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. 30, 2010
Filed:
Jul. 21, 2006
Hung T. Du, Reisterstown, MD (US);
Joshua F. West, Towson, MD (US);
Richard T. Walter, Baldwin, MD (US);
Hung T. Du, Reisterstown, MD (US);
Joshua F. West, Towson, MD (US);
Richard T. Walter, Baldwin, MD (US);
Black & Decker Inc., Newark, DE (US);
Abstract
A method of manufacturing a power tool includes forming an armature by placing an electrically insulative sleeve on an armature shaft, securing a lamination stack having slots therein on the armature shaft with the insulative sleeve disposed therebetween, securing a commutator on one end of the armature shaft with the insulative sleeve disposed therebetween, winding magnet wires in the slots in the lamination stack and securing ends of the magnet wires to the commutator, and molding thermally conductive plastic to at least partially encase the magnet wires in plastic. The armature is then disposed in a stator to form an electric motor and the electric motor is disposed in a power tool. In an aspect, electrically insulative plastic is molded in the slots of the lamination stack to form slot liners and around the ends of the lamination stack to form end spiders. In an aspect, the method includes disposing an electrically insulative seal around the insulative sleeve and abutting the commutator to seal any gap between an end of the insulative sleeve and the commutator.