Mask and a vent assembly therefor
First Claim
1. A mask assembly for use with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal'"'"'s airways, the mask assembly comprising:
- a mask that is, in use, in fluid communication with a gas supply conduit; and
a gas washout vent assembly, wherein the gas washout vent assembly includes at least one gas washout orifice extending from an inner side of the vent assembly positioned, in use, adjacent the human or animal'"'"'s face to an outer side positioned, in use, adjacent the atmosphere;
wherein the gas washout orifice is open in use and a cross-sectional area of the orifice at the inner side vent assembly is larger than a cross-sectional area of the orifice at the outer side of the vent assembly; and
wherein the inner side of the vent assembly extends inside the mask or conduit and the outer side of the vent assembly extends outside the mask or conduit.
4 Assignments
0 Petitions
Accused Products
Abstract
A mask (10) for use with a system for supplying breathable gas pressurised above atmospheric pressure to a human or animal'"'"'s airways. The mask (10) includes a mask shell (12) which is, in use, in fluid communication with a gas supply conduit and a gas washout vent assembly (20). The gas washout vent assembly (20) includes at least one gas washout orifice (22) extending from a first side of the vent assembly (20) positioned, in use, adjacent the human or animal'"'"'s face and a second side positioned, in use, adjacent the atmosphere. The cross-sectional area of the orifice (22) at the first side is larger than the cross-sectional area of the orifice (22) at the second side.
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Citations
44 Claims
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1. A mask assembly for use with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal'"'"'s airways, the mask assembly comprising:
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a mask that is, in use, in fluid communication with a gas supply conduit; and
a gas washout vent assembly, wherein the gas washout vent assembly includes at least one gas washout orifice extending from an inner side of the vent assembly positioned, in use, adjacent the human or animal'"'"'s face to an outer side positioned, in use, adjacent the atmosphere;
wherein the gas washout orifice is open in use and a cross-sectional area of the orifice at the inner side vent assembly is larger than a cross-sectional area of the orifice at the outer side of the vent assembly; and
wherein the inner side of the vent assembly extends inside the mask or conduit and the outer side of the vent assembly extends outside the mask or conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A mask assembly for use with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal'"'"'s airways, the mask assembly comprising:
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a mask that is, in use, in fluid communication with a gas supply conduit; and
a gas washout vent assembly including at least one gas washout orifice extending from an inner side of the vent assembly positioned, in use, adjacent the human or animal'"'"'s face to an outer side positioned, in use, adjacent the atmosphere, wherein a cross-sectional area of the orifice at the inner side of the vent assembly is larger than a cross-sectional area of the orifice at the outer side of the vent assembly; and
wherein the orifice includes a first substantially cylindrical portion adjacent the inner side, a second substantially cylindrical portion adjacent the outer side and a tapering portion between the first substantially cylindrical portion and the second substantially cylindrical portion. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A mask for use with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal'"'"'s airways, the mask assembly comprising:
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a mask that is, in use, in fluid communication with a gas supply conduit; and
a gas washout vent assembly, the gas washout vent assembly including at least one gas washout orifice extending from an inner side of the vent assembly positioned, in use, adjacent the human or animal'"'"'s face to an outer side positioned, in use, adjacent the atmosphere, wherein a cross-sectional area of the orifice at the inner side of the vent assembly is larger than a cross-sectional area of the orifice at the outer side of the vent assembly;
wherein the vent assembly includes a plurality of said orifices therethrough and said orifices are separated from each other by at least the diameter of the orifice at the outer side of the vent assembly, and wherein the inner side of the vent assembly extends inside the mask or conduit and the outer side of the vent assembly extends outside the mask or conduit.
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23. A vent assembly for washout of gas from a mask or conduit used with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal, the vent assembly including at least one gas washout orifice extending from an inner side of the vent assembly placed, in use, adjacent the human or animal'"'"'s face to an outer side placed, in use, adjacent the atmosphere, the gas washout orifice being open in use, and a cross-sectional area of the orifice at the inner side of the vent assembly is larger than a cross-sectional area of the orifice at the outer side of the vent assembly;
- wherein the orifice includes a first substantially cylindrical portion adjacent the inner side of the vent assembly, a second substantially cylindrical portion adjacent the outer side of the vent assembly and a tapering portion between the first substantially cylindrical portion and the second substantially cylindrical portion;
wherein the second substantially cylindrical portion and the tapering portion are of approximately equal thickness in the axial direction of the orifice and are thicker than the first substantially cylindrical portion.
