Fluid handling – With indicator – register – recorder – alarm or inspection means – Liquid level responsive indicator – recorder or alarm
Reexamination Certificate
2006-12-28
2009-02-10
Hepperle, Stephen M (Department: 3753)
Fluid handling
With indicator, register, recorder, alarm or inspection means
Liquid level responsive indicator, recorder or alarm
C137S392000, C073S30400R, C340S620000
Reexamination Certificate
active
07487793
ABSTRACT:
A valve assembly, such as a tap for a liquefied gas cylinder, includes an overfill protection device and a liquid level gauge having an electrode assembly comprising a pair of lamellar electrodes mounted closely adjacent a housing member of the overfill protection device and deflectable into close proximity with a float of the overfill protection device for insertion into the gas cylinder. A circuit board is provided, preferably mounted on the electrode assembly, and has an electronic converter circuit for measuring the electrical capacitance between the electrodes and producing in response to the measured capacitance an output signal representative of the liquid level in the container. A display means is mounted on a body of the valve assembly or remote therefrom, to indicate the liquid level in the container in response to the output signal from the electronic converter circuit.
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Search Report From Corresponding European Application No. 05111523 (Mar. 9, 2006).
Hoekstra Linze
Schmitz Jean-Claude
Hepperle Stephen M
Polster Lieder Woodruff & Lucchesi L.C.
Schneider Craig M
Torrent Trading Ltd.
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