Wedge actuated drum brake assembly

Details Wedge actuated drum brake assembly Wedge actuated drum brake assembly

1982-02-05

1985-05-28

Reger, Duane A.

Brakes

Wheel

Transversely movable

188364, 74110, F16D 5162

Patent

active

045194823

ABSTRACT:
A wedge actuated drum brake assembly uses a wedge-shaped actuating rod and a roller cage slidably mounted thereon to transmit actuating forces from a fluid pressure actuator to a pair of friction elements. The actuating rod and roller cage are provided with a compression spring between the rod and the roller cage and an extension spring between the roller cage and the housing within which the actuating rod and roller cage are movably mounted. The extension spring opposes the compression spring during initial movement of the actuating rod to thereby cancel the spring forces acting on the cage. A flexible boot interconnects the rod and the wall of the housing and includes a bead that is clamped with the end coil of the extension spring between a shoulder on the housing and a portion of the fluid pressure actuator that extends into the housing.

REFERENCES:
patent: 4018313 (1977-04-01), Hart et al.

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