Ceiling ladder

Details Ceiling ladder Ceiling ladder

1990-08-10

1991-09-24

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Door and ladder

Door operates ladder

182163, E04F 1106

Patent

active

050507060

ABSTRACT:
A foldable ladder having a plurality of sections which align during use to form a continuous ladder and which are foldable upon themselves for storage in a ceiling frame. The ladder includes hinges for connecting the sections. Each hinge has a first load bearing surface and second load bearing surface which contact each other for support a load when the ladder is extended. The ladder also includes an improved counter balance assembly which connects the ladder to the ceiling frame; and a continuous hinge which connects the ladder to the ceiling frame in a manner which eliminates air from passing between the hinge and the ceiling frame.

REFERENCES:
patent: 437936 (1890-10-01), O'Brien
patent: 1811708 (1931-06-01), Bessler

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