Servovalve

A servovalve comprising:

• a fluid transfer valve assembly comprising a supply port and a control port within a housing;
• a moveable valve spool arranged to regulate flow of fluid from the supply port to the control port in response to a control signal;
• and
• a drive assembly configured to axially move the valve spool relative to the fluid transfer valve assembly in response to the control signal to regulate the fluid flow, wherein the drive assembly includes:
• a jet pipe moveable by an amount determined by the control signal to cause corresponding movement of the valve spool;
• a first piezoelectric actuator element;
• a first elastic element extending radially outward from the jet pipe in a first direction and connected to the the first piezoelectric actuator element;
• a second piezoelectric actuator element;
• an elastic spring extending radially outward from the jet pipe in a direction opposite the first direction and connected to the second piezoelectric actuator element;
• and
• wherein contraction of the first piezoelectric actuator element causes the jet pipe to move the first direction and contraction of the second piezoelectric actuator element causes the jet pipe to move the second direction.