Diaphragm check valve
AssigneeCareFusion 303, Inc.
InventorSiddarth K. Shevgoor
Life of this patent
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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 surface portion and a second surface portion, and the valve positioned with the valve diaphragm spaced apart from the first surface portion, and the isolating bridge spaced apart from the second surface portion.
Claims20
A check valve assembly comprising:
- a first valve support surface comprising a first surface portion and a second surface portion, the second surface portion positioned radially outward from the first surface portion and extending around a perimeter of the first surface portion, wherein the second surface portion is spaced apart from the first surface portion in a first direction;
- and
- a valve comprising a mounting rim, a valve diaphragm, and an annular isolating bridge extending between the mounting rim and the valve diaphragm, the valve positioned with the annular isolating bridge extending toward and spaced apart from the second surface portion of the first valve support surface by a first distance, and the valve diaphragm longitudinally spaced apart from the first surface portion of the first valve support surface by a second distance, wherein the second distance is greater than the first distance, the valve having a closed position, wherein a valve segment of the valve diaphragm resists fluid flow through the valve, and an open position, wherein the valve segment of the valve diaphragm permits the fluid flow through the valve.
A check valve assembly comprising:
- a first valve support surface comprising a first surface portion and a second surface portion, the second surface portion positioned radially outward from the first surface portion and extending around a perimeter of the first surface portion, wherein the second surface portion is spaced apart from the first surface portion;
- and
- a valve comprising a mounting rim, a valve diaphragm, and an annular isolating bridge extending between the mounting rim and the valve diaphragm, the valve positioned with the annular isolating bridge extending toward and spaced apart from the second surface portion by a first distance, and the valve diaphragm longitudinally spaced apart from the first surface portion by a second distance, wherein the second distance is greater than the first distance, the valve having a closed position, wherein a valve segment of the valve diaphragm resists fluid flow through the valve, and an open position, wherein the valve segment is moved in a direction away from the first valve support surface to permit the fluid flow through the valve.
A check valve assembly comprising:
- a first valve housing and a second valve housing, the first valve housing having a first valve support surface comprising a first surface portion and a second surface portion, the second surface portion positioned radially outward from the first surface portion and extending around a perimeter of the first surface portion, wherein the second surface portion is spaced apart from the first surface portion in a first direction;
- and
- a valve comprising a mounting rim, a valve diaphragm, and an annular isolating bridge extending between the mounting rim and the valve diaphragm, the valve positioned between the first valve housing and the second valve housing with the annular isolating bridge extending toward and spaced apart from the second surface portion by a first distance, and the valve diaphragm longitudinally spaced apart from the first surface portion by a second distance, wherein the second distance is greater than the first distance, such that, the annular isolating bridge is configured to engage against the second surface portion when a fluid flow from the second valve housing engages against the valve diaphragm.
Dependencies are inferred from the claim text.