Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Collapsible ladder
Patent
1978-09-11
1980-03-18
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Unitary foldable, rigid scaffold or ladder
Collapsible ladder
182 46, 182189, 182206, E06C 136, E06C 152, E06C 530
Patent
active
041934768
ABSTRACT:
A multi-purpose, lightweight, portable ladder comprising a plurality of link elements pivotally secured together in end-to-end relation, each link being of a substantially A-shaped configuration wherein one end of a first link is disposed between the legs of the next succeeding link and the two links are pinned together for relative rotation movement about the axis of the pin whereby the ladder may be folded or rolled into a relatively small configuration during periods of non-use. A hook member is secured to the outer end of the leading link in the chain of the ladder for facilitating securing of the ladder in a substantially vertical position, and the last link in the chain may be securely anchored to the ground for holding the ladder in the vertical position during periods of use.
REFERENCES:
patent: 277222 (1883-05-01), Bush
patent: 620902 (1899-03-01), Fabe
patent: 774470 (1904-11-01), Hamilton
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