Patent ID: 8459187
Filing Date: 2013-06-11
Classification: B60R

Abstract:
1. A gas generator, comprising: a housing having a gas discharge port, a combustion chamber cup member disposed, in the housing, such that an opening portion thereof covers a bottom surface of the housing, the combustion chamber cup member having a communication hole at least at a single portion in its peripheral wall surface thereof, a cover member covering an outer peripheral wall surface of the combustion chamber cup member including the communication hole, and including an enlarged-diameter portion at least at a peripheral edge of the opening portion facing a housing bottom surface, and a fragile portion formed in the enlarged diameter portion at a position opposing the communication hole in the radial direction, and a first combustion chamber formed inside the combustion chamber cup member and accommodating a first gas generating agent and a first igniter therein, at the time of activation, the cover member expanding and deforming mainly in the radial direction to form a gap between the peripheral wall surface of the combustion cup member and the cover member, which serves as a gas channel communicating the first combustion chamber and the outside of the first combustion chamber.