Dragline including improved boom

Details Dragline including improved boom Dragline including improved boom

1995-02-03

1997-06-10

Melius, Terry Lee

Excavating

Cable-operated

Boom-type

37397, 522238, E02F 348, E02F 350

Patent

active

056364598

ABSTRACT:
A dragline comprising a main housing, a bucket hoist mechanism mounted on the housing, a bucket drag mechanism mounted on the main housing, a moving mechanism for moving the main housing over the ground, a boom having upper and lower ends and a rectangular cross-section, the lower end being connected to the main housing, the upper end having thereon a sheave, the boom having a longitudinal axis and including a center section having top and bottom members parallel to the longitudinal axis, the center section having a neutral axis above the longitudinal axis, structure supporting the boom relative to the main housing, a bucket, a hoist rope extending between the bucket and the bucket hoist mechanism and over the sheave for causing vertical movement of the bucket, and a drag rope extending between the bucket and the bucket drag mechanism for causing horizontal movement of the bucket.

REFERENCES:
patent: 1851346 (1932-03-01), Brown
patent: 2255568 (1941-09-01), Page
patent: 3249238 (1966-05-01), Hedeen
patent: 3516183 (1970-06-01), Serota
patent: 4423560 (1984-01-01), Rivinius et al.
patent: 4769932 (1988-09-01), Kalve
patent: 5362029 (1994-11-01), Kallenberger
patent: 5444913 (1995-08-01), Nytray

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