A - Human Necessities – 62 – B
Patent
A - Human Necessities
62
B
A62B 18/10 (2006.01)
Patent
CA 2466481
A filtering face mask that includes a mask body and an exhalation valve. The mask body is adapted to fit at least over the nose and mouth of a wearer to create an interior gas space when worn, and the exhalation valve is in fluid communication with the interior gas space. The exhalation valve comprises a valve seat that has a seal surface and an orifice through which an exhale flow stream may pass to leave the interior gas space. A flexible flap (22) is mounted to the valve seat such that the flap makes contact with the seal surface when the valve is in its closed position and such that the flap can flex away from the seal surface during an exhalation to allow exhaled air to pass through the orifice to ultimately enter an exterior gas space. The flexible flap has at least first (44) and second (46) juxtaposed layers where at least one of the layers is stiffer or has a different elastic modulus than the other layer.
Ce masque facial filtrant se compose d'un corps de masque et d'une clapet d'expiration. Le corps est configuré pour s'adapter au moins sur le nez et la bouche de son utilisateur afin de créer un espace intérieur pour les gaz lorsqu'il est porté, le clapet d'expiration étant en communication fluidique avec cet espace. Le clapet d'expiration est pourvu d'un siège qui comprend une surface d'étanchéité et un orifice par lequel passe le flux d'expiration quittant l'espace intérieur susmentionné. Un volet souple (22) est monté sur le siège du clapet, de manière à entrer en contact avec la surface d'étanchéité lorsque le clapet est fermé et à s'en éloigner lors de l'expiration afin de permettre à l'air expiré de passer par l'orifice et de s'évacuer finalement vers l'extérieur. Ce volet souple est constitué d'au moins deux couches juxtaposées (44, 46), l'une des couches au moins étant plus rigide que l'autre ou ayant un module d'élasticité différent.
Martin Philip G.
Xue Jianxian
3m Innovative Properties Company
Smart & Biggar
LandOfFree
Filtering face mask that uses an exhalation valve that has a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Filtering face mask that uses an exhalation valve that has a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filtering face mask that uses an exhalation valve that has a... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1612500