Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Trestle
Patent
1977-01-28
1978-09-12
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Unitary foldable, rigid scaffold or ladder
Trestle
182181, F16M 1100
Patent
active
041130561
ABSTRACT:
Complementary leg-defining stampings hingedly secured together at the tops thereof with upper and lower integral struts between the defined legs at opposite ends of each thereof and including a pair of longitudinally extending shelf sections hingedly connected and projecting inwardly from the lower struts and hingedly fastened together at their inner meeting edges.
REFERENCES:
patent: 1245632 (1917-11-01), Straub
patent: 1604254 (1926-10-01), Bate
patent: 1742637 (1930-01-01), Dearborn
patent: 1818516 (1931-08-01), Willis
patent: 3057591 (1962-10-01), Weimer
patent: 3275281 (1966-09-01), Sampson
patent: 3460795 (1969-08-01), Dahlin
patent: 3880406 (1975-03-01), Stehle
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