Fire escape – ladder – or scaffold – Wall- or floor-attached – Independent rung or step
Patent
1977-10-19
1979-01-16
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Wall- or floor-attached
Independent rung or step
182186, 182226, F16M 1100
Patent
active
041344731
ABSTRACT:
A portable scaffolding comprising a plank with frame members supporting each end thereof. The frame members include legs of steel angles which are interconnected at their lower portions by toggle arms for collapsing, and at their upper ends by threaded members for adjusting the spacing thereof. Inwardly facing channel members on the upper ends of the legs are received over the opposite edges of the plank.
Another pair of channel members adapted to be received over the edges of the plank are also drawn together by threaded members, and depending from one of them is a step to facilitate stepping up onto the scaffold.
REFERENCES:
patent: 2938596 (1960-05-01), Vanyo
patent: 3139951 (1964-07-01), Clayton
Machado Reinaldo P.
Stidham Melvin R.
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