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:
Jan. 25, 2005
Filed:
Jun. 24, 2002
Volk R Stegmann, Bretten, DE;
Thorsten Fritz, Gaggenau, DE;
Martin Streib, Vaihingen, DE;
Peter Wiltsch, Wimshen, DE;
Armin Hassdenteufel, Sachsenheim-Ochsenbach, DE;
Volk r Stegmann, Bretten, DE;
Thorsten Fritz, Gaggenau, DE;
Martin Streib, Vaihingen, DE;
Peter Wiltsch, Wimshen, DE;
Armin Hassdenteufel, Sachsenheim-Ochsenbach, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
In a method and a device for leak testing of a vessel, e.g., a tank venting system of a motor vehicle, a leak-tightness measurement is performed by introducing a positive pressure or partial vacuum and detecting the variation over time of a positive pressure or partial vacuum in the vessel, and a reference measurement is performed using a reference leak. A conclusion is drawn as to the presence of a leak in the vessel by comparing the results of the leak-tightness measurement and the reference measurement. To avoid faulty diagnoses, the positive pressure or partial vacuum during the leak-tightness measurement and the reference measurement is detected by using a single pressure measuring device.