Dragline bucket dump compensator

Details Dragline bucket dump compensator Dragline bucket dump compensator

1997-07-25

1999-11-30

Shackelford, H.

Excavating

Cable-operated

Boom-type

37401, 37399, E02F 358

Patent

active

059920610

ABSTRACT:
A hoisting assembly for use with a dragline bucket that includes a compensator for generally stabilizing the attitude of the bucket. The compensator is operably coupled to the lift, hoist and dump lines. The connector for the lift line(s) defines a fulcrum about which the compensator turns during use. As the tension in the dump line increases relative to the tension of the hoist lines, the compensator turns about the fulcrum to lift the hoist lines and shift the sheave supporting the dump line forward. As the tension in the dump line decreases relative to the tension of the hoist lines, the compensator turns about the fulcrum in the opposite direction to lower the lift lines and shift the sheave supporting the dump line rearward.

REFERENCES:
patent: 2168643 (1939-08-01), Berner
patent: 3247607 (1966-04-01), Page
patent: 3597865 (1971-08-01), Rumfelt
patent: 4791738 (1988-12-01), Briscoe
patent: 4864747 (1989-09-01), Martin et al.
patent: 5428909 (1995-07-01), Immel
patent: 5636460 (1997-06-01), Drezka

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