Patent ID: 7631891

Claim:
A driver-side airbag device comprising: an airbag, folded and housed within a boss portion of a non-circular steering wheel; and an additional airbag adjacent to the airbag, wherein the airbag is deployed in conformity with a shape of the non-circular steering wheel when supplied with a gas by an inflator, wherein the airbag covers a center portion of the steering wheel, wherein the airbag includes a first vent hole that allows gas inside the airbag to pass directly to the external environment exposed to the steering wheel, and the additional airbag includes a second vent hole that allows gas inside the additional airbag to pass directly to the external environment exposed to the steering wheel, wherein the airbag mainly restrains a chest of a driver when deployed, and wherein the additional airbag primarily restrains a head of the driver when deployed.