Mask system
First Claim
1. A full-face mask system for delivering a supply of breathable gas at positive pressure to a patient'"'"'s airways to treat a respiratory disorder, the mask system comprising:
- a shroud;
a cushion module that engages the shroud, the cushion module including a frame of relatively rigid, polycarbonate material and a full-face cushion of relatively soft, elastomeric material, said full-face cushion being adapted to engage the patient'"'"'s face generally along nasal bridge, cheek, and chin regions of the patient'"'"'s face, the frame including an opening and the frame at least partly defining a breathing chamber, the full-face cushion including a base wall provided to the frame, an undercushion layer extending away from the base wall, and a membrane provided to cover the undercushion layer, the undercushion layer being provided in a nasal bridge region of the full-face cushion, the undercushion layer not being provided in at least a part of the chin region;
an elbow connected to the frame in a releasable and rotatable manner, the elbow including a gas washout vent arrangement, and an anti-asphyxia valve, the elbow including a first end portion and a second end portion, the second end portion having a swivel joint adapted to be connected to an air delivery tube, the vent arrangement comprising a vent insert that is adapted to be supported within an outlet opening in the elbow, the vent insert having a plurality of vent holes, the elbow including a port that is selectively closed by a flap portion of the anti-asphyxia valve depending on the presence of pressurized gas, the port being positioned between the swivel joint and the vent arrangement; and
headgear to maintain the mask system in position on the patient'"'"'s face, wherein;
the first end portion of the elbow including a distal end releasably inserted into the opening of the frame with a snap-fit, thereby creating a retention structure to retain the elbow with the frame, whereby the retention structure between the elbow and the frame also maintains the shroud in engagement with the frame, the shroud and the frame being structured to prevent relative rotation when the elbow is snap-fitted to the frame, andthe shroud includes an interfacing structure configured and shaped to hold the cushion module in an operative position with respect to the patient'"'"'s face, the interfacing structure being positioned along an inner side of the shroud that contacts the frame of the cushion module.
3 Assignments
0 Petitions
Accused Products
Abstract
A mask includes a shroud; a cushion module that engages the shroud, the cushion module including a frame and a full-face cushion adapted to engage the patient'"'"'s face generally along nasal bridge, cheek, and chin regions of the patient'"'"'s face, the frame at least partly defining a breathing chamber; an elbow connected to the frame in a releasable and rotatable manner, the elbow being adapted to be connected to an air delivery tube to deliver breathable gas to the patient; and headgear removably attachable to the shroud, wherein: the frame includes an opening, the elbow including a distal end releasably inserted into the opening of the frame with a snap-fit, thereby connecting the elbow to the frame, whereby the connection between the elbow and the frame also maintains the shroud in engagement with the frame.
771 Citations
30 Claims
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1. A full-face mask system for delivering a supply of breathable gas at positive pressure to a patient'"'"'s airways to treat a respiratory disorder, the mask system comprising:
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a shroud; a cushion module that engages the shroud, the cushion module including a frame of relatively rigid, polycarbonate material and a full-face cushion of relatively soft, elastomeric material, said full-face cushion being adapted to engage the patient'"'"'s face generally along nasal bridge, cheek, and chin regions of the patient'"'"'s face, the frame including an opening and the frame at least partly defining a breathing chamber, the full-face cushion including a base wall provided to the frame, an undercushion layer extending away from the base wall, and a membrane provided to cover the undercushion layer, the undercushion layer being provided in a nasal bridge region of the full-face cushion, the undercushion layer not being provided in at least a part of the chin region; an elbow connected to the frame in a releasable and rotatable manner, the elbow including a gas washout vent arrangement, and an anti-asphyxia valve, the elbow including a first end portion and a second end portion, the second end portion having a swivel joint adapted to be connected to an air delivery tube, the vent arrangement comprising a vent insert that is adapted to be supported within an outlet opening in the elbow, the vent insert having a plurality of vent holes, the elbow including a port that is selectively closed by a flap portion of the anti-asphyxia valve depending on the presence of pressurized gas, the port being positioned between the swivel joint and the vent arrangement; and headgear to maintain the mask system in position on the patient'"'"'s face, wherein; the first end portion of the elbow including a distal end releasably inserted into the opening of the frame with a snap-fit, thereby creating a retention structure to retain the elbow with the frame, whereby the retention structure between the elbow and the frame also maintains the shroud in engagement with the frame, the shroud and the frame being structured to prevent relative rotation when the elbow is snap-fitted to the frame, and the shroud includes an interfacing structure configured and shaped to hold the cushion module in an operative position with respect to the patient'"'"'s face, the interfacing structure being positioned along an inner side of the shroud that contacts the frame of the cushion module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A full-face mask system for delivering a supply of breathable gas at positive pressure to a patient'"'"'s airways to treat a respiratory disorder, the mask system comprising:
