An elbow assembly includes an elbow with an opening in a sidewall of the elbow. An anti-asphyxia valve (AAV) assembly is provided to the elbow. The opening in the sidewall of the elbow is configured to receive at least a portion of the AAV assembly. The elbow assembly further includes a support memb
An elbow assembly includes an elbow with an opening in a sidewall of the elbow. An anti-asphyxia valve (AAV) assembly is provided to the elbow. The opening in the sidewall of the elbow is configured to receive at least a portion of the AAV assembly. The elbow assembly further includes a support member with an atmospheric port. The support member is configured to be secured to a portion of the elbow and cover the opening. The AAV assembly is adapted to be secured to the elbow by the support member. In addition, the support member is configured so that an outer surface of the support member is substantially flush with an outer surface of the elbow when the support member is secured to the portion of the elbow.
대표청구항▼
1. A patient interface configured to deliver positive pressure gas for respiratory therapy to a patient to treat sleep disordered breathing, the patient interface comprising: a frame;a cushion provided to the frame and adapted to form a seal with a patient's face; andan elbow assembly configured to
1. A patient interface configured to deliver positive pressure gas for respiratory therapy to a patient to treat sleep disordered breathing, the patient interface comprising: a frame;a cushion provided to the frame and adapted to form a seal with a patient's face; andan elbow assembly configured to convey the positive pressure gas from an air delivery tube to the frame, the elbow assembly comprising: an elbow with an opening in a sidewall of the elbow;an anti-asphyxia valve (AAV) assembly provided to the elbow, the opening in the sidewall of the elbow being configured to receive at least a portion of the AAV assembly; anda support member with an atmospheric port, the support member being configured to be secured to a portion of the elbow and cover the opening, the AAV assembly being adapted to be secured to the elbow by the support member,wherein the support member is configured so that an outer surface of the support member is substantially flush with an outer surface of the elbow when the support member is secured to the portion of the elbow. 2. The patient interface of claim 1, wherein the AAV assembly is positioned adjacent to the atmospheric port and the atmospheric port includes a cylindrical wall member configured to be selectively engaged by a portion of the AAV assembly. 3. The patient interface of claim 1, wherein the support member and the AAV assembly are secured together by over-molding, gluing and/or a mechanical lock. 4. The patient interface of claim 1, wherein the AAV assembly includes a base portion and a flap portion hingedly provided to the base portion by way of a living hinge. 5. The patient interface of claim 1, wherein the elbow includes a first portion adapted to be secured to a frame of a mask assembly and a second portion structured to receive pressurized gas, and a first gas path is defined between the first and second portions. 6. The patient interface of claim 5 further comprising a second gas path defined between the first portion and the atmospheric port, wherein the atmospheric port is provided between the first and second portions. 7. The patient interface of claim 5, wherein the AAV assembly includes a flap portion to selectively allow either pressurized gas or ambient air to be directed to the first portion of the elbow, the flap portion being made of silicone or TPE. 8. The patient interface of claim 1, wherein the support member is adapted to contact the AAV assembly when securing the AAV assembly to the elbow. 9. The patient interface of claim 1, wherein the support member is securable to the elbow in only one orientation. 10. The patient interface of claim 1, wherein the outer surface of the support member is substantially flush with the outer surface of the elbow only when the support member is oriented in a predetermined direction relative to the elbow. 11. The patient interface of claim 1, wherein an entirety of the outer surface of the support member is substantially flush with an outer surface of the elbow when the support member is secured to the elbow. 12. The patient interface of claim 1, wherein the support member is generally U-shaped. 13. A patient interface configured to deliver positive pressure gas for respiratory therapy to a patient to treat sleep disordered breathing, the patient interface comprising: a frame;a cushion provided to the frame and adapted to form a seal with a patient's face; andan elbow assembly configured to convey the positive pressure gas from an air delivery tube to the frame, the elbow assembly comprising: an elbow having a first portion structured to engage with a mask frame and a second portion structured to receive pressurized gas;a first gas path defined between the first and the second portions;a port in communication with atmosphere and selectively manipulated between a first mode and a second mode, the port being in communication with the first portion of the elbow when in the first mode and not being in communication with the first portion of the elbow when in the second mode;a second gas path defined between the first portion and the port; andan anti-asphyxia valve (AAV) assembly, said AAV assembly including a flap portion and a frame assembly integrally supporting the flap portion, the flap portion being movable to selectively open and close the port, the flap portion and the frame assembly being configured to be inserted into and secured within the elbow through an opening in the elbow, the opening being positioned to receive gas flowing through the first gas path,wherein said flap portion assumes a closed position when pressurized gas less than or equal to a predetermined threshold is delivered to the second portion of the elbow, in which case the port communicates with the first portion via the second gas path, and said flap assumes an open position when pressurized gas above the predetermined threshold is delivered to the second portion, in which case the flap portion seals the port and the first portion is in communication with the second portion via the first gas path. 14. The patient interface of claim 13, wherein the frame assembly is supported adjacent the first portion of the elbow and/or the port of the elbow. 