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:
Jul. 29, 2008
Filed:
Jun. 16, 2006
Applicants:
Oliver Ahrens, Bremen, DE;
Otto Szenn, Leonberg, DE;
Wjatscheslaw Missal, Bremen, DE;
Karl-heinz Forster, Dresden, DE;
Inventors:
Oliver Ahrens, Bremen, DE;
Otto Szenn, Leonberg, DE;
Wjatscheslaw Missal, Bremen, DE;
Karl-Heinz Forster, Dresden, DE;
Assignee:
Festo AG & Co., Esslingen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H 47/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a method and apparatus for determining the functional status of an electromagnetic valve having a solenoid and plunger including determining the electro-mechanical switching time of a valve based on characteristics of an electrical characteristic responsive to the solenoid; comparing the valve electro-mechanical switching time to a predetermined value; and generating a valve status signal dependant on the results of the comparison.