Hold-down device for a drum brake

Details Hold-down device for a drum brake Hold-down device for a drum brake

1975-06-06

1976-05-25

Blix, Trygve M.

Brakes

Wheel

Transversely movable

29407, F16D 6508

Patent

active

039586740

ABSTRACT:
A drum brake is disclosed in which a pair of arcuate brake shoes are slidably mounted on a fixed support and which are thrust into braking engagement with a rotating drum by a fluid motor actuator. Resilient hold-down springs are provided to attach the brake shoes to the drum and consist of an anchor portion which is engaged with the fixed support and a linking portion which interconnects the anchor portion and the brake shoe. A detent is provided on the web of the brake shoe in a position such that, when the brake shoe is installed on the fixed support with the detent projecting away from the fixed support, the linking portion of the hold-down spring will engage the detent and cannot be connected to the anchor portion. In this way, the shoes must be installed correctly with the projections facing towards the fixed support in order to connect the portions of the hold-down springs, thereby preventing incorrect assembly of the brake.

REFERENCES:
patent: 1875029 (1932-08-01), La Brie
patent: 1908459 (1933-05-01), Thomas
patent: 2666504 (1954-01-01), Berno et al.
patent: 3294201 (1966-12-01), Swift
patent: 3308909 (1967-03-01), Johannesen
patent: 3517779 (1970-06-01), Bolenbaugh
patent: 3606666 (1971-09-01), Briggs

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