Patent ID: 7487995
Filing Date: 2009-02-10
Classification: B60R

Abstract:
1. A gas generator for an air bag, comprising: a housing having a gas discharge port, a first combustion chamber provided with a first gas generating agent and a first iginition device inside the housing; and a second combustion chamber provided with a second gas generating agent and a second ignition device inside the housing, the second combustion chamber being separated from the first combustion chamber by a cup member disposed within the housing, the second gas generating agent and the second ignition device being disposed within the cup member, and the cup member being moved upon activation of the second ignition device, thereby forming a discharge passage for discharging a gas generated in the second combustion chamber, wherein the cup member has a closed through-hole in a lower end portion thereof, when the cup member is moved upon the activation of the second ignition device, the through-hole opens, thereby forming the discharge passage for discharging the gas generated in the second combustion chamber, and the second ignition device comprises a combination of a second igniter and a second igniter collar, and, by fitting an opening portion of the cup member onto the second igniter collar, the cup member is fixed into position such that the through-hole in the cup member is closed by the second igniter collar.