Patent ID: 6460654
Filing Date: 2002-10-08
Classification: E06C

Abstract:
A collapsible escape ladder comprising:an attaching member, said attaching member for attaching said escape ladder over a window sill of a building; multiple ladder rungs, each formed with an elongated first portion and at least two integral stand-off projections, said two integral stand-off projections extending transverse to the longer dimension of the first portion at opposite ends thereof in the longer dimension, said first portion having a thickness and cross-section so as to enable the multiple ladder rungs to nest when stacked in the collapsed state, each rung being formed of linear segments that are stamped from sheet metal so as to form rungs having a flat top surface and side surfaces that extend downward and outward and have an integral stand-off projection that extends from near each rung end, said multiple ladder rungs being identically shaped; a webbing support that is made of fire-resistant material, the width of the webbing support being about 1 inch and the thickness about &frac18; inch, said webbing support attached to each rung by being riveted, there being a rivet near each rung end, wherein one head of the rivet directly engages the webbing support and the other head of the rivet directly engages the rung, the webbing support being oriented so that the width dimension of the webbing support is transverse to the length dimension of the rungs, thereby enabling the webbing support to be folded inward toward the center of each rung when the ladder is in the collapsed state.