Mask assembly
First Claim
1. A respiratory mask assembly for use in the delivery of non-invasive positive airway pressure to a user, comprising:
- a substantially rigid shell that includes a channel portion defined by an inner wall, an outer wall and a channel floor, the channel floor has at least one slot portion allowing access from the channel portion to a surface of the shell opposite to the channel floor;
a face-contacting cushion acting to space the shell away from the user'"'"'s face, said cushion having a retaining channel and a retaining lip adjacent the retaining channel, and a sealing tab extending from the cushion to engage a portion of the shell to provide a continuous airtight seal between the cushion and the shell; and
a retaining ring configured to secure the cushion to the shell, the retaining ring having a first portion including at least one clip configured to pass through the at least one slot portion such that an underside surface of the at least one clip engages a section of the shell when the retaining ring is positioned within the channel, and a flange extending from a second portion of the retaining ring, the flange being configured to be received within the retaining channel of the cushion.
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Accused Products
Abstract
A respiratory mask assembly for use in the delivery of non-invasive positive airway pressure to a user. The assembly includes a rigid shell having a channel portion defined by an inner wall, an outer wall and a channel floor, a face-contacting cushion acting to space the shell away from the user'"'"'s face and a sealing tab extending from the cushion to engage a portion of the shell to provide a continuous airtight seal between the cushion and the shell. A retaining ring within the mask assembly is configured to secure the cushion to the shell. The retaining ring has a first portion including at least one clip configured to pass through at least one slot portion such that an underside surface of the at least one clip engages a section of the shell when the retaining ring is positioned within the channel.
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Citations
17 Claims
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1. A respiratory mask assembly for use in the delivery of non-invasive positive airway pressure to a user, comprising:
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a substantially rigid shell that includes a channel portion defined by an inner wall, an outer wall and a channel floor, the channel floor has at least one slot portion allowing access from the channel portion to a surface of the shell opposite to the channel floor;
a face-contacting cushion acting to space the shell away from the user'"'"'s face, said cushion having a retaining channel and a retaining lip adjacent the retaining channel, and a sealing tab extending from the cushion to engage a portion of the shell to provide a continuous airtight seal between the cushion and the shell; and
a retaining ring configured to secure the cushion to the shell, the retaining ring having a first portion including at least one clip configured to pass through the at least one slot portion such that an underside surface of the at least one clip engages a section of the shell when the retaining ring is positioned within the channel, and a flange extending from a second portion of the retaining ring, the flange being configured to be received within the retaining channel of the cushion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
a base portion defining a cavity with a rear opening;
a pair of flange assemblies extending in an upward direction from the base portion and configured to provide support for a latching mechanism;
an air inlet tube connected to an upper central portion of the shell and having a port opening to an interior to supply breathable gas from a pressurized supply to an interior of the respiratory mask assembly;
at least one gas washout vent positioned on respective sides of the air inlet tube to exhaust gases from the respiratory mask assembly; and
at least one port configured to connect to at least one supply tube to permit the flow of at least one of medication and oxygen to the interior of the respiratory mask assembly.
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6. The respiratory mask assembly of claim 1, wherein the sealing tab engages an outer surface of the inner wall of the shell.
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7. The respiratory mask assembly of claim 1, wherein the sealing tab engages a top surface of the inner wall of the shell.
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8. The respiratory mask assembly of claim 1, further comprising a mechanism located in an interior portion of the shell and configured to separate intake and exhalation gas flow.
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9. A method for securing a cushion and shell in a respiratory mask assembly, comprising:
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providing a cushion on a retaining ring;
engaging a flange portion of the retaining ring between a channel portion and retaining lip of the cushion to provide a cushion and retaining ring assembly;
aligning the cushion and retaining ring assembly in a channel of a shell; and
inserting the cushion and retaining ring assembly into the channel of the shell such that at least one clip of the cushion and retaining ring assembly passes through a channel floor of the shell to engage an underside surface of the at least one clip to the shell. - View Dependent Claims (10, 11, 12, 13)
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14. A respiratory mask assembly for use in the delivery of non-invasive positive airway pressure to a user, comprising:
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a substantially rigid shell that includes a channel portion defined by an inner wall, an outer wall and a channel floor, the channel floor has at least one slot portion allowing access from the channel portion to a surface of the shell opposite to the channel floor;
a face-contacting cushion acting to space the shell away from the user'"'"'s face, said cushion having a retaining channel and a retaining lip adjacent the retaining channel, and a sealing tab extending from the cushion to engage a portion of the shell to provide a continuous airtight seal between the cushion and the shell; and
a retaining ring configured to secure the cushion to the shell, the retaining ring having a first portion including at least one clip configured to pass through the at least one slot portion such that an underside surface of the at least one clip engages a section of the shell when the retaining ring is positioned within the channel. - View Dependent Claims (15, 16, 17)
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Specification