Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Collapsible ladder
Patent
1975-08-04
1978-01-10
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Unitary foldable, rigid scaffold or ladder
Collapsible ladder
182 70, 403 96, 403102, E06C 1383, E06C 708, E06C 750
Patent
active
040674134
ABSTRACT:
A collapsible ladder for use as an emergency escapeway is described which has two side members between which rungs extend. The side members are each composed of a plurality of sections, which are pivoted to each other at overlapping ends. In one embodiment, the rungs extend between alternate pairs of the sections, while the intermediate sections are provided with fender spars which fold parallel with the section, and swing into position to space the ladder away from a wall, when the ladder is unfolded. The sections are held in place relative each other on unfolding of the ladder by a pin on one section received in an arcuate slot partially surrounding the pivot of the next section. In a modified embodiment each section has at each end adjacent the pivot a stud and a recess, which engage complimentary recesses and studs on the adjacent sections.
REFERENCES:
patent: 33963 (1861-12-01), Shannon
patent: 308179 (1884-11-01), Linnenbrink
patent: 628824 (1899-07-01), Maier
patent: 765598 (1904-07-01), Schlag
patent: 955314 (1910-04-01), Borne
patent: 992785 (1911-05-01), Lloyd
patent: 1102461 (1914-07-01), Vaughan
patent: 1696357 (1928-12-01), Johnson
patent: 2301077 (1942-11-01), Payton
patent: 3474881 (1969-10-01), Green
patent: 3677366 (1972-07-01), Loeffel
Gregg Edward B.
Machado Reinaldo P.
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