Lifting device
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United States of America Patent
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Oct 23, 2007
Issued Date -
N/A
app pub date -
Nov 15, 2006
filing date -
Jan 12, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A lifting device comprises four pairs of hoisting cables arranged in a V-shape relative to one another for lifting and lowering a load suspension apparatus at which they engage and which are taken off from drivable cable drums. The free lengths of the hoisting cables of two longitudinal pairs of cables lie in longitudinal planes which are located at a distance from one another, and the free lengths of the hoisting cables of two transverse pairs of cables lie in transverse planes which are located at a distance from one another and which extend at right angles to the longitudinal planes. Two mechanically separate hoists are provided for the hoisting cables of the two longitudinal cable pairs and for the hoisting cables of the two transverse cable pairs, each of the hoists is drivable by its own driving motor, and the driving motors are controlled by a common control device.
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