Servo valve
AssigneeHamilton Sundstrand Corporation
InventorZbigniew Jaskiewicz
Life of this patent
Estimating the term…
Abstract
A servo valve comprising first and second nozzles and first and second piezoelectric actuators arranged to control fluid flow through the first and second nozzles respectively. A first fluid flow path is defined between the first nozzle and the first piezoelectric actuator and a second fluid flow path is defined between the second nozzle and the second piezoelectric actuator. The first and second piezoelectric actuators are arranged such that applying a voltage to the first and second piezoelectric actuators causes a change in dimension thereof, which acts to open or restrict said first and second fluid flow paths respectively.
Claims15
A servo valve comprising:
- first and second nozzles;
- and
- first and second piezoelectric actuators arranged to control fluid flow through the first and second nozzles respectively, wherein:
- a first fluid flow path is defined between the first nozzle and the first piezoelectric actuator;
- a second fluid flow path is defined between the second nozzle and the second piezoelectric actuator;
- and
- the first and second piezoelectric actuators are arranged such that applying a voltage to the first and second piezoelectric actuators causes a change in dimension thereof, which acts to open or restrict said first and second fluid flow paths respectively.
A method of controlling a servo valve having first and second nozzles and first and second piezoelectric actuators, wherein a first fluid flow path is defined between the first nozzle and the first piezoelectric actuator and a second fluid flow path is defined between the second nozzle and the second piezoelectric actuator, the method comprising supplying a voltage to first and second piezoelectric actuators causing a change in dimension thereof which opens or restricts the first and second fluid flow paths defined between the first and second nozzles and first and second piezoelectric actuators respectively.
Dependencies are inferred from the claim text.