Patent ID: 7648163
Filing Date: 2010-01-19
Classification: B60R,C06D

Abstract:
1. A gas generator for an air bag, comprising: a housing having a gas discharge port; an inner cylinder provided inside the housing and defining therein an ignition means chamber, in which ignition means are accommodated, and a combustion chamber, in which a gas generating agent is accommodated, and separated from the ignition means chamber, the inner cylinder being provided with a first through hole that allows only the ignition means chamber to communicate with a chamber outside the inner cylinder, and a second through hole that allows only the combustion chamber to communicate with the chamber outside the inner cylinder; a cylindrical coolant/filter disposed within the chamber outside the inner cylinder, and between the combustion chamber and the gas discharge port so that combustion gas passes through the coolant/filter prior to discharge through the gas discharge port, a retainer including a lower peripheral wall, an upper peripheral wall, and an annular plane connecting the lower peripheral wall and the upper peripheral wall, the retainer being provided such that, wherein a first gap is defined between the cylindrical coolant/filter and the upper peripheral wall, and a second gap is defined between the cylindrical coolant/filter and the inner circumferential wall of the housing, the first gap and the second gap are provided between the upper peripheral wall and the gas discharge port.