Stepped check valves
AssigneeCareFusion 303, Inc.
InventorRaymond P. Feith
Life of this patent
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Abstract
A check valve includes an upper housing defining an inlet of the check valve, a lower housing defining an outlet of the check valve, and a cavity interposed between and defined by the upper and lower housings for fluidly connecting the inlet and the outlet. The check valve further includes a valve member mounted in the cavity to selectively permit fluid flow in a first direction, and prevent fluid backflow in a second direction opposite to the first direction. The valve member includes a valve body and a valve stem portion extending axially through a central axis of the valve body.
Claims18
A check valve, comprising:
- an upper housing defining an inlet of the check valve;
- a lower housing defining an outlet of the check valve, wherein a cavity is interposed between and defined by the upper housing and lower housing for fluidly connecting the inlet and the outlet;
- and
- a valve member seated in the cavity to selectively permit fluid flow in a first direction and restrict fluid backflow in a second direction opposite to the first direction,
- wherein the lower housing comprises a biasing post disposed in the cavity at a central portion thereof, and
- wherein the biasing post may include a central aperture and a two semi cylindrical slots through which fluid may flow from the inlet and into the cavity.
A method for assembling a check valve, comprising:
- providing an upper housing defining an inlet of the check valve;
- providing a lower housing defining an outlet of the check valve, wherein a cavity interposed between and defined by the upper and lower housings for fluidly connecting the inlet and the outlet;
- and
- providing a valve member seated in the cavity to selectively permit fluid flow in a first direction, and restrict fluid backflow in a second direction opposite to the first direction, comprising:
- placing the valve member in the upper housing and vibrating the valve member and upper housing until the valve member is fully seated in the upper housing,
- wherein the lower housing comprises a biasing post disposed in the cavity at a central portion thereof, a central axis of the biasing post being aligned with a central longitudinal axis of the check valve, and
- wherein the biasing post may include a central aperture and a two semi cylindrical slots through which fluid may flow from the inlet and into the cavity.
Dependencies are inferred from the claim text.