Patent · US Active

Oscillating electric power tool with balanced armature shaft

US11471995B2 · kind B2 · utility

0Cited by

8References

9Claims

0Family size

Assignee

C. & E. FEIN GMBH · DE

Inventors

Juergen Blickle · Göppingen, DE
Achim Hess · Korb, DE
Olaf Klabunde · Höhenkirchen-Siegertsbrunn, DE

Key dates

Filing date	Sep 30, 2020
Grant date	Oct 18, 2022
Priority date	—
Expiry date	Apr 14, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH02K15/165
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An oscillating power tool with an electric motor is provided, including an armature shaft with an armature and a fan wheel, including an eccentric arranged on the armature shaft at one end thereof, a first balancing mass for balancing an unbalance of the eccentric and possibly an eccentric bearing, being arranged in the proximity of the eccentric or the eccentric bearing, respectively, however, at an axial distance, further including a second balancing mass for balancing a couple unbalance caused by the axial distance between the eccentric and the eccentric bearing, respectively, and the first balancing weight, wherein the second balancing mass is arranged on the armature shaft at the side facing away from the eccentric or the eccentric bearing. Also a method for balancing such an electric motor is provided.

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