Patent ID: 7458607

Claim:
An airbag, comprising: an outer panel for forming the airbag; an inner panel disposed inside the outer panel and partitioning an inner part of the outer panel into a plurality of chambers; a gas-discharging device for absorbing a shock by discharging gas from at least one of the chambers to an outside of the chamber, said gas discharging device comprising a venthole which has an essentially constant shape and size; and a limiting device for limiting the gas discharge by the gas-discharging device via the venthole until the chamber is expanded more than a predetermined amount, said limiting device comprising an attaching portion and a lid member which is in contact with and guided by the attaching portion in a manner wherein the lid member is maintained in a position with respect to the venthole by the attaching portion to maintain the venthole effectively closed until the lid member is moved with respect to the attaching portion in response to the chamber being expanded by more than a predetermined amount.