Friction lining wear indicators for shoe-drum brakes

Details Friction lining wear indicators for shoe-drum brakes Friction lining wear indicators for shoe-drum brakes

1982-04-29

1984-03-20

Reger, Duane A.

Brakes

With condition indicator

Electrical

340 52A, F16D 6602

Patent

active

044375476

ABSTRACT:
A friction lining wear indicator for shoe-drum brakes comprising a sensor mounted on a brake shoe, which actuates an indicator when the thickness of a friction lining carried by a platform of the shoe for engagement with a drum is less than a predetermined value. In order to locate the sensor at the most effective position without machining the lining or fastening the sensor permanently to the shoe, the sensor is located by a mounting device located in a depression in an edge of the platform, and co-operates with the shoe to retain the sensor adjacent the lining. The mounting device comprises a plastics plug, or a resilient clip, and the retaining device is releasable. The sensor comprises a wire loop or a pressed insulation-coated metal strip, and may be integral with the mounting device. The sensor and the drum are connected in a circuit with the indicator which is actuated when the sensor touches the drum.

REFERENCES:
patent: 3783979 (1974-01-01), Hess

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