Patent ID: 6799395
Filing Date: 2004-10-05
Classification: E02D,E05F,E05Y

Abstract:
A horizontal door assembly having one or more door leafs comprising:a frame surrounding an opening, the frame having opposed vertical angular sidewalls connected by a header plate, the vertical angular sidewalls having a flat horizontal upper inwardly turned flange having an upper surface and a lower surface, an angular vertical sidewalls, and a bottom inwardly turned foundation flange; one or more door leafs hinged to the frame by a hinge for movement of the door leaf between an elevated open position and a closed position; a bracket mounted on the frame having one or more spaced through openings therein to accommodate a pivot pin; an elongated brace extending from the bracket to the foundation flange; and a pressure device having a rod rotatably coupled to a through opening in the bracket and a cylinder rotatably coupled to the door leaf, the pressure device resiliently urging the door leaf to its open position.