Method and apparatus for regulating fluid flow

Details Method and apparatus for regulating fluid flow Method and apparatus for regulating fluid flow

1986-12-08

1987-09-01

Cohan, Alan

Fluid handling

Processes

With control of flow by a condition or characteristic of a...

137 14, 137486, 1374875, G05D 1620

Patent

active

046901639

ABSTRACT:
A method for regulating the flow volume of a fluid medium and apparatus therefor wherein the actual value of the flow volume of the fluid medium is measured and an analogous signal is generated representing the actual value. A signal representing a desired value of flow volume is also generated and is compared with the actual value signal with the analogous differential signal being applied as an electrical control signal consisting of individual pulse signals having a frequency proportional to the value of the analogous differential signal. The control signal is amplified and applied to control either the pressure or the rate of flow of the fluid medium.

REFERENCES:
patent: 3295421 (1967-01-01), McCormick
patent: 3369561 (1968-02-01), Zimmerman et al.
patent: 3487458 (1969-12-01), Martens et al.
patent: 3652912 (1972-03-01), Bordonaro
patent: 3796939 (1974-03-01), Raggi et al.
patent: 4253480 (1981-03-01), Kessel
patent: 4261509 (1981-04-01), Anders

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