Fail-fixed servovalve

Details Fail-fixed servovalve Fail-fixed servovalve

F - Mech Eng,Light,Heat,Weapons

15

B

137/96

F15B 11/00 (2006.01) F15B 13/00 (2006.01) F15B 13/043 (2006.01)

Patent

CA 1112540

ABSTRACT OF THE DISCLOSURE A fail-fixed servovalve is provided for use in a digital control system. The servovalve is comprised of a deflecting means which deflects a jet pipe in response to an electrical input signal. Fluid flowing through the jet pipe causes a spool to translate within a sleeve, thereby allowing pressurized fluid to flow through selected ports within the sleeve to control the movement of an output piston. The output of the servovalve is essentially linear over the primary range of digital input currents with the output being zero when the input current is either zero or in excess of the maximum rated current for the servovalve.

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