Patent ID: 8141899

Claim:
A curtain airbag device comprising: a bag main body housed inside a head lining adapted to be disposed on a window upper edge of a vehicle, the main body deployable from a lower end of said head lining towards the vehicle interior when operated, said bag main body having a plurality of chamber sections that inflate when operated; a duct section that horizontally extends from an upstream end to a downstream end along said window upper edge above said chamber sections, said duct section for distributing an inflation gas from a gas supply device into the respective chamber sections, said duct section having an upper end and a lower end, the lower end of said duct section positioned above the lower end of said head lining when deployed; and an expansion area that extends from said duct section, the expansion area configured such that said expansion area extends below said lower end of said duct section when deployed, and pushes open the head lining during deployment, the expansion area partially connected to an adjacent upstream chamber section lying on an upstream side of the expansion area such that an upper portion of the adjacent upstream chamber section is horizontally in direct fluid communication with the expansion area and the expansion area is separated from an adjacent downstream chamber section in a horizontal direction.