System for selectively emptying or filling a tank
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United States of America Patent
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Jul 11, 1989
Issued Date -
N/A
app pub date -
Jan 29, 1988
filing date -
Jun 3, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a method and a system for selectively filling or emptying a tank by a filling or discharging device for the tank. In accordance with the invention, a passive responder and an aerial element of an electromagnetic detection system are respectively provided in the vicinity of the inlet or outlet of the tank and on the part of the filling or discharging device cooperating with the tank inlet or outlet. The aerial element forms part of a detection system for generating an electromagnetic interrogation field, which detection system generates a signal when detecting a responder. In one embodiment of the invention, the responder is a passive responder generating a uniquely coded signal by which the detection system identifies the responder.
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