Electropneumatic transducer

Details Electropneumatic transducer Electropneumatic transducer

1989-04-21

1990-02-06

Nilson, Robert G.

Fluid handling

Pressure modulating relays or followers

With counter-balancing pressure feedback to the modulating...

1371165, 1374875, 1376275, G05D 1620

Patent

active

048982008

ABSTRACT:
An electropneumatic transducer for converting an electric signal to a pneumatic pressure has a nozzle flapper mechanism and a pilot valve engaging a diaphragm assembly. The nozzle flapper mechanism has a nozzle flapper composed of an electrostrictive element. The diaphragm assembly comprises two diaphragms having different effective areas. A nozzle back pressure is applied to one of the diaphragms, and an atmospheric pressure is applied to the other diaphragm. A supplied pressure or output pressure is applied between the two diaphragms. The nozzle back pressure is varied dependent on the voltage applied to the electrostrictive element for moving the diaphragms to enable the pilot valve to control a valve disposed in a passage connecting supply and output ports.

REFERENCES:
patent: 2964051 (1960-12-01), Garnett
patent: 2984251 (1961-05-01), Quinby
patent: 2993497 (1961-07-01), Coles
patent: 2994334 (1961-08-01), Loveless
patent: 3063422 (1962-11-01), Gregowski
patent: 3313212 (1967-04-01), Baker

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