Patent ID: 7913711

Claim:
A door assembly for use with a shelter, wherein the shelter comprises an outer frame assembly comprising a plurality of intercoupled members forming a coverable structure and a cover for covering the outer frame assembly, wherein the door assembly comprises: a door frame comprising a plurality of intercoupled members, wherein one of the intercoupled members of the door frame is a first upright having a first end and a second end and wherein another of the intercoupled members of the door frame is a second upright having a first end and a second end, wherein the first upright and the second upright each have a channel; a retractable door arrangement coupled to the door frame, wherein the retractable door arrangement comprises a door comprised of flexible material that can be extended to enclose the shelter or retracted to provide an opening into the shelter, and wherein the retractable door arrangement comprises an alignment rail assembly having a first member having a first end insertable within the channel of the first upright and a second member having a first end insertable within the channel of the second upright and wherein the alignment rail assembly is intermediate and slidable along the first upright and the second upright; and wherein the first member and the second member are independently rotatable relative to each other thereby facilitating the extension and retraction of the door even when the first upright is out of the at least essentially vertical alignment with the second upright.