Dual-mode drum brake having parking lever pivotable about an axi

Details Dual-mode drum brake having parking lever pivotable about an axi Dual-mode drum brake having parking lever pivotable about an axi

1997-06-27

2000-04-04

Graham, Matthew C.

Brakes

Operators

Multiple

188106A, F16D 5146, F16D 6524

Patent

active

060449381

ABSTRACT:
A dual-mode drum brake assembly including a stationary backing plate opposed to a brake drum, a wheel cylinder disposed on the backing plate and having a pair of outwardly extendible pistons, an anchor fixed to the backing plate and opposite to said wheel cylinder diametrically of the backing plate, two brake shoes movably supported by the backing plate and having a first pair of adjacent ends opposite to the wheel cylinder and a second pair of adjacent ends opposite to the anchor, a parking lever disposed substantially along one of the two brake shoes and having a pivot axis perpendicular to the backing plate, at a portion thereof closer to the wheel cylinder, and a cable fixing portion closer to the anchor, and a link mechanism disposed between the parking lever and the brake shoes, and operating to move the adjacent ends of the second pair of the brake shoes away from each other, with a pivotal movement of the parking lever about the pivot axis when a torque acts on the brake drum.

REFERENCES:
patent: 2144025 (1939-01-01), Brie
patent: 2281150 (1942-04-01), Goepfrich
patent: 3706360 (1972-12-01), Nyundya
patent: 4974708 (1990-12-01), Maligne
patent: 5002159 (1991-03-01), Brix et al.
patent: 5062504 (1991-11-01), Yamamoto
patent: 5070968 (1991-12-01), Evans
patent: 5275260 (1994-01-01), Evans et al.

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