Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Trestle
Patent
1985-01-22
1986-02-18
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Unitary foldable, rigid scaffold or ladder
Trestle
182186, 182226, F16M 1100
Patent
active
045707529
ABSTRACT:
A foldable saw horse which may be constructed of conventional wood two-by-fours, comprising a cross beam, a first pair of foldable legs at one end of the cross beam, and a second pair of foldable legs at the other end. Each pair of foldable legs include U-shaped brackets on each leg near the upper end connected by a hinge pin, for pivoting the legs between a spread apart working position and a side-by-side intermediate folded position. Each hinge pin in turn is connected at its inward facing end to a pivot plate pivotally mounted on a second hinge pin secured to the underside of the cross bar inset from each opposite end, each second hinge pin extending in a direction perpendicular to that of each first hinge pin. Thus, when the legs of each pair have been pivoted to the intermediate folded position on each first hinge pin, they may then be pivoted on each second hinge pin to the final folded position in side-by-side relationship to the cross beam. Hooks or other retaining means may be provided to hold the legs in the final folded position for convenience in carrying and storing.
REFERENCES:
patent: 1261007 (1918-04-01), Beardsley
patent: 1711328 (1929-04-01), Russell
patent: 1846144 (1932-02-01), Risbridger
patent: 2231519 (1941-02-01), Claude-Mantle
patent: 2243557 (1944-03-01), Johnson
patent: 2261217 (1941-11-01), Bond
patent: 2594464 (1952-04-01), Loucks
patent: 2673765 (1954-03-01), Storck
Chapman Richard E.
Moyer Gary V.
Kettelson Ernest
Machado Reinaldo P.
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