Patent · US Active

Electromagnetic drive unit and an electromechanical switching device

US7948339B2 · kind B2 · utility

4Cited by

5References

20Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Josef Burger · Herbrazhofen, DE
Reinhard Maier · Herzogenaurach, DE
Bernd Trautmann · Erlangen, DE

Key dates

Filing date	Mar 2, 2007
Grant date	May 24, 2011
Priority date	—
Expiry date	Sep 25, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH01H50/36
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electromechanical switching device, especially a contactor or a multifunctional device including a contactor, includes at least one stationary contact piece, at least one movable contact piece movable to and from the at least one stationary contact piece for opening or closing a current path and an electromagnetic drive unit including a yoke and a coil and a movable armature. In at least one embodiment, the electromagnetic drive unit is adapted to displace the movable contact piece in response to a voltage applied to the coil. The at least one movable contact piece and the at least one stationary contact piece are adapted to limit movement of the armature after activation of the electromagnetic drive unit.

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