Gas shutoff apparatus
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United States of America Patent
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May 29, 1990
Grant Date -
N/A
app pub date -
Feb 9, 1989
filing date -
Feb 10, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A flow rate of gas is measured with a flow rate measurement means and a 'consumption state' defined with a combination of maximum flow rate, the total amount and a consumption time of the gas is therefor detected. The consumption state is compared with a reference consumption condition which is represented by a predetermined consumption state, and when the consumption state exceeds the reference consumption condition, supply of the gas is interrupted. Furthermore, a monitor range of the consumption state is formed, and when a consumption state is present in the monitor range, the reference consumption condition is changed.
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