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. 17, 2009
Filed:
Nov. 19, 2004
Jan Bredau, Esslingen, DE;
Reinhard Keller, Ostfildern, DE;
Jan Bredau, Esslingen, DE;
Reinhard Keller, Ostfildern, DE;
Festo AG & Co., Esslingen, DE;
Abstract
A diagnostic device for at least one pneumatic valve actuator arrangement, comprises a pressure sensor, a volumetric flow sensor, a control means for producing control signals for the valve actuator arrangement and position sensors for detecting the position of at least one moving actuator member. The diagnostic device also includes a first diagnostic module for leak detection, a second diagnostic module for the detection of a choking effect in pneumatic supply and venting lines and at least one third diagnostic module for the detection of load and friction changes in the case of the moving actuator member and/or of valve switching faults, switching means being provided for deactivating the at least one third diagnostic module in the case of the detection of a fault by the first and/or second diagnostic module. Using this diagnostic device it is possible to detect, owing to cooperation of the diagnostic modules, faults and trouble conditions in an extremely systematic fashion both qualitatively and quantitatively.