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Breathing face mask

  • US 4,069,516 A
  • Filed: 07/21/1976
  • Issued: 01/24/1978
  • Est. Priority Date: 07/21/1976
  • Status: Expired due to Term
First Claim
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1. A face seal comprising, in combination with a body having an open side adapted to fit about facial portions of a user, said body defining a facial portion receiving cavity and having a marginal edge portion around said open side thereof, sealing means adapted to form a seal between said body and the face of a user thereof, said sealing means comprising a resiliently flexible perimetrical sealing element conformable in sealing relation with a face, and a resiliently flexible perimetrical connecting web joining said sealing element to said body in spaced relation thereto, said sealing element normally being suspended from said body by said web in inwardly spaced relation to said marginal edge portion therearound whereby said face mask is conformable in sealing relation to the face of a user independently of said body, said web being formed with a bead extending thereabout adjacent to said marginal edge portion, said bead projecting out of the plane of said web in a manner to mechanically load said sealing element upon predetermined buckling of said web.

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