Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1985-06-20
1987-02-24
Butler, Douglas C.
Brakes
Wheel
Axially movable brake element or housing therefor
188 724, 188170, 192 91R, F16D 5522
Patent
active
046450394
ABSTRACT:
A parking brake assembly for large off-highway vehicles and comprising a housing adapted to be installed around the rotatable drive shaft of a wheel motor, a plurality of clutch plates disposed within the housing and engaged with the drive shaft for rotation or non-rotation simultaneously therewith, a piston assembly reciprocally disposed within the housing and having a normal position of pressure engagement with the clutch plate whereby the brake assembly is normally in a braking engagement with the drive shaft, an annular chamber is provided in the housing and in communication with the piston for receiving a pressure fluid therein and exhausting the pressure fluid therefrom, the application of a pressure fluid into the chamber causing the piston to move into a non-braking pressure position with respect to the clutch plates and the release of fluid pressure from the chamber permitting the piston to return to the braking pressure engagement with the clutch plates.
REFERENCES:
patent: 2775319 (1956-12-01), Friedman
patent: 3831718 (1974-08-01), Muller et al.
patent: 3893556 (1975-07-01), Lech, Jr.
patent: 4014414 (1977-03-01), Yamamoto et al.
patent: 4078637 (1978-03-01), Hanks
patent: 4128145 (1978-12-01), Euler
patent: 4129204 (1978-12-01), Hedgcock
Lewis Billy M.
Myers Walter I.
Butler Douglas C.
Wiseda Ltd.
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