Helical ramp life-preserver

Details Helical ramp life-preserver Helical ramp life-preserver

2006-05-23

2006-05-23

Thompson, II, Hugh B. (Department: 3634)

Fire escape, ladder, or scaffold

Chute or escape tower for personnel

C193S012000, C472S117000, C104S070000

Reexamination Certificate

active

07048092

ABSTRACT:
The present Patent of invention “HELICAL RAMP LIFE-PRESERVER” refers to a model of helical ramp, aimed for collective use, for immediate rescue of lives subjected to a probable fire, to be used in buildings of any height, or in places that cannot be reached by the devices currently in use, such as “Magirus” stairs, or even in those where these devices can reach, but a probable delay to help would put in risk people's life in an eventual emergency state.

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patent: 4049080 (1977-09-01), Suzuki
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patent: 4865311 (1989-09-01), Beekenkamp
patent: 6102762 (2000-08-01), Bell et al.
patent: 6467575 (2002-10-01), Chen
patent: 2101054 (1983-01-01), None

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