Brake actuator

Details Brake actuator Brake actuator

1988-08-03

1989-12-19

Halvosa, George E. A.

Brakes

Wheel

Transversely movable

188341, 192 75, 192 99B, F16D 5122

Patent

active

048876984

ABSTRACT:
A mechanical brake actuator for a shoe drum brake including a pair of brake shoes carried by a back plate wherein one pair of adjacent ends of the shoes engage an abutment fixed relative to the back plate, comprises an assembly including a pair of pivotally interconnected parts for co-action respectively with the brake shoes, one part being a force-applying lever engaging one shoe and the other part engaging the other shoe and extending therefrom to the lever to form a pivot member pivotally interconnecting the lever and strut, a pair of rollers on the pivot member, an opening in the abutment, and a pair of spaced surfaces on the abutment on opposite sides of the opening, the rollers being in rolling engagement with the spaced surfaces, and the lever and strut being movably disposed in the opening so that force applied the lever in one direction to pivot the lever about the pivot member urges the one shoe into engagement with the drum and urges the strut to displace the other shoe into engagement with the drum.

REFERENCES:
patent: 2006494 (1935-07-01), Bendix et al.
patent: 2252860 (1941-08-01), Porsche
patent: 2469826 (1949-05-01), Irving
patent: 2918147 (1959-12-01), Shaven
patent: 3554330 (1971-01-01), Harrison
patent: 4757882 (1988-07-01), Idesawa

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