Retractable ladder apparatus

Details Retractable ladder apparatus Retractable ladder apparatus

1991-02-07

1992-05-12

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Automatic control

182 79, 182163, E06C 906

Patent

active

051119064

ABSTRACT:
A retractable ladder apparatus (30) for access between a lower and an upper floor is provided. A ladder (60) is moved by moving means, which may be a garage door opener (40), between a position of storage within the upper floor to a position where the lower end of the ladder abuts the lower floor.

REFERENCES:
patent: 897870 (1908-09-01), Bessler
patent: 1636279 (1927-07-01), Bessler
patent: 1636280 (1927-07-01), Bessler
patent: 1636281 (1927-07-01), Bessler
patent: 1749409 (1930-03-01), Bessler
patent: 1805829 (1931-05-01), Marschke
patent: 1811707 (1931-06-01), Bessler
patent: 1858981 (1932-05-01), Bessler
patent: 1930992 (1933-10-01), Bessler
patent: 2931456 (1960-04-01), Harmon
patent: 3789955 (1974-02-01), Knapp

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