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:
Oct. 15, 2013
Filed:
May. 22, 2012
Hung T. Du, Reisterstown, MD (US);
Earl M. Ortt, Bel Air, MD (US);
Brandon L. Verbrugge, Towson, MD (US);
Garrett P. Mccormick, Manchester, MD (US);
Michael A. Zemlock, North Haven, CT (US);
Kevin M. Hogan, Jarrettsville, MD (US);
Jiaqi Zhang, Baltimore, MD (US);
Ren Hong Wang, Timonium, MD (US);
Frank A. Mannarino, Baltimore, MD (US);
Spencer G. Maid, Fallston, MD (US);
Shane Ashley Moll, Mechanicsburg, PA (US);
James C. Benton, Bel Air, MD (US);
Hung T. Du, Reisterstown, MD (US);
Earl M. Ortt, Bel Air, MD (US);
Brandon L. Verbrugge, Towson, MD (US);
Garrett P. McCormick, Manchester, MD (US);
Michael A. Zemlock, North Haven, CT (US);
Kevin M. Hogan, Jarrettsville, MD (US);
Jiaqi Zhang, Baltimore, MD (US);
Ren Hong Wang, Timonium, MD (US);
Frank A. Mannarino, Baltimore, MD (US);
Spencer G. Maid, Fallston, MD (US);
Shane Ashley Moll, Mechanicsburg, PA (US);
James C. Benton, Bel Air, MD (US);
Black & Decker Inc., Newark, DE (US);
Abstract
A power tool has a motor having a stator made by separately forming pole pieces and field coils. The field coils are placed over necks of the pole path pieces. An armature has an outside diameter of at least 0.625 the outside diameter of the stator is placed in the stator. The housing has a girth of 200 mm or less with the motor wound to provide a maximum watts out to housing girth ratio of at least 5 maximum watts outs to 1 mm of housing girth. The field coils may be formed so that they extend beyond pole tips of the pole pieces.