Multi-purpose extendable and retractable ladder

Details Multi-purpose extendable and retractable ladder Multi-purpose extendable and retractable ladder

1989-06-16

1991-02-05

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Ladder with pivoted prop

Section extensible below prop pivot

182 24, 182173, 182195, E06C 112

Patent

active

049896920

ABSTRACT:
A ladder that includes two hinged sections that can be oriented in an inverted V-configuration for use as a step ladder, or in a straight linear configuration for use as a straight ladder. Each section of the ladder includes a number of U-shaped support units, each of which defines a crossbar and two downwardly extending side rails. The side rails of the different U-shaped units are of graduated cross sectional dimension, such that the units can be contracted together by telescopically sliding the aligned side rails within one another.

REFERENCES:
patent: 1936508 (1933-11-01), Hanly et al.
patent: 2827216 (1958-03-01), Napolitano

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