Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1980-07-07
1982-12-21
Butler, Douglas C.
Material or article handling
Vertically swinging load support
Shovel or fork type
414706, E02F 300
Patent
active
043647057
ABSTRACT:
A linkage system for automatically maintaining the orientation of a bucket of a loader while the lift arms are moved between raised and lowered positions is disclosed. A pair of articulated links are added to the linkage producing the self-leveling function to increase or decrease the amount of tilt applied to the rolled back bucket relative to the tilt applied to the bucket by the cross link alone. The articulated links are also used to maximize the force applied to the bucket to rotate it from the dig position to the rolled back position. The combination of a self-leveling feature together with a loader applying the maximum available force to roll back the bucket results in a loader arrangement which optimizes the efficiency of the loader and the productivity of the operator.
REFERENCES:
patent: 2817448 (1957-12-01), Pilch
patent: 3122246 (1964-02-01), Freedy
patent: 3412885 (1968-11-01), Pensa
patent: 3720338 (1973-03-01), Stout
patent: 3786953 (1974-01-01), Crum
Butler Douglas C.
J. I. Case Company
Siemens Terrance L.
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