Patent ID: 7036844

Claim:
A bumper airbag system for mounting on a motor vehicle comprising: a multi-chambered bumper airbag and; a source of inflation pressure adapted to inflate said airbag to a predetermined maximum inflation pressure; said multi-chambered bumper airbag comprising a first fabric member having a first perimeter, a second fabric member having a second perimeter, and a non-frangible seam connecting the first fabric member with the second fabric member near the first and second perimeters to define a chamber between the first and second fabric members; a first frangible seam connecting the first and second fabric members and located radially inward from the non-frangible seam to divide the chamber into a main chamber and a second chamber, said frangible seam having sufficient strength to withstand said maximum inflation pressure without rupturing; and at least one valve assembly disposed in the first fabric member for placing the main chamber in fluid communication with an inflating gas flow from said source of inflation pressure.