Electric heating – Metal heating – By arc
Reexamination Certificate
2006-05-11
2009-10-06
Paschall, Mark H (Department: 3742)
Electric heating
Metal heating
By arc
C219S121510, C219S075000, C313S231310
Reexamination Certificate
active
07598473
ABSTRACT:
The invention is generally directed to a nozzle for a plasma torch, the nozzle having a rear portion that defines at least a portion of a plasma chamber and a front portion that includes a first end and a second end. The first end is adjacent the rear portion, and the second end defines a plasma exit portion. One or more fluid passageways are disposed within the front portion and extend from the first end to the second end. The fluid passageways have passageway exit portions that provide one or more discrete jets of a secondary fluid to surround a plasma jet that is ejected from the plasma exit portion. Features of the invention include faster cutting, thicker workpiece piercing capability, reduced noise, improved arc stability, and increased consumable life, all of which improve productivity associated with plasma arc torch workpiece processing.
REFERENCES:
patent: 4954683 (1990-09-01), Hatch
patent: 5164568 (1992-11-01), Sanders
patent: 5208448 (1993-05-01), Everett
patent: 5451739 (1995-09-01), Nemchinsky et al.
patent: 6069339 (2000-05-01), McGrath et al.
patent: 6096992 (2000-08-01), Severance, Jr.
patent: 6118097 (2000-09-01), Kaga et al.
patent: 6172323 (2001-01-01), Ishide et al.
patent: 6610959 (2003-08-01), Carlson et al.
patent: 6667459 (2003-12-01), Woods et al.
patent: 6774336 (2004-08-01), Horner-Richardson et al.
patent: 6924004 (2005-08-01), Rao et al.
patent: 2001/0025833 (2001-10-01), Kelkar et al.
patent: 2002/0150669 (2002-10-01), Pui et al.
patent: 2004/0177807 (2004-09-01), Pui et al.
patent: 2005/0082263 (2005-04-01), Koike et al.
patent: 0941018 (1999-03-01), None
patent: 1395097 (2004-03-01), None
patent: 1524887 (2005-04-01), None
patent: 2703557 (1993-03-01), None
patent: 03/089178 (2003-10-01), None
patent: 2006/039890 (2006-04-01), None
Invitation to Pay Additional Fees from the International Searching Authority.
Cook David Jonathan
Duan Zheng
Liebold Stephen M.
Lindsay Jon W.
Hypertherm, Inc.
Paschall Mark H
Proskauer Rose LLP
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