公开(公告)号：EP0069441A3

公开(公告)日：1983-09-21

申请号：EP82301940

申请日：1982-04-15

申请人： THIOKOL CORPORATION

发明人： Davis, Leland E. ,  Schneiter, Fred E. ,  Dahle, David P. ,  Kirchoff, George F.

IPC分类号： B60R21/08 ,  F42B03/04

CPC分类号： B60R21/2644 ,  F42B3/04

摘要： An air bag inflator for an automobile includes an elongated, tubular housing (18) having a plurality of perforations (19) in its cylindrical wall for discharging gas. Within the housing are a gas generant composition, an igniter and filtering screens. The perforations are normally sealed with non-tempered aluminium foil (46) which is easily ruptured by 'the gas pressure when the inflator is ignited and which, in addition to serving as a hermetic seal for protecting the gas generant and igniter from moisture and dust, insures that the gas pressure will reach a certain, threshold level before being discharged into an air bag. In very cold weather the inflator attains its peak pressure considerably more slowly than in warm weather. As a result, the air bag may be inflated either too slowly or insufficiently to perform its intended purpose, In order to preclude this from happening at least some of the perforations (19) in the housing (18) are covered with an additional or buttressing layer of thicker non-tempered aluminium foil (86), so that the threshold gas pressure necessary to rupture these seals is raised. This shortens the time for attaining peak gas pressure within the tubular housing and results in faster, more satisfactory inflation of the air bag when the ambient temperature is low.