Ladder extension device

Details Ladder extension device Ladder extension device

1988-01-28

1989-07-04

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder

Supporting surface compensating means

182184, 2481888, E06C 744

Patent

active

048442089

ABSTRACT:
A ladder accessory for releasably securing a wooden extension to a leg of a ladder comprises a metal channel member for receiving the ladder extension so as to allow longitudinal sliding adjustment of the extension relative to the channel member. A shaft rotatably mounted in opposed walls of the channel member carries a plurality of gripping pins and has a handle by which the pins can be rotated into indenting engagement with the extension for gripping and retaining the extension relative to the channel member, which is secured by a clamping device to the ladder leg. The handle rests against the extension below the shaft so as to prevent rotation of the shaft by the weight of the ladder.

REFERENCES:
patent: 682783 (1901-09-01), Brooks
patent: 741541 (1903-10-01), Phipps
patent: 908387 (1908-12-01), Boyd
patent: 1462505 (1923-07-01), Hunt
patent: 2854293 (1958-09-01), Riblet
patent: 2891819 (1959-06-01), Jackson
patent: 3882966 (1975-05-01), Fasano
patent: 4296835 (1981-10-01), Koffski
patent: 4502565 (1985-03-01), Koffski

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