Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1994-10-20
1997-02-11
Oberleitner, Robert J.
Brakes
Wheel
Axially movable brake element or housing therefor
188170, 192111A, B60T 832
Patent
active
056011601
ABSTRACT:
A hydraulically actuated brake assembly capable of rendering both a service brake function and a park brake function to a rotatable shaft that passes through a stationary housing. The brake assembly includes a series of wetted rotatable and nonrotatable brake members arranged in a stacked and intermixed relation within the housing and arranged coaxially about the shaft. The brake assembly further includes a service brake piston and a park brake piston for individually or conjointly applying a compressive force against the brake members thereby providing a braking action to the shaft and a park brake piston. The pistons are preferably arranged in axial alignment with each other and coaxially about the shaft. The service brake piston responds to fluid pressure being introduced into, a first fluid receiving cavity. The park brake piston is spring applied and is responsive to the fluid pressure introduced into a second fluid receiving cavity. The brake assembly further includes a brake release mechanism for normally urging the service brake piston into a released position wherein the piston is disposed a fixed distance from the brake members. The brake release mechanism is specifically structured and designed to maintain a fixed clearance between the brake piston and the brake members when the brake piston is in its released position and self-compensates for wear on the braking surfaces of the brake members.
REFERENCES:
patent: 3770085 (1972-01-01), Cottingham
patent: 3974896 (1976-08-01), Rach
patent: 4358000 (1982-11-01), Cumming
patent: 4433758 (1984-02-01), Crossman
patent: 4560034 (1985-12-01), Windish et al.
patent: 4657127 (1987-04-01), Boffelli
patent: 5253737 (1993-10-01), Klaue
Case Corporation
Harbst John W.
Oberleitner Robert J.
Schwartz Chris
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