Double-acting electropneumatic positioner

Details Double-acting electropneumatic positioner Double-acting electropneumatic positioner

1996-02-23

1999-08-10

Lopez, F. Daniel

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

91363R, 91420, F15B 1316

Patent

active

059341696

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.

REFERENCES:
patent: 2601511 (1952-06-01), Gaffney
patent: 2624319 (1953-01-01), Heyer
patent: 2800913 (1957-07-01), Swartwout et al.
patent: 4628499 (1986-12-01), Hammett
patent: 4819543 (1989-04-01), Leinen
patent: 5038670 (1991-08-01), Roe
Honeywell brochure on "Series 2200 Electro-pneumatic positioner", Nov. 1993 .

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