Fire escape – ladder – or scaffold – Ladder with pivoted prop – Lateral prop
Patent
1979-04-13
1980-06-17
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Ladder with pivoted prop
Lateral prop
182204, E06C 104, E06C 536
Patent
active
042078865
ABSTRACT:
A pair of elongated stabilizing supports and a pair of mounts for support by opposite side rails of the ladder. The stabilizing supports each include a pair of generally parallel arms and have a first pair of end portions free of connections extending therebetween and connecting structure extending between and connecting the second pair of end portions thereof. Support structure mounts the stabilizing supports from the mounts in upwardly convergent positions with the first pair of end portions uppermost and for lengthwise adjustable shifting of the stabilizing supports relative to the mounts. The first pair of end portions of the stabilizing supports, when the latter are in upper adjusted positions thereof, embracingly receive the corresponding ladder side rails therebetween. The support structure includes support portions from and relative to which the stabilizing supports are lengthwise adjustably shiftable and the support portions are mounted on the mounts for angular displacement about generally parallel axes at least substantially normal to a plane containing the side rails of the ladder.
REFERENCES:
patent: 3012628 (1961-12-01), Zumbaum
patent: 3508628 (1970-04-01), Conrad
patent: 3933221 (1976-01-01), Sorenson
patent: 4147231 (1979-04-01), Chantler
Jacobson Harvey B.
Machado Reinaldo P.
O#Brien Clarence A.
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