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:
May. 29, 2001
Filed:
Aug. 05, 1998
Thomas R. Neuenschwander, Fort Wayne, IN (US);
L. H. Carbide Corporation, Fort Wayne, IN (US);
Abstract
Progressive die assembly for forming a centrally interlocked stack of laminations for rotors, the stack of laminations having a central stack axis. The die assembly includes a punch which forms a centrally located, circular indentation in each lamination, the indentations each having a cental axis which is substantially coaxial with the stack axis. The indentation provides corresponding projections and depressions in the laminas which may be interlocked by engaging adjacent depressions and projections. The station of the die assembly which includes the punch for forming the indentation may also include a counterforce which is applied when punching the indentation so that the stock material is relatively flat. The die assembly also includes a rotating and stacking station in which the laminations are blanked, then rotated, and finally stacked together to form a lamination stack.