US Patent 10953837 Airbag apparatus

An airbag apparatus includes an airbag bag body that is inflated and expanded by a gas which is generated from an inflator. The airbag bag body includes an inner bag and an outer bag. The inner bag is inflated and expanded by the gas which is supplied from the inflator. The outer bag covers the inner bag and communicates with the inner bag via a communication hole. The outer bag has a depression part on a lower part of the outer bag in a state of being supplied with the gas through the communication hole from the inner bag and being inflated and expanded.