A respiratory mask assembly for delivery of non-invasive positive airway pressure to a user having a rigid mask shell including a plurality of slots; a soft cushion including at least one flexible sealing lip constructed and arranged to extend around an inner periphery of the cushion and to deform t
A respiratory mask assembly for delivery of non-invasive positive airway pressure to a user having a rigid mask shell including a plurality of slots; a soft cushion including at least one flexible sealing lip constructed and arranged to extend around an inner periphery of the cushion and to deform to provide a continuous airtight seal between the cushion and the rigid mask shell, the at least one flexible sealing lip being constructed and arranged to return to a relaxed state when the cushion is disassembled from the rigid mask shell, the soft cushion including a retaining portion; and a retaining ring configured to engage with the retaining portion of the cushion, and including a plurality of clips each positioned on respective spring arms to engage with each of the respective plurality of slots of the rigid mask shell to retain the cushion in position with the rigid mask shell.
대표청구항▼
1. A respiratory patient interface assembly for use in delivery of non-invasive positive airway pressure to a user comprising: a rigid patient interface shell including an inner wall and a plurality of slots;a soft cushion including a seal-forming membrane structured to form a seal with the user's f
1. A respiratory patient interface assembly for use in delivery of non-invasive positive airway pressure to a user comprising: a rigid patient interface shell including an inner wall and a plurality of slots;a soft cushion including a seal-forming membrane structured to form a seal with the user's face and at least one flexible sealing lip constructed and arranged to extend radially inward beyond the inner wall from an inner periphery of the cushion and to deform to provide a continuous airtight seal between the cushion and the rigid patient interface shell, the at least one flexible sealing lip being further constructed and arranged to return to a relaxed state when the cushion is disassembled from the rigid patient interface shell; anda retaining ring coupled to the cushion, and including a plurality of clips each positioned on respective spring arms to engage with each of the respective plurality of slots of the rigid patient interface shell to retain the cushion in position with the rigid patient interface shell in use. 2. The respiratory patient interface assembly of claim 1, constructed and arranged to rely only on contact between the at least one flexible sealing lip and the rigid patient interface shell to provide an airtight seal between the cushion and the rigid patient interface shell. 3. The respiratory patient interface assembly of claim 1, wherein each of the plurality of clips includes an underside lip adapted to engage a surface of the rigid patient interface shell. 4. The respiratory patient interface assembly of claim 3, wherein said underside lip includes a beveled surface. 5. The respiratory patient interface assembly of claim 1, wherein the retaining ring further includes a retaining tab. 6. The respiratory patient interface assembly of claim 5, wherein the plurality of clips each extend from the retaining ring in respective first directions along respective planes, and wherein the retaining tab is constructed and arranged to extend outwardly from respective ones of the plurality of clips generally in a plane at 90 degrees to the respective first directions that the respective planes of the plurality of clips generally extend. 7. The respiratory patient interface assembly of claim 1, wherein the plurality of clips is constructed and arranged to be squeezed together to initiate disengagement of the soft cushion from the rigid patient interface shell. 8. The respiratory patient interface assembly of claim 1, wherein a retaining portion extends inwardly from the inner periphery of the cushion parallel to the at least one flexible sealing lip, the retaining portion and the at least one flexible sealing lip being spaced apart such that the retaining ring is positioned between the at least one flexible sealing lip and the retaining portion when the retaining ring is engaged with the retaining portion. 9. The respiratory patient interface assembly of claim 1, wherein the cushion and the patient interface shell at least partially define a chamber, and wherein the at least one flexible sealing lip extends toward the chamber from the inner periphery of the cushion. 10. The respiratory patient interface assembly of claim 9, wherein the at least one flexible sealing lip extends into the chamber and beyond an inner periphery of the retaining ring. 11. The respiratory patient interface assembly of claim 1, wherein the inner wall is structured to contact and deform the at least one flexible sealing lip when the cushion is assembled to the patient interface shell. 