Patent ID: 7424935

Claim:
A door assembly for an elevator, the elevator comprising a cab having a cab entry, the elevator further comprising an elevator shaft having an upper shaft entry and a lower shaft entry, the door assembly comprising: (a) first, second, and third ladder frames, each ladder frame having proximal and distal ends, and comprising a plurality of roller carrying rungs and a door assembly support rung positioned proximally from said each ladder frame's plurality of roller carrying rungs, said each ladder frame further comprising rail means spanning between and rigidly interconnecting said each ladder frame's roller carrying rungs and door assembly support rung, the first ladder frame overlying and extending longitudinally outwardly from the elevator's cab entry, the second ladder frame overlying and extending longitudinally inwardly from the elevator's upper shaft entry, and the third ladder frame overlying and extending longitudinally inwardly from the elevator's lower shaft entry; (b) first, second, and third pluralities of rollable trolleys respectively mounted upon the first, second, and third ladder frame's pluralities of roller carrying rungs; and (c) first, second, and third pluralities of door panels respectively suspending from the first, second, and third pluralities of rollable trolleys; and (d) a first pair of pluralities of longitudinally aligned bolt receiving apertures, a second pair of pluralities of longitudinally aligned bolt receiving apertures, and a third pair of pluralities of longitudinally aligned bolt receiving apertures, the first, second, and third pairs of pluralities of longitudinally aligned bolt receiving apertures respectively extending through the first, second, and third ladder frames' rungs, the first, second, and third ladder frame's rail means respectively comprising first, second, and third pairs of bolt and spacer sleeve combinations, said pairs of bolt and spacer sleeve combinations respectively extending through the first, second, and third pairs of pluralities of longitudinally aligned bolt receiving apertures.