Patent ID: 6662902
Filing Date: 2003-12-16
Classification: E04G,E06C

Abstract:
A safety ladder scaffold in combination with and attached to a pair of ladders by a ladder jack installed on each ladder, said ladder jacks adapted for supporting the scaffold in an elevated horizontal position intermediate the two spaced apart ladders resting on the ground and leaning against a generally flat wall surface, comprising:a plank assembly attached to said ladder jacks, said plank assembly being comprised of a metallic plank having an upper surface and a lower surface, said surfaces adapted to be lying in planes positioned horizontally and parallel with respect to the ground, said plank having a first long edge and a second long edge, said first long edge adapted to be nearest to the wall surface, said plank having a first lateral end opposite a second lateral end, said lateral ends defining a longitudinal axis of the plank, said plank longitudinal axis adapted to be lying horizontally parallel to said wall surface, said first long edge having a downwardly extending first flange terminating in an inward second flange extending toward the second long edge and having a plane parallel to the plank lower surface, said second flange extending approximately half way beneath said plank, said second long edge having a downwardly extending first flange terminating in an outward second flange extending away from the plank at an approximate 90Â° angle with the first flange, said second flange having a plane parallel with the plane of the plank lower surface, said second flange terminates in a third flange extending upwardly away from the second flange at an approximate 90Â° angle, said third flange having a plane parallel with the plane of the first flange, said three flanges forming a rectangular channel with the first and third flanges forming vertical sides, the second flange forming a horizontal bottom, and the channel having an open top, said second long edge first flange having an elongated, horizontal, central aperture formed therein, said aperture having a longitudinal axis parallel to the longitudinal axis of the plank, said second long edge third flange having an elongated, horizontal, central aperture formed therein, said aperture having a longitudinal axis parallel to the longitudinal axis of the plank, said apertures being parallel to each other; a back support attached to said plank assembly, comprising: a lower engagement portion comprising: a rectangular box having a top surface, bottom surface, two interconnecting, opposing parallel sides, and two opposing, parallel ends, said ends defining a box longitudinal axis, said box longitudinal axis being parallel to the longitudinal axis of the plank, wherein the box is adapted to fit into the said plank assembly channel, said box sides being positioned adjacent the second long edge first and third flanges, said box bottom surface being adjacent the second long edge second flange; and a plurality of side pins extending through each of the box sides, said side pins protruding from the sides and engaging the second long edge first and third flange apertures; an upper portion comprised of: a vertical post extending upwardly from the lower engagement portion box top surface; a sleeve slidably affixed to said post; a curved waist grip attached to the sleeve.