Servo valve assembly

A servo valve assembly, comprising:

• a first nozzle opposing a second nozzle, wherein the first and second nozzles are spaced apart by a gap and each nozzle has an outlet opening;
• a shaft positioned in the gap between the first and second nozzles, wherein:
• the shaft defines a diameter (D) and a circumferential surface and is rotatable about an axis of rotation (R-R);
• the shaft defines first and second reduced radial portions around its circumferential surface, and the first and second reduced radial portions are in fluid communication with the first and second nozzle outlet openings, respectively;
• and
• the shaft is configured to rotate between a first position where the first nozzle outlet opening is more occluded by the shaft circumferential surface than the second nozzle outlet opening, and a second position where the first nozzle outlet opening is less occluded by the shaft circumferential surface than the second nozzle outlet opening;
• and
• a biasing member configured to provide a biasing force that opposes rotation of the shaft towards a third position where the first nozzle outlet opening and the second nozzle outlet opening are equally occluded by the shaft circumferential surface;
• wherein the shaft further comprises a slot extending along its diameter (D), and the biasing member is received in the slot to apply the biasing force to the shaft;
• wherein the biasing member comprises a pair of S-shaped springs that are fixed in the slot.