Fluid handling – Pressure modulating relays or followers – With counter-balancing pressure feedback to the modulating...
Patent
1990-09-18
1991-07-23
Cohan, Alan
Fluid handling
Pressure modulating relays or followers
With counter-balancing pressure feedback to the modulating...
1374875, 25112906, G05D 1620
Patent
active
050334964
ABSTRACT:
An electro-pneumatic transducer converts an electrical input signal into a proportional (direct or indirect) pneumatic output signal. A circuit will sense the magnitude of the input signal, monitor the output fluid pressure and adjust a piezoelectric beam voltage until a desired output fluid pressure is achieved. The output fluid pressure is controlled by the deflection of a piezoelectric beam which is polarized and will deflect with an applied voltage. The output fluid pressure is monitored by a pressure sensor.
REFERENCES:
patent: 4325399 (1982-04-01), Frick
patent: 4481967 (1984-11-01), Frick
patent: 4630631 (1986-12-01), Barnes
Cohan Alan
ITT Corporation
Lombardi Menotti J.
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