Lifting apparatus for highly-mounted device and control method thereof
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United States of America Patent
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Feb 15, 2022
Grant Date -
Sep 24, 2020
app pub date -
Oct 26, 2018
filing date -
Oct 27, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a control method of a lifting apparatus for a highly-mounted device. The control method includes (a) outputting a descending signal in a state where the main body and the lifting body are coupled; (b) determining whether the lifting body is normally released downward from the main body according to the descending signal; and (c) stopping the driving motor or executing the step (a) again when the lifting body is not normally released downward, wherein in the step (b), it is determined whether the lifting body is normally released downward from the main body by checking whether a weight of the lifting body is applied to the wire rope.
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