Winch and winch drum
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United States of America Patent
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-
Aug 20, 2002
Grant Date -
N/A
app pub date -
Feb 22, 2001
filing date -
Aug 28, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Rope-holding characteristics of a winch drum (2) are determined by a staggered array of pyramidal protuberances (12, 14, 17, 19) on its surface. The staggering is such that there is no true circular path round the drum within the array, and a rope wound on it in the hoop direction is deflected sinusoidally.
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Cited Art Landscape
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