Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2005-09-13
2005-09-13
Tugbang, A. Dexter (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S596000, C029S597000, C029S402050, C029S402060, C029S402070, C029S402080, C310S215000, C310S261100, C310S270000, C310S271000
Reexamination Certificate
active
06941639
ABSTRACT:
An improved generator rotor (30) and a method of repairing an existing generator rotor (12) are disclosed. Methods consistent with the present invention provide techniques for repairing existing stress-damaged rotors (12) to remove stress-induced cracks (29), without requiring new retaining rings (16), to significantly extend the useful life of a generator without the cost and complexity of conventional repair techniques. Improved generator rotors (30) consistent with the present invention provide a tooth-top design that is more resistant to stress-induced cracking than conventional designs, resulting in new generators with longer useful lives.
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Gardner W C, “Generator Rotor Long Ring Modifications Without Rewinds”, Proceedings of the 57th American Power Conference, vol. 2, 1995, pp. 1000-1004, XP001155376, Chicago, USA.
Gardner William Cannon
Light Kevin
Whitener Randy Edward
Zhang Jiping
Phan Tim
Siemens Westinghouse Power Corporation
Tugbang A. Dexter
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