Fire escape – ladder – or scaffold – Stackable – Male and female connecting means
Patent
1975-02-12
1977-04-19
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Stackable
Male and female connecting means
182194, 182228, 52182, E04F 1100
Patent
active
040183009
ABSTRACT:
This case discloses a stairway having a plurality of treads which are compressed between spacer blocks functioning as stringers. The compression is effected by rods, the heads of which are encased in mortises which are suitably covered.
REFERENCES:
patent: 2257001 (1941-09-01), Davis
patent: 3473275 (1969-10-01), Lappin
Machado Reinaldo P.
Menuiserie du Val de Rhins R. Boucher S.A.
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