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US 9,644,645 B2Granted
Servovalve having two stages and a pilot stage adapted to such a servovalve
AssigneeZodiac Hydraulics
InventorGuylain Ozzello
Life of this patent
Estimating the term…
Abstract
A hydraulic servovalve having two stages and feedback members in which the movable power distribution member has clamp means for clamping the feedback member, while allowing a clamped portion of the feedback member at least one freedom of movement relative to the movable distribution member.
Claims15
A two-stage hydraulic servovalve comprising:
- a power stage including a movable power distribution member;
- and
- a pilot stage comprising a torque motor having a rotor connected to a hydraulic fluid emitter or deflector, and a deformable feedback rod or blade operationally connected to the rotor and to the movable power distribution member in order to establish a mechanical connection between them,
- wherein the movable power distribution member has clamp means for clamping the feedback rod or blade, and the clamp means exerts a clamping force directly on the feedback rod or blade, and
- the clamp means are arranged to allow a clamped portion of the feedback rod or blade to move relative to the movable power distribution member at least along a direction extending transversely to a clamping force generated by the clamp means, and
- the clamp means are also arranged to allow a portion of the feedback rod or blade on which the clamping force is applied to slide relative to the movable power distribution member along a power stage main axis.
3 more elements
A two-stage hydraulic servovalve comprising:
- a power stage including a movable power distribution member movable in an axial direction of the power stage;
- and
- a pilot stage comprising a torque motor having a rotor connected to a hydraulic fluid emitter or deflector, and a deformable feedback rod or blade operationally connected to the rotor and to the movable power distribution member in order to establish a mechanical connection between them;
- wherein the movable power distribution member has a clamp that clamps the feedback rod or blade, while allowing a clamped portion of the feedback rod or blade to move relative to the movable power distribution member at least along a direction extending transversely to a clamping force generated by the clamp;
- and
- wherein the clamp applies the clamping force directly on the feedback rod or blade in the axial direction of the power stage, and
- the clamp means are also arranged to allow a portion of the feedback rod or blade on which the clamping force is applied to slide relative to the movable power distribution member in the axial direction of the power stage.
4 more elements
A two-stage hydraulic servovalve comprising:
- a power stage including a movable power distribution member movable along a power stage main axis;
- and
- a pilot stage comprising a torque motor having a rotor connected to a hydraulic fluid emitter or deflector, and an elongated deformable feedback member operationally connected to the rotor and to the movable power distribution member in order to establish a mechanical connection between them;
- wherein the movable power distribution member has two opposing rod members that clamp one end portion of the elongated deformable feedback member,
- wherein the clamped end portion of the elongated deformable feedback member can move relative to the movable power distribution member at least along a direction extending transversely to a clamping force generated by the opposing rod members;
- and
- wherein the opposing rod members apply the clamping force in a direction co-axial with or parallel to the power stage main axis.
4 more elements
Dependencies are inferred from the claim text.