Patent ID: 7516983
Filing Date: 2009-04-14
Classification: B60R,C06D

Abstract:
1. A gas generator, comprising: a housing made of metal and including an initiator shell and a closure shell; at least one combustion chamber formed in the housing and configured to be packed with a gas generant that generates a high temperature gas by burning; at least one filter member arranged around the at least one combustion chamber; at least one igniter located in the housing and configured to ignite and burn the gas generant in the at least one combustion chamber; and a plurality of gas discharge holes formed in the housing and configured to discharge gas generated in the at least one combustion chamber, wherein at least one of the initiator shell and the closure shell forming the housing includes a head portion of a semispherical form or an oval semispherical form and a cylindrical portion having a diameter D formed continuously from the head portion, a ratio H/D between the diameter D of the cylindrical portion and a distance H between bottoms of the head portions of the initiator shell and closure shell is in a range of 0.6-1.3, and the at least one filter member is configured so that a portion thereof around the gas discharge holes bulges inward to make the portion thick to prevent the at least one filter member from being damaged, and the filter member is configured so that, at each position along an axial direction of the gas generator, a thickness of the filter member is substantially the same along a circumference of the filter member.