An air bag safety system for cushioning restraint of a vehicle occupant during an impact event. The safety system includes a variable depth inflatable air bag cushion having at least one vent opening. A cover element of substantially pliable material is located in overlying relation to the vent opening....http://www.google.com/patents/US6832778?utm_source=gb-gplus-sharePatent US6832778 - Air bag restraint including selectively operable venting elements
