Double-acting electropneumatic positioner
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United States of America Patent
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Aug 10, 1999
Grant Date -
N/A
app pub date -
Feb 23, 1996
filing date -
Feb 24, 1995
priority date (Note) -
Expired
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Abstract
A double-acting electropneumatic positioner for controlling an actuator, the actuator having a first and second chamber, comprises a single-acting electropneumatic positioner which provides an output pneumatic pressure to the first chamber of the actuator. A pressure inverter, coupled to the single-acting electropneumatic positioner, inverts the output pneumatic pressure. The inverted output pneumatic pressure is then coupled to the second chamber of the actuator.
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