A - Human Necessities – 62 – B
Patent
A - Human Necessities
62
B
A62B 18/02 (2006.01)
Patent
CA 2475854
A respirator (1) having a plurality of internal masks (2, 3) within an external mask (4), the inner masks (2, 3) being linked by ducts (8, 9) so as to direct the inhaled air from the outside of the mask to the oronasal area via an ocular mask. The oronasal mask (3) has a secondary valve (12) that is sprung so as to operate within the timeframe of the exhalation part of the breathing cycle, the exhaled air being ejected into the hollow outer body of the mask (4).
L'invention concerne un masque respiratoire (1) comportant une pluralit~ de masques internes (2, 3) int~gr~s dans un masque externe (4). Les masques internes (2, 3) sont reli~s par des canaux (8, 9) con×us pour orienter l'air inhal~ provenant de l'air ambiant vers la zone bucco-nasale, par l'interm~diaire d'un masque oculaire. Le masque bucco-nasal (3) comprend une valve secondaire (12) ~lastique, con×ue pour s'ouvrir au cours de la phase d'expiration du cycle respiratoire, l'air expir~ ~tant ~vacu~ dans la cavit~ du masque externe (4).
Fetherstonhaugh & Co.
The Secretary Of State For Defence
LandOfFree
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