Nozzle assembly and method of molding same

Claim 1

THE METHOD OF MAKING AN EXPANDING NOZZLE HAVING A FIRST ANNULAR INSERT OF EROSION RESISTANT MATERIAL AS ITS GAS ENTRY END, A SECOND ACIALLY SPACED ANNULAR INSERT OF LARAGER INTERNAL DIAMETER THAN THE FIRST INSERT FORMING AN ATTACHMENT RING AS ITS GAS EXIT END, AN INTERMEDIATE ANNULARA PORTION OF A PLASTIC MOLDING MATERIAL JOINING SAID INSERTS, SAID INTERMEDIATE ANNULAR PORTION HAVING A CONICAL INNER SURFACE AND INCLUDING A PORTION SURROUNDING THE FIRST INSERT AND A TRANSVERSE RUPTURE DIAPHRAGM OF A PLASTIC MOLDING MATERIAL EXTENDING ACROSS THE OPENING THROUGH THE LONGITUDINALLY INTERMEDIATE PORTION AT A POSITION IMMEDIATELY ADJACENT THE INNER END FACE OF THE FIRST ANNULAR INSERT, SAID LONGITUDINALLY INTERMEDIATE AND TRANSVERSE DIAPHRAGM PORTIONS BEING MADE OF PLASTIC HAVING THEROSETTING AND BONDING CHARACTERISTICS, SAID METHOD COMPRISING THE STEPS OF: (1) MAINTAINING SAID INSERTS IN PREDETERMINED SPACED RELATIONSHIP IN A MOLD, (2) INTRODUCING MOLDING MATERIAL INOT THE MOD AT THE AXIS OF THE NOZZLE AND THENCE FLOWING SAME OUTWARDLY IN ALL RADIAL DIRECTIONS THROUGH A SPACE SO SHAPED TO FORM SAID TRANSVERSE DIAPHRAGM AND AXIALLY LOCATED IN ALIGNMENT WITH THE INNER END FACE OF THE FIRST ANNULAR INSERT, AND THENCE FLOWING SAME IN OPPOSITE AXIAL DIRECTIONS TOWARD BOTH INSERTS INCLUDING FLOWING INTO A SPACE SURROUNDING THE FIRST INSERT, (3) SIMULTANEOUSLY APPLYING HEAT AND APPRECIABLE PRESSURE TO THE MOLD MATERIAL TO HARDEN SAME AND MOLDINGLY BOND SAME TO THE INSERT, (4) REMOVE THE COMPOSITE ARTICLE FROM THE MOLD, (5) MACHINING THE INNER SURFACE OF THE FIRST ANNULAR INSERT TO A SHAPE FORMING A CONTINUATION OF SAID CONICAL SURFACE.

Claim 2

THE METHOD OF MAKING AN EXPANDING NOZZLE HAVING A FIRST ANNULAR INSERT OF EROSION RESISTANT MATERIAL AS ITS GAS ENTRY END, A SECOND ACIALLY SPACED ANNULAR INSERT OF LARAGER INTERNAL DIAMETER THAN THE FIRST INSERT FORMING AN ATTACHMENT RING AS ITS GAS EXIT END, AN INTERMEDIATE ANNULARA PORTION OF A PLASTIC MOLDING MATERIAL JOINING SAID INSERTS, SAID INTERMEDIATE ANNULAR PORTION HAVING A CONICAL INNER SURFACE AND INCLUDING A PORTION SURROUNDING THE FIRST INSERT AND A TRANSVERSE RUPTURE DIAPHRAGM OF A PLASTIC MOLDING MATERIAL EXTENDING ACROSS THE OPENING THROUGH THE LONGITUDINALLY INTERMEDIATE PORTION AT A POSITION IMMEDIATELY ADJACENT THE INNER END FACE OF THE FIRST ANNULAR INSERT, SAID LONGITUDINALLY INTERMEDIATE AND TRANSVERSE DIAPHRAGM PORTIONS BEING MADE OF PLASTIC HAVING THEROSETTING AND BONDING CHARACTERISTICS, SAID METHOD COMPRISING THE STEPS OF: (1) MAINTAINING SAID INSERTS IN PREDETERMINED SPACED RELATIONSHIP IN A MOLD, (2) INTRODUCING MOLDING MATERIAL INOT THE MOD AT THE AXIS OF THE NOZZLE AND THENCE FLOWING SAME OUTWARDLY IN ALL RADIAL DIRECTIONS THROUGH A SPACE SO SHAPED TO FORM SAID TRANSVERSE DIAPHRAGM AND AXIALLY LOCATED IN ALIGNMENT WITH THE INNER END FACE OF THE FIRST ANNULAR INSERT, AND THENCE FLOWING SAME IN OPPOSITE AXIAL DIRECTIONS TOWARD BOTH INSERTS INCLUDING FLOWING INTO A SPACE SURROUNDING THE FIRST INSERT, (3) SIMULTANEOUSLY APPLYING HEAT AND APPRECIABLE PRESSURE TO THE MOLD MATERIAL TO HARDEN SAME AND MOLDINGLY BOND SAME TO THE INSERT, (4) REMOVE THE COMPOSITE ARTICLE FROM THE MOLD, (5) MACHINING THE INNER SURFACE OF THE FIRST ANNULAR INSERT TO A SHAPE FORMING A CONTINUATION OF SAID CONICAL SURFACE.