Servo-valve pilot stage and a two-stage servo-valve including such a stage
AssigneeZodiac Hydraulics, Societe par Actions Simplifiee
InventorGuylain Ozzello
Life of this patent
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Abstract
A pilot stage for a jet type servo-valve, the pilot stage including an ejector for ejecting a jet of fluid and that is movable facing a deflector suitable for generating a pressure difference that can be used for moving a spool of the servo-valve. The ejector extends radially projecting from a column to which the ejector is secured and is in fluid-flow communication with a central bore of the column through which the ejector is fed with fluid, the column having a first end that is embedded in the servo-valve and through which the fluid is introduced into the column, and the column has a second end that is subjected to drive from a torque motor for selectively twisting the column in one direction or the other about a rest position.
Claims11
A pilot stage for a jet type servo-valve, the pilot stage comprising an ejector for ejecting a jet of fluid and that is movable facing a deflector suitable for generating a pressure difference that can be used for moving a spool of the servo-valve, and wherein the ejector extends radially projecting from a column, the column has a first end that is embedded in the servo-valve and through which the fluid is introduced into the column, and the column has a second end that is subjected to drive from a torque motor for selectively twisting the column in one direction or the other about a rest position, wherein the column is a single piece, the ejector being fastened at an end of a tube that extends radially from the column and being in fluid-flow communication with a central bore of the column through which the ejector is fed with fluid.
Dependencies are inferred from the claim text.