EYEPIECE FOR A RESPIRATORY PROTECTION MASK, MASK PROVIDED WITH THE EYEPIECE AND HELMET AND SCAPHANDRE PROVIDED WITH THE MASK

摘要

The coupling assembly (A), designed to fit into the front aperture (11) of a respirator mask (2), has a generally cylindrical outer guide surface (22) which lies perpendicular to its positioning surface and fits against a front shoulder (12) in the aperture (11) on the assembly. The guide surface also has a peripheral groove containing a seal (24), e.g. toroid in shape with a circular cross-section. The assembly incorporates a respirator system (8) with at least one antechamber, an inhaler (26) and an exhalation valve (29). It can also have speech membrane (31) and/or a protective grille (32), which can form a one-piece unit with fixing elements, e.g. of a moulded synthetic material - a polyamide such as Noryl (RTM).