Fire escape – ladder – or scaffold – Wall- or floor-attached – Ladder
Patent
1997-10-15
1999-02-16
Chin-Shue, Alvin
Fire escape, ladder, or scaffold
Wall- or floor-attached
Ladder
182 70, 182163, E06C 910
Patent
active
058710671
ABSTRACT:
The present invention is a collapsible, folding emergency escape ladder having an attachment means for permanently affixing it to a window frame rough opening structural components that are present within the walls of all residential housed, a retention means for securing the ladder in the folded position, and a multiplicity of swivel link means for joining the multiplicity of ladder sections to one another. The attachment means for permanently affixing the emergency escape ladder to a window sill includes a rigid framework having attachment bolts/screws apertures disposed therein at predetermined locations that line up with the inner wall structural framework found surrounding windows in most, if not all, residential dwellings. The retention means for securing the ladder in the folded position includes a pin arrangement that may cooperate with a chain for gathering the collapsed foldable sections in a compact area next to the rigid framework attachment means. A preferred embodiment of the invention dispenses with the need for the gathering chain. Both embodiments are operated by the simple release of a pin thereby allowing a panic-stricken escapee simplicity and ease of deployment. The multiplicity of swivel link means for joining the multiplicity of ladder sections to one another are discreet lengths having apertures that line up and cooperate with apertures disposed in the side rails of individual ladder sections such that a free deployment rotation occurs between individual ladder sections in a vertical direction while eliminating swivel motion between individual ladder sections in all other directions except vertical. Another preferred embodiment of the invention utilizes curvature of the top portion of the top ladder section to form an enlarged bent hook to be used as hand rails during the initial descent from the window frame to the ladder.
REFERENCES:
patent: 60731 (1867-01-01), Hovey
patent: 293153 (1884-02-01), Downing
patent: 1203313 (1916-10-01), Danke
patent: 4754843 (1988-07-01), Hudenson
patent: 5022491 (1991-06-01), Gill
Chin-Shue Alvin
Hillman James P.
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