Collapsible ladder device

Details Collapsible ladder device Collapsible ladder device

1986-08-25

1987-07-07

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Unitary foldable, rigid scaffold or ladder

Collapsible ladder

182 96, 182212, E06C 1383

Patent

active

046780602

ABSTRACT:
This invention relates to a ladder device, particularly to one that is collapsible. More particularly, provided is a ladder that can be opened or closed from the ground or some elevated point. Additionally, there is provided a feature so that the ladder can be completely closed. The ladder comprises a remote-control system that permits all of the above-identified attributes to be accomplished.

REFERENCES:
patent: 314899 (1885-03-01), Wilson
patent: 350047 (1886-09-01), Dunn
patent: 364546 (1887-06-01), Roed
patent: 785810 (1905-03-01), Koopman
patent: 1140281 (1915-05-01), Otto
patent: 1232221 (1917-07-01), Chesebro
patent: 2492511 (1949-12-01), Yehling
patent: 2727671 (1953-03-01), Ollerhead
patent: 2962113 (1960-11-01), Heimlicher
patent: 3414081 (1968-12-01), Wedvik
patent: 3439776 (1968-04-01), Scheerer
patent: 3480106 (1969-11-01), Weiner
patent: 3517770 (1970-06-01), Loix
patent: 4463829 (1984-08-01), Grin

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