Patent ID: 6997290

Claim:
In a disc brake assembly having a disc and a brake shoe movable towards and away from a friction surface provided on one face of the disc, a parking brake comprising a first pushing member for moving the brake shoe towards and away from the friction surface of the disc, a first movement transmitting member displaceable between a first position wherein said first movement transmitting member forces said first pushing member against a biasing force acting thereon to maintain the brake shoe in friction engagement with the disc and a second position wherein said first pushing member is free to move in a direction away from the disc to release the brake shoe from the friction surface of the disc, and a motive means to displace said first movement transmitting member between said first and second positions thereof, wherein said first movement transmitting member includes a first cam having a cam surface engaged with a free distal end of said first pushing member, wherein said motive means includes a piston and cylinder arrangement and wherein said first cam is pivoted at one end thereof to said piston and cylinder arrangement and at a second opposite end thereof to a fixed support structure, and further comprising a second cam and a second pushing member, said piston and cylinder arrangement being connected at one end thereof opposite said first cam to said second cam to displace said second cam to a first position thereof in order to force said second pushing member against a biasing force acting thereon to maintain the brake shoe in frictional engagement with the disc.