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a shroud; a cushion module that engages the shroud, the cushion module including a frame and a full-face cushion adapted to engage the patient'"'"'s face generally along nasal bridge, cheek, and chin regions of the patient'"'"'s face, the frame at least partly defining a breathing chamber; an elbow connected to the frame in a releasable and rotatable manner, the elbow being adapted to be connected to an air delivery tube to deliver breathable gas to the patient; and headgear directly or indirectly attachable to the shroud in a removable manner, wherein; the frame includes an opening, the elbow including a distal end releasably inserted into the opening of the frame with a snap-fit connection to retain the elbow with the frame, whereby the snap-fit connection between the elbow and the frame also maintains the shroud in engagement with the frame, the shroud and the frame having shapes that prevent relative rotation when the elbow is snap-fitted to the frame. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A full-face mask system for delivering a supply of breathable gas at positive pressure to a patient'"'"'s airways to treat a respiratory disorder, the mask system comprising:
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a shroud; a cushion module that engages the shroud, the cushion module including a frame of relatively rigid, polycarbonate material and a full-face cushion of relatively soft, elastomeric material, said full-face cushion being adapted to engage the patient'"'"'s face generally along nasal bridge, cheek, and chin regions of the patient'"'"'s face, the frame including an opening and the frame at least partly defining a breathing chamber, the full-face cushion including a base wall provided to the frame, an undercushion layer extending away from the base wall, and a membrane provided to cover the undercushion layer, the undercushion layer being provided in a nasal bridge region of the full-face cushion, the undercushion layer not being provided in at least a part of the chin region; and an elbow engaged with the frame in a releasable and rotatable manner, the elbow including a gas washout vent arrangement, and an anti-asphyxia valve, the elbow including a first end portion and a second end portion, the second end portion having a swivel joint adapted to be connected to an air delivery tube, the vent arrangement comprising a vent insert that is adapted to be supported within an outlet opening in the elbow, the vent insert having a plurality of vent holes, the elbow including a port that is selectively closed by a flap portion of the anti-asphyxia valve depending on the presence of pressurized gas, the port being positioned between the swivel joint and the vent arrangement, wherein; the shroud and the frame have complimentary shapes that provide for non-rotatable engagement relative to one another, and the first end portion of the elbow includes a distal end releasably inserted into the opening of the frame with a snap-fit, thereby creating a retention structure to retain the elbow with the frame, whereby the retention structure to retain the elbow with the frame also maintains the shroud in engagement with the frame in a non-rotatable manner due to the complimentary shapes. - View Dependent Claims (26, 27)
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28. A full-face mask system for delivering a supply of breathable gas at positive pressure to a patient'"'"'s airways to treat a respiratory disorder, the mask system comprising:
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a shroud; a cushion module that engages the shroud, the cushion module including a frame and a full-face cushion adapted to engage the patient'"'"'s face generally along nasal bridge, cheek, and chin regions of the patient'"'"'s face, the frame at least partly defining a breathing chamber; an elbow connected to the frame in a releasable and rotatable manner, the elbow being adapted to be connected to an air delivery tube to deliver breathable gas to the patient; and headgear removably attachable, directly or indirectly, to the shroud, wherein; the frame includes an opening, the elbow including a distal end releasably inserted into the opening of the frame with a snap-fit, thereby connecting the elbow to the frame, whereby the connection between the elbow and the frame also maintains the shroud in engagement with the frame, and the shroud and the frame are prevented from rotation relative to one another when the elbow is snap-fitted to the frame. - View Dependent Claims (29, 30)
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Specification