Respirator assembly

A - Human Necessities – 62 – B

Patent

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Details

A62B 18/04 (2006.01)

Patent

CA 2484647

A respirator assemby e.g. for NBC protection is formed from two separate sub- assemblies (1 and 2). The first sub-assembly (1) comprises a flexible hood (3) (or other suitable headgear), a rigid mounting ring (4) and a peripheral face seal (6). The second sub-assembly (2) comprises a face plate (7) with lens (8), oronasal mask (10) and inlet and outlet valves (15, 16), and is demountably attachable to the ring (4). The first sub-assembly can be worn on its own with the user breathing ambient air through the open front, the second sub-assembly being added if and when a hazard is encountered. The positioning of the face seal (6) in the first sub-assembly means that a comfortable and reliable fit can be ensured when that sub-assembly is donned prior to a mission, but the user is relieved of the physiological burden of wearing the complete respirator unless and until protection is required.

L'invention concerne un ensemble respirateur assurant une protection nucléaire, biologique et chimique (NBC). Cet ensemble respirateur est constitué de deux sous-ensembles séparés (1, 2). Le premier sous-ensemble (1) comprend une cagoule (3) (ou un autre type de protège-tête approprié), une bague de fixation rigide (4) et un joint mécanique périphérique (6). Le second sous-ensemble (2) comprend une plaque frontale (7) comportant un viseur (8), un masque bucco-nasal (10) et des vannes d'entrée et de sortie (15, 10). Cet ensemble est fixé à l'anneau (4) de manière libérable. Le premier sous-ensemble peut être porté tout seul et permet à l'utilisateur de respirer l'air ambiant à travers l'ouverture frontale, le second sous-ensemble étant ajouté en cas de danger. Le positionnement du joint mécanique (6) dans le premier sous-ensemble assure un ajustement confortable et fiable lorsque ce sous-ensemble est donné avant une mission, tout en évitant à l'utilisateur la charge physiologique que suppose porter le respirateur complet, lorsqu'il n'a pas besoin de protection.

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