Electronic pilot positioner

Details Electronic pilot positioner Electronic pilot positioner

1992-02-13

1993-01-12

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

91459, F15B 1316

Patent

active

051780534

ABSTRACT:
A positioner for use in pneumatic systems moves a pneumatic operator. The positioner is an electronic pilot positioner or electronic to pneumatic interface which provides accurate positioning of linear actuators in response to an electronic control signal. The actuator is moved as pneumatic fluid is exhausted or supplied through the exhaust valve and supply valve. The positioner utilizes two solenoids for controlling a supply valve and an exhaust valve. The positioner includes a control circuit which receives a signal from a central controller and a signal from a feedback circuit. The control circuit compares the feedback signal and the controller signal and generates a signal for positioning the actuator.

REFERENCES:
patent: 3664234 (1972-05-01), Simons et al.
patent: 3899915 (1975-08-01), William, Jr. et al.
patent: 3958492 (1976-05-01), Curless
patent: 4121504 (1978-10-01), Nowak
patent: 4794845 (1989-01-01), Vick
patent: 4865389 (1989-09-01), Martin
patent: 5065663 (1991-11-01), Stadler et al.
Keystone Valve USA Inc., Instruction Manual for Keystone "ZACK" Positioner, 1988.

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