Measuring and testing – With fluid pressure – Leakage
Patent
1989-09-18
1991-01-22
Chapman, John
Measuring and testing
With fluid pressure
Leakage
73309, G01M 332, G01F 2332
Patent
active
049861131
ABSTRACT:
A liquid tank leakage detection system includes a standpipe and associated measuring pipe together with a sealing connection to the filler pipe of a liquid tank system. A liquid level detector used in cooperation with the measuring pipe includes a float coupled to a measuring beam having one end fixed and the other end coupled to the float. Level changes within the liquid system produce position changes of the float which in turn causes bending or flexing of the beam. A bridge detecting circuit including strain gauges coupled to the flexing beam is operative to provide an output signal indicative of the extent of liquid level changes. A thermocouple is positioned within the liquid tank to provide a temperature compensating signal for use by the measurement system.
REFERENCES:
patent: 2460503 (1949-02-01), Howe
patent: 3580055 (1971-05-01), White
patent: 4813275 (1989-03-01), Castor
Harrison John M.
Marshburn Hubert L.
Stout, deceased Ron
Chapman John
Computerized Tank Testing, Inc.
Ekstrand Roy A.
Roskos Joseph W.
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