Material or article handling – Load-transporting type vehicle and external means... – Of driven type – for unloading a wheeled vehicle
Patent
1991-07-24
1992-12-29
Huppert, Michael S.
Material or article handling
Load-transporting type vehicle and external means...
Of driven type, for unloading a wheeled vehicle
414399, 414666, 414667, 414672, E02F 336
Patent
active
051747081
ABSTRACT:
A freight manipulation includes a tracked chassis with an articulated cantilever boom extending therefrom which is capable of swinging about a horizontal tilt axis. A tool carriage, mounted at the end of the boom by a multiple stage lift mast, has a pair of freight engaging tools thereon. the telescoping mast includes an upper frame connected to the boom for pivoting about a vertical axis, a middle frame, and a lower frame having the tool carriage slidably mounted thereon. A pair of secondary lift cylinders are connected between the upper and middle frames. A pair of secondary lift chains are connected between the upper and lower frames and engage pulleys on the middle frame such that as the secondary cylinders extend or retract to respectively lower or raise the middle frame, the lower frame is lowered or raised relative to the middle frame. A primary lift cylinder is connected to the lower frame, and a pair of primary lift chains engaging pulleys on a ram of the primary cylinder are connected between the lower frame and the tool carriage whereby the tool carriage is lowered or raised as the primary cylinder is respectively extended or retracted.
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Standard Lift Truck Systems w/Versalift action, Standard MfrCo. Received by PTO before Oct. 1979.
Hartley, John; "Specialisation Is The Watchword on Tokyo Robot Show Stands"; The Engineer; Nov. 3, 1977; pp. 65-67.
Haney Ronald J.
Ruder Carl J.
Huppert Michael S.
Skatz Robert S.
Yellow Freight System, Inc.
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