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 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:
- an upstream valve support surface comprising a first surface portion and a second surface portion, the first surface portion having a fluid passageway that extends therethrough, and 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 an upstream 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, wherein the valve diaphragm comprises an upstream facing surface and the annular isolating bridge comprises an upstream facing surface that is spaced apart from the valve diaphragm in the upstream direction;
- wherein a distance between the first surface portion and the second surface portion is less than a distance between the upstream facing surfaces of the valve diaphragm and the annular isolating bridge.
A check valve assembly comprising:
- an upstream valve support surface comprising a first surface portion and a second surface portion, the first surface portion having a fluid passageway that extends therethrough, and 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 an upstream 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, wherein the annular isolating bridge extends toward the upstream valve support surface;
- wherein, when the valve moves toward the upstream valve support surface, the annular isolating bridge engages against the second surface portion before the valve diaphragm engages against the first surface portion.
Dependencies are inferred from the claim text.