Patent ID: 7637060

Claim:
A shelter having at least one lift door for access comprising in combination: a. a shelter comprising at least one door having a generally vertical door panel and a roof panel fixedly attached to an upper edge of said vertical door panel and extending generally inwardly toward the center of a top of the shelter, and a hinge attaching an inner edge of said roof panel to the top of the shelter, and b. at least one jack fixedly attached in a vertical position for providing continuous vertical lift forces to open said door, and continuous vertical supporting forces while closing said door, and c. at least one brace member extending from the proximity of a lower edge of said vertical door panel to the proximity of the inner edge of said roof panel, said brace member having a portion adapted as a track for receiving a truck traversing said track, said truck being attached to a distal end of an arm extending from a moving portion of said jack to the vicinity of said brace member, and d. whereby, when said jack is raised vertically, said truck rises concurrently and travels along said track continuously lifting and, thereby causing said door to be opened by pivoting on said hinge.