Foam plug generator

Claim 1

IN APPARATUS FOR GENERATING A HIGHLY EXPANDED FIREFIGHTING FOAM PLUG, THE COMBINATION OF A WIND TUNNEL; A FOAM FORMING NET AT ONE END OF SAID TUNNEL; AN ASPIRATOR AT THE OTHER END OF SAID TUNNEL HAVING A HIGH TOTAL AIR TO PRIMARY AIR RATIO AND INCLUDING AN UNOBSTRUCTED AIR ENTRAINING TUBE HAVING AN INLET AT ONE END AND AN OUTLET AT THE OTHER END FACING SAID NET FOR DELIVERING A LARGE VOLUME OF AIR INTO SAID TUNNEL WHICH FLOWS TOWARDS SAID NET, AND NOZZLE MEANS AT SAID INLET FOR DIRECTING GASEOUS MEDIUM UNDER PRESSURE INTO SAID TUBE TO EFFECT AIR ENTRAINMENT; SPRAY MEANS IN SAID TUNNEL BETWEEN SAID NET AND SAID ASPIRATOR FOR DIRECTING ONTO SAID NET A SOLUTION CONTAINING A FOAMING AGENT, WHEREBY THE AIR DELIVERED INTO SAID TUNNEL CAUSES THE SOLUTION DEPOSITED ON SAID NET TO FOAM AND GENERATE THE FOAM PLUG; A SOURCE OF FOAMING SOLUTION; FIRST CONDUIT MEANS CONNECTING SAID SOURCE OF SOLUTION TO SAID SPRAY MEANS; SECOND CONDUIT MEANS CONNECTING SAID SOURCE OF GASEOUS MEDIUM TO SAID NOZZLE MEANS AND TO SAID SOURCE OF SOLUTION FOR APPLYING A PRESSURE HEAD ON THE SOLUTION TO EXPEL THE SAME FROM SAID SOURCE; AND PRESSURE REGULATING MEANS IN SAID SECOND CONDUIT MEANS UPSTREAM OF SAID NOZZLE MEANS AND SAID SOURCE OF SOLUTION FOR REDUCING THE PRESSURE OF THE GASEOUS MEDIUM.