Patent ID: 7721854

Claim:
A brake mechanism for a wheel of a vehicle, comprising: a rotor fixed to and rotatable with the wheel about an axle axis; a caliper structure spanning the rotor; inboard and outboard friction members supported by the caliper structure, one to either side of the rotor, for selectively engaging the rotor and braking the wheel; a fluidic cylinder supported by the caliper structure and having (i) a piston fixed to the inboard friction member and configured to move the inboard friction member toward the rotor upon receipt of fluidic pressure, and (ii) a piston seal configured to urge the inboard friction member away from the rotor upon removal of fluidic pressure from the cylinder; an anchor bracket structure fixed to the vehicle; a guide pin fixed to one of the anchor bracket structure and the caliper structure; a bore structure having an interior bore surface that defines a guide pin bore, the bore structure being fixed in relation to the other of the anchor bracket structure and the caliper structure, and the guide pin bore being configured to receive the guide pin therein; and a resilient bushing interposed between the guide pin and the interior bore surface, wherein the guide pin is movable in relation to the anchor bracket structure between a first relative position and a second relative position, wherein, when the guide pin is located in the first relative position, the resilient bushing is positioned in contact with the one of the anchor bracket structure and the caliper structure, wherein, when the guide pin is located in the second relative position, the resilient bushing is spaced apart from the one of the anchor bracket structure and the caliper structure, and wherein the resilient bushing biases the guide pin toward the first relative position.