Servo valve
AssigneeHamilton Sundstrand Corporation
InventorsMaciej BUJEWICZ, Marcin KORCZYNSKI
Life of this patent
Estimating the term…
Abstract
A servo valve includes a fluid transfer valve assembly comprising a supply port and a control port; a 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 means configured to move the valve spool relative to the fluid transfer assembly in response to the control signal to regulate the fluid flow. The drive means is arranged to rotate the spool relative to the fluid transfer assembly, the spool provided with openings arranged to selectively align with or block flow channels in the fluid transfer assembly according to the direction and degree of rotation of the spool.
Claims12
A servo valve comprising:
- a fluid transfer valve assembly comprising a supply port and a control port;
- a 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 means configured to move the valve spool relative to the fluid transfer assembly in response to the control signal to regulate the fluid flow;
- wherein:
- the drive means is arranged to rotate the valve spool relative to the fluid transfer assembly;
- the spool is provided with first and second openings arranged to selectively align with or block respective first and second flow channels in the fluid transfer valve assembly according to a direction and degree of rotation of the valve spool by the drive means.
A method of driving a valve spool of a servo valve, comprising:
- rotating the valve spool to adjust alignment of openings in the valve spool with fluid chambers of a fluid transfer assembly to define fluid flow paths according to a control signal.
Dependencies are inferred from the claim text.