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. 18, 2008
Filed:
Mar. 21, 2005
Greg P. Cervenka, Houston, TX (US);
Forrest M. Martino, Houston, TX (US);
Greg P. Cervenka, Houston, TX (US);
Forrest M. Martino, Houston, TX (US);
National-Oilwell, L.P., Houston, TX (US);
Abstract
Metallic laminations for magnetic circuits. Some of the illustrative embodiments may be a magnetic circuit comprising a low reluctance magnetic flux path comprising a plurality of stacked metallic laminations (each lamination having an edge), and an air gap in operational relationship to at least a portion of the edges of the stacked metallic laminations (wherein magnetic flux flows at least partially through the stacked metallic laminations and the air gap). Adjacent edges of the stacked metallic laminations are intentionally offset by an amount greater than manufacturing tolerance of edge position for the stacked metallic laminations to improve eddy current loss occurring from lamination-to-lamination contact at the edges.