Single stage servo valve assembly

A single stage servo valve assembly comprising:

• a valve body assembly, the valve body assembly defining;
• a valve body extending along a valve body axis between a first valve body end and a second valve body end;
• and
• a supply port, a control port and a return port formed through the valve body each defining a respective fluid flow channel, having a fluid flow axis, providing fluid communication between an interior of the valve body and an exterior of the valve body;
• wherein each of the supply port, and the return port includes a tapered nozzle at an interface between the interior of the valve body and the respective port fluid flow channel;
• and
• a drive assembly configured to control a flow of fluid between the supply port, the control port and the return port, via the interior of the valve body, in response to an electric command signal;
• wherein the drive assembly comprises:
• a first elongate member extending substantially in the fluid flow axis direction with an end axially aligned with and arranged to be received in the nozzle of the supply port;
• a second elongate member extending substantially in the fluid flow axis direction with an end axially aligned with and arranged to be received in the nozzle of the return port;
• and
• means for causing movement of the first and the second elongate members relative to the respective nozzles responsive to the command signal;
• wherein the first elongate member and the second elongate member are connected to each other such that movement of one of the first and the second elongate axial members in a first direction relative to the respective nozzle causes movement of the other elongate member in a second, opposite direction relative to its respective nozzle;
• wherein the means for causing movement of the first and second elongate members comprises a first electric coil provided around the first elongate member and a second electric coil provided about the second elongate member.