Patent ID: 8236112

Claim:
A gas generator comprising: a tubular housing in which an ignition device is attached at one end and a diffuser portion having a gas discharge port is provided at the other end; a tubular member having a combustion chamber for accommodating, therein, a gas generating agent that generates a combustion gas, the tubular member having a first end portion and a second end portion, and disposed and fixed inside the tubular housing such that the first end portion is oriented towards a side of the ignition device and the second end portion is oriented towards a side of the diffuser portion, and defining a tubular gap between the tubular member and the tubular housing leading to the gas discharge port, the tubular member including, a first gas passage hole formed in a peripheral wall portion of a side of the first end portion of the tubular member and communicating the combustion chamber and the tubular gap, a second gas passage hole formed in the peripheral wall portion on a side of the second end portion of the tubular member and communicating the combustion chamber and the tubular gap, and an opening portion formed between the first gas passage hole and the second gas passage hole, and communicating the combustion chamber and the tubular gap; a projecting portion provided on the peripheral wall portion corresponding to the opening portion of the tubular member such that the projecting portion projects into at least one of the combustion chamber and the tubular gap.