Patent ID: 8585085
Filing Date: 2013-11-19
Classification: B60R,C06D

Abstract:
1. A gas generator, comprising: a diffuser shell having a top plate and an upper circumferential wall plate provided with a gas discharge port, a closure shell having a bottom plate and a lower circumferential wall plate, a housing forming an outer shell and being obtained by joining and integrating the upper circumferential wall plate and the lower circumferential wall plate, inside the housing, an ignition device chamber defined by a cup-shaped container, which is positioned at a central part of the bottom plate of the closure shell, and accommodating an ignition device therein, a combustion chamber formed to enclose the ignition device chamber and being loaded with a gas generating agent, an annular or flat plate-shaped filter disposed to face the top plate, a retainer supporting the filter, the retainer including a bottom surface and a cylindrical wall surface extending from an outer circumferential edge of the bottom surface at least towards the top plate of the diffuser shell, the cylindrical wall surface having a combustion gas passage, the retainer supporting at least part of an outer circumferential surface and a lower surface of the filter by the bottom surface and the cylindrical wall surface, respectively, the retainer being fixed by directly or indirectly press-fitting the cylindrical wall surface to a circumferential wall plate which is formed by the upper circumferential wall plate and the lower circumferential wall plate, during actuation, when the housing is deformed in both directions of the top plate of the diffuser shell and the bottom plate of the closure shell, and the retainer and the filter move into attachment to the top plate of the diffuser shell, combustion gas passing through the filter, then passing through the combustion gas passage in the cylindrical wall surface of the retainer and being discharged from the gas discharge port.