Fusion piercing or drilling machine

Claim 1

FUSING PIERCING APPARATUS COMPRISING: A KELLEY ROTATABLY MOUNTED IN A SUPPORT STRUCTURE AND CONTAINING FIRST CONDUIT MEANS FOR CONVEYING COMBUSTIBLE MATERIAL AND SECOND CONDUIT MEANS FOR CONVEYING A LIQUID COOLANT; A COMBUSTION HEAD SECURED TO SAID KELLY AND HAVING A MIXING CHAMBER AND AXIALLY OUTWARDLY FACING ORIFICES IN COMMUNICATION WITH SAID FIRST CONDUIT MEANS, AND COOLANT PASSAGES IN COMMUNICATION WITH SAID SECOND CONDUIT MEANS AND SURROUNDING SAID MIXING CHAMBER, SAID COOLANT PASSAGES BEING IN COMMUNICATION WITH AXIALLY EXTENDING PORTS FOR CONVEYING A PART OF THE LIQUID COOLANT TO THE ATMOSPHERE; A PLURALITY OF REAMERS SURROUNDING SAID COMBUSTION HEAD, SAID COMBUSTION HEAD BEING ADAPTED TO PRODUCE HIGH TEMPERATURE FLAMES AT SAID ORIFICES WHICH FLAMES IN COMBINATION WITH SAID REAMERS ARE ADAPTED TO PENETRATE HARD ORES; AND A COOLANT PASSAGE PROVIDED WITHIN EACH OF SAID REAMERS HAVING AN INLET PORT INCOMMUNICATION WITH AT LEAST ONE OF SAID COOLANT PASSAGES OF SAID COMBUSTION HEAD AND HAVING AN OUTLET PORT TO THE ATMOSPHERE TO THEREBY CONVEY A PART OF THE LIQUID COOLANT DIRECTLY TO THE ATMOSPHERE THROUGH THE REAMER.