Excavator having lifting legs and cooperating boom mounted bucke

Details Excavator having lifting legs and cooperating boom mounted bucke Excavator having lifting legs and cooperating boom mounted bucke

1975-07-18

1977-09-20

Burr, Edgar S.

Motor vehicles

Special driving device

Stepper

37103, 214138R, B62D 5700

Patent

active

040490700

ABSTRACT:
An excavator has its cabin and boom mounted bucket on a rail carriage which may be moved along the excavator frame by means of a first set of hydraulic cylinders. Lifting legs are mounted on the sides of the rail carriage and are associated with a second set of hydraulic cylinders for lifting the under-frame in cooperation with the bucket. The lifting legs and bucket form a 3-point stance when pressed against the ground. In this stance the under-frame may be translated by said first set of hydraulic cylinders and/or turned relative to the upper-frame by motor means. This arrangement allows the excavator to "walk" out of difficult situations.

REFERENCES:
patent: 1715745 (1929-06-01), Edmondson
patent: 2897986 (1959-08-01), Davis
patent: 3425572 (1969-02-01), Brach
patent: 3545627 (1970-12-01), LeTourneau
patent: 3608756 (1971-09-01), Guinot
patent: 3625381 (1971-12-01), Menzi
patent: 3747718 (1973-07-01), Gauchet
patent: 3777898 (1973-12-01), Gallay
patent: 3918742 (1975-11-01), Gaibler et al.

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