Patent ID: 6289963
Filing Date: 2001-09-18
Classification: E05D,E05F,E05Y,E06B

Abstract:
A dual closure system for overhead doors in a structure having a floor, a vertical wall, a ceiling structure, and a rectangular door opening in the wall extending from the floor upwardly in a direction towards the ceiling structure, comprising,a pair of spaced tracks having a vertical segment extending upward from the floor adjacent vertical sides of the door opening, and terminating through curved track segments into a pair of vertically spaced horizontal upper and lower track portions,the curved track segments both having lower ends arcuately merging into alignment with an upper end of the vertical segments of tracks, and upper ends terminating in the vertically spaced horizontal track portions,first and second foldable doors having sets of rollers in their side edges movably mounted one each in the horizontal portions of the track so each door can be individually moved into a vertical position in the vertical segment of the tracks, anda drive means extending horizontally and spaced between horizontal planes of the spaced horizontal upper and lower track portions, the drive means being operatively connected to the first and second doors for selective movement of either door to a vertical position in the vertical segments of the tracks.