Patent ID: 8096580

Claim:
A gas generator for an airbag device, comprising: an initiator that is activated by an impact on said vehicle; an ignition agent that is ignited by said initiator, said ignition agent being housed in an ignition agent housing chamber; and a gas generating agent that is ignited and burned by said ignition agent, said gas generating agent being housed in a combustion chamber, wherein an airbag is inflated by a gas generated through combustion of said gas generating agent, and wherein said ignition agent housing chamber defines an interior volume, the interior volume being filled with said ignition agent and an air space that is contiguous with said ignition agent, wherein said ignition agent occupies about 30% to about 50% of the interior volume of said ignition agent housing chamber, and the air space occupies about 70% to 50% of the interior volume of said ignition agent housing chamber.