Hydraulic clutching and braking system for starting and stopping

Details Hydraulic clutching and braking system for starting and stopping Hydraulic clutching and braking system for starting and stopping

1981-09-28

1984-05-08

Wilhite, Billy J.

Presses

Methods

100282, 192 12C, 192 18A, B30B 1510, B30B 1512

Patent

active

044467850

ABSTRACT:
A clutch and brake system for starting and stopping a power press uses hydraulically actuated brake and clutch mechanisms. To start the press, the brake is hydraulically released while the clutch is hydraulically engaged at a predetermined intermediate torque level which is less than the full clutch torque level. The clutch is maintained at that intermediate torque level until the present drive shaft has attained its substantially full speed, and is then increased to the full clutch torque level. To stop the press, the clutch is hydraulically disengaged while the brake is hydraulically engaged at a predetermined intermediate torque level which is less than the full brake torque level. The brake is maintained at this intermediate torque level until the press drive shaft has substantially stopped, at which time the brake torque is increased to the full brake torque level.

REFERENCES:
patent: 2436968 (1948-03-01), Longfield
patent: 2577641 (1951-12-01), Wissman
patent: 2838150 (1958-06-01), Eason
patent: 3580371 (1971-05-01), Kron

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