Winch and winch drum

Details Winch and winch drum Winch and winch drum

2007-06-05

2007-06-05

Marcelo, Emmanuel (Department: 3654)

Implements or apparatus for applying pushing or pulling force

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

Device includes rotatably driven, cable contacting drum

C254S266000, C254S278000, C242S613200

Reexamination Certificate

active

11113458

ABSTRACT:
Disclosed is a winch drum for rotation about a rotation axis. The winch drum has a rope-receiving surface with a plurality of raised ridges defining substantially helical channels between them. The channels provide guidance for rope along the rope-receiving surface at least during rope release. The ridges have a meandering shape extending around the drum, formed from a series of alternating circumferential and axially inclined ridge elements.

REFERENCES:
patent: 23499 (1859-04-01), Reed
patent: 756851 (1904-04-01), Hartweg
patent: 4274606 (1981-06-01), Bernwall et al.
patent: 4688765 (1987-08-01), Guangorena
patent: 5593140 (1997-01-01), van Beers
patent: 5829736 (1998-11-01), Harken
patent: 5947451 (1999-09-01), Cavanagh
patent: 6019353 (2000-02-01), Atfield
patent: 6435480 (2002-08-01), Allen

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