| 摘要 |
A valve for controlling a double-acting utilization device includes inner and outer valve members where the outer valve member has pressure slots with first and second lateral edges, respectively, and the inner valve member includes first and second lands with third and fourth lateral edges, respectively. The first and third lateral edges form input orifices and second and fourth lateral edges form return orifices. The effective radial positions of the input and return orifices are chosen to generate reaction torque within the valve itself. Drive torque and position are applied to the outer valve member and feedback torque and position are communicated to the inner valve member via a torsion bar which is coupled to an output member of the double-acting utilization device.
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