Patent ID: 8328234

Claim:
An airbag inflator comprising: a pressure vessel, formed by integrating a diffuser to a base, having an igniter and a gas generating agent located therein, a filter disposed along an inner peripheral wall of the pressure vessel in press-fit engagement with the base, and an inner cover including a bent portion that contacts an inner wall of the filter to cover and retain said gas generating agent within the filter and the base, the filter having a layered structure constituted by an inner filter and an outer filter, the inner filter being of a cylindrical shape in which upper and lower end portions are formed in a tapered shape that decreases in height toward an outer peripheral side of the cylindrical shape, the outer filter being a wire mesh outer filter that is fitted over an outer peripheral surface of said inner filter excluding at least the upper and lower end portions formed in the tapered shape, and the outer filter having a slightly larger outer diameter than an inner diameter of said base, and wherein the bent portion of the inner cover is formed to a length that it remains in contact with the inner wall of the filter following activation of the inflator.