Patent ID: 8181990

Claim:
An airbag for use within a motor vehicle, comprising: a gas generator for supplying inflation gas; a lower chamber configured to be inflated directly by the gas generator; an upper chamber located above and proximate to the lower chamber; and a diffusing panel configured to separate the lower and upper chambers and to allow inflation gas to pass between the chambers; wherein the upper chamber is to be indirectly inflated by the gas generator supplying gas directly to the lower chamber and then to the upper chamber via the diffusing panel, and upon completed deployment will have an internal pressure lower than the deployed internal pressure of the lower chamber, wherein the diffusing panel, upon deployment of the airbag, includes at least two convex portions and at least one concave portion relative to the lower chamber to stabilize deployment, and wherein each convex portion successively alternates with one of the at least one concave portions along an entire length of the diffusing panel, wherein one end of the diffusing panel is fixed proximate to the gas generator and the other end of the diffusing panel is connected to a portion of the airbag remote from the gas generator and expected to contact an occupant.