Fire escape – ladder – or scaffold – Convertible – Ladder
Patent
1987-09-16
1988-08-16
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Convertible
Ladder
182 33, 182 46, 182153, B27B 2100
Patent
active
047637579
ABSTRACT:
A support device having two end members, a pair of spacer members with hinges at their outer ends and intermediate hinges at their inner ends and swingable between a stored position and an extended position, a pair of transverse support panels with hinges at their outer ends and intermediate hinges at their inner ends, the support panels being swingable between an upwardly stored position, and a downwardly extended position in which they lie in a common transverse plane, adjacent the upper edges of the spacer members, with the support panels resting on the upper edges of the spacer members.
REFERENCES:
patent: D213400 (1969-02-01), Cannon
patent: 493479 (1893-03-01), Carl
patent: 1625294 (1927-04-01), Whitesides
patent: 1943871 (1934-01-01), Landberg
patent: 4113056 (1978-09-01), De Lorenzo
patent: 4124093 (1978-11-01), Breisch
patent: 4296834 (1981-10-01), Korger
patent: 4319663 (1982-03-01), Barden
patent: 4403678 (1983-09-01), Zieg
patent: 4437413 (1984-03-01), O'Brien
patent: 4534447 (1985-08-01), Champigny
patent: 4638885 (1987-01-01), Frederick
Machado Reinaldo P.
Rolston George A.
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