Electric heating – Metal heating – By arc
Reexamination Certificate
2006-12-12
2006-12-12
Shaw, Clifford C. (Department: 1725)
Electric heating
Metal heating
By arc
Reexamination Certificate
active
07148449
ABSTRACT:
An electric arc welding system for creating a first AC welding arc with a first current waveform between a first electrode and a workpiece by a first power supply and a second AC welding arc with a second current waveform between a second electrode and a workpiece by a second power supply as the first and second electrodes are moved in unison along a welding path, where the first and second power supply each comprising a high speed switching inverter creating its waveform by a number of current pulses occurring at a frequency of at least 18 kHz with the magnitude of each current pulse controlled by a wave shaper and the polarity of the waveforms is controlled by a signal. The first AC waveform has a positive portion substantially different in energy than its negative portion and/or has either a different shape and/or a synthesized sinusoidal portion.
REFERENCES:
patent: 2673915 (1954-03-01), Steinert et al.
patent: 4485293 (1984-11-01), Tabata et al.
patent: 5220151 (1993-06-01), Terayama et al.
patent: 5278390 (1994-01-01), Blankenship
patent: 6111216 (2000-08-01), Stava
patent: 6177651 (2001-01-01), Reynolds et al.
patent: 6207927 (2001-03-01), Mita et al.
patent: 6207929 (2001-03-01), Stava
patent: 6291798 (2001-09-01), Stava
patent: 6472634 (2002-10-01), Houston
patent: 6847008 (2005-01-01), Myers et al.
patent: 3735834 (1989-04-01), None
patent: 1063044 (2000-12-01), None
patent: 56-111578 (1981-09-01), None
patent: 03-226377 (1991-10-01), None
patent: 10-328827 (1998-12-01), None
European Search Report, EP Application No. EP 04000826; dated Mar. 31, 2005; The Hague; Examiner H. Jaeger.
Houston William S.
Myers Russell K.
Fay Sharpe Fagan Minnich & McKee LLP
Lincoln Global Inc.
Shaw Clifford C.
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