Rope hoist with an emergency braking arrangement
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United States of America Patent
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Feb 14, 2017
Grant Date -
Jan 15, 2015
app pub date -
Feb 11, 2011
filing date -
Feb 25, 2010
priority date (Note) -
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Abstract
A cable hoist having an emergency braking arrangement comprising a dual toothed wheel assembly driven via a cable drum of the hoist. One of two toothed wheels of the toothed wheel assembly is sensed by a sensing lever of an anchor and an opposite end of the anchor interacts with a ratchet wheel of the toothed wheel assembly. As soon as an over speed occurs, the anchor engages in the ratchet wheel and causes a rotary movement of a carrier on which the anchor is mounted. This rotary motion is used to trigger a mechanical braking arrangement coupled to the cable drum.
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