Portable and collapsible A-frame prop type scaffold

Details Portable and collapsible A-frame prop type scaffold Portable and collapsible A-frame prop type scaffold

1979-08-28

1980-12-30

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Unitary foldable, rigid scaffold or ladder

Trestle

182181, 182225, F16M 1100

Patent

active

042418089

ABSTRACT:
A portable and collapsible A-frame prop type scaffold including pairs of spaced apart L-shaped metal angle A-frame supporting legs pivotally connected at their upper points of juncture and having scaffold plank supporting angle brackets pivoted to the upper ends thereof and extendable at right angles thereto, with foldable and interconnectable bars spanning and pivoted to and spreading the legs apart, and locking support angle braces pivoted to the outer ends of the supporting angle brackets and extending angularly downwardly therefrom, with transverse angle bars on the lower ends thereof engageable with the foldable bars. Flat locking straps arranged beneath the locking support angle braces with upwardly and outwardly curved outer ends insertable within slots in the lower ends of the angle braces so as to be pivoted thereto and be extendable rearwardly beneath and in engagement with the abutting foldable bars and transverse angle brackets, with the inner ends of the locking straps being secured to the angle braces by slidable encircling locking rings thereon for readily and securely clamping and locking the angle braces to the foldable bars and legs.

REFERENCES:
patent: 1576583 (1926-03-01), England
patent: 1880909 (1932-10-01), Dunlap
patent: 2272957 (1942-02-01), Walp
patent: 2966957 (1961-01-01), Ireland
patent: 3040834 (1962-06-01), Dakin
patent: 3098540 (1963-07-01), Hiner
patent: 3388771 (1968-06-01), Corneliusen
patent: 4004652 (1977-01-01), Alvarado

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