Patent · US Expired

Spindle motor for hard disk drives with improved running accuracy

US6753636B2 · kind B2 · utility

8Cited by

38References

18Claims

0Family size

Assignee

Precision Motors Deirtsche Minebea GmbH · DE

Inventors

Thilo Rehm · Villingen-Schwenningen, DE
Jorg Hoffmann · Katzenelnbogen, DE

Key dates

Filing date	May 18, 2001
Grant date	Jun 22, 2004
Priority date	—
Expiry date	May 18, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49009
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention related to a spindle motor for hard disk drives with improved running accuracy where the sheet metal package or the complete stator consisting of sheet metal package and windings is encompassed by a centering casing of plastic, which is preferably applied by means of an injection molding operation. Depending on the design of the spindle motor the centering casing can be centered on the stationary shaft and/or on the outer rings/inner raceways pertaining to the sets of roolling bodies. Furthermore, a stator without centering casing is described whose sheet metal package is centered directly on the outer rings/inner raceways.

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