Material or article handling – Elevator or hoist and loading or unloading means therefor – Comprising means enabling additional movement of carrier or...
Patent
1999-01-11
2000-05-23
Keenan, James W.
Material or article handling
Elevator or hoist and loading or unloading means therefor
Comprising means enabling additional movement of carrier or...
414607, 414671, B66F 914
Patent
active
060659262
ABSTRACT:
An adjustable fork tractor system is disclosed. The system includes a pair of adjustable forks having remote ends and having near ends with vertical support bars having lower ends attached to the forks adjacent to the near ends and having upper ends with angled support brackets coupling the support bars with the forks adjacent to their near ends. A supporting structure is provided and includes two vertically disposed beams with a horizontal connecting rod coupling the beams adjacent to their lower ends. A channel iron couples the upper ends of the beams. The channel iron has an upper edge with downwardly extending notches along the length thereof. There is provided a pair of rigid sleeves with central apertures slidably received on the rod and fixedly secured at the juncture of the forks and vertical support bars to allow the lateral sliding of the adjustable forks with respect to the rod and supporting structure. A pair of fork locks are pivotally secured to the fork beams adjacent to their upper extents with outwardly extending handles to allow the locks to be raised. The adjustable forks may be laterally adjusted toward and away from each other. In this lowered orientation the locks will be received within preselected notches to thereby secure the locks, vertical support beams and adjustable forks in a predetermined spaced position for operation and use as a function of the load to be lifted.
REFERENCES:
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patent: 4280781 (1981-07-01), Bodin
patent: 4355947 (1982-10-01), Wiblin
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