Patent ID: 8668224

Claim:
A check valve for an airbag disposed in an airbag device having an airbag that is normally folded and that is inflated and deployed in an emergency, and an inflator that supplies gas to the airbag, the airbag having first, second and third inflation chambers, and further having a duct portion including a first duct portion connecting with the first inflation chamber, a second duct portion connecting with the second inflation chamber and a third duct portion connecting with the third inflation chamber, the check valve for an airbag comprising: a tubular portion fixed to the first duct portion; and a pair of tongue-shaped portions connected to and extending in different directions from the tubular portion with one tongue-shaped portion located in the second duct portion and the other tongue-shaped portion located in the third duct portion, wherein the tubular portion and the duct portion have a gap therebetween, and the tubular portion has an end opposite to the tongue-shaped portions and a first sealing portion where the end of the tubular portion opposite to the tongue-shaped portions and the duct portion are sewn together, and a second sealing portion where an intermediate portion between the plurality of tongue-shaped portions and the duct portion are sewn together, and the gap between the tubular portion and the duct portion is sealed.