Fire escape – ladder – or scaffold – Wall- or floor-attached – Ladder
Patent
1979-01-22
1980-04-22
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Wall- or floor-attached
Ladder
182106, 182189, 182194, 182228, E06C 902, B63B 2920
Patent
active
041990404
ABSTRACT:
A ladder is provided which is especially adapted for shipboard use and which is safe and comfortable to use, of relatively light weight and occupying relatively small floor and overhead space. The ladder comprises a single stringer disposed between upper and lower deck or floor levels at a predetermined angle of inclination, and having an array of half treads on each side of the stringer, each array being vertically spaced from the other along the length of the stringer. The half treads are affixed to and extend from the respective sides of the stringer and each include an integral outwardly extending portion which terminates in a plane forward of a plane passing through the front edges of the treads. Handrails are disposed in this forward plane and are affixed to and supported by the outwardly extending tread portions.
REFERENCES:
patent: 234389 (1880-11-01), Cannon
patent: 858199 (1907-06-01), Modjeski
patent: 2641401 (1953-06-01), James
patent: 3310132 (1967-03-01), Rolland
patent: 3467220 (1969-09-01), Smith
patent: 4061202 (1977-12-01), Campbell
patent: 4069892 (1978-01-01), Lynne
patent: 4125175 (1978-11-01), Ernst
Machado Reinaldo P.
The Laitram Corporation
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