Torch apparatus

Claim 2

Torch head apparatus comprising a torch head having a torch head bore, a gas mixer removably mounted on said torch head bore, said mixer having a substantially planar torch tip seating end surface, a cutting oxygen passageway opening through said end surface, and a plurality of preheat oxygen-fuel gas passageways opening through said end surface radially outwardly of the opening of the mixer cutting oxygen passageway through said end surface and spaced angular relative the cutting oxygen passageway opening, said torch head having passageways for conducting cutting oxygen, and preheat oxygen and fuel gas to the respective mixer passageway, an axially elongated tip having a substantially planar end surface portion seatable against said mixer end surface and an opposite end and means mountable on the head and the torch tip for releasably retaining the tip surface portion in fluid sealing relationship with the mixer end surface, said tip surface portion having an annular groove opening to the mixer oxygen-fuel gas passageways, said tip having a plurality of angular spaced oxygen-fuel gas passageways opening to said groove and through the opposite end of the tip, a cutting oxygen bore opening through said surface portion to the mixer cutting oxygen passageway and through said opposite end, and annular surfaces on opposite sides of groove that are in a common plane and are seatable against the mixer planar end surface in fluid sealing relationship relative thereto.

Claim 3

The apparatus of claim 1 further characterized in that said groove has an axial length of about 0.010 to 0.100 inch.

Claim 4

The apparatus of claim 1 further characterized in that said end surface portion comprises an enlarged diametric first portion having the tip annular surfaces, that said tip has a second diametric portion of a smaller diameter than said first portion and joined to said first portion to form a shoulder, and that said means comprises a collar fixedly secured to the tip and having a main body annular portion seatable against said shoulder and an axially extending flange integrally joined to said body portion and extending axially away from said shoulder a greater distance and in the same direction that said first portion extends axially away from said shoulder to recess said tip annular surfaces relative the flange and means for removably mounting the collar on the torch head.

Claim 5

The apparatus of claim 3 further characterized in that the torch head bore has an annular end flange, that the mixer has an enlarged diametric flange adjacent its tip seating surface that has s frustoconical tapered surface adjacent the torch head end flange that tapers radially inwardly and axially toward the mixer tip seating surface and is of a smaller outside diameter than the inside diameter of said flange and that a resilient gasket is provided between the torch head end flange and the tapered surface.

Claim 6

The apparatus of claim 1 further characterized in that said groove has an outside diameter in the range of about 0.450 to 0.550 inch and an inside diameter in the range of about 0.240 to 0.280 inch.

Claim 7

The apparatus of claim 5 further characterized in that the groove has an axial depth in the range of about 0.010 to 0.100 inch, that there are provided 5 to 9 mixer oxygen-fuel gas passageways each having a diameter in the range of about 0.030 to 0.060 inch, and that the diameter of the mixer adjacent the mixer fuel gas passageways opening to the torch head bore is about 0.600 to 0.620 inch.

Claim 8

For torch head apparatus having a torch head, a mixer that has a generally planar first torch tip seating surface, a cutting oxygen passageway opening through the central portion of the first surface and a plurality of preheat oxygen-fuel gas passageways opening through said first surface angularly spaced relative the mixer cutting oxygen passageway and radially spaced therefrom and torch tip mounting means to removably mount a torch tip, an axially elongated torch tip having a central cutting oxygen bore extending axially therethrough, a mixer seating surface end first portion of a given diameter, a reduced diameter second portion integrally joined to the first portion to form an annular shoulder shoulder therewith, and an opposite end portion, and a collar pressure fitted on the second portion in abutting relation to said shoulder and adapted to be removably held on the torch head by the mounting means, said collar having a flange extending axially in the same direction that the first portion extends axially away from said shoulder and radially spaced from said shoulder, and a generally planar surface between the collar flange and the tip, said flange having an annular edge, said first portion having an annular gas distributing groove surrounding the cutting oxygen bore and spaced therefrom and having annular surfaces in a common plane with the groove radially therebetween, said first portion annular surfaces being abuttable against the first seating surface to form a fluid seal therewith, the axial dimension of the first portion being sufficiently less than the corresponding dimension of said flange to recess the tip annular surfaces relative the collar flange annular edge, said tip having a plurality of angular spaced oxygen-fuel gas passageways that at their one ends open to said groove and at their opposite ends open through said opposite end portion.

Claim 9

For torch head apparatus having a torch head, a mixer that has a generally planar first torch tip seating surface, a cutting oxygen passageway opening through the central portion of the first surface and a plurality of preheat oxygen-fuel gas passageways opening through said first surface angularly spaced relative the mixer cutting oxygen passageway and radially spaced therefrom and torch tip mounting means to removably mount a torch tip, an axially elongated torch tip having a central cutting oxygen bore extending axially therethrough, a mixer seating surface end first portion of a given diameter, a reduced diameter second portion integrally joined to the first portion to form an annular shoulder shoulder therewith, and an opposite end portion, and a collar pressure fitted on the second portion in abutting relation to said shoulder and adapted to be removably held on the torch head by the mounting means, said collar having a flange extending axially in the same direction that the first portion extends axially away from said shoulder and radially spaced from said shoulder, and a generally planar surface between the collar flange and the tip, said flange having an annular edge, said first portion having an annular gas distributing groove surrounding the cutting oxygen bore and spaced therefrom and having annular surfaces in a common plane with the groove radially therebetween, said first portion annular surfaces being abuttable against the first seating surface to form a fluid seal therewith, the axial dimension of the first portion being sufficiently less than the corresponding dimension of said flange to recess the tip annular surfaces relative the collar flange annular edge, said tip having a plurality of angular spaced oxygen-fuel gas passageways that at their one ends open to said groove and at their opposite ends open through said opposite end portion.