Fire escape – ladder – or scaffold – Platform – Relatively movable sections
Patent
1990-07-31
1991-11-26
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Platform
Relatively movable sections
182119, E04G 508
Patent
active
050675893
ABSTRACT:
A support having two support sections slidably engaged with each other includes a lock that can be used to releasably fix the size of the support surface defined by the support sections. The lock is mounted to one of the support sections and includes a shaft that can be received by any of the series of openings defined by the remaining support section. When the shaft is located within an opening, the positions of the support sections relative to each other are fixed, and the support surface will remain stable during use.
REFERENCES:
patent: 1267618 (1918-05-01), Andersen
patent: 2120158 (1938-06-01), Starrick
patent: 3282378 (1966-11-01), Pierce
patent: 3889779 (1975-06-01), Kummerlin
patent: 4768620 (1988-09-01), South
Machado Reinaldo P.
R. D. Werner Co., Inc.
Schwartz Ansel M.
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