ( 64 ) for simulating the pedal feel and in degraded operation is connected to the brakes, said ball-joint being characterized in that: pegs ( 30 , 30 ′) mounted in an diametral bore ( 32 ) of an actuating rod ( 2 ) and a spacer element ( 38 ) mounted in an longitudinal bore ( 39 ) of the actuating rod ( 2 ) are in an initial position of minimum separation; and that on insertion in a bore ( 6 ) in female element ( 66 ) a first end ( 14 ) of the actuating rod ( 2 ) comes into contact with the wall of the female element ( 66 ) such that the spacer element ( 38 ) is pushed back inside the longitudinal bore ( 39 ) of the actuating rod ( 2 ) to bring the pegs ( 30 , 30 ′) into a position of maximum separation and spherical ends ( 36 , 36 ′) on said pegs ( 30 , 30 ′) thereafter collaborate with an interior surface ( 18 ) on the female element ( 66 ) to lock the actuating rod ( 2 ) with the female element ( 66 ).