Electric heating – Metal heating – By arc
Reexamination Certificate
2004-11-16
2008-05-20
Hoang, Tu Ba (Department: 3742)
Electric heating
Metal heating
By arc
C219S121480, C219S121530, C219S121540, C219S121550, C219S121590
Reexamination Certificate
active
07375302
ABSTRACT:
An electrode for a plasma arc cutting torch which minimizes the deposition of high emissivity material on the nozzle, reduces electrode wear, and improves cut quality. The electrode has a body having a first end, a second end in a spaced relationship relative to the first end, and an outer surface extending from the first end to the second end. The body has an end face disposed at the second end. The electrode also includes at least one passage extending from a first opening in the body to a second opening in the end face.
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International Search Report for PCT/US2005/039743, date of mailing Dec. 5, 2006 (25 pages).
Altobelli Bruce P.
Bouthillier David L.
Cook David J.
Hackett Charles M.
Twarog Peter J.
Hoang Tu Ba
Hypertherm, Inc.
Proskauer Rose LLP
Ralis Stephen J.
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