Patent ID: 8579322

Claim:
A curtain airbag system for a vehicle, comprising: a curtain airbag that is stored in a folded state in an upper edge portion of a portion of a vehicle body in which a side windshield is mounted, wherein the curtain airbag comprises: a gas supply passage that is deployed along the upper edge portion of the portion of the vehicle body in which the side windshield is mounted; a first deployment portion to which gas is supplied through the gas supply passage, so that the first deployment portion is inflated and deployed below the gas supply passage in the event of a side impact or rollover of the vehicle; a second deployment portion to which gas is supplied through the gas supply passage or the first deployment portion, so that the second deployment portion is deployed at a vehicle front side of the first deployment portion, in the event of at least rollover of the vehicle, the second deployment portion is deployed below the gas supply passage, as seen in the side view, such that a lower end portion of the second deployment portion is located below a belt line, and the second deployment portion includes two cells that are arranged in a longitudinal direction of the vehicle, the lower end of the second deployment portion extends beyond a lower end of the first deployment portion; and a concave deployment portion formed within the second deployment portion or in a part of a space between the second deployment portion and the gas supply passage as seen in a side view, the concave deployment portion being defined by a looped line; the looped line forming a stitched portion defined by a generally triangular shape that includes a base and is line-symmetrical; wherein the stitched portion provides a partition between a lower edge of the gas supply passage and upper end portions of the cells arranged in the longitudinal direction and operable to restrict deployment of a part of the second deployment portion or the part of the space between the second deployment portion and the gas supply passage.