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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.:

US 12107468 B1

PDFFull Text
Date of Patent:
Oct. 01, 2024

Filed:

Dec. 14, 2021

Brushless dc motor having high power density for power tool

Applicant:

Black & Decker Inc., New Britain, CT (US);

Inventors:

Barak N. Gohn, Shrewsbury, PA (US);

Colin M. Crosby, Baltimore, MD (US);

Nicholas J. Lowe, Lutherville-Timonium, MD (US);

James R. Clarke, York, PA (US);

Daniel F. Heck, Toms River, NJ (US);

Michael P. Sikora, Baltimore, MD (US);

Christian B. Rogerson, Towson, MD (US);

Ryan F. Schroeder, Hampstead, MD (US);

Connor T. Mohan, Fallston, MD (US);

Michael D. Grove, Windsor, PA (US);

Assignee:

Black & Decker Inc., New Britain, CT (US);

Attorney:

Amir R. Rohani

Primary Examiner:

Terrance L Kenerly

Assistant Examiner:

Viswanathan Subramanian

Int. Cl.
CPC ...
H02K 21/12 (2006.01); H02K 1/16 (2006.01); H02K 1/27 (2022.01); H02K 1/276 (2022.01); H02K 1/28 (2006.01); H02K 3/28 (2006.01); H02K 3/46 (2006.01); H02K 3/52 (2006.01); H02K 5/16 (2006.01); H02K 7/14 (2006.01); H02K 9/06 (2006.01); H02K 11/33 (2016.01); H02K 21/16 (2006.01); B25F 5/00 (2006.01); H02K 11/215 (2016.01);
U.S. Cl.
CPC ...
H02K 21/12 (2013.01); H02K 1/16 (2013.01); H02K 1/165 (2013.01); H02K 1/27 (2013.01); H02K 1/276 (2013.01); H02K 1/28 (2013.01); H02K 3/28 (2013.01); H02K 3/46 (2013.01); H02K 3/522 (2013.01); H02K 5/16 (2013.01); H02K 7/145 (2013.01); H02K 9/06 (2013.01); H02K 11/33 (2016.01); H02K 21/16 (2013.01); B25F 5/001 (2013.01); H02K 11/215 (2016.01); H02K 2203/03 (2013.01); H02K 2213/03 (2013.01);
Abstract

A brushless direct-current (BLDC) motor for a power tool includes a rotor assembly and a stator assembly including stator windings. A ratio of a motor size (Km) constant of the motor to an electrical envelope of the motor including electrical parts of the motor is greater than approximately 850 (N·m/√W)/m{circumflex over ( )}3. A ratio of a motor size (Km) constant of the motor to a magnetic envelope of the motor including stator core and windings is greater than approximately 980 (N·m/√W)/m{circumflex over ( )}3.

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