Cushion and mask therefor

  • US 7,950,392 B2
  • Filed: 07/13/2007
  • Issued: 05/31/2011
  • Est. Priority Date: 07/26/1996
  • Status: Expired due to Fees
First Claim
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1. A nasal mask cushion to sealingly connect a mask to a wearer'"'"'s face, the cushion comprising:

  • a substantially triangularly-shaped frame of resilient material having a rim to substantially surround wearer s nose;

    a membrane also of resilient material, said membrane being thinner than and relatively more flexible than said frame, and being of the same general shape as said rim and fixed to and extending away from said frame so as to have an outer surface spaced from said rim, a portion of said outer surface forming a face contacting seal portion that is pre-shaped to generally match the contours of the wearer'"'"'s face, wherein the face contacting seal portion is structured such that it is not required to turn in on itself to conform with the wearer'"'"'s face, in use; and

    a nose-receiving cavity bounded by said frame and/or said membrane;


    the frame is sufficiently rigid to retain its shape and resist deformation so as to form a support structure for the membrane,said frame is not in contact with the wearer'"'"'s face in use,each of the frame and the membrane having an inner edge defining a respective aperture,each of the frame and the membrane has an outer edge, the outer edges of the frame and the membrane joining one another, andsaid seal portion is resiliently deformable towards said rim in use of said cushion.

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