Hoist system

Details Hoist system Hoist system

2005-08-09

2005-08-09

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

C254S286000, C254S338000, C254S394000

Reexamination Certificate

active

06926259

ABSTRACT:
The invention is a hoist system for use on a drilling rig made of a tubular mast with a front, back, and top side, a splittable block connected to the mast top side, a trolley with a trolley top and bottom side, wherein the trolley's top side is connected to the splittable block and wherein the trolley is removably secured on the mast's front side, a gripper connected to the trolley bottom side for gripping a load, a hoist cable passing through the splittable block and connected on one end to a hoist cable winch, and a hoist cable winch adapted to pull the hoist cable over the mast top side and through the splittable block to move the trolley relative to the tubular mast and lift the load.

REFERENCES:
patent: 3684244 (1972-08-01), Houck
patent: 3717205 (1973-02-01), Wilderman
patent: 3791628 (1974-02-01), Burns et al.
patent: 3917230 (1975-11-01), Barron
patent: 4423994 (1984-01-01), Schefers et al.
patent: 4671365 (1987-06-01), Back
patent: 4867418 (1989-09-01), Daniels
patent: 5351767 (1994-10-01), Stogner et al.
patent: 5894895 (1999-04-01), Welsh
patent: 6595494 (2003-07-01), Roodenburg et al.

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