Exhalation valve for use in an underwater breathing device

A - Human Necessities – 62 – B

Patent

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Details

A62B 18/10 (2006.01)

Patent

CA 2609479

An underwater breathing device, such as a snorkel, may include an exhalation valve. The exhalation valve is configured to produce positive end-expiratory pressure in the airway of a user of the underwater breathing device in order to reduce the overall work of underwater breathing. The exhalation valve includes a plate defining an exhalation port. The exhalation valve also includes a flexible membrane that is sealable against a surface of the plate and is sized and positioned to be capable of sealing the exhalation port. The flexible membrane is configured to have a sealed position in which the flexible membrane seals the exhalation port such that substantially no exhaled air escapes the snorkel. The flexible membrane is also configured to have an unsealed position in which exhaled air escapes the snorkel.

L'invention concerne un dispositif respiratoire sous-marin, notamment un tuba, pouvant comprendre une valve expiratoire. Cette valve expiratoire est conçue pour produire une pression expiratoire finale positive dans le voies respiratoires d'un utilisateur du dispositif respiratoire sous-marin, de sorte à réduire le travail total de la respiration sous-marine. Cette valve expiratoire comprend une plaque définissant un port expiratoire. Cette valve expiratoire comprend également une membrane souple pouvant être scellée contre une surface de la plaque et dimensionnée et positionnée pour permettre de réaliser l'étanchéité de port expiratoire. La membrane souple est conçue pour avoir une position étanche dans laquelle la membrane souple permet de réaliser l'étanchéité du port expiratoire de sorte qu'il n'y ait sensiblement pas d'air expiré qui s'échappe du tuba. La membrane souple est également conçue pour pouvoir prendre une position non étanche dans laquelle l'air expiré s'échappe du tuba.

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