Actuator system
AssigneeParker-Hannifan Corporation
InventorLuc P. Cyrot
Life of this patent
Estimating the term…
Abstract
An actuator system (14) comprising a valve assembly (40) having an inner spool (50), an outer spool (60), and a sleeve (70). An assembly (80) directly drives the inner spool (50) to move it relative to the outer spool (60), and thereby hydromechanically causes the outer spool (60) to move relative to the sleeve (70). A control assembly (90) provides current input to the drive assembly (80), which converts current input into mechanical motion. The control assembly (90) senses the position of the inner spool (50) and regulates current in accordance with the sensed position.
Claims20
A valve system comprising a valve assembly, a drive assembly, and a control assembly;
- wherein:
- the valve assembly comprises an inner spool, an outer spool, and a sleeve, the inner spool being situated within the outer spool, and the outer spool being situated within the sleeve;
- the drive assembly directly drives the inner spool to move axially relative to the outer spool;
- the outer spool is hydromechanically caused to move axially relative to the sleeve upon movement of the inner spool, thereby opening/closing flow paths between ports in the sleeve;
- the control assembly provides current input to the drive assembly;
- the drive assembly converts current input into mechanical motion, proportional and directional to the current input, to directly drive the inner spool;
- and
- the control assembly senses positions of the inner spool and regulates current input in accordance with the sensed inner-spool positions.
Dependencies are inferred from the claim text.