Fire escape – ladder – or scaffold – Torso harness – Strand-engaging – with descent retarder
Patent
1996-03-21
1999-09-07
Chin-Shue, Alvin
Fire escape, ladder, or scaffold
Torso harness
Strand-engaging, with descent retarder
182191, 188 654, A62B 3500
Patent
active
059472294
ABSTRACT:
An energy absorbing device for a safety device with a rope, comprises a metal body equipped with a first orifice of ellipsoidal shape allowing two strands of rope to cross without clearance, and a second reverse V-shaped orifice of decreasing cross-section in the direction of the first orifice. The second orifice has a portion of reduced width of a smaller dimension than the diameter of the rope, and two convergent edges for centering the rope when the turn is tightened during sliding. The lanyard may be used for rock-climbing, or for working at heights.
REFERENCES:
patent: 316870 (1885-04-01), Braunfeld
patent: 890898 (1908-06-01), Gaillae
patent: 4667772 (1987-05-01), Kammerer
patent: 4774742 (1988-10-01), Johnson
Hede Jean Marc
Petzl Paul
Chin-Shue Alvin
Zedel
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