Fluid connector with face seal

1. A fluid connector system for delivery of breathing gas to a patient from a respiratory pressure therapy device, the fluid connector system comprising:

a first end portion with a first opening for a fluid flow, a seal portion extending around a periphery of the first opening, and a latching portion, and

a second end portion with an inner tube defining a second opening for the fluid flow, a sealing surface extending around a periphery of the second opening and configured to engage the seal portion to form a face seal, and an outer tube comprising a complementary latching portion configured to engage with the latching portion and configured to be depressed into a cavity formed between the inner tube and the outer tube,

wherein the face seal forms a seal to breathing gas travelling between the first opening and the second opening, and the engagement between the latching portion and the complementary latching portion secures the first end portion with the second end portion,

wherein, when the first end portion and the second end portion are connected, the seal portion is configured to engage the sealing surface before the latching portion and the complementary latching portion touch,

wherein the seal portion includes a bellows-shape, a partial bellows shape, or a frustoconical portion, and

wherein the bellows-shape, partial bellows shape, or frustoconical portion contacts the sealing surface to form the face seal when the first end portion and the second end portion are connected.

2. The fluid connector system according to claim 1 , wherein the second end portion further comprises a stabiliser located between the inner tube and the outer tube.

3. The fluid connector system according to claim 2 , wherein the stabiliser is formed at least in part from an elastomer.

4. The fluid connector system according to claim 1 , wherein the first end portion is connected to a respiratory pressure therapy device including a blower and the second end portion is connected to a fluid conduit.

5. The fluid connector system according to claim 1 , wherein the sealing surface is flat.

6. The fluid connector system according to claim 5 , wherein the sealing surface is substantially perpendicular to a direction of the fluid flow from the first end portion to the second end portion.

7. The fluid connector system according to claim 1 , wherein the sealing surface extends circumferentially around the second opening.

8. The fluid connector system according to claim 1 , wherein the sealing surface is formed on a flange that extends radially from the inner tube.

9. The fluid connector system according to claim 8 , wherein the flange extends substantially perpendicularly from the inner tube.

10. The fluid connector system according to claim 8 , wherein the inner tube extends beyond the flange in a direction towards the seal portion.

11. The fluid connector system according to claim 10 , wherein the inner tube extends at least partially though the seal portion when the complementary latching portion is engaged with the latching portion.

12. The fluid connector system according to claim 1 , wherein the seal portion is compliant in a direction of engagement between the first end portion and the second end portion.

13. The fluid connector system according to claim 1 , wherein the seal portion includes the frustoconical portion.

14. The fluid connector system according to claim 13 , wherein the frustoconical portion contacts the sealing surface to form the face seal when the first end portion and the second end portion are connected.

15. The fluid connector system according to claim 1 , wherein the seal portion includes a partial spherical surface.

16. The fluid connector system according to claim 15 , wherein the partial spherical surface contacts the sealing surface to form the face seal when the first end portion and the second end portion are connected.

17. The fluid connector system according to claim 1 , wherein the seal portion includes flail the bellows-shaped or partial bellows-shaped portion.

18. The fluid connector system according to claim 17 , wherein the bellows-shaped or partial bellows-shaped portion contacts the sealing surface to form the face seal when the first end portion and the second end portion are connected.

19. The fluid connector system according to claim 1 , wherein the seal portion is compliant in a direction radial to an axis defined by a direction of engagement between the first end portion and the second end portion.

20. The fluid connector system according to claim 1 , wherein the seal portion is formed as a cantilever structure having a fixed end proximate to the first opening and a free end projecting away from the fixed end, the fixed end being fixedly mounted on the first end portion, and the free end configured to engage the sealing surface in order to form the face seal.

21. The fluid connector system according to claim 1 , wherein the seal portion includes a substantially circular profile, and wherein an inner diameter of the seal portion decreases along an axial direction away from the first opening.

22. The fluid connector system according to claim 1 , wherein the seal portion at least partially forms a seal opening separate from the first opening.

23. The fluid connector system according to claim 22 , wherein the seal opening and the first opening are concentric and axially spaced from one another.

24. The fluid connector system according to claim 1 , wherein the second end portion further includes an overhang that extends beyond the sealing surface, the seal portion configured to engage the second end portion proximate to a corner formed between the overhang and the sealing surface, wherein the overhang prevents the sealing surface from extending into the first opening or the second opening when the second end portion is coupled to the first end portion, and wherein the overhang is configured to contact a stop of the first end portion in order to limit travel of the second end portion into the first opening.