Hoist having worm safety device

Details Hoist having worm safety device Hoist having worm safety device

1984-03-19

1986-12-02

Levy, Stuart S.

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

254340, 254343, 254351, B66D 148, B66D 114

Patent

active

046259465

ABSTRACT:
A hoist having a worm safety device in which the worm is continuously meshed with a worm wheel coupled to the drum. The worm is accelerated to a speed greater than that of the worm wheel and at a torque sufficient to overcome the frictional contact between the worm and worm wheel when the hoist direction is reversed.

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