| 摘要 |
A hoist (10) for loads that includes an elongated upright support assembly (30) and an elongated extending support assembly (40) pivotally mounted to the upper end of the former. The free end of the elongated radially extending assembly (40) being able to follow a curved path in a horizontal plane. Elastic cable (50) is attached to non-elastic cable (60) that is wound in a spool assembly (70) so that the equilibrium point for the tool or equipment load can be adjusted at a vertical point. The spool assembly (70) is driven by an electric motor that in turn is activated by the wireless transmission of signals for winding and unwinding. These signals are produced when the tension at the end of the elastic cable (50) attached to the load falls outside a predetermined range.
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