Patent ID: 7988192
Filing Date: 2011-08-02
Classification: B60R

Abstract:
1. A gas generator, comprising: a cylindrical housing having a gas discharge port and being closed at a first end and a second end opposite to the first end; an ignition device attached to the first one-end of the cylindrical housing; a first gas generating agent chamber defined inside the cylindrical housing at a position closer to the first end and filled with a first gas generating agent, a cylindrical filter provided in a space defined inside the cylindrical housing at a position closer to the second end; a second gas generating agent chamber defined by an inner circumferential surface of the cylindrical filter and filled with a second gas generating agent; and a retainer disposed between the first gas generating agent chamber and the second gas generating agent chamber, the retainer having an annular flat surface and an annular circumferential wall surface that protrudes from an inner circumferential edge of the annular flat surface, the annular flat surface abutting against an entire surface of one end of the cylindrical filter and the annular circumferential wall surface abutting against a portion of the inner circumferential surface at one end side of the cylindrical filter, an inner diameter of the second gas generating agent chamber being smaller than an inner diameter of the first gas generating agent chamber.