Extension device for a ladder

Details Extension device for a ladder Extension device for a ladder

1990-10-05

1991-07-02

Chotkowski, Karen J.

Fire escape, ladder, or scaffold

Ladder

Supporting surface compensating means

2481882, 182111, E06C 700

Patent

active

050279238

ABSTRACT:
An attachment for a ladder includes a housing and an extensible leg. The housing is clamped to the side of a ladder, and the extensible leg is extended to engage the ground after the ladder has been placed level. A bubble level is provided for visually determining when the ladder is level.

REFERENCES:
patent: 440185 (1890-11-01), Myers
patent: 1266466 (1918-05-01), Hill
patent: 2205869 (1940-06-01), Wakeman
patent: 2845719 (1958-08-01), Thomiszer
patent: 2911134 (1959-11-01), Derby et al.
patent: 2914135 (1959-11-01), Crouch
patent: 3311337 (1967-03-01), Hagen
patent: 4761092 (1988-08-01), Nakatani
patent: 4766976 (1988-08-01), Wallick, Jr.

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