An airbag system includes a contact sensing element acted on by a gas generator to extend in the direction of airbag deployment. The contact sensing element carries a sleeve which initially covers gas openings on the generator and when the contact element is fully extended uncovers the openings to enable...http://www.google.fr/patents/US6428041?utm_source=gb-gplus-shareBrevet US6428041 - Airbag system for a motor vehicle
