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:
Apr. 23, 2002
Filed:
Jan. 10, 2000
Applicant:
Inventors:
Jan Müller, Säve, SE;
Peter Ålleving, Alingsås, SE;
Assignee:
Volvo Personvagnar AB, , SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 3/02 ; G01M 3/26 ; G01M 1/500 ;
U.S. Cl.
CPC ...
G01M 3/02 ; G01M 3/26 ; G01M 1/500 ;
Abstract
Methods for testing leakage in a tank system are disclosed including sealing the tank system, creating a pressure variation in the sealed tank system, measuring the pressure values in the sealed tank system at predetermined time intervals for a measuring period, and comparing the shape of a curve formed by the measured pressure values to a predetermined curve for the system, whereby if that comparison exceeds a predetermined limit value, the leakage test is disregarded. Apparatus for carrying out such testing is also disclosed.