Aspirating nozzle

Claim 1

AN ASPIRATING NOZZLE COMPRISING IN SERIES COAXIAL FIRST SWIRL CHAMBER MEANS AND FORWARD SWIRL CHAMBER MEANS, EACH OF SAID SWIRL CHAMBER MEANS BEING ENCLOSED AND HAVING A CURVED WALL TO PROVIDE A SUBSTANTIALLY CIRCULAR CROSS SECTION, AXIAL DISCHARGE OPENING MEANS AT THE FORWARD END OF EACH OF SAID SWIRL CHAMBER MEANS THE NARROWEST PORTION OF WHICH CONSTITUTES DISCHARGE ORIFICE MEANS, OPENING MEANS FOR SWIRLING AT THE REAR OF EACH SWIRL CHAMBER MEANS ADAPTED FOR ADMISSION OF SWIRLING PRESSURIZED GAS TO EACH SWIRL CHAMBER MEANS, EACH OPENING MEANS FOR SWIRLING IN SAID NOZZLE ASSOCIATED WITH TUBULAR DUCT MEANS EXTENDING AXIALLY FROM THE REAR OF THE SWIRL CHAMBER MEANS AND TERMINATING WITH TUBULAR DUCT AXIAL OPENING MEANS AT AN INTERMEDIATE AXIAL POSITION IN THE SWIRL CHAMBER MEANS BETWEEN THE OPENING MEANS FOR SWIRLING AND SAID DISCHARGE ORIFICE MEANS, THE TUBULAR DUCT TERMINATING IN EACH FORWARD SWIRL CHAMBER MEANS ORIGINATING AT THE DISCHARGE ORIFICE OF THE SWIRL CHAMBER TO ITS REAR, THE DIAMETER OF THE DISCHARGE ORIFICE MEANS IN A SWIRL CHAMBER BEING LARGER THAN THE INTERNAL DIAMETER OF THE TUBULAR DUCT MEANS TERMINATING IN THAT SWIRL CHAMBER, THE WALL SURFACE OF EACH SWIRL CHAMBER MEANS CONVERGING SUBSTANTIALLY CONICALLY FROM A POSITION TO THE REAR OF THE AXIAL TERMINUS OF THE TUBULAR DUCT MEANS THEREIN TO ITS DISCHARGE ORIFICE MEANS, THE OUTER SURFACE OF EACH TUBULAR DUCT MEANS HAVING THE CONFIGURATION OF A CYLINDER OVER SUBSTANTIALLY ITS ENTIRE LENGTH, SAID FIRST SWIRL CHAMBER BEING FREE OF MEANS FOR IMPARTING SWIRLING TO A FLUID FLOWING FROM THE TUBULAR DUCT MEANS TERMINATING THEREIN, EACH SWIRL CHAMBER MEANS HAVING REAR ENCLOSURE MEANS EXTENDING BETWEEN THE EXTERIOR OF THE TUBULAR DUCT MEANS TERMINATING THEREIN AND ITS CURVED SWIRL CHAMBER WALL SURFACE SO THAT EACH SWIRL CHAMBER MEANS IS SUBSTANTIALLY COMPLETELY ENCLOSED AT THE REAR THEREOF, EACH OPENING MEANS FOR SWIRLING EXTENDING THROUGH NOT MORE THAN A MINOR PROPORTION OF THE SURFACE OF THE REAR WALL OF ITS SWIRL CHAMBER MEANS, EACH OPENING MEANS FOR SWIRLING DISPOSED ONLY AT THE CONVERGING CONICAL WALL SURFACE OF ITS SWIRL CHAMBER LATERALLY REMOTE FROM ITS ASSOCIATED TUBULAR DUCT MEANS AND REARWARDLY WITH RESPECT TO THE AXIAL TERMINUS OF ITS ASSOCIATED TUBULAR DUCT MEANS, EACH OPENING MEANS FOR SWIRLING DIRECTED INTO ITS SWIRL CHAMBER MEANS IN BOTH A FORWARDLY AND SUBSTANTIALLY TANGENTIAL DIRECTION WITH RESPECT TO ITS CONICAL SWIRL CHAMBER WALL SURFACE ADAPTED FOR THE ADMISSION TO EACH SWIRL CHAMBER MEANS OF A SWIRLING PRESSURIZED GAS IN BOTH A FORWARDLY AND SUBSTANTIALLY TANGENTIAL DIRECTION WITH RESPECT TO THE CONICAL SWIRL CHAMBER WALL SURFACE THEREOF.