Patent attributes
An airbag for an airbag device includes an outer bag and an inner bag inflatable inside the outer bag. The outer bag includes a driver-side wall for receiving the driver and a vehicle-side wall that is supported by a ring surface of a ring portion of the steering wheel at airbag deployment, and includes an inlet port of inflation gas and a mounting portion on the steering wheel. The inner bag includes a supply port for supplying the gas to the outer bag. The inner bag completes inflation prior to the outer bag, and the outer bag is inflated with the gas supplied from the supply port. The inner bag as inflated has such a shape that the rear portion protrudes farther rearward than a rear end of the ring surface, and that a height from the ring surface is greater in the rear portion than in the front portion.
