Breathing air filtration devices

A - Human Necessities – 62 – B

Patent

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Details

A62B 23/02 (2006.01) A62B 7/00 (2006.01) A62B 7/10 (2006.01)

Patent

CA 2581433

A nasal air filtration device includes a pair of either planar or concave- convex filters, a support structure incorporating a pair of generally annular bases or sleeves for supporting the filters, and a bridge that couples the bases or sleeves to maintain them in a desired spaced~apart relation and to determine a desired angular relationship. The support structure is insertable into the nasal cavities to position the filters within corresponding nasal cavities. Flexible rims maintain the support structure and the filters in spaced-apart relation to the surrounding nasal wall. The rims conform to surrounding nasal tissue to form seals. The rims can be selectively inclined to facilitate insertion and resist accidental removal. In certain embodiments the device is combined with a filter that covers the mouth to provide an air filtration system.

Un dispositif nasal de filtrage d'air comprend une paire de filtres planaires ou concaves / convexes, une structure de support comprenant une paire de bases ou de gaines généralement annulaires et un pont qui couple les bases ou gaines de manière à les maintenir dans une relation d'espacement spatial et à déterminer une relation angulaire désirée. La structure de support est insérable dans les cavités nasales de manière à positionner les filtres à l'intérieur des cavités nasales correspondantes. Des cercles souples maintiennent la structure de support et les filtres dans une relation d'espacement spatial par rapport à la paroi nasale environnante. Les cercles épousent la forme du tissu nasal de manière à former des joints étanches. Les cercles peuvent être inclinés sélectivement pour faciliter l'insertion et résister au retrait accidentel. Dans certains modes de réalisation, le dispositif est combiné à un filtre qui recouvre la bouche de manière à fournir un système de filtrage d'air.

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