Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Trestle
Patent
1976-05-17
1977-09-13
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Unitary foldable, rigid scaffold or ladder
Trestle
182179, 182181, 182222, E04G 118
Patent
active
040475948
ABSTRACT:
A scaffold and platform adaptable for assembly and disassembly consisting of similar rectangular platform blocks functioning together as lateral beams, each provided with upper and lower frames which are each adjustable manually as to height and which are supported always by means of two scissor members on the two opposite longitudinal sides, whereby the legs of the scissors are articulated with one end at a corner point of the lower frame, and can be arrested at their other upper end at the lateral beams of the upper frames in different positions, being characterized by intermediate slabs which are attachable at their upper frames and are insertable between the longitudinal sides of the platform blocks and wherein said intermediate slabs are joined to the middle longitudinal area of the upper frame-lateral beams of the platform block by attaching elements, which engage with the adjusting path of the upper ends of the legs of the scissors and limit the adjustment of height of the platform blocks to a permissible minimum height.
REFERENCES:
patent: 2775490 (1956-12-01), Hofrichter
patent: 2806747 (1957-09-01), Jaeger
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