Patent · US Active

Power tools with motor having a multi-piece stator

US8207647B2 · kind B2 · utility

8Cited by

219References

36Claims

0Family size

Assignee

BLACK & DECKER INC. · US

Inventors

Hung T. Du · Reisterstown, US
Earl M. Ortt · Bel Air, US
Brandon L. Verbrugge · Brookfield, US
Garrett P. McCormick · Manchester, US
Michael A. Zemlock · North Haven, US
Eric J. Samuelsen · Shrewsbury, US
Kevin Hogan · Austin, US
Jiaqi Zhang · Baltimore, US
Ren Wang · Perry Hall, US
Frank A. Mannarino · Baltimore, US
Allison A. Smith · Baltimore, US
Therese M. Rakosky · Towson, US
Kyle J. Wheaton · Towson, US
Antonios M. Nicolaidis · Towson, US
Shane Ashley Moll · Mechanicsburg, US
Eric L. Bernstein · Baltimore, US

Key dates

Filing date	Jan 14, 2011
Grant date	Jun 26, 2012
Priority date	—
Expiry date	Jan 14, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH02K15/022
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A power tool has a motor having a stator made by separately forming pole pieces, return path pieces and field coils. The field coils are placed over necks of the pole path pieces and the return path pieces are affixed to the pole pieces. An armature having an outside diameter of at least 0.625 the outside diameter of the stator is placed in the stator. The field coils may be formed so that they extend beyond pole tips of the pole pieces.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.