Cushion and mask therefor
First Claim
1. A mask cushion to sealingly connect a mask to a wearer'"'"'s face, the cushion comprising:
- a nasal bridge region, a cheek region and a lower region below the cheek region;
a substantially triangularly-shaped frame of resilient material having a first molded inwardly curved rim; and
a membrane of resilient material, said membrane being thinner and more flexible than said first rim, said membrane having a second molded inwardly curved rim, said second rim spaced a distance from said first rim, said distance grater than a thickness of the first rim, said distance measured when the mask is not in use, a portion of said second rim forming a face contacting seal,wherein the membrane has a thickness of about 0.35 mm and the rim has a thickness of about 1.5 mm.
3 Assignments
0 Petitions
Accused Products
Abstract
A nasal cushion (30) comprises a substantially triangularly shaped frame (32) from which extends a membrane (34). The frame (32) has a scalloped edge (36) by which the cushion (30) is affixed to a mask body. The membrane (34) has an aperture (38) into which the wearer'"'"'s nose is received. The membrane (34) is spaced away from the rim (40) of the frame (32), and its outer surface (41) is of substantially the same shape as the rim (40). Respective notches (42,44) receive the bridge of the wearer'"'"'s nose. The wearer'"'"'s nose is received through the aperture (38) into the chamber within the mask body (46). The seal forming portion (45) thus contacts both the surface of the wearer'"'"'s nose and a portion of the wearer'"'"'s face in the region between the base of the nose and the upper lip, and around the sides and over the bridge of the nose. The shape of the seal forming portion (45) is particularly suited to effectively seal the difficult region of the facial contour that is the crease between the sides of the nose and the face.
193 Citations
29 Claims
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1. A mask cushion to sealingly connect a mask to a wearer'"'"'s face, the cushion comprising:
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a nasal bridge region, a cheek region and a lower region below the cheek region; a substantially triangularly-shaped frame of resilient material having a first molded inwardly curved rim; and a membrane of resilient material, said membrane being thinner and more flexible than said first rim, said membrane having a second molded inwardly curved rim, said second rim spaced a distance from said first rim, said distance grater than a thickness of the first rim, said distance measured when the mask is not in use, a portion of said second rim forming a face contacting seal, wherein the membrane has a thickness of about 0.35 mm and the rim has a thickness of about 1.5 mm. - View Dependent Claims (2, 3, 4, 5)
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6. A mask for connection to a wearer'"'"'s face comprising:
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a mask body for connection with a supply of breathable gas; and a cushion secured to said mask body, the body and cushion forming a nose-receiving cavity, said cushion including; a nasal bridge region, a cheek region and a lower region; a substantially triangularly-shaped frame of resilient material having a molded inwardly curved rim; and a membrane also of resilient material, said membrane being relatively more flexible than said rim, said membrane and rim, in cross-section, being generally curved away from the wearer in use, said membrane arranged to generally cover the rim and being spaced a distance from an outer surface of said rim at least in one of the bridge region, the cheek region or the lower region, said distance greater than a thickness of the rim, said distance measured when the mask is not in use, a portion of said membrane forming a face contacting seal; wherein said seal portion is resiliently deformable towards said rim in use of said mask. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A mask for connection to a wearer'"'"'s face comprising:
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a mask body for connection with a supply of breathable gas; and a cushion secured to said mask body, the body and cushion forming a cavity, said cushion including; a frame of resilient material having a molded inwardly curved rim; and a membrane also of resilient material, said membrane being relatively more flexible than said rim, said membrane and rim, in cross-section, being generally curved so that the membrane presents a generally convex surface to the wearer'"'"'s face in use, said membrane arranged to generally cover the rim and at least a portion of the membrane being spaced a distance from an outer surface of said rim, said distance greater than a thickness of the rim, said distance measured when the mask is not in use, a portion of said membrane forming a face contacting seal; wherein said seal portion is resiliently deformable towards said rim in use of said mask, and wherein the mask body includes a strap attachment point on each lateral side thereof. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification