Modular constructional element in particular of a ladder or scaf

Details Modular constructional element in particular of a ladder or scaf Modular constructional element in particular of a ladder or scaf

1988-06-10

1990-03-13

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Stackable

Male and female connecting means

182107, 182104, 182120, E06C 110, E06C 118

Patent

active

049076752

ABSTRACT:
This modular constructional element (14), which is of the type comprising at least two uprights between which at least one crosspiece extends, is such that each end of the uprights is screw-threaded and adapted to cooperate with a fixing ring (18, 19) for fixing the element (14) to an adjacent means (15).

REFERENCES:
patent: 349049 (1886-09-01), Lippincott
patent: 724953 (1903-04-01), Schaller
patent: 2201608 (1940-05-01), Causey
patent: 3476211 (1969-11-01), Cormier
patent: 3747689 (1973-07-01), Frederick
patent: 4086980 (1978-05-01), Shortes

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