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:
Dec. 06, 1994
Filed:
Aug. 31, 1993
Applicant:
Inventors:
John N Rogers, Tucson, AZ (US);
Rinaldo Tedeschi, Newington, CT (US);
Vincent J Poracaro, Newington, CT (US);
Assignee:
Environmental Systems Products, Inc., East Granby, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73 492 ;
Abstract
A method and apparatus for testing vehicle fuel tank integrity determines the free space in the system by pressurizing the system with a known quantity of gas. The loss in pressure over a test period is then monitored. These data are used to calculate the size of the leak. Alternatively, the free volume is compared to a reference volume and a normalized leak rate computed for comparison to reference values.