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:
Jul. 09, 2002
Filed:
May. 19, 2000
Applicant:
Inventors:
Robert M. Schurter, Colgate, WI (US);
Robert J. Heideman, Kewaskum, WI (US);
Vaughn A. DeVorse, New Berlin, WI (US);
Assignee:
A. O. Smith Corporation, Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 1/22 ;
U.S. Cl.
CPC ...
H02K 1/22 ;
Abstract
A rotor in which shaft portions are welded directly to the ends of a rotor stack by friction welding, which eliminates the need for a shaft hole in the rotor stack, thus providing a rotor in which each lamination has an unstamped, solid center, and the rotor has no other bores therein. As a result, no scrap is generated and motor efficiency is improved because the rotor has no bores therein. In addition, the amount of shaft material needed is also reduced because the shaft does not extend through the rotor stack.