12. The respiratory patient interface assembly of claim 1, wherein the inner wall extends from the patient interface shell and the at least one flexible sealing lip extends from the inner periphery of the cushion substantially perpendicular to the inner wall. 13. The respiratory patient interface assembly of claim 1, wherein an inner edge of the at least one flexible sealing lip extends beyond the inner wall when the cushion and the retaining ring are engaged with the patient interface shell. 14. The respiratory patient interface assembly of claim 1, wherein the patient interface shell comprises an outer wall spaced from the inner wall such that the retaining ring extends between the inner wall and the outer wall when the retaining ring is engaged with the patient interface shell. 15. The respiratory patient interface assembly of claim 14, wherein the plurality of slots are positioned between the inner wall and the outer wall. 16. The respiratory patient interface assembly of claim 1, wherein the at least one flexible sealing lip extends from the inner periphery of the cushion such that the at least one flexible sealing lip is deflected in a direction away from the patient interface shell when the cushion is engaged with the patient interface shell. 17. The respiratory patient interface assembly of claim 1, wherein the at least one flexible sealing lip extends from the inner periphery of the cushion in a direction substantially perpendicular to a direction of engagement between the cushion and the patient interface shell. 18. The respiratory patient interface assembly of claim 1, further comprising nasal prongs or a nasal cushion. 19. The respiratory patient interface assembly of claim 1, wherein the patient interface shell further comprises a vent. 20. The respiratory patient interface assembly of claim 1, wherein the at least one flexible sealing lip is positioned on an opposite side of the cushion from the seal-forming membrane. 21. A respiratory patient interface assembly for use in delivery of non-invasive positive airway pressure to a user comprising: a patient interface shell including an inner wall;a cushion including a seal-forming membrane structured to form a seal with the user's face, the cushion having at least one flexible sealing lip structured to extend radially inward from an inner periphery of the cushion; anda retaining ring coupled to the cushion and configured to attach the cushion to the patient interface shell,wherein the at least one flexible sealing lip is positioned to contact the inner wall when the cushion and the retaining ring are attached to the patient interface shell such that the at least one flexible sealing lip forms a seal with the inner wall. 22. The respiratory patient interface assembly of claim 21, wherein the patient interface shell further comprises a plurality of slots, and wherein the retaining ring includes a plurality of clips structured to engage with respective ones of the plurality of slots of the patient interface shell to retain the cushion in position with the patient interface shell. 23. The respiratory patient interface assembly of claim 22, wherein the patient interface shell comprises an outer wall spaced from the inner wall to define a channel such that the retaining ring extends into the channel when the retaining ring is engaged with the patient interface shell. 24. The respiratory patient interface assembly of claim 23, wherein the plurality of slots are positioned in the channel. 25. The respiratory patient interface assembly of claim 21, wherein the at least one flexible sealing lip is further structured to deform to provide a continuous airtight seal between the cushion and the patient interface shell, the at least one flexible sealing lip being further constructed and arranged to return to a relaxed state when the cushion is disassembled from the patient interface shell. 26. The respiratory patient interface assembly of claim 21, wherein a retaining portion extends inwardly from the inner periphery of the cushion parallel to the at least one flexible sealing lip, the retaining portion and the at least one flexible sealing lip being spaced apart such that the retaining ring is positioned between the at least one flexible sealing lip and the retaining portion when the retaining ring is engaged with the retaining portion. 27. The respiratory patient interface assembly of claim 21, wherein the cushion and the patient interface shell at least partially define a chamber, and wherein the at least one flexible sealing lip extends toward the chamber from the inner periphery of the cushion. 28. The respiratory patient interface assembly of claim 27, wherein the at least one flexible sealing lip extends past the inner wall and into the chamber. 29. The respiratory patient interface assembly of claim 21, wherein the at least one flexible sealing lip is deflected in a direction away from the patient interface shell when the cushion and the retaining ring are attached to the patient interface shell. 30. The respiratory patient interface assembly of claim 21, further comprising nasal prongs or a nasal cushion. 31. The respiratory patient interface assembly of claim 21, wherein the patient interface shell further comprises a vent.
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