The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 1999
Filed:
Oct. 20, 1997
William Cannon Gardner, Casselberry, FL (US);
Stephen Thomas Soto, Winter Park, FL (US);
Siemens Westinghouse Power Corporation, Orlando, FL (US);
Abstract
A method for repairing stress-induced cracks in a generator rotor keyway is disclosed. The method comprises disassembling the retaining ring and ring key from the rotor, and machining away the crack and surrounding rotor metal from the rotor keyway. The machining step may be performed in a lathe or milling machine. This method diminishes the labor cost, equipment cost, and down time required for crack repairs because the slot contents may remain in the slots during the entire repair process. A spacer ring and an enlarged key that may be inserted into the machined, enlarged keyway are also disclosed.