BRAKE ACTUATOR HAVING A DAMPING STONE SHIELD

摘要

A brake actuator having a stone shield (82) located within the brake actuator housing and surrounding the brake actuator piston (30) which dampens the impact of the brake actuator piston (30) against the end wall opening (34) an opening which receives the reciprocal piston (30) of the brake actuator and an integral radial flange (86) which overlies the inner surface of the brake actuator end wall opening (34). The annular body portion (84) of the stone shield includes a first end portion (90) extending at least partially through the brake actuator end wall opening (34) having an annular groove (96) surrounding the piston (30) and damping the impact of the piston (30) against the end wall opening (34). In the preferred embodiment, the annular groove (96) extends through the first end portion (90) of the stone shield and is bell-shaped or tapered in cross-section having a rounded end surface.