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US 6,111,215 AGranted
Minature battery powered arc welder
OwnerLeslie G. Lillyinventor
Life of this patent
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Abstract
A hand carried, or hand-held, portable, arc welding apparatus. Designed to provide a variable square waveform welding current output. Powered by sealed high discharge rate, gel-cell, rechargeable batteries that, are sealed for safety. A new form of welding technology is provided for saving energy and making automated tack welds. A new self-diagnostic feature is provided for safe operation. A remote control option is provided as well as a way to control the heating and cooling of the weld. Duty cycle control and frequency control are provided for efficient control of the welding process.
Claims5
An arc welding apparatus comprising:
- a battery powered current source;
- a rod holder coupled to the current source;
- a duty cycle controller controlling the duty cycle of a pulsed current flowing from the current source and into the rod holder;
- a pulse weld controller controlling the flow of the pulsed current to the rod holder and causing the pulsed current to turn on and off at a fixed tack weld frequency;
- the tack weld frequency and duty cycle being independent of each other.
2 more elements
Dependencies are inferred from the claim text.