Redundant crane reeving apparatus

Details Redundant crane reeving apparatus Redundant crane reeving apparatus

1989-07-03

1991-12-24

Matecki, Katherine

Implements or apparatus for applying pushing or pulling force

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

Device includes rotatably driven, cable contacting drum

254290, B66D 126

Patent

active

050745280

ABSTRACT:
A reeving apparatus for a crane hoist is disclosed as having an overhead frame, a lifting beam positioned below the frame and carrying a plurality of rotatable lifting beam sheaves, and load carrying means suspended from the lifting beam. A plurality of ropes are also provided for supporting the lifting beam and load carrying means with each one of the plurality of ropes being wrapped around at least one of the plurality of lifting beam sheaves. A pair of rotatable drums are mounted on the overhead frame with the first drum being connected to the plurality of ropes for raising and lowering the lifting beam and the second drum also being connected to the plurality of ropes for raising and lowering the lifting beam. Although both drums are connected to the plurality of ropes, they are operable independently of each other to raise and lower the lifting beam in the event of inoperability of either drum. Further, the pair of rotatable drums have normal condition in which both are rotatably operable together to raise and lower the lifting beam.

REFERENCES:
patent: 4094493 (1978-06-01), Poler
patent: 4214664 (1980-07-01), Poler

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