Diaphragm check valve
AssigneeCarefusion Corporation
InventorSiddarth K. Shevgoor
Life of this patent
Estimating the term…
Abstract
A check valve, including a valve and a valve support surface, to permit a fluid to move through the check valve in a first direction and resist a fluid flow through the valve in a second direction, the valve having a valve diaphragm and an isolating bridge, with a portion of the valve engaging against valve support surface to resist deformation or stretching of the valve when a backflow of fluid into the check valve occurs. The valve support surface having a first support surface and a second support surface, and the valve positioned with the valve diaphragm spaced apart from the first support surface, and the isolating bridge spaced apart from the second support surface.
Claims20
A check valve assembly comprising:
- a valve support surface having a first support surface and a second support surface, the second support surface positioned radially outward, relative to the first support surface;
- and
- a valve having:
- a mounting rim;
- a valve diaphragm extending radially inward from the mounting rim, and having a valve segment defined by a slit;
- and an annular isolating bridge extending between the mounting rim and the valve diaphragm;
- wherein the first support surface is spaced apart from the nearest surface of the valve diaphragm in a first direction by a first distance, and the second support surface is spaced apart from the nearest surface of the annular isolating bridge in the first direction by a second distance, and wherein the first distance is greater than the second distance such that, when the valve moves toward the valve support surface, the isolating bridge engages against the second support surface before the valve diaphragm engages the first support surface.
A method of controlling flow through a check valve assembly comprising:
- defining a fluid passageway having a valve support surface, wherein the valve support surface comprises a first support surface and a second support surface, the second support surface radially outward, relative to the first support surface;
- and
- positioning a valve adjacent to the valve support surface, wherein the valve comprises a valve diaphragm configured to resist a fluid flow through the fluid passageway, the valve diaphragm having a valve segment defined by a slit, and an annular isolating bridge extending radially outward from the valve diaphragm;
- wherein, the first support surface is spaced apart from the valve diaphragm in a first direction by a first distance, and the second support surface is spaced apart from the annular isolating bridge in the first direction by a second distance, the first distance is greater than the second distance, and when the valve is moved in the first direction toward the valve support surface, the isolating bridge engages the second support surface before the valve diaphragm engages the first support surface.
Dependencies are inferred from the claim text.