Patent ID: 8596679

Claim:
An air bag device comprising: an air bag having a folded configuration in a pre-deployment state; an inflator that supplies said air bag with a generated gas; an air bag case attached to said inflator, wherein said air bag is substantially disposed within said air bag case; a retainer fixing an opening portion of a peripheral edge of said air bag to said air bag case; and a deployment restriction sheet that covers said air bag from a rear side of a vehicle body to a front side of a vehicle body when said air bag is stored in said air bag case, wherein said deployment restriction sheet comprises a folded portion disposed over a central portion of said deployment restriction sheet, said folded portion being releasably joined to itself and said central portion so as to separate upon application of a first predetermined load, and said deployment restriction sheet further comprising a rupturable portion that ruptures upon application of a second predetermined load, said second load being greater than said first load, wherein said rupturable portion is disposed on a first end side of said deployment restriction sheet, said first end side being positioned on said front side of said vehicle body, and wherein said first end of said deployment restriction sheet is attached to a main body of said air bag at said front side of said vehicle, and a second end of said deployment restriction sheet is attached to said main body of said airbag at said rear side of said vehicle, wherein said folded portion is completely formed from a portion of said deployment restricted sheet that extend between said rupturable portion and said second end.