Patent · US Expired

Electromotor

US5821661A · kind A · utility

16Cited by

9References

7Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Walter Wissmach · Munich, DE
Stefan Miescher · Eschen, LI
Ferdinand Kristen · Germering, DE
Ernst Klein · Düsseldorf, DE

Key dates

Filing date	Jun 3, 1997
Grant date	Oct 13, 1998
Priority date	—
Expiry date	Jun 3, 2017

Classification

Technology area (CPC H)Electricity
CPC primaryH02K2203/12
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electromotor including a stator (32) having a central receiving region for a rotor (23), at least two, projecting into the rotor-receiving region, stator pole pairs (18, 19, 20, 21), an insulation element (1, 2) provided at each end side of the stator (32), a stator winding (16, 17) surrounding a stator pole pair (18, 19, 20, 21) and a portion of a respective insulation element (1, 2), a permanent magnet (14, 15) between a pair of adjacent stator poles (18, 19, 20, 21), and dielectric support elements (7, 8) cooperating with respective insulation elements (1,2) and arranged along the main axis of the rotor-receiving region of the stator (32) between side surfaces (28, 29, 30, 31) of the stator poles (18, 19, 20, 21), which extend substantially parallel to the main axis of the rotor-receiving region of the stator (32) and to each other, and the stator windings (16, 17), respectively.

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