Patent · US Active

Electromagnetic drive device

US7750772B2 · kind B2 · utility

8Cited by

11References

7Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Jörg Hagen · Berlin, DE
Carsten Protze · Dresden, DE

Key dates

Filing date	May 9, 2006
Grant date	Jul 6, 2010
Priority date	—
Expiry date	Aug 17, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH01F2007/086
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electromagnetic drive system contains an armature that can be displaced along an axis. The armature contains a piston-shaped section. The piston-shaped section is guided in a cylindrical section of the stator. A recess extends through the piston-shaped section substantially in the direction of the axis. The incorporation of the recess results in that a fluid cushion that builds up in front of the piston-shaped section during rapid movement can be relieved through the piston-shaped section.

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