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Respirator mask with tapered filter mount and valve aligning pins and ears

  • US 5,505,197 A
  • Filed: 12/11/1992
  • Issued: 04/09/1996
  • Est. Priority Date: 12/11/1992
  • Status: Expired due to Term
First Claim
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1. A respirator mask, includinga unitary body member formed of a flexible rubberlike material and having an inner surface to fit and seal upon the face of a user;

  • the body member including at least one opening to receive a filter cartridge and including an internally extending flange portion forming the circumference of the opening;

    a filter cartridge formed of a substantially rigid material and including an inner grooved portion having a shape substantially complementary to the internally extending flange portion of the body member and with the flange portion for reception within the grooved portion of the cartridge to provide for the cartridge being locked within the opening in the body portion,means for compensating for manufacturing tolerances, said compensating means including the internally extending flange member having a tapered outer surface extending towards the outside of the mask and the grooved portion of the cartridge having a tapered surface complementary to the tapered surface of the internally extending flange andwherein the internally extending flange portion of the body member and the grooved portion of the cartridge forms a seal to prevent any passage of air from the outside to the inside of the mask, except through the filter cartridge.

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