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12. 发明授权

US5503806A Varying permeability filter for airbag inflator 失效
标题翻译：用于气囊充气机的不同渗透性过滤器
公开(公告)号：US5503806A
公开(公告)日：1996-04-02
申请号：US280487
申请日：1994-07-26
申请人： Brian H. Fulmer , Todd S. Parker
发明人： Brian H. Fulmer , Todd S. Parker
IPC分类号： B01D46/00 , B01D46/24 , B60R21/26 , B60R21/264 , B01J19/14
CPC分类号： B60R21/2644 , B01D46/0043 , B01D46/24 , B01D2273/20 , B01D2275/30 , B01D2279/10
摘要： A new and improved airbag inflator including a varying permeability filter. The inflator includes a housing for holding gas generating materials and has an outer diffuser wall with a plurality of discharge or diffuser ports arranged to direct the gas into an airbag for rapid inflation. The housing includes a ring of diffuser ports spaced apart around the periphery of the outer diffuser side wall and these ports are generally closer to one of the top or bottom end walls of the container than they are to the opposite end wall. A new and improved gas filter of varying permeability is mounted in the housing inside the periphery of the outer diffuser wall adjacent to the ring of ports. The annular filter has a gas permeability characteristic that varies between a maximum permeability rating in a first region farthest away from the ring of ports to a minimum permeability rating adjacent a second region closer to the ports. The varying permeability areas tend to equalize or even out the gas flow over the entire available flow cross-section of the filter so that blow-through or burn holes do not develop. Moreover, the more uniform and even flow through the entire available flow cross-section results in a maximum of filtering and entrapment of contaminants as well as excellent cooling of the hot gases with the least flow resistance overall to provide rapid inflation of the airbag during deployment.
摘要翻译：一种新的改进的气囊充气机，包括一个变化的渗透性过滤器。充气机包括用于保持气体发生材料的壳体，并且具有外部扩散器壁，该外部扩散器壁具有布置成将气体引导到气囊中以用于快速充气的多个排放口或扩散器口。壳体包括围绕外扩散器侧壁的周边间隔开的扩散器端口环，并且这些端口通常比它们相对的端壁更靠近容器的顶端或底端壁之一。具有不同渗透性的新型和改进的气体过滤器安装在与端口环相邻的外部扩散器壁的外围的壳体内。环形过滤器具有气体渗透性特性，其在距离端口环最远的第一区域中的最大磁导率额定值与靠近端口的第二区域附近的最小渗透率等级之间变化。不同的渗透率区域趋向于使过滤器的整个可用流动横截面上的气体流量均衡或均匀，从而不会产生吹气或燃烧孔。此外，通过整个可用流动横截面的更均匀和均匀的流动导致污染物的过滤和捕获的最大化以及总体上具有最小流动阻力的热气体的优异冷却，以在展开期间提供气囊的快速充气。

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