Fire escape – ladder – or scaffold – Torso harness – Strand-engaging – with descent retarder
Patent
1992-08-12
1994-09-20
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Torso harness
Strand-engaging, with descent retarder
182241, 182192, A62B 108
Patent
active
053481160
ABSTRACT:
A rescue system is provided which includes a hoist having a backplate and a rope drum mounted on said backplate, with the rope drum adapted to receive a rope wound at least one and one half times about a rope engaging surface on the drum. The drum is rotatable in one direction when a pulling force is exerted on a control end of the rope and blocked against rotation in an opposite direction when a pulling force is exerted on a load end of the rope, so that the rope drum provides a braking force on said rope when a force is exerted on the load end of the rope. The hoist includes an arcuate rope guide fixed to the backplate and extending at least 200.degree. about the drum, and the drum itself is provided with a rope engaging surface including a cylindrical portion and a tapered portion, with the tapered portion lying closest to said backplate. Additional system components for use in conjunction with the hoist include a centrifugal brake mechanism, a swivel pulley and a handled acsender.
REFERENCES:
patent: 1071502 (1913-08-01), Boufford
patent: 1650281 (1927-11-01), Knudson
patent: 3703218 (1972-11-01), Brda
patent: 3759346 (1973-09-01), Brda
patent: 3807696 (1974-04-01), Brda
patent: 4580658 (1986-04-01), Brda
patent: 5168958 (1992-12-01), Wallimann
Rollgliss Company flyer for the Rollgliss Standard.
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