Patent ID: 6729444
Filing Date: 2004-05-04
Classification: F16D

Abstract:
A drum-in-hat disc brake assembly having a disc service brake and a drum-in-hat parking and emergency brake, the drum-in-hat disc brake assembly comprising:a backing plate adapted to support a drum brake shoe assembly of the drum-in-hat parking and emergency brake, the backing plate having a centrally located opening and at least two smaller mounting apertures formed therein about the centrally located opening thereof; a drum-in-hat adapter having a centrally located opening and at least two smaller mounting apertures formed therein about the centrally located opening thereof; an axle flange having a centrally located opening and at least four mounting apertures formed therein about the centrally located opening thereof, the axle flange adapted to be secured to an axle tube which in turn is adapted to extend through the centrally located openings of the backing plate, the drum-in-hat adapter and the axle flange; and a caliper bracket adapted to support a disc brake caliper assembly of the disc service brake, the caliper bracket having at least two apertures formed therein; wherein a plurality of fasteners are provided and extend through the respective apertures of the backing plate, the drum-in-hat adapter, the axle flange and the caliper bracket for securing the caliper bracket, drum-in-hat adapter and the backing plate to the axle flange, said plurality of fasteners consisting of only four fasteners, two of the four fasteners extending through the at least two apertures of the caliper bracket and at least partially into two of the at least four mounting apertures of the axle flange to thereby secure the caliper bracket to the axle flange, and the other two of the four fasteners extending through two smaller apertures of the backing plate and the drum-in-hat adapter and at least partially into the remaining two apertures of the axle flange to thereby secure the backing plate and the drum-in-hat adapter to the axle flange.