Hydraulic excavator

Details Hydraulic excavator Hydraulic excavator

1980-04-11

1981-11-24

Eickholt, E. H.

Excavating

Snow or ice removing or grooming by portable device

Railway clearer

414722, E02F 332

Patent

active

043016073

ABSTRACT:
A hydraulic excavator comprising a vehicle, a boom pivotally connected at one end to the vehicle, a stick pivotally connected at one end to the other end of the boom, a bucket pivotally connected to the other end of the stick. A bucket attitude maintaining arrangement is provided to maintain a substantially fixed preselected attitude of the bucket with respect to the ground upon movement of the stick about its pivotal connection to the boom. The bucket attitude maintaining arrangement includes a lever pivotally mounted at one end to the stick and a compensating cylinder pivotally connected at one end to the stick and at the other end to the lever.

REFERENCES:
patent: 3583585 (1971-06-01), Joyce
patent: 3584751 (1971-06-01), Bellart
patent: 3862697 (1975-01-01), Gill et al.
patent: 3927781 (1975-12-01), Okabe
patent: 4077140 (1978-03-01), Branconi
patent: 4171054 (1979-10-01), Tanaka et al.
patent: 4218837 (1980-08-01), Peterman

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