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:
Aug. 08, 2006
Filed:
Apr. 22, 2005
Michael Agnes, Bel Air, MD (US);
Allyn Boyce, Baldwin, MD (US);
Hung Du, Reisterstown, MD (US);
Earl Ortt, Bel Air, MD (US);
Brandon Verbrugge, Towson, MD (US);
Richard H. Walter, Baldwin, MD (US);
Ren T. Wang, Timonium, MD (US);
Jiaqi Zhang, Cockeysville, MD (US);
Michael Agnes, Bel Air, MD (US);
Allyn Boyce, Baldwin, MD (US);
Hung Du, Reisterstown, MD (US);
Earl Ortt, Bel Air, MD (US);
Brandon Verbrugge, Towson, MD (US);
Richard H. Walter, Baldwin, MD (US);
Ren T. Wang, Timonium, MD (US);
Jiaqi Zhang, Cockeysville, MD (US);
Black & Decker Inc., Newark, DE (US);
Abstract
A stator of an electric motor is formed by inserting pre-formed magnets on a cylinder having anchors and plastic is molded around the magnets and anchors to secure the magnets to a surface of the cylinder, forming a cylinder/magnet assembly. A pilot feature is formed in at least one endwall of the plastic molding when it is molded. An end plate is located with respect to the cylinder/magnet assembly by mating a corresponding pilot feature of the end plate with the pilot feature in the endwall of the plastic molding. In another aspect of the invention, magnets are inserted into magnet receiving pockets of a cylinder and plastic molded therearound with the magnet pockets holding the magnets in place during molding of the plastic. In another aspect of the invention, the north and south poles of a cylinder and magnet assembly have unequal distribution angles. In another aspect of the invention, the north and south poles of a cylinder and magnet assembly have unequal numbers of magnets. In another aspect of the invention, the anchors are also formed as flux spreaders. In another aspect of the invention, the stator is used in a power tool.