Flow controller

Fluid handling – Line condition change responsive valves – Pilot or servo controlled

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Details

1374875, G05D 706

Patent

active

048770515

ABSTRACT:
A fluid flow control apparatus including a fluid flow control valve, a fluid flow sensor, and a fluid flow control circuit receiving a signal from the fluid flow sensor and outputting a signal to the fluid flow control valve. The fluid flow control circuit including an actual control circuit which outputs a signal related to the comparison of an actual flow signal and a desired flow signal, a desired flow comparator circuit which outputs a signal based on the comparison of the desired flow signal with a desired flow threshold signal, and a summing circuit which receives the outputs and provides a control signal based on these outputs.

REFERENCES:
patent: 3552428 (1971-01-01), Pemberton
patent: 4417312 (1983-11-01), Cronin
patent: 4665938 (1987-05-01), Brown
patent: 4720807 (1988-01-01), Ferran
patent: 4724865 (1988-02-01), Hirano

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