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
1986-05-19
1987-09-15
Petrakes, John
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254357, 254376, 414463, B62D 4304, B66D 106, B66D 534
Patent
active
046934537
ABSTRACT:
A cable winding drum is provided with a ring gear having internal gear teeth and external ratchet teeth, and the drum and gear are supported in a housing for rotation in opposite directions about a drum axis to achieve winding and unwinding of a cable relative to the drum. The drum is rotated in opposite directions by an operating mechanism including a crank actuated crank and pinion assembly, a pawl and a pawl actuating lever. The pinion is supported by the housing and engages the internal gear teeth and, during rotation of the crank in the winding direction, the pinion rotates the drum and the pawl engages the ratchet teeth to preclude rotation of the drum in the unwinding direction. Upon rotation of the crank in the unwinding direction during engagement of the pawl with the ratchet teeth, the cam displaces the pawl actuating lever to release the pawl from engagement with the ratchet teeth to release the drum for rotation in the unwinding direction. Upon subsequent rotation of the crank in the drum winding direction the cam displaces the actuating lever to re-engage the pawl with the ratchet teeth and thus preclude rotation of the drum in the unwinding direction during rotation thereof by the crank in the winding direction.
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Hail III Joseph J.
Petrakes John
Wickes Manufacturing Company
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