Humidification interface arrangements

1. An apparatus for generating and providing a pressurized breathable gas to a patient's airways, the apparatus comprising:

a respiratory pressure therapy (RPT) device having an engagement port pneumatically and electrically coupled to the RPT device; and

an air delivery tube configured to engage the engagement port of the RPT device so as to pass a flow of breathable gas to a patient interface, the air delivery tube comprising electric contacts associated with a heating and/or a sensing arrangement,

wherein the air delivery tube includes a cuff body and a locking collar that is rotatably mounted to the cuff body,

wherein the locking collar is rotatably movable, relative to the cuff body, between (1) an unlocked position to allow connection of the air delivery tube to the engagement port and disconnection of the air delivery tube from the engagement port, and (2) a locked position to releasably lock the air delivery tube to the engagement port,

wherein the air delivery tube is structured and arranged to, when the locking collar is rotated into the locked position, pneumatically connect to the engagement port and define an operational configuration of the apparatus, and

wherein said pneumatic connection is only effected after the locking collar is rotated into the locked position.

2. The apparatus according to claim 1 , wherein the RPT device comprises an engagement dock, and the engagement port forms part of the engagement dock.

3. The apparatus according to claim 2 , wherein the engagement dock is in the form of a water reservoir dock structured and arranged to receive a water reservoir in an operative position, the water reservoir including a cavity structured to hold a volume of water, such that in the operational configuration the water reservoir is in pneumatic connection with the engagement dock and with the air delivery tube.

4. The apparatus according to claim 1 , wherein the air delivery tube is structured and arranged to electrically connect to the engagement port when the air delivery tube is engaged with the engagement port and the locking collar is in the unlocked position.

5. The apparatus according to claim 4 , wherein the air delivery tube is structured and arranged to form electrical and pneumatic connections with the engagement port in series.

6. The apparatus according to claim 4 , wherein each of the connection and disconnection of the air delivery tube includes two independent user movements, one for pneumatic connection and disconnection and one for electrical connection and disconnection.

7. The apparatus according to claim 6 , wherein the two independent user movements are in mutually transverse planes.

8. The apparatus according to claim 1 , wherein each of the locking collar and the engagement port includes a respective guide slot or a locking pin, the guide slot being structured and arranged to receive the locking pin to lock the air delivery tube to the engagement port.

9. The apparatus according to claim 1 , further comprising an electrical plug provided to a superior side of the cuff body, wherein electrical plug includes said electrical contacts.

10. The apparatus according to claim 9 , wherein the locking collar includes a slot or cut-out on a superior side thereof to accommodate the electrical plug.

11. The apparatus according to claim 1 , wherein the locking collar is telescopically mounted to the cuff body to allow the locking collar to both rotate and slide axially relative to the cuff body.

12. The apparatus according to claim 11 , wherein rotation of the locking collar into the locked position simultaneously moves the locking collar axially relative to the cuff body to effect said pneumatic connection.

13. The apparatus according to claim 1 , wherein each of two diametrically opposing sides of the engagement port includes a locking pin and each of two diametrically opposing sides of the locking collar includes a guide slot configured to receive a respective locking pin.

14. The apparatus according to claim 12 , wherein each guide slot includes a generally horizontal, guiding section leading to a locking section that slopes away from the guiding section, and wherein the guiding section is associated with an axial movement of the locking collar with respect to the engagement port and the locking section is associated a rotational movement of the locking collar with respect to the engagement port.

15. The apparatus according to claim 1 , wherein the locking collar is telescopically mounted to the cuff body to allow the locking collar to both rotate and slide axially relative to the cuff body,

wherein rotation of the locking collar into the locked position simultaneously moves the locking collar axially relative to the cuff body to effect said pneumatic connection,

wherein each of two diametrically opposing sides of the engagement port includes a locking pin and each of two diametrically opposing sides of the locking collar includes a guide slot configured to receive a respective locking pin,

wherein each guide slot includes a generally horizontal, guiding section leading to a locking section that slopes away from the guiding section, and wherein the guiding section is associated with an axial movement of the locking collar with respect to the engagement port and the locking section is associated a rotational movement of the locking collar with respect to the engagement port.