Chain stopper for chain puller
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United States of America Patent
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Feb 23, 2016
Grant Date -
Feb 21, 2013
app pub date -
Aug 16, 2011
filing date -
Aug 16, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A chain puller for use in marine salvage that includes a chain pulling platform having linearly disposed first and second chain stoppers. Each chain stopper includes a pair of pivotal doors that permit the passage of a chain in one direction while stopping the action of a chain moving in the opposite direction. The action on the pivotal doors uses gravity for vertical alignment. The pivotal doors are spaced apart the distance of a vertical chain-link in the static position and are pivotally spread apart to permit movement of the chain in one direction in the dynamic position.
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