Patent ID: 7753404

Claim:
An airbag device comprising an airbag having at least one chamber which is configured to be filled with gas by a gas generator, the airbag defining a ventilation opening in fluid communication with the chamber to allow the gas to escape from the chamber, the ventilation opening is sealed by an airbag section, which is detachably mounted to a fastening member, and is configured as an insertion opening for the gas generator, wherein when the airbag section is mounted to the fastening member the airbag section is folded over to cover up the insertion opening obstructing the ventilation opening and preventing escape of the gas from the chamber through the ventilation opening, and when the airbag section becomes detached from the fastening member the airbag section moves uncovering the insertion opening to unobstruct the ventilation opening so that the gas escapes from the chamber through the ventilation opening.