Self-locking descender for a rope with an operating lever

Details Self-locking descender for a rope with an operating lever Self-locking descender for a rope with an operating lever

1996-10-07

1998-12-22

Stodola, Daniel P.

Fire escape, ladder, or scaffold

Single stile, strand or pole

Flexible

182 5, 188 655, A62B 120

Patent

active

058508937

ABSTRACT:
A self-locking descender for a rope comprises a pulley in the form of a rotary cam designed to press the rope against a braking surface of a stud. The pulley is mounted on an operating plate associated with an operating handle. To reduce the unlocking force on the operating lever, a part of the friction forces is taken up by a load-shedding pin situated facing the circular sector of the cam. The rope passes via the load-shedding pin and comes partially into contact with the pulley.

REFERENCES:
patent: 209137 (1878-10-01), Rotschka etal.
patent: 1229394 (1917-06-01), Abramson
patent: 4399889 (1983-08-01), Todd
patent: 4576248 (1986-03-01), Marom
patent: 4580658 (1986-04-01), Brda
patent: 4596314 (1986-06-01), Rogelja
patent: 5054577 (1991-10-01), Petzl et al.
patent: 5597052 (1997-01-01), Rogelja

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