Patent ID: 7422237

Claim:
An air bag device comprising: an airbag member, and an inflator that feeds gas into the airbag member to inflate and expand the airbag member; wherein the airbag member comprises: a front-side cloth, a reverse-side cloth to which the inflator is mounted thereon, wherein a part of a peripheral edge portion of the reverse-side cloth is sewn to the front-side cloth, and an intermediate cloth of a polygonal shape disposed between the front-side cloth and the reverse-side cloth, wherein the intermediate cloth comprises a gas inlet port that communicates to the inflator, and wherein the polygonal intermediate cloth has a peripheral edge portion defining a plurality of apex portions and a plurality of sewn portions along said peripheral edge portion, and wherein said sewn portions are sewn to said front-side cloth so as to be fixed to said front-side cloth and said plurality of apex portions are unsewn and free to move relative to the front-side cloth so as to permit gas to flow from one side of the intermediate cloth, through a passageway defined by the apex portions and the front-side cloth, and into a space provided on a second side of the intermediate cloth.