Coupling assembly

Details Coupling assembly Coupling assembly

1992-10-19

1993-11-02

Braun, Leslie A.

192 clutches and power-stop control

Clutch and brake

Sliding operation

192 12C, 192 85A, F16D 6704

Patent

active

052576841

ABSTRACT:
An improved coupling assembly includes a combined clutch and brake assembly. Springs are provided to urge the brake assembly to an engaged condition. A first pressure chamber holds fluid pressure to assist the springs in urging the brake assembly toward the engaged condition. A second chamber holds fluid pressure to urge the clutch assembly toward the engaged condition and to urge the brake assembly away from the engaged condition. Fluid is supplied at a relatively low pressure through the first chamber to provide for a controlled actuation of the brake assembly to the engaged condition under the combined influence of the springs and the pressure in the first chamber and to provide for the transmission of a controlled amount of braking torque when the brake assembly is engaged. Fluid is supplied to the second chamber at a higher pressure to overcome the influence of the springs and operate the clutch assembly to the engaged condition. A quick release valve arrangement is provided in association with the second chamber to enable the fluid pressure to be quickly exhausted from the second chamber and the brake assembly engaged.

REFERENCES:
patent: 4194606 (1980-03-01), Beneke
patent: 4463841 (1984-08-01), Kelley
patent: 4567965 (1986-02-01), Woodruff
patent: 4567971 (1986-02-01), Hille et al.
patent: 4648494 (1987-03-01), Yater
patent: 4676351 (1987-06-01), Miles et al.
patent: 4785926 (1988-11-01), Matson
patent: 4807731 (1989-02-01), Collins
patent: 4848527 (1989-07-01), Kamio
patent: 4874068 (1989-10-01), Collins et al.
patent: 4967885 (1990-11-01), Arbjerg et al.
patent: 5046593 (1991-09-01), Collins et al.

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