Fire escape – ladder – or scaffold – Wall- or floor-attached – Ladder
Patent
1979-04-27
1981-01-06
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Wall- or floor-attached
Ladder
182160, E06C 912
Patent
active
042431190
ABSTRACT:
A pair of upstanding elongated side rails are provided and interconnected by a plurality of vertically spaced horizontal elongated rungs extending therebetween and pivotally attached at their opposite ends to the corresponding side rails whereby a foldable parallelogram construction is provided. One of the side rails includes anchor structure for anchoring the one side rail in an upright position relative to a suitable support structure and the assembly is foldable between a first closed position with the side rails closely adjacent each other and the rungs generally paralleling the side rails and a second open position with the side rails spaced apart and the rungs generally horizontally disposed. The other side rail is swingable outwardly and downwardly relative to the one side rail upon folding of the assembly from the closed position toward the open position thereof and elongated collapsible inclined brace structure is connected between an upper portion of the one side rail and a lower portion of the other side rail and limits folding of the construction from the closed position toward the aforementioned open position. A first of the side rails defines a channel member opening toward the second side rail and in which the rungs and at least the adjacent portions of the second side rail are receivable when the assembly is folded to its closed position.
REFERENCES:
patent: 258186 (1882-05-01), Winters
patent: 3414081 (1968-12-01), Wedvik
patent: 4037686 (1977-07-01), Shull
Jacobson Harvey B.
Ladder of Life, Inc.
Machado Reinaldo P.
O#Brien Clarence A.
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