Patent ID: 7651129

Claim:
A gas generator for a restraining device, comprising: a housing formed by joining and integrating a diffuser shell having a gas discharge port and a closure shell, the housing accommodating, therein, a gas generating agent, an igniter, and a cylindrical filter; the housing having, a top plate, a circumferential wall surface, a bottom plate, and a plurality of protruding portions concaved inwardly, each protruding portion being formed discontinuously and formed independently from one another, the plurality of portions being formed in at least one of an upper annular corner portion located at a boundary portion between the top plate and the circumferential wall surface and a lower annular corner portion located at a boundary portion between the bottom plate and the circumferential wall surface, part of the cylindrical filter being supported and fixed to the housing by engaging with the plurality of protruding portions, and defining a gap between an outer circumferential surface of the cylindrical filter and the gas discharge hole.