Air-tight doors equipped with inflatable seals

Claim 1

FOR AN AIR-TIGHT DOOR SYSTEM, COMPRISING A SOURCE OF FLUID UNDER PRESSURE, A MOVABLE PANEL, A FIXED FRAME, A SEAL INTERPOSED THEREBETWEEN AND INFLATABLE BY SAID FLUID, LOCKING MEANS BIASED IN THE LOCK POSITION, AND DRIVING MEANS ACTUATED BY SAID FLUID FOR MOVING SAID PANEL BETWEEN A CLOSED POSITION AND AN OPEN POSITION, AN OPERATING ASSEMBLY COMPRISING, IN COMBINATION, UNLOCKING MEANS ACTUATED BY SAID FLUID FOR UNLOCKING SAID LOCKING MEANS, MEANS FOR DISTRIBUTING SAID FLUID ALTERNATIVELY TO SAID SEAL AND SAID FLUID ACTUATED UNLOCKING MEANS; MEANS FOR INTERRUPTING SAID FLUID DISTRIBUTION TO SAID SEAL; AND, EXTENDING FROM SAID DISTRIBUTING MEANS, AN INFLATING CIRCUIT LEADING TO SAID INFLATABLE SEAL THROUGH SAID INTERRUPTING MEANS; A DRIVING CIRCUIT LEADING TO SAID DRIVING MEANS AND AN UNLOCKING CIRCUIT LEADING TO SAID FLUID ACTUATED MEANS, WHEREBY SAID INTERRUPTING MEANS CONTROL SAID INFLATING CIRCUIT TO PREVENT INFLATION OF SAID SEAL EXCEPT WHEN SAID PANEL IS LOCKED INTO SAID CLOSED POSITION AND TO PREVENT OPENING OF THE SAID PANEL BEFORE DEFLATION OF THE SEAL.