Control valve with annular poppet check valve
AssigneeHUSCO Automotive Holdings LLC
InventorMichael Layne
Life of this patent
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Abstract
Embodiments of the invention provide a control valve including a control valve body having an inlet passage, an outlet passage, a workport, and a chamber arranged in a fluid path between the workport and the outlet passage. The control valve further includes an annular poppet slidably received within the chamber and to selectively engage a poppet seat to inhibit fluid flow through the fluid path when a pressure in the fluid path is less than a predefined pressure level, and a valve element slidably received within the control valve body to selectively provide fluid communication between the inlet passage and the workport and selectively provide fluid communication between the workport and the outlet passage along the fluid path. The poppet is biased towards the poppet seat by an elastic element.
Claims25
A control valve comprising:
- a control valve body having an inlet passage, an outlet passage, a workport, and a chamber arranged in a fluid path between the workport and the outlet passage;
- an annular poppet slidably received within the chamber and to selectively engage a poppet seat to inhibit fluid flow through the fluid path when a pressure in the fluid path is less than a predefined pressure level;
- a valve element slidably received within the control valve body to selectively provide fluid communication between the inlet passage and the workport and selectively provide fluid communication between the workport and the outlet passage along the fluid path;
- and
- an elastic element biasing the annular poppet toward the poppet seat.
A control valve comprising:
- a control valve body having an inlet passage, an outlet passage, a workport, a first valve seat between the inlet passage and the workport, and a second valve seat in a fluid path between the workport and the outlet passage;
- a valve element moveable between a first element position where the valve element engages the first valve seat and disengages the second valve seat, and a second element position where the valve element disengages the first valve seat and engages the second valve seat;
- an annular poppet moveable between a first position where the annular poppet engages an annular poppet seat to inhibit fluid flow through the fluid path and a second poppet position where the annular poppet disengages the annular poppet seat and fluid flow is provided through the fluid path, wherein the annular poppet is moveable from the first poppet position towards the second poppet position when pressure in the fluid path is greater than a predefined pressure level;
- and
- a spring to bias the annular poppet toward the first poppet position.
Dependencies are inferred from the claim text.