Electric heating – Metal heating – By arc
Reexamination Certificate
2006-04-18
2006-04-18
Paschall, Mark (Department: 3742)
Electric heating
Metal heating
By arc
C219S121520, C219S121490, C219S075000
Reexamination Certificate
active
07030336
ABSTRACT:
An improved anode element for a plasma generator is comprised of an anode body having a central bore therein. A plurality of arc attachment regions are formed along a surface of the central bore. Each attachment is configured to provide a substantially radially predefined attachment point for an electrical arc extending between the attachment region and a respective cathode when the anode element is used in a plasma generator. The arc attachment points can be areas along the central bore which are elevated or proud relative to adjacent areas. The attachment points can also be defined at least in part by asymmetrical cooling of the anode.
REFERENCES:
patent: 3597650 (1971-08-01), Anderson et al.
patent: 5298835 (1994-03-01), Muehlberger et al.
patent: 5901551 (1999-05-01), Butler
patent: 6114649 (2000-09-01), Delcea
patent: 2003/0201257 (2003-10-01), Crawmer
Hogan & Hartson L.L.P.
Paschall Mark
Sulzer Metco (US) Inc.
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