Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Trestle
Patent
1981-06-17
1983-06-07
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Unitary foldable, rigid scaffold or ladder
Trestle
182181, 182225, 108118, 248164, 269296, B27B 2100, F16M 1100
Patent
active
043866778
ABSTRACT:
A rigid sawbuck assembly to be supported by four lengths of lumber such as 2.times.4's which form foldable "X" shaped legs. An elongated axially extending cross bar axle extends between two pairs of juxtaposed metal plates, a pair of which are at each opposite end thereof, journalled on said pipe for rotation. The plates are attached to the lengths of lumber and include lugs on the inner plates of each pair extending from the side edge into the path of rotation of the side edge of the outer plate of each pair to serve as a stop. A cross brace is attached between the lower portions of the innermost legs so that said sawbuck is rigid, foldable, compact and can be stored. Because of the flat plate structure, 2.times.6's or other sizes of lumber may be used for the legs.
REFERENCES:
patent: 808940 (1906-01-01), Meisel
patent: 930394 (1909-08-01), Bourgeois
patent: 1104103 (1914-07-01), Carpenter
patent: 1523663 (1925-01-01), Slama
patent: 2957736 (1960-10-01), Olander
patent: 3157136 (1964-11-01), Moody
patent: 3704674 (1972-12-01), Johnson
patent: 4133412 (1979-01-01), Hildebrandt
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