- wherein the orifice includes a first substantially cylindrical portion adjacent the inner side of the vent assembly, a second substantially cylindrical portion adjacent the outer side of the vent assembly and a tapering portion between the first substantially cylindrical portion and the second substantially cylindrical portion;
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24. A vent assembly for washout of gas from a mask or conduit used with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal, the vent assembly including at least one gas washout orifice extending from an inner side of the vent assembly placed, in use, adjacent the human or animal'"'"'s face to an outer side placed, in use, adjacent the atmosphere, wherein a cross-sectional area of the orifice at the inner side of the vent assembly is larger than a cross-sectional area of the orifice at the outer side of the vent assembly;
- wherein the vent assembly includes a plurality of said orifices therethrough and said orifices are separated from each other by at least the diameter of the orifice at the outer side and wherein the inner side of the vent assembly extends inside the mask or conduit and the outer side of the vent assembly extends outside the mask or conduit.
- View Dependent Claims (25, 26, 27)
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28. A mask assembly for use with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal'"'"'s airways, the mask assembly comprising:
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a mask that is, in use, in fluid communication with a gas supply conduit; and
a gas washout vent assembly located on one of the mask and the conduit, wherein the gas washout vent assembly comprises an elastic, deformable insert that can be removably inserted into an opening provided on one of the conduit and the mask, the insert including a first surface to engage an inner surface of the mask or conduit, a second surface to engage an outer surface of the mask or conduit and a groove between the first and second surfaces to receive an edge defining the opening of the mask shell or conduit;
wherein the insert includes at least one gas washout orifice, the orifice extending from an inner side of the insert positioned, in use, adjacent the human or animal'"'"'s face to an outer side of the insert positioned, in use, adjacent the atmosphere, wherein an axis defined within the orifice extends substantially linearly from the inner side of the insert to the outer side of the insert, and wherein the orifice does not substantially change shape upon application of pressurized gas. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. An assembly for use with a system for supplying breathable gas pressurized above atmospheric pressure to a patient'"'"'s airways, the mask assembly comprising:
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a plenum chamber including an air inlet tube that is, in use, in fluid communication with a gas supply conduit, a patient interface coupled to the plenum chamber and adapted to interface with the patient, and a gas washout vent assembly including at least one gas washout orifice extending from an inner side of the plenum chamber positioned, in use, adjacent the patient'"'"'s face to an outer side of the plenum chamber positioned, in use, adjacent the atmosphere, the orifice being open in use and having a cross-sectional area at the inner side that is larger than a cross-sectional area at the outer side, wherein the outer side of the orifice is substantially circular, the orifice includes a central portion connecting the inner and outer sides, the central portion having a cross-sectional area that varies along a length of the central portion, the plenum chamber is defined by a wall structure made of a relatively rigid material and the vent assembly is made of a relatively flexible material compared to the rigid material of the mask, the vent assembly comprises an insert that can be removably inserted into an opening on one of the plenum chamber and the conduit, the insert including a first surface to engage an inner surface of one of the plenum chamber and the conduit, a second surface to engage an outer surface of one of the plenum chamber and conduit, and a groove provided between the first and second surfaces to receive a rim of the opening;
an axis defined along the central portion extends substantially linearly from the first surface of the insert to the second surface of the insert;
the orifice does not change shape upon application of pressurized gas; and
a first end of the orifice is located proximate the opening of the plenum chamber or conduit at the first surface of the insert and a second end of the orifice is located proximate the opening of plenum chamber or conduit at the second surface of the insert. - View Dependent Claims (38, 39, 40, 41)
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42. A vent assembly for washout of gas from a mask or conduit used with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal, the vent assembly including at least one gas washout orifice extending from an inner side of the vent assembly placed, in use, adjacent the human or animal'"'"'s face to an outer side placed, in use, adjacent the atmosphere, the gas washout orifice being open in use, and a cross-sectional area of the orifice at the inner side of the vent assembly is larger than a cross-sectional area of the orifice at the outer side of the vent assembly;
- wherein the orifice includes a first substantially cylindrical portion adjacent the inner side of the vent assembly, a second substantially cylindrical portion adjacent the outer side of the vent assembly and a tapering portion between the first substantially cylindrical portion and the second substantially cylindrical portion;
wherein a thickness of the vent assembly is greater than an inner diameter of the orifice. - View Dependent Claims (43, 44)
- wherein the orifice includes a first substantially cylindrical portion adjacent the inner side of the vent assembly, a second substantially cylindrical portion adjacent the outer side of the vent assembly and a tapering portion between the first substantially cylindrical portion and the second substantially cylindrical portion;
Specification