US 5,433,299 A · Disc brake

Abstract

A disc brake assembly has a pair of pivoted brake arms carrying brake pads located on respective opposite sides of a disc. The brake arms are biased towards each other by springs to clamp the brake pads against the disc. The disc brake assembly also includes a cam member having two double-sided cams, each of which co-acts with a cam follower mounted on a respective brake arm. The cam member is connected to an actuating cylinder. When the cylinder is energized, the inner cam surfaces drive the cam followers apart to release the brake. When the cylinder is not energized, the outer cam surfaces prevent outward movement of the cam followers thereby positively locking the brake pads against the disc. The disc brake also includes a mechanism for automatically adjusting the position of the brake pads to compensate for wear.

Claims13

Dependent claims

A disc brake assembly comprising

a pair of brake arms, each pivotally mounted at one end and adapted to receive a portion of a brake disc therebetween;
a respective brake element mounted to each brake arm;
biasing means for resiliently biasing the brake arms towards each other to urge the brake elements into contact with respective opposite sides of the disc;
a cam member defining a pair of cam formations;
a cam follower mounted on each brake arm, each cam follower being operatively associated with a respective one of the cam formations;
actuating means for moving the cam member;
characterised in that each cam formation includes first and second cam surfaces, and wherein in use the cam followers are displaced apart by the respective first cam surfaces during motion of the cam member in one direction to thereby release the brake elements from the brake disc, and the brake elements are positively locked into contact with the brake disc by the abutment of the second cam surfaces against the respective cam followers when the cam member is moved in the opposite direction.

4 more elements

Dependencies are inferred from the claim text.

Disc brake

Life of this patent

Disc brake

Life of this patent

Abstract

Claims13