A - Human Necessities – 62 – B
Patent
A - Human Necessities
62
B
A62B 18/10 (2006.01) A62B 7/12 (2006.01) A62B 17/04 (2006.01)
Patent
CA 2226099
Breathing equipment including a breathing mask, breathing hood (1) or the like, and a conduit (2) through which breathing gas is delivered to the mask or hood. The equipment also includes a valve means (4) which is normally closed in use and which when open connects the space in the mask or hood (1) with the surrounding atmosphere so that said atmosphere can be breathed. To this end, means (8, 11) are provided for detecting when the supply of breathing gas to the mask or the hood (1) has fallen beneath a given level and therewith open the valve means. The valve means (4) is suitably a pressure- controlled arrangement which opens when the pressure in the breathing gas conduit (2) has fallen beneath a predetermined value.
L'invention porte sur un appareil de respiration comportant un masque respiratoire, une enveloppe respiratoire (1) ou analogue, et un conduit (2) alimentant le masque ou l'enveloppe en gaz respiratoire. L'appareil comporte également un clapet (4) normalement fermé et qui en position d'ouverture relie l'espace intérieur du masque ou de l'enveloppe (1) à l'atmosphère extérieure pour permettre la respiration. A cette fin des moyens de détection (8, 11) détectent lorsque l'alimentation du masque ou de l'enveloppe (1) en gaz respiratoire est descendue au-dessous d'un seuil donné ce qui provoque l'ouverture du clapet. Le clapet (4) est de préférence constitué d'un dispositif commandé par la pression qui s'ouvre lorsque la pression dans le conduit (2) de gaz respiratoire est tombée au-dessous d'une valeur prédéterminée.
Buhlmann Pierre
Interspiro Ab
Ridout & Maybee Llp
LandOfFree
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