Patent attributes
An apparatus for helping to protect an occupant of a vehicle includes an airbag comprising a vent having a closed condition blocking inflation fluid flow through the vent, and an opened condition permitting inflation fluid to flow through the vent. The vent includes a vent opening formed in a panel of the airbag and a vent flap connected to the airbag panel adjacent to the vent opening. The vent flap is configured to block inflation fluid flow through the vent opening in the closed condition of the vent, and to permit inflation fluid flow through the vent opening in the opened condition of the vent. The vent flap includes a plurality of folds configured to form one or more pleats in the vent flap. The vent flap is held extending across and covering the vent opening in the closed condition of the vent. The vent flap is released and uncovers the vent opening in the open condition of the vent. In response to the vent flap being released in the open condition of the vent, the pleats are configured to unfold under the pressure of inflation fluid in the airbag to uncover the vent opening and permit inflation fluid to vent through the vent opening.
