Hydraulic excavator

Details Hydraulic excavator Hydraulic excavator

1981-10-23

1983-07-19

Eickholt, E. H.

Excavating

Railway graders

Side former

414687, E02F 522

Patent

active

043936075

ABSTRACT:
A hydraulic excavator having first and second booms pivoted end to end, plus an arm pivotally connected to a swinging end of the second boom. A bucket is pivotally mounted at the leading end of the arm. A boom operating linkage mechanism including a lever and hydraulic cylinders is mounted on a full-revolving base for swinging the first boom with respect to the base. The arm is adapted to rotate with respect to the second boom and therefore the bucket is capable of providing both back hoe and front loading operations.

REFERENCES:
patent: 3576268 (1971-04-01), Suverkrop
patent: 3703973 (1972-11-01), Nilsson
patent: 3922017 (1975-11-01), Cobb
patent: 4293269 (1981-10-01), Zook

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