Hydraulically operated shovels

Details Hydraulically operated shovels Hydraulically operated shovels

1975-03-06

1976-04-27

Spar, Robert J.

214775, 214DIG10, E02F 332

Patent

active

039528901

ABSTRACT:
A power shovel is described in which the bucket describes a straight line loading movement under power from the luffing rams alone, different straight line movements being obtained by adjustment of the length of the lifting rams which form one side of a deformable quadrilateral. The movements may be level, sloping or vertical. The main arm is shorter than the backet arm so that the loading movements can start close to the chassis of the shovel and the quadrilateral is not deformed into a triangle. A parallelogram linkage for controlling the attitude of the bucket extends from the chassis so that changes in position of the main and bucket arms do not influence the attitude of the bucket.

REFERENCES:
patent: 3522898 (1970-08-01), Rotheisler
patent: 3570691 (1971-03-01), Guinot
patent: 3578188 (1971-05-01), Drieschner
patent: 3606060 (1971-09-01), Feming et al.
patent: 3792786 (1974-02-01), Goikhburg et al.
patent: 3862697 (1975-01-01), Gill et al.

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