Bag in bag safety restraint with directional inflation

摘要

An air bag system for deploying from within a structural element 50 of a vehicle comprising an inflator 55 providing inflation gas in response to an activation signal, a main bag 65 in a folded condition configured for storage in an internal region behind a covering 52 of the structural element, wherein the main bag 65 has a distal end 66 configured to rupture a tear seam 53 in the covering 52, and a shielding bag 60 disposed over the inflator 55 and having a projection body 61 extending away from the inflator 55 to a remote edge within the main bag 65, wherein the projection body 61 is substantially continuous in the direction of the main bag 65 except for at least one gas passage 62 at the remote edge for coupling inflation gas from the inflator 55 to the main bag 65, wherein the main bag 65 has a fold proximate to the gas passage 62 so that inflation of the main bag 65 begins with the unfolding of the fold in a manner that displaces the main bag 65 toward the tear seam 53.