Abstract: A master cylinder includes a restraining device arranged between the first and second pistons for preventing the return spring from being compressed and expanded beyond a certain extent. The restraining device includes a first, substantially sleeve-shaped component and a second, substantially pin-shaped component. The pin-shaped component includes a flange which projects radially outwards. The sleeve-shaped component includes a first receiving flange which positively interacts with the flange of the pin-shaped component. The sleeve-shaped component includes at least one introduction opening which enables the flange on the pin-shaped component to be laterally introduced into the sleeve-shaped component. The end of the sleeve-shaped component includes a second receiving flange which positively interacts with a flanged projection on the second piston which projects radially outwards.

Abstract: A master cylinder (10) for a hydraulic vehicle braking system has a housing (12) with a bore (14) formed therein, in which bore a first piston (24) and a second piston (26), which is arranged at an axial distance from the first piston, are guided in a sealing and displaceable manner. A restraining device (40) for a return spring (38) of the first piston (24) is arranged between the first piston (24) and the second piston (26), which device prevents the return spring (38) from being compressed and expanded beyond a certain extent. In order to simplify the structure and assembly of the restraining device (40), the latter consists of a first, substantially sleeve-shaped component (42) and a second, substantially pin-shaped component (44) which is connected to the first component such that it can be disengaged and which comprises at its end which faces the sleeve-shaped component (42) a flange (46) which projects radially outwards.

Abstract: A master cylinder (10) for a hydraulic vehicle braking system comprises a housing (12) which has a bore (14) extending along a longitudinal axis (A), whose one end is closed by an end wall associated with the housing (12) of the master cylinder (10) and whose other opposite end is sealingly closed by a closure element (16). In the bore (14) adjacent to the closure element (16) a piston (18) is accommodated sealingly and axially movable which can be actuated through same, which has a central valve (20) which enables a fluid connection between a fluid reservoir and a pressure chamber (28) which is defined in the bore (14) by the end wall and the piston (18). When the piston (18) is not actuated, the central valve (20) is held in the open position by means of an abutment member (transverse pin 34) acting on the closure element (16).

Abstract: A sliding caliper disc brake comprises a caliper member adapted to straddle a minor portion of the periphery of a rotatable disc, a carrier member for fixing to a vehicle, guide means guiding the caliper member for sliding relative to the carrier member, and an actuator for directly urging a friction pad onto one side of the disc to cause the caliper member to slide relative to the carrier member to apply by reaction an opposite friction pad to the other side of the disc. The guide means includes a pair of pins connected to one of the members and slidable within respective openings in receiving means connected to the other of the two members. In order to locate the caliper member against undue movement about either of the two pins, each pin is a snug sliding fit within the respective opening. Furthermore, at least one of the pins or receiving means is connected to the associated member by a resilient element adapted to flex so as to limit forces transmitted between the pins and receiving means.

Abstract: A fluid pressure operated vehicle braking system includes a control valve assembly comprising an inlet and outlet, a normally-open valve having a valve member movable in response to a predetermined inlet pressure to control the flow of pressure fluid between the inlet and the outlet, and a stepped piston subjected to a biasing force dependent upon the vehicle loading and operable in response to both the inlet pressure and the biasing force to reduce the outlet pressure after the predetermined inlet pressure is attained.