Freestanding ladder structure

Details Freestanding ladder structure Freestanding ladder structure

1975-12-18

1977-05-17

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Safety device for ground-supported ladder

Terminal foot or shoe

182118, 182 46, 182 97, 182106, E06C 900

Patent

active

040236471

ABSTRACT:
A freestanding ladder structure has a first base member arranged on one side of an object to be bridged, a second base member arranged on the other side of the object, and a raised platform supported above the object by two ladder members having their lower end portions engaged with the base members. The various parts and components of the ladder structure are hollow or tubular and may be conveniently formed of plastic by a well known blow molding technique. Where necessary, a reinforcing insert is arranged within a component to resist flexure or bending thereof. Some components are provided with hook members engagable with other components to prevent unintended separation of the assembled components.

REFERENCES:
patent: 2896831 (1959-07-01), Ellingson
patent: 3009532 (1961-11-01), Richard
patent: 3908795 (1975-09-01), Gannon
patent: 3914061 (1975-10-01), Meyer

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