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. 14, 2015
Filed:
Jun. 26, 2012
Aloys Quatmann, Bakum, DE;
Ulrich Engelmann, Osnabrück, DE;
Oliver Borgmann, Ibbenbüren, DE;
Elster GmbH, Mainz-Kastel, DE;
Abstract
Method for checking the leakproffness of safety valves. Method for testing the leadkproofness of two controllable valves (V, V), wherein the vales are arranged at opposite ends of a test volume (). An inlet pressure pe is present upstream of the test volume, in front of valve V, and an outlet pressure pa is present downstream of the test volume, behind the valve V. A control device controls the valves to open and close, and the control device is coupled to at least two pressure switches () which are both operatively connected to the test volume () in order to monitor the pressure. The first pressure switch is set to a first triggering threshold d, wherein dpe/x, where x>3. The second pressure switch is set to a second triggering threshold d, wherein dpe(1−1/x). A valve is controlled in order to open the valve for a period of time tLand then to close said valve. The process then waits for a measurement period tMand a first pressure switch is checked. The second valve is then opened and closed again and the second pressure switch is checked. The functionality of the valves is indicated if the method has not been aborted owing to a pressure switch being triggered.