Patent ID: 8419054

Claim:
An airbag that inflates using gas from an inflator, the airbag comprising: a normally open vent hole that is normally open; and an openable vent hole that can be opened or closed by a closing member, wherein the closing member closes the openable vent hole when the airbag begins to inflate, the airbag is a driver side airbag that inflates toward an occupant side of a vehicle steering wheel and, when the airbag inflates, the openable vent hole is disposed in a region extending toward the outside of the steering wheel from a rim of the steering wheel, and the normally open vent hole is disposed in a region extending toward the center of the steering wheel from the rim, and wherein, when the airbag inflates, the normally open vent hole is disposed in the airbag in a range 330 mm in diameter, which is substantially coaxial with the steering wheel.