Adjustable ladder apparatus

Details Adjustable ladder apparatus Adjustable ladder apparatus

1991-09-09

1992-10-13

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder

Supporting surface compensating means

2481885, E06C 744

Patent

active

051542579

ABSTRACT:
A ladder apparatus including a plurality of spaced parallel ladder legs, with each ladder leg telescopingly mounting an extension leg relative to each ladder leg to accommodate uneven surface conditions. Interlocking structure is provided to secure each respective extension leg relative to a receiving cylinder relative to each ladder leg.

REFERENCES:
patent: 409711 (1889-08-01), Sickles
patent: 2581782 (1952-01-01), Anderson
patent: 3791487 (1974-02-01), Baumann
patent: 4423797 (1984-01-01), Batten
patent: 4671383 (1987-06-01), Huang
patent: 4744441 (1988-05-01), Sandstrom

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