Importance

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Abstract

A respirator mask, including a body member of a thin rigid plastic material and having an inner surface conforming to the face of a user. The body member includes as an inner surface and at least one opening to receive a filter cartridge. A first over-molded member is formed of a flexible, rubber-like material and is over-molded on the inner surface of the body member to form an over-molded inner surface to fit and seal upon the face of the user. A second over-molded member is formed of a flexible rubber-like material and is over-molded within the at least one opening for receiving a filter cartridge. The second over-molded member includes at least one flange member extending inwardly around the cartridge opening and is flexible from a first position to seal to a cartridge member and to a second position to allow the cartridge member to pass through the flange and then return to the first position to lock the cartridge member within the cartridge opening. A cartridge member includes at least one sealing flange formed of a substantially rigid material and has a shape substantially complementary to the internally extending flange portion of the second over-molded member. The flange portion of the cartridge member is larger in diameter than the diameter of the flange portion of the second over-molded member to have the flange portion of the filter cartridge, when pushed against the flange portion of the second over-molded member distorting the flange portion of the second over-molded member to allow the flange portion of the filter cartridge passing through and being locked and sealed in position by the return of the flange portion of the second over-molded member to its original position.

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First Claim