Fluid pressure and mechanical drum brake actuator

Brakes – Operators – Multiple

Patent

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Details

188106F, 188146BA, 188363, F16D 5104

Patent

active

054840422

ABSTRACT:
The invention is drum brake assembly having a dual brake actuator. A piston-cylinder assembly forms the primary brake actuator, and a lever member, together with the piston-cylinder assembly, forms a composite structure which acts as a secondary brake actuator. The lever member pivots about an axis substantially parallel to the axis of rotation of the drum, and the lever member is contained within the drum brake assembly. The piston-cylinder assembly is operable independent of the composite structure to actuate the brake.

REFERENCES:
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patent: 1743412 (1930-01-01), Waite
patent: 2125266 (1938-08-01), Begg et al.
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patent: 3199639 (1965-08-01), Newton
patent: 3779348 (1973-12-01), Farr
patent: 3811539 (1974-05-01), Farr
patent: 3913710 (1975-10-01), Margetts
patent: 4374554 (1983-02-01), Colpaert
patent: 4503949 (1985-03-01), Carre et al.
patent: 4729457 (1988-03-01), Cousin et al.
patent: 4753325 (1988-06-01), Jaksic

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