Excavator with extensible boom

Details Excavator with extensible boom Excavator with extensible boom

1986-01-09

1987-07-07

Eickholt, E. H.

Excavating

Railway graders

Side former

414718, E02F 502

Patent

active

046777725

ABSTRACT:
An excavator comprising a beam pivotally supported at its proximal end to the platform of a mobile support for movement about a horizontal axis, telescopically interengaged upper and lower arms at the distal end of the beam, an excavator pivotally mounted to the distal end of the lower arm and hydraulic cylinders coupling the distal end of the lower arm to the distal end of the beam and the excavator to the distal end of the upper arm. The distal end of the lower arm is structured to mount a backhoe or shovel as may be required for a given operation.

REFERENCES:
patent: 3166205 (1965-01-01), Symmank
patent: 3445015 (1969-05-01), Sampo et al.
patent: 3624785 (1971-11-01), Wilson
patent: 3688930 (1972-09-01), Shumaker
patent: 3871538 (1975-03-01), Miller et al.
patent: 4142308 (1979-03-01), Brandtjen
patent: 4264265 (1981-04-01), Stoychoff

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