Hydraulic drive mechanism for a vertical conveyor

Details Hydraulic drive mechanism for a vertical conveyor Hydraulic drive mechanism for a vertical conveyor

1996-12-27

1999-06-01

Young, Karen M.

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

Includes fluid supporting ram in drive-means

187213, 182141, 254 89H, 254 45, B66F 904

Patent

active

059080884

ABSTRACT:
An improved hydraulic drive mechanism for a vertical conveyor. The conveyor comprises a pair of upright supports or columns and a carriage to support a load or cargo is guided for vertical movement on the columns. The drive mechanism includes a pair of first hydraulic cylinder units and a pair of second hydraulic cylinder units that preferably have twice the length of the first cylinder units. The first or shorter cylinder units are connected between a movable cross beam and the carriage, while the second cylinder units are connected between the movable beam and the upper end of the frame. At a lower level both the first and second cylinder units are in an extended condition, while at an upper level both cylinder units are retracted.

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