DISC BRAKE WITH PARKING BRAKE

摘要

A disc brake caliper includes a hydraulically actuated piston, a frictional locking device comprising a pair of apertured locking plates closely surrounding the piston at a point between the caliper bore and the brake shoe, and a cam device which upon actuation biases the locking plates relative the piston so that the piston is frictionally gripped by the apertured locking plates and carried toward the rotor to actuate the brake independently of hydraulic piston actuation. The piston is not gripped until the cam device is actuated so that the frictional locking device automatically compensates for lining wear.