A valve unit for a respiratory support system and an assembly therefor

The valve unit (10) according to any one of the preceding claims, wherein the valve in an engaged state is open to allow fluid entering the first port to flow therethrough towards the second port.

The valve unit according to any one of the preceding claims, wherein the valve is a one-way valve, check valve, or a duck bill valve arranged to open when a spike connector inserted into the fluid passageway engages the duck bill valve.

The valve unit according to any one of the preceding claims, having a tubular or cylindrical cross-sectional shape.

The valve unit according to any one of the preceding claims, wherein the first sealing member forms a flange and/or the second sealing member forms a flange.

The valve unit according to any one of the preceding claims, wherein the first sealing member has a first material or structural characteristic, and the second sealing member has a second material or structural characteristic, wherein the first material or structural characteristic and the second material or structural characteristic are selected to allow for reversible deformation.

The valve unit according to any one of the preceding claims, made of an elastomeric material.

The valve unit according to any one of the preceding claims, wherein the first sealing surface is non-integrally formed with or detachable from the fluid supply chamber.

The valve unit according to any one of the preceding claims, wherein the first sealing surface is integrally formed with the fluid supply chamber.

The valve unit according to any one of the preceding claims, wherein the fluid passageway is formed by an interior wall of the valve unit and extending along a longitudinal centre axis of the valve unit and, and the fluid passageway comprising:

• a first section of the interior wall proximal the second port having a first cross section,
• a second section of the interior wall extending along the longitudinal axis from an end of the first section, and having a second cross section that is larger than that of the first cross section,
• wherein the first section of the interior wall is arranged to engage a spike connector upon insertion of the spike connector into the fluid passageway to engage the valve.

The valve unit according to any one of the preceding claims, wherein the fluid passageway is formed along a longitudinal centre axis of the valve unit and wherein the valve is arranged in the fluid passageway longitudinally between the first port and second port for controlling the flow of fluid between the first port and second port.