Metallurgical apparatus – Means for cutting solid metal with heat – e.g. – blowpipes – Means for removing surface material – e.g. – scarfing
Reexamination Certificate
2004-04-22
2008-10-14
Kastler, Scott (Department: 1793)
Metallurgical apparatus
Means for cutting solid metal with heat, e.g., blowpipes
Means for removing surface material, e.g., scarfing
C266S055000, C148S201000, C148S202000
Reexamination Certificate
active
07435373
ABSTRACT:
A method and apparatus for removing burrs from inside slotted metal liners exposes the burrs to a high-intensity gas flame that effectively oxidizes or incinerates the burrs, without inducing undesirable temperature levels in the parent metal of the slotted liner. This is accomplished using a torch head assembly having multiple gas torch nozzles disposed radially around the circumferential perimeter of the torch head, such that when the torch head is passed through the interior of a slotted liner, the flames are directed toward the interior surface of the liner. Auxiliary oxygen is introduced at the nozzle outlets, resulting in a large increase in flame velocity and intensity and, in turn, an increase in the flame temperature. The auxiliary oxygen may be introduced through annular passages surrounding the nozzles, such that the auxiliary oxygen effectively forms a cylindrical curtain surrounding the flame at each nozzle.
REFERENCES:
patent: 4035604 (1977-07-01), Meleka et al.
patent: 4340163 (1982-07-01), Romashov et al.
patent: 4600180 (1986-07-01), Abbey, III
patent: 356099016 (1981-08-01), None
“Thermal Energy Deburring” Article from internet website: claymore.engineer.gvsu.edu/˜rutgersj/reas.html, printed Nov. 25, 2002, 2 pages.
Kastler Scott
Regent Technologies Ltd.
Tomkins Donald V.
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