Abstract: A master cylinder having a body with a bore therein delimited by a piston into a work chamber and a supply chamber. The work chamber (16) is connected to wheel brakes, while the supply chamber is connected to a fluid supply, through a supply duct. The piston has a shank retained by a guide ring mounted in the bore and a head bears against a thrust ring in a rest position. A first end of the supply duct is connected to the fluid supply, while a end is connected to the supply chamber. A hydraulic damping arrangement that dampens movement of the piston toward the thrust ring and includes structure for shutting off the second end of the supply duct such that brake fluid flows at a reduced flow rate from the supply chamber to the supply duct through at least one exhaust duct.

Abstract: A master cylinder comprising a body of longitudinal axis (X) pierced with a bore of axis (X) for receiving a piston (10). The piston (10) comprising a piston head (32) and a piston shank (34) connected to the piston head (32) via a shoulder (36). The piston shank (34) is guided by a guide ring (38) mounted fixedly in the piston body with the piston head (32) coming at rest to bear against a thrust ring (42) via the shoulder (36) in the bore. The piston (10) delimits a work chamber (16) within the bore that is in communication with a supply chamber (14) containing brake fluid in a rest position and with the brakes by way of a valve device (18) arranged in the body of the piston (10) during a brake application.