192 clutches and power-stop control – Stop mechanism – Safety device
Patent
1995-03-31
1996-10-01
Lorence, Richard M.
192 clutches and power-stop control
Stop mechanism
Safety device
192129A, 192134, 74615, 100 53, F16P 316
Patent
active
055604668
ABSTRACT:
A safety guard system provided for a machine having a ram which is movable toward and away from a work zone and an actuator which is operable for driving the ram through a ram stroke toward the work zone. The safety guard system includes a safety guard mounted for movement along a guard path between open and closed positions with respect to the work zone. The safety guard is releasably coupled to the ram for movement during the ram stroke from the open to the closed position before completion of the ram stroke, and the safety guard is arranged to decouple from the ram upon either one of reaching the closed position or earlier encountering an obstruction in the guard path. A guard sensor effects a first signal upon the safety guard reaching the closed position, and an object sensor effects a second signal upon decoupling of the safety guard from the ram. A controller is responsive to the first and second signals such that the controller enables completion of the ram stroke upon receiving the first signal, and the controller terminates the ram stroke upon receiving the second signal prior to receiving the first signal.
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Bowling Joseph M.
Folk Kenneth F.
Lorence Richard M.
The Whitaker Corporation
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