15. The patient interface of claim 14, wherein the frame assembly includes a main wall member including an outer perimeter engaged with a groove provided adjacent the first portion. 16. The patient interface of claim 15, wherein the main wall member is oriented within the port and includes a first aperture defining a part of the second gas path. 17. The patient interface of claim 16, wherein the flap portion is movably mounted near the first aperture of the main wall member. 18. The patient interface of claim 17, wherein the main wall member includes one or more cross ribs. 19. The patient interface of claim 18, wherein the main wall member is oriented toward the first portion and includes a second aperture having a seal portion structure adapted to seal against the mask frame upon assembly therewith. 20. The patient interface of claim 19, wherein the flap portion is hinged at a location remote from the main wall member. 21. The patient interface of claim 13, wherein the AAV assembly includes a base portion to support the flap portion, the base portion including a first shoulder portion to support the flap portion, wherein the base portion is seated on a second shoulder portion formed on the elbow, andwherein at least a part of the flap portion, when in the closed position, rests against the second shoulder portion. 22. The patient interface of claim 21, wherein the AAV assembly includes side wall portions extending from the base portion wherein the side wall portions have a geometry and/or shape that substantially matches that of an inside portion of the elbow. 23. The patient interface of claim 22, wherein the side wall portions are generally tapered down from the first portion towards the port. 24. The patient interface of claim 22, wherein the side wall portions are generally tapered down from the port toward the first portion. 25. The patient interface of claim 24, wherein the AAV assembly includes a top wall portion positioned opposite the base portion. 26. The patient interface of claim 25, wherein the top wall portion includes a stop on which the flap portion rests when the flap portion is in the open position, to sealingly close off the port. 27. The patient interface of claim 13, wherein the AAV assembly is configured to be inserted into and secured within the elbow as a unit through the opening in the elbow. 28. A patient interface configured to deliver positive pressure gas for respiratory therapy to a patient to treat sleep disordered breathing, the patient interface comprising: a frame;a cushion provided to the frame and adapted to form a seal with a patient's face; andan elbow assembly configured to convey the positive pressure gas from an air delivery tube to the frame, the elbow assembly comprising: a main body with a first end, a second end and a bend between the first and second ends, the first end being adapted to connect to the patient interface and the second end being adapted to connect to an air delivery tube;an opening in a sidewall of the main body;an anti-asphyxia valve (AAV) receivable through the sidewall opening and including a flap portion;a port open to atmosphere and arranged and sized to be closed by the flap portion when the positive pressure gas flows through the main body; anda support member configured to secure the AAV within the main body, the support member forming a portion of the bend and structured to be flush with and secured to an outer surface of the main body in only one orientation,wherein the port extends through the support member when the support member is secured to the main body. 29. The patient interface of claim 28, wherein at least part of the support member engages the main body between the bend and the second end of the main body and the support member is configured to secure the flap portion to the main body, wherein the flap portion is separable from the support member and the support member is removable from the main body. 30. The patient interface of claim 28 further comprising a member configured to prevent over-deflection of the flap portion through the port, wherein the flap portion is configured to selectively close the port depending on the presence of pressurized gas in the elbow assembly. 31. The patient interface of claim 28, wherein the flap portion comprises a flexible silicone or other elastic material. 32. The patient interface claim 28, wherein a first end and a second end of the support member are arcuate shaped and a radius of curvature of the arcuate shape at the first end is different from a radius of curvature of the arcuate shape at the second end of the support member, and the radius of curvature of the first end of the support member substantially matches a radius of curvature of an adjacent arcuate portion of the main body only when the support member is arranged in a particular orientation relative to the main body. 33. The patient interface claim 28, further comprising a member configured to prevent over-deflection of the flap portion through the port, and wherein: at least part of the support member engages the main body between the bend and the second end of the main body,the support member is configured to secure the flap portion to the main body,the flap portion is separable from the support member,the support member is removable from the main bodythe flap portion is configured to selectively close the port depending on the presence of pressurized gas in the elbow assembly,the flap portion comprises a flexible silicone or other elastic material,a first end and a second end of the support member are arcuate shaped,a radius of curvature of the arcuate shape at the first end is different from a radius of curvature of the arcuate shape at the second end of the support member, andthe radius of curvature of the first end of the support member substantially matches a radius of curvature of an adjacent arcuate portion of the main body only when the support member is arranged in a particular orientation relative to the main body. 34. The patient interface of claim 28, wherein the elbow assembly is connected to the air delivery tube by way of a swivel connection.
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