Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Patent
1993-01-13
1994-11-08
Stodola, Daniel P.
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
212152, B66D 148, B66C 1318
Patent
active
053620291
ABSTRACT:
A limit device for preventing travel of a hoist lift rope load above a predetermined height. The limit device includes an actuator mounted at a reference position adjacent the hoist lifting rope as it is raised and lowered by a prime mover. A switch is connected in a control circuit for the prime mover to place the prime mover in either a raise-lower mode or a raise-prevent mode. A switch actuating mechanism is connected between the actuator and the switch and is operatively connected to maintain the prime mover in its raise-lower mode when the actuator is in its reference position. A follower is mounted at any desired fixed position on the lift rope for travel therewith. Lifting of a load above a predetermined height will result in the follower contacting the actuator to move it from its reference position and cause the switch to place the prime mover in its raise-prevent mode and stop further lifting of the load.
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Harnischfeger Corporation
Mansen Michael R.
Stodola Daniel P.
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