Patent ID: 8590929

Claim:
A gas generator for a restraining apparatus of a vehicle, comprising: a combustion chamber; a tabular cushion member being disposed on a bottom portion of the combustion chamber; a solid gas generating agent as a gas generating source, being charged in the combustion chamber inside the gas generator together with the cushion member; the combustion chamber being substantially in a cup shape in which an inner diameter (D1) of an opening is smaller than an inner diameter (D2) of the bottom portion; the cushion member including a circular portion serving as a base part and a plurality of protrusions protruding from a peripheral edge of the circular portion; an outer diameter (d1) of the circular portion and the inner diameter (D1) of the opening satisfying a relationship of d1<D1; and an outer diameter (d2) including the protrusions satisfying relationships of d2>D1 and D2<D2.