Breathing mask and mask cushion 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 region opposite the nasal bridge region;
a first membrane comprising a frame of resilient material having a first molded inwardly curved rim of said first membrane; and
a second membrane of resilient material, said second membrane being thinner and more flexible than said first membrane, said second membrane having a second molded inwardly curved rim, said second membrane curved rim spaced a distance from said first membrane curved rim, said distance greater than a thickness of the first molded inwardly curved rim, said distance measured when the mask is not in use, a portion of said second membrane curved rim forming a face contacting seal structured to present a convex sealing surface with the wearer'"'"'s face, wherein;
the first molded inwardly curved rim of said first membrane is approximately 1.5 mm thick, andthe second molded inwardly curved rim of the second membrane is approximately 0.35 mm thick.
1 Assignment
0 Petitions
Accused Products
Abstract
A full-face cushion (30B) 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 (30B) is affixed to a mask body (46) to form a full-face mask (60B). The membrane (34) has an aperture (38) into which the wearer'"'"'s nose is received. The member (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 and lips are 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 bottom lip and the chin, 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.
-
Citations
17 Claims
-
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 region opposite the nasal bridge region; a first membrane comprising a frame of resilient material having a first molded inwardly curved rim of said first membrane; and a second membrane of resilient material, said second membrane being thinner and more flexible than said first membrane, said second membrane having a second molded inwardly curved rim, said second membrane curved rim spaced a distance from said first membrane curved rim, said distance greater than a thickness of the first molded inwardly curved rim, said distance measured when the mask is not in use, a portion of said second membrane curved rim forming a face contacting seal structured to present a convex sealing surface with the wearer'"'"'s face, wherein; the first molded inwardly curved rim of said first membrane is approximately 1.5 mm thick, and the second molded inwardly curved rim of the second membrane is approximately 0.35 mm thick. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A CPAP treatment apparatus comprising:
-
a flow generator for the supply of gas at a pressure elevated above atmospheric pressure; a gas delivery conduit coupled to said flow generator; and a mask in turn coupled to said conduit, said mask including; 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 and mouth receiving cavity, the cushion including; a nasal bridge region, a cheek region and a region opposite the nasal bridge region; a first membrane of resilient material having a first molded inwardly curved rim; a second membrane having a second molded inwardly curved rim also of resilient material, said second membrane being relatively more flexible and longer than said first membrane, and being fixed to and extending away from said first membrane so as to have an inner surface spaced a distance from said first molded rim, wherein said distance is greater than a thickness of the first inwardly curved rim, said distance is measured when the mask is not in use, and a portion of said second molded rim forms a face contacting seal, said second membrane fully covers the first membrane, and said seal is generally coterminous with respect to said second molded rim and is resiliently deformable towards said first membrane in use of said mask. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification