Material or article handling – Elevator or hoist and loading or unloading means therefor – Comprising means enabling additional movement of carrier or...
Patent
1989-12-05
1991-04-30
Werner, Frank E.
Material or article handling
Elevator or hoist and loading or unloading means therefor
Comprising means enabling additional movement of carrier or...
414664, 414670, 414282, 414785, 74471, 180333, 180315, 60551, 187 9R, B66F 906
Patent
active
050113631
ABSTRACT:
A fork extension and retraction system for use with stockpickers automatically extends and retracts hydraulically extendable forks of a stockpicker when the load handler carrying the forks has moved to its extended position on the load side of the vehicle, and it also automatically retracts the forks if they have drifted from a home position before performing other fork related activities. Switches in the fork carriage assembly sense when the extendable forks are in the home position and near the home position. Other switches sense when the load handler assembly has reached its extreme positions on either side of the operator's platform. Still other switches are used to slow the traverse movement of the load handler assembly as it approaches its extreme positions, thus to cushion the shock of the load handler stopping. A control circuit senses the condition of these switches and controls the operation of both the load handle and the fork extension hydraulic system.
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Conley, III Walter
Dammeyer Ned E.
Klopfleisch Kim A.
Crown Equipment Corporation
Werner Frank E.
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