Electric ARC welder with background current
US7109437B2 · kind B2 · utility
3Cited by
4References
47Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2003 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Aug 24, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/091
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An electric arc welder comprising a power source driven by a main input transformer with a secondary winding creating an output pulsating current across the electrode and workpiece of a welding operation is provided with a background current circuit including a full-wave rectifier with AC input and a rectified DC output connected in parallel with the power source across the welding operation wherein the full-wave rectifier is connected in parallel with the secondary winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.