US Patent 9180830 Inflatable device for armrest of vehicle door

A door assembly for a vehicle includes a trim panel and an armrest core supported on the trim panel. An inflatable device is disposed on the armrest core for cushioning impact between an occupant of the vehicle and the armrest core during an impact of the vehicle. The inflatable device includes an inflation chamber defined by a backing, a cover, a pleated side extending from the backing to the cover, and a fabric side extending from the backing to the cover along the pleated side.