Bi-directional flow control valve
AssigneeHydraForce, Inc.
InventorZilek Liberfarb
Life of this patent
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Abstract
A bi-directional flow control valve includes a two-port housing, and a hollow cage within the housing. The hollow cage has rows of cross-sectional holes that communicate with the ports. A hollow compensating spool is slidably arranged within the hollow cage between the cross-sectional holes. Pressure differential between the ports induces movement in the compensating spool. This movement causes the compensating spool to reduce the opening of one row of cross-sectional holes and increase the opening of the other. In this manner, the valve provides consistent flow control characteristics in each flow direction.
Claims13
A bi-directional flow control valve comprising
- a housing having a longitudinal cavity and a pair of ports;
- a cage disposed within the longitudinal cavity, the cage having an internal void and a pair of cross sectional holes, wherein when the valve is in an open position, the pair of cross-sectional holes communicates with the internal chamber and the ports to provide a flow path between the ports through the internal void;
- a compensating spool slidably arranged within the cage between the ports, wherein the compensating spool responds to a fluid flowing from one of the ports to the other port along the flow path by moving to reduce the opening of one of the cross-sectional holes and increase the opening of the other cross-sectional hole in proportion to a pressure differential between the ports to control the flow of the fluid.
Dependencies are inferred from the claim text.