Patent ID: 7900398

Claim:
A revolving security door system comprising: a substantially arcuate drum defining an enclosure and opposed openings; a revolving door disposed for rotation within said enclosure including plural radially extending door wings and a center shaft; a secure zone within said enclosure extending substantially from an edge of a part of said enclosure defining, in part, a first one of said openings disposed on a non-secure side of said door system and toward an edge of said enclosure defining, in part, a second one of said openings disposed on a secure side of said door system; first sensing means detecting at least one of an intruder or object moving into said zone from said first opening and causing said door to cease rotation but allow the intruder to exit from said secure zone by said first opening; second sensing means sensing the presence of an object remaining within said zone; and door locking means for closing and locking said revolving door, said door locking means coordinating use of said first sensing means with said second sensing means to distinguish between intruders and objects within said secure zone, said door locking means closing and locking said revolving door in response to indication by said second sensing means of the object remaining within said secure zone only if said first sensing means indicates that the intruder has not remained within said secure zone.