Patent ID: 7374026

Claim:
A parking brake assembly for a disc brake, the parking brake assembly comprising: an operating shaft including an operating shaft lever for amplifying a force supplied to a radially outer end of the operating shaft lever by a service brake actuator and transmitting the force to brake pads, wherein the operating shaft is pivotable about an axis at a radially inner end of the operating shaft lever between a rest position at which a braking force is not applied and an actuated position at which the braking force is applied, and the operating shaft includes an abutment surface; and a complementary latch, wherein the abutment surface is selectively engageable by the complementary latch to retain the operating shaft in the actuated position and thereby apply a parking brake, wherein the abutment surface has a helical configuration centered on the axis of the operating shaft, and wherein the complementary latch is linearly moveable between an engaged position and a disengaged position.