Fluid control system

Details Fluid control system Fluid control system

1980-05-27

1982-09-28

Maslousky, Paul E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Bias-type input and feedback signal means

92131, F15B 1316

Patent

active

043512267

ABSTRACT:
A fluid control system includes a fluid motor 11, a control valve 12 for directing fluid flow to and from the motor 11, and a control valve actuator 14 for operating the control valve 12. The control valve actuator 14 includes an actuator member 32, a feedback member 44, and a spring 46 which exerts a force on the actuator member 32 whose magnitude varies with the relative positions of the actuator member 32 and the feedback member 44. A command pressure signal moves the actuator member 32 to operate the control valve 12 in order to direct fluid flow to and from the fluid motor 11. A feedback link 41 connects the feedback member 44 to the fluid motor 11. The actuator piston 32 is slidably carried on the feedback member 44, so that any drifting of the fluid motor 11 results in immediate movement of the actuator member 32 and control valve 12 to correct the drifting.

REFERENCES:
patent: 1669108 (1928-05-01), Warner
patent: 4138088 (1979-02-01), Cyrot

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