Safety descent device
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United States of America Patent
Stats
-
Jun 18, 1985
Issued Date -
N/A
app pub date -
Apr 2, 1984
filing date -
Jun 3, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A portable descent device for lowering an object at a controlled speed has a rotating spool carrying wrapped cable mounted within a casing. The spool rotates about a fixed shaft in a sealed chamber containing a viscous liquid. A series of alternating, closely adjacent, flat, parallel, rotatable and non-rotatable discs are mounted in the sealed chamber and extend radially of the shaft. As cable is payed out from the device, movement of the rotatable discs through the fluid creates a frictional drag which slows the descent rate to a relatively constant, safe speed.
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Family
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