Devices, systems and methods for operation of breathing...

A - Human Necessities – 62 – B

Patent

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A62B 18/00 (2006.01)

Patent

CA 2650568

A breathing system with a facepiece that includes a first port adapted to be placed in fluid connection with the outlet of a regulator assembly to introduce pressurized breathing gas into the facepiece; a second port adapted to be connected to an air purifying system; and an exhaust valve through which the user's exhausted breath can exit the facepiece. The breathing system also includes a pressure adjustment mechanism that includes a communication link in communicative connection with an actuator such that the exhaust pressure adjustment mechanism sets the internal facepiece pressure required to open the exhaust valve, independently of the respiration of the user, to a first pressure when the actuator is in the first state, to a second pressure when the actuator is in the second state. The first pressure is higher than the second pressure.

L'invention concerne un système de respiration avec une pièce faciale qui comprend un premier orifice pouvant être placé en connexion fluidique avec la sortie d'un ensemble régulateur permettant l'introduction d'un gaz de respiration pressurisé dans la pièce faciale; un second orifice adapté pour être connecté à un système de purification de l'air;et une soupape d'évacuation à travers laquelle l'air expiré par l'utilisateur sort de la pièce faciale. Le système de respiration comprend également un mécanisme d'ajustement de pression qui comprend une liaison de communication en connexion de communication avec un actionneur de telle sorte que le mécanisme d'ajustement de la pression d'expiration règle la pression de la pièce faciale interne requise pour ouvrir la soupape d'expiration, indépendamment de la respiration de l'utilisateur, à une première pression lorsque l'actionneur est dans le premier état et à une seconde pression lorsque l'actionneur est dans le second état. La première pression est supérieure à la seconde pression.

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