Descender with fall arrest and controlled rate of descent
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United States of America Patent
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Jan 8, 2013
Grant Date -
Mar 3, 2011
app pub date -
Aug 26, 2009
filing date -
Aug 26, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A device for providing a controlled maximum rate of descent down a rope and fall arrest. The device includes a movable cam that in response to tension on a rope pivots into a closed position, jamming the rope within the device and arresting a fall. Force applied to a torque arm coupled to the cam allows the cam to be pivoted to its open position, which allows rope travel. As cam is opened, the rope travels a more sharply angular path through the device, which creates a frictional force on the rope sufficient to limit the maximum rate of descent.
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