Brake actuator.

摘要

A fluid pressure-operated brake actuator has a cylinder (2) with a fluid inlet means (5) for the supply of fluid under pressure to the cylinder via a pipe (6) releasably secured by a pipe clamp (7). A seat (14A) is provided in the body in a flow path between the inlet means and the interior of the cylinder and a bleed port (15) is disposed to communicate with the flow path at the side of said seat remote from the cylinder interior. A valve element (9) is normally forced by the clamp member (7) into sealing engagement with the seat (14A) to seal off the bleed port during normal operation, release of the clamp member permitting movement of the element (9) away from the seat to place the cylinder interior in communication with the bleed port.