WINCH DRUM AND CRANE PROVIDED THEREWITH
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United States of America Patent
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Issued Date -
Mar 11, 2021
app pub date -
Jan 11, 2019
filing date -
Jan 16, 2018
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Abstract
An inner face of a flange of a winch drum is provided with a rope guide part that guides a rope portion in a higher layer such that the rope portion in the higher layer crosses a rope portion in a lower layer in a first crossing section, and a ridge line of the rope guide part has a shape that is displaced in a winding rotation direction with respect to a baseline passing through a rotation axis and an inner edge of the ridge line as proceeding from the inner edge to an outer edge.
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