Fire escape – ladder – or scaffold – Convertible – Ladder
Patent
1991-03-12
1994-07-26
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Convertible
Ladder
182118, E04G 100
Patent
active
053320620
ABSTRACT:
A combination scaffold ladder device having a scaffold portion which is formed by a prop positioned above a pair of ladder side members, and is connected to the sides by connecting means which include a top step and a pair of extensible spreaders. The parallel ladder side members each contain at least one indentation, and are joined together by a plurality of ladder steps with two of the steps being partial in nature. The ladder structure and the prop in the horizontal position is supported by versatile support members that are attached near the top of the versatile support member housings to the parallel ladder side members by a plurality of pivotable joint pins and locked into position by a further plurality of extensible spreaders. By placing the scaffold on its side or in a vertical position and releasing the locking means on the extensible spreaders by pivoting the versatile support members by means of pivotting joining pins into the indentations of the parallel ladder side members simultaneously joining two partial step/pullout bars of the versatile support members with their mating partial steps on the ladder structure in a parallel manner forming complete steps and transforming the invention into a flat horizontal platform. The vertical placement of the ladder structure away from the prop through the use of extensible spreaders affords the invention its stepladder configuration.
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patent: 4284171 (1981-08-01), Owen
patent: 4823911 (1989-04-01), Dore
Chin-Shue Alvin C.
Walker Alfred M.
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