Patent ID: 8087693
Filing Date: 2012-01-03
Classification: B60R

Abstract:
1. A gas generator, comprising: a cylindrical housing in which an ignition device is mounted on one end side and a diffuser portion having a gas discharge port is mounted on the other end side, a cylindrical member disposed and fixed inside the cylindrical housing, and a cylindrical gap being formed between the cylindrical member and an inner wall surface of the cylindrical housing and leading to the gas discharge port, an obstacle provided in the gap to limit a flow of gas passing axially through the gap, a first gas passage hole and a second gas passage hole being provided on a wall surface of the cylindrical member in the ignition device side and the obstacle side, respectively, a third gas passage hole provided on a wall surface of the cylindrical member between the diffuser portion and the obstacle, a gas generating agent accommodated inside the cylindrical housing including the inside of the cylindrical member, and the gas generating agent ignited and burned by actuation of the ignition device and when gas is generated, at least part of the gas flowing through the first gas passage hole into the gap, part of the gas, that has passed therethrough, flowing again into the cylindrical member through the second gas passage hole to aid the combustion of the gas generating agent, then flowing together with gas generated thereby through the third gas passage holes into the gap, and finally being discharged from the gas discharge port.