Measuring and testing – Volumetric content measuring
Reexamination Certificate
2011-04-19
2011-04-19
Fitzgerald, John (Department: 2856)
Measuring and testing
Volumetric content measuring
C073S291000
Reexamination Certificate
active
07926341
ABSTRACT:
In a liquid sensing system, an RF signal is applied to a series-resonant circuit. The coil of the resonant circuit is placed proximate to a fuel tank, causing electromagnetic radiation to propagate into the fuel space. The fuel acts as an electrical load to the resonant circuit in a manner proportionate to the volume of fuel in the tank and/or to variations in electrical properties of the fuel itself. The loading effect of the fuel can change the resonant frequency and/or the Q of the resonant circuit. The loading effect of the fuel is determined by monitoring a change in one or more electrical parameters associated with the excited resonant circuit, such as a voltage across the resistor in the resonant circuit. Changes in this voltage are analyzed by a controller, the result of which is used to output a value indicative of level and/or composition of the fuel.
REFERENCES:
patent: 2720624 (1955-10-01), Gunst et al.
patent: 2772393 (1956-11-01), Davis
patent: 3256482 (1966-06-01), Rosso
patent: 3540275 (1970-11-01), Post et al.
patent: 4599892 (1986-07-01), Doshi
patent: 4651105 (1987-03-01), Inbar
patent: 4729245 (1988-03-01), Hansman, Jr.
patent: 4769593 (1988-09-01), Reed et al.
patent: 5088325 (1992-02-01), Eichberger et al.
patent: 5150683 (1992-09-01), Depa et al.
patent: 5301542 (1994-04-01), Meitzler et al.
patent: 5414368 (1995-05-01), Ogawa et al.
patent: 5440310 (1995-08-01), Schreiner
patent: 5497753 (1996-03-01), Kopera
patent: 5832772 (1998-11-01), McEwan
patent: 6018247 (2000-01-01), Kelly
patent: 6078280 (2000-06-01), Perdue et al.
patent: 6293142 (2001-09-01), Pchelnikov et al.
patent: 6505509 (2003-01-01), Gualtieri
patent: 6564658 (2003-05-01), Pchelnikov et al.
patent: 7174783 (2007-02-01), McSheffrey et al.
patent: 7276916 (2007-10-01), Hammer
patent: 7319401 (2008-01-01), Åkerstrom et al.
patent: 7458260 (2008-12-01), Roesner
patent: 2001/0015099 (2001-08-01), Blaine
patent: 2003/0200801 (2003-10-01), Lipscomb et al.
patent: 2004/0251919 (2004-12-01), Stahlmann et al.
patent: 2006/0103393 (2006-05-01), Stahlmann et al.
patent: 2006/0201234 (2006-09-01), Abe et al.
Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority for PCT/IB2008/003071 Mailed Apr. 15, 2009.
Boudaoud Idir
McCall Alan
Stewart William
Dougherty, Esq. T. A.
Dunlap, Esq. P. N.
Fitzgerald John
Schrader Electronics Ltd.
Thurnau, Esq. J. A.
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