Warning device for friction pad in disk brake

Details Warning device for friction pad in disk brake Warning device for friction pad in disk brake

1976-12-21

1978-04-25

Halvosa, George E. A.

Brakes

With condition indicator

Electrical

116114Q, 188218A, F16D 6602

Patent

active

040858243

ABSTRACT:
A warning device for a friction pad in a disk brake of the type which includes a brake disk, and a pair of lined brake shoes which are disposed on the opposite sides of the brake disk and slidable towards the brake disk so as to hold the brake disk therebetween for frictional engagement. This warning device includes a contacting piece which is movable, together with at least one of the shoes, towards one of the side surfaces of the brake disk. A plurality of serrations or projecting portions are provided in part of the surface of the brake disk, which is adjacent to the frictional contacting surface of the brake disk. The projecting portions extend in the radial direction and are arranged in the circumferential direction of the disk. When the friction pads are worn down beyond a predetermined limit, the contacting piece contacts the projecting portions on the brake disk, thereby giving off a clattering noise for warning the driver to get brake service.

REFERENCES:
patent: 3354992 (1967-11-01), Cook et al.
patent: 3972391 (1976-08-01), Penn

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