Patent ID: 8499494

Claim:
A device for securely controlling passage between two or more locations, comprising: an entryway that controls said passage in a unidirectional traffic flow, said traffic flow being unidirectional at any particular moment in time, said entryway having a first sidewall and a second sidewall, wherein the first and second sidewalls are each linear and are parallel to one another; first and second moveable and rotatable door panels positioned between the linear portions of the first and second sidewalls; and wherein each door panel is linearly moveable in a direction of said traffic flow while being positioned perpendicular with respect to the first and second sidewalls, wherein after moving in the direction of traffic flow each door panel reaches a first point along said entryway and rotates into a position parallel to and moves adjacent one of the first and second sidewalls, wherein upon having rotated and moved, each door panel moves in a direction opposite to said traffic flow until said panel reaches a second point along said entryway; wherein upon having reached the second point, each door panel moves away from the one of the first and second sidewalls and rotates into a position perpendicular with respect to the first and second sidewalls and is again linearly moveable in the direction of said traffic flow while being positioned perpendicular with respect to the first and second sidewalls; and wherein at a first point in time the first and second door panels are parallel to one another and at a second point in time the first and second door panels are perpendicular to one another.