Measuring and testing – Liquid level or depth gauge – Float
Reexamination Certificate
2005-05-31
2008-11-25
Noland, Thomas P (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Float
C073S29000R, C073S313000, C073S447000, C702S025000
Reexamination Certificate
active
07454969
ABSTRACT:
A magnetostrictive fuel level probe includes a spring-loaded foot. The probe shaft of the fuel level probe moves up and down within the spring-loaded foot as a function of fuel density. The spring-loaded foot includes a reference magnet whose height relative to the bottom of a fuel storage tank is fixed. Currents generated by the fuel level probe allow measurement of how much of the fuel level probe is positioned above the reference magnet, and from this measurement, the buoyancy of the fuel level probe may be measured. From the buoyancy of the fuel level probe, the fuel density may be calculated.
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Nelson Mullins Riley & Scarborough LLP
Noland Thomas P
Veeder-Root Company
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