Pyrotechnic inflator for an air bag

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 21/26 (2006.01) B01D 39/20 (2006.01) B01D 46/24 (2006.01)

Patent

CA 2146945

A pyrotechnic inflator for an air bag includes a housing for containing gas generating material for inflating an air bag. The housing has a wall formed of rigid, porous material and serves both as a filter for entrapping contaminants from the gas that is generated within as the gas passes outward through the wall into the air bag and cools the gas by absorbing heat therefrom. Gas generating material and an ignition train is hermetically sealed in a bag or packet inside the porous housing which serves triple duty as a solid pyrotechnic container, a gas filter and a gas cooler.

Dispositif de gonflage pyrotechnique pour coussin de sécurité pneumatique qui comprend une enveloppe pour les matières génératrices de gaz servant à gonfler le coussin de sécurité pneumatique. L'enveloppe comprend une paroi formée d'un matériau rigide et poreux servant à filtrer les contaminants emprisonnés du gaz produit à l'intérieur lorsque le gaz traverse la paroi pour gonfler le coussin de sécurité pneumatique, et à refroidir le gaz en absorbant la chaleur produite. La matière productrice de gaz et le train d'allumage sont hermétiquement scellés dans une pochette située à l'intérieur de l'enveloppe poreuse à trois fonctions, c'est-à-dire contenant pyrotechnique solide, filtre à gaz et refroidisseur de gaz.

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