| US 6,239,407 C1 (7106th) | ||
| METHOD AND APPARATUS FOR RECEIVING A UNIVERSAL INPUT VOLTAGE IN A WELDING POWER SOURCE | ||
| James M. Thommes, Escondido, Calif., assignor to Illinois Tool Works, Inc., Glenview, Ill. | ||
| Reexamination Request Nos. 90/008,371, Feb. 5, 2007 and 90/009,051, Jun. 5, 2008. | ||
| Reexamination Certificate for Patent 6,239,407, issued May 29, 2001, Appl. No. 200,058, Nov. 25, 1998. | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H02M 5/458;5/00; |
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| U.S. Cl. 219—130.21 |
| AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT: |
| Claims 10, 16-18 and 21-23 are cancelled. |
| Claims 1, 2, 9, 11-13, 15, 19 and 20 are determined to be patentable as amended. |
| Claims 3-8 and 14, dependent on an amended claim, are determined to be patentable. |
| New claims 24-32 are added and determined to be patentable. |
| 1. A welding, cutting or heating power source capable of receiving a range of input voltages, comprising: an input rectifier configured to receive an ac input and to provide a first dc signal at a rectified magnitude;
a converter configured to receive the first dc signal and to provide a converter output and providing a dc bus at a desired magnitude, wherein the desired magnitude is greater than the rectified magnitude of a greatest input in the range of input voltages, and configured to receive at least one control input;
an output transformer configured to receive the converter output and to provide a third ac signal having a current suitable for welding, cutting or heating;
an output circuit configured to receive the third ac signal and to provide a welding signal; and
a controller, including a power factor correction circuit, configured to provide at least one control signal to the converter.
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