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Breathing mask and mask cushion therefor

  • US 7,069,933 B2
  • Filed: 11/12/2003
  • Issued: 07/04/2006
  • Est. Priority Date: 07/26/1996
  • Status: Expired due to Fees
First Claim
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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.

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