Hybrid valving system for varying fluid flow rate

Details Hybrid valving system for varying fluid flow rate Hybrid valving system for varying fluid flow rate

1993-07-30

1994-07-19

Hepperle, Stephen M.

Fluid handling

Systems

Dividing into parallel flow paths with recombining

251 11, F16K 1120

Patent

active

053299655

ABSTRACT:
In a fluid valving system, binary fluid control lines are connected in parallel between a common fluid inlet and a common fluid outlet. Each line has a binary valve and a metering orifice for passing a predetermined rate of fluid flow. The rates are in a geometric progression in factors of two. An analog fluid control line is connected in parallel with the binary lines, and has a continuously adjustable flow rate regulator for passing any selected rate of fluid flow up to a maximum at least equal to the largest increment of rate change in the binary lines. The regulator is formed of a miniature solid state device. A controller sets each binary valve open or closed, and sets the regulator for a selected flow rate, such that cooperative settings provide for a smoothly variable rate of total fluid flow.

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"The Fluistor Microstructure is Poised for Commercialization" (author unknown), Sensor Business Digest, Feb., 1992, pp. 9-11.

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