Patent ID: 6951351

Claim:
An airbag for employment in a vehicle to protect a vehicle occupant facing the airbag, the airbag comprising: an upper bag portion ( 3 ) having an upper rear surface ( 3 c ) which cushions generally against the face of the vehicle occupant (H) as the airbag is inflated; and a lower bag portion ( 4 ) joined together with the upper bag portion ( 3 ) to form the airbag ( 1 ), the lower bag portion ( 4 ) having a lower rear surface ( 4 c ) which extends rearwardly of the upper rear surface to cushion generally against an abdomen (H 1 ) of the vehicle occupant (H), wherein a left end of the lower rear surface ( 4 c ) is joined with a left side portion ( 4 b ) by a left joining line including a plurality of arc shape portions ( 15 , 17 , 16 ) which have different radii and join continuously with each other, so that the left joining line is smoothly curved; wherein a right end of the lower rear surface ( 4 c ) is joined with a right side portion ( 4 b ) by a right joining line including a plurality of arc shape portions ( 15 , 17 , 16 ) which have different radii and join continuously with each other, so that the right joining line is smoothly curved; and wherein the volume of the lower bag portion ( 3 ) is greater than the volume of the upper bag portion ( 4 ).