Control means

Details Control means Control means

1974-09-11

1976-07-27

Maslousky, Paul E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Bias-type input and feedback signal means

91387, F15B 1316

Patent

active

039712958

ABSTRACT:
A positioner for a fluid-operated actuator has a fluid control valve displaced by a controlling force applied to a force-balance lever engaging one end of a biasing spring, the other end of which engages feedback means including an element displaceable by actuator movement. The valve lies between the biasing means and said feedback means element. Adjustment means are provided for the spring and for the feedback means to set the actuator zero position and movement range. Fluid conduits from the valve comprise open channels in a unitary member containing the valve and with a wall of a housing form closed section passages to porting in said wall opening directly into the actuator porting.

REFERENCES:
patent: 1564688 (1925-12-01), Kimball
patent: 2602654 (1952-07-01), Parker
patent: 2770246 (1956-11-01), Shafer et al.
patent: 2811138 (1957-10-01), Clements
patent: 3257912 (1966-06-01), Horst
patent: 3693501 (1972-09-01), Ward

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