Friction pad assemblies for sliding caliper disc brakes
First Claim
1. A friction pad assembly in combination with a sliding caliper disc brake, the brake comprising a torque member and a caliper member, at least one hydraulic actuator being incorporated in the caliper member, the caliper member being attached to the torque member for sliding movement relative thereto and arranged to act on the friction pad assembly which is located in a recess in the torque member, wherein the friction pad assembly comprises a backing plate, a pad of friction material secured to the backing plate, and a wire spring, a tab of the backing plate being free of friction material and a pin being permanently attached to said tab, the wire spring having a coiled region, the end regions of the spring protruding in two directions from said coiled region, the coiled region being fitted over a shank portion of the pin and a headed portion of the pin retaining the spring on the pin, the whole of the spring and pin being confined to an area that is not swept by the disc of the disc brake under all conditions of pad wear, the end regions of the spring engaging the undersurface of a portion of the caliper member, and the friction pad assembly engaging guides in the torque member so that the spring acts to urge the pad assembly against the guides, and to urge the caliper member away from the pad assembly.
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Accused Products
Abstract
The present specification describes and claims a friction pad assembly for use in a sliding caliper disc brake and a sliding caliper disc brake incorporating such an assembly. The friction pad assembly comprises a backing plate, a pad of friction material secured to the backing plate, and a wire spring attached to the backing plate and extending outwardly in two directions from its point of attachment to the backing plate. When the assembly is incorporated in a sliding caliper disc brake which comprises a torque member and caliper member, the wire spring engages the caliper member both pressing the friction pad assembly down onto guides in the torque member and biasing the torque member and caliper member apart to take up any clearance. Thus the possibility of the assembly rattling in the brake and the torque member and caliper member rattling together, is reduced.
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Citations
9 Claims
- 1. A friction pad assembly in combination with a sliding caliper disc brake, the brake comprising a torque member and a caliper member, at least one hydraulic actuator being incorporated in the caliper member, the caliper member being attached to the torque member for sliding movement relative thereto and arranged to act on the friction pad assembly which is located in a recess in the torque member, wherein the friction pad assembly comprises a backing plate, a pad of friction material secured to the backing plate, and a wire spring, a tab of the backing plate being free of friction material and a pin being permanently attached to said tab, the wire spring having a coiled region, the end regions of the spring protruding in two directions from said coiled region, the coiled region being fitted over a shank portion of the pin and a headed portion of the pin retaining the spring on the pin, the whole of the spring and pin being confined to an area that is not swept by the disc of the disc brake under all conditions of pad wear, the end regions of the spring engaging the undersurface of a portion of the caliper member, and the friction pad assembly engaging guides in the torque member so that the spring acts to urge the pad assembly against the guides, and to urge the caliper member away from the pad assembly.
Specification