The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2009
Filed:
May. 03, 2006
Applicants:
Hans Schwenkel, Stuttgart, DE;
Thomas Leitmann, Rechberghausen, DE;
Mark Hufnagel, Wolfsschlugen, DE;
Inventors:
Hans Schwenkel, Stuttgart, DE;
Thomas Leitmann, Rechberghausen, DE;
Mark Hufnagel, Wolfsschlugen, DE;
Assignee:
Pilz GmbH & Co. KG, Ostfildern, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and a device for switching off an inductive load in a failsafe manner are proposed. According to one aspect of the invention, the method and the device are configured such that a predefined inductive voltage is generated during switch-off. The predefined inductive voltage is monitored by means of a monitoring circuit. In a preferred embodiment, the inductive voltage is set by means of threshold switches and the inductive voltage also is monitored by means of these threshold switches.