Mobile shovel excavator

Details Mobile shovel excavator Mobile shovel excavator

1981-05-26

1983-03-29

Spar, Robert J.

Material or article handling

Vertically swinging load support

Shovel or fork type

414687, E02F 332

Patent

active

043781934

ABSTRACT:
A mobile shovel excavator having a superstructure rotatable about a vertical axis on an undercarriage wherein the arc circumscribed by the rotating superstructure projects beyond the undercarriage, and a stump jib pivotable on the superstructure about a vertical pivot axis by means of a hydraulic cylinder is provided; an excavator jib is attached to the distal end of the stump jib, and the excavator jib is pivotable about the stump jib; in use, the stump jib may be pivoted so that the outer end thereof is either inside or outside of the arc circumscribed by this superstructure, thus varying the pivot point of the excavator jib, and when the excavator is not in use, both the stump jib and the excavator jib are entirely positioned within the arc circumscribed by the rotatable superstructure.

REFERENCES:
patent: 3099358 (1963-07-01), Clark
patent: 3250410 (1966-05-01), Dorkins
patent: 3669286 (1972-06-01), Gauchet
patent: 3703973 (1972-11-01), Nilsson
patent: 3712490 (1973-01-01), Schaeff
patent: 3717269 (1973-02-01), Schaeff
patent: 4049139 (1977-09-01), Stedman

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