Folding ladder

Details Folding ladder Folding ladder

1989-03-14

1990-08-14

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Convertible

Ladder

182 27, 182 46, 182163, 182228, E06C 128, E06C 708

Patent

active

049479598

ABSTRACT:
A folding ladder comprising of four straight sections each consisting of two uprights and four rungs equally spaced. The sections are connected with insulating hinged joints which can be tightened immovable or loosened movable by means of a lever handle thus allowing the adjustment of the ladder into various configurations.

REFERENCES:
patent: 2621689 (1952-12-01), Fordon
patent: 3980157 (1976-09-01), Wrigley
patent: 4666328 (1987-05-01), Ryu
patent: 4773503 (1988-09-01), Purkapile

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