Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1989-02-09
1990-05-29
Cohan, Alan
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
1374875, 137460, 13762411, G05D 706
Patent
active
049287281
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.
REFERENCES:
patent: 3776249 (1973-12-01), Wailes
patent: 4223692 (1980-09-01), Perry
patent: 4519955 (1985-05-01), Meyer
Horii Hiroshi
Kato Shinzo
Mitsuo Namba
Nakane Shin-ichi
Reppei Uematsu
Cohan Alan
Matsushita Electric - Industrial Co., Ltd.
The High Pressure Gas Safety Institute of Japan
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