Electric heating – Metal heating – By arc
Reexamination Certificate
2005-06-07
2005-06-07
Paschall, Mark (Department: 3742)
Electric heating
Metal heating
By arc
C219S121520, C219S121500, C219S121590, C219S075000
Reexamination Certificate
active
06903301
ABSTRACT:
A contact start plasma arc torch is provided that comprises an electrode, a tip, and an initiator that is resiliently biased into contact with the tip, the initiator being movable against the resilient bias to separate from the tip and establish a pilot arc between the initiator and the tip. The initiator is disposed within a start cartridge, which preferably comprises a coil spring that biases the initiator into contact with the tip. The plasma arc torch further comprises a plurality of head vent holes to vent gas from within the start cartridge during operation of the torch. Additionally, the tip defines a plurality of swirl holes and secondary gas holes to generate and control a plasma stream that is subsequently blown from a central exit orifice in the tip.
REFERENCES:
patent: 3832513 (1974-08-01), Klasson
patent: 4567346 (1986-01-01), Marhic
patent: 4902871 (1990-02-01), Sanders et al.
patent: 4940877 (1990-07-01), Broberg
patent: 5796067 (1998-08-01), Enyedy et al.
patent: 5886315 (1999-03-01), Lu et al.
patent: 5897795 (1999-04-01), Lu et al.
patent: 5994663 (1999-11-01), Lu
patent: 6084199 (2000-07-01), Lindsay et al.
patent: 6163008 (2000-12-01), Roberts et al.
patent: 6403915 (2002-06-01), Cook et al.
Chen Shiyu
Hewett Roger W.
Horner-Richardson Kevin D.
Jones Joseph P.
Harness & Dickey & Pierce P.L.C.
Paschall Mark
Thermal Dynamics Corporation
LandOfFree
Contact start plasma arc torch and method of initiating a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Contact start plasma arc torch and method of initiating a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contact start plasma arc torch and method of initiating a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3488803