Abstract: Full facemask including a face seal configured to directly engage a face of an individual. The face seal defines a lens opening. The full facemask also includes a mask lens that is coupled to the face seal and disposed within the lens opening. The mask lens has a passage edge that defines a cartridge passage through the mask lens. The full facemask also includes a cartridge module having at least one of a filter or an air regulator. The cartridge module is disposed within the cartridge passage and circumscribed by the passage edge of the mask lens. The full facemask also includes a locking member that includes a first member surface that directly engages the mask lens and a second member surface that directly engages the cartridge module. The locking member secures the mask lens and the cartridge module in fixed positions with respect to each other.

Abstract: Full facemask including a face seal configured to directly engage a face of an individual. The face seal defines a lens opening. The full facemask also includes a mask lens that is coupled to the face seal and disposed within the lens opening. The mask lens has a passage edge that defines a cartridge passage through the mask lens. The full facemask also includes a cartridge module having at least one of a filter or an air regulator. The cartridge module is disposed within the cartridge passage and circumscribed by the passage edge of the mask lens. The full facemask also includes a locking member that includes a first member surface that directly engages the mask lens and a second member surface that directly engages the cartridge module. The locking member secures the mask lens and the cartridge module in fixed positions with respect to each other.

Abstract: A low-profile filter frame is disclosed for maintaining an open filter plenum configuration during normal operation, and for enabling quick and reliable negative pressure testing. The frame has upper and lower halves. A breathing tube in the lower half connects to a respirator port. The upper and lower halves snap together to maintain the structure in an assembled configuration. The halves also include features that bias the halves apart when the device is in the assembled configuration, thereby maintaining the breathing tube open. To perform a fit test, a force is applied to an outer surface of the upper half, which moves the halves together, in opposition to the bias, so that the upper half seals against the breathing tube. The frame can be provide in as a single-piece, with a living hinge connecting upper and lower halves, or the upper and lower halves can be separate pieces.

Abstract: A low-profile filter frame is disclosed for maintaining an open filter plenum configuration during normal operation, and for enabling quick and reliable negative pressure testing. The frame has upper and lower halves. A breathing tube in the lower half connects to a respirator port. The upper and lower halves snap together to maintain the structure in an assembled configuration. The halves also include features that bias the halves apart when the device is in the assembled configuration, thereby maintaining the breathing tube open. To perform a fit test, a force is applied to an outer surface of the upper half, which moves the halves together, in opposition to the bias, so that the upper half seals against the breathing tube. The frame can be provide in as a single-piece, with a living hinge connecting upper and lower halves, or the upper and lower halves can be separate pieces.