Patent ID: 7247089

Claim:
An apparatus for automatic airflow damping, the apparatus comprising: an enclosure configured for positive air pressure and comprising an orifice configured to pass air, the orifice disposed in a vertical plane of an outer wall of the enclosure; an orifice cover configured to pivot about a lower edge and having an open position configured to permit airflow though the orifice wherein the orifice cover is horizontally disposed and a closed position wherein the orifice cover is vertically disposed and configured to block airflow from exiting through the orifice while the orifice cover is in the closed position; a cover actuator configured to move the orifice cover from the open position to the closed position in response to removal of an air moving device; and a seal disposed on the orifice cover and comprising a layer of elastomeric material and configured to block airflow between the enclosure and the orifice cover while in the closed position and allowing the orifice cover to pivot to the open position.