Front-loading hydraulic excavator

Details Front-loading hydraulic excavator Front-loading hydraulic excavator

1979-12-11

1982-02-23

Saifer, Robert W.

Material or article handling

Vertically swinging load support

Shovel or fork type

414707, E02F 328

Patent

active

043166970

ABSTRACT:
A hydraulic excavator has a bucket actuating and control linkage comprising a boom pivotally connected at one end to a self-propelled vehicle, a stick pivotally connected at one end to the other end of the boom, and a bucket pivotally mounted on the other end of the stick. A pair of hydraulic cylinders for actuating the bucket are pivotally connected to the boom via a pair of bucket attitude control bellcranks, respectively. By adjustment of the angular position of the bucket attitude control bellcranks relative to the boom, as by another pair of hydraulic cylinders, the bucket can be conditioned for a level crowd attitude, crowd-to-carry attitude, or crowd-to-dump attitude.

REFERENCES:
patent: 125999 (1872-04-01), White
patent: 1156789 (1915-10-01), Lough
patent: 3259259 (1966-07-01), Metailler
patent: 3872991 (1975-03-01), Pasideris et al.
patent: 3952890 (1976-04-01), Armstrong

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