Gas generator for air bag and air bag system
AssigneeDaicel Chemical Industries, Ltd.
InventorsNobuyuki Katsuda, Shogo Tomiyama
Life of this patent
Estimating the term…
Abstract
An air bag gas generator has a cylindrical member that permits reliable welding of the cylindrical member with an inner surface of a ceiling portion of a housing even if the welding surface is slightly misaligned. It furthermore permits welding in such a manner (a more stable manner) that unsteadiness does not occur in the area where the inner surface of the ceiling portion of the housing and the inner cylindrical member abuts. In the air bag gas generator, which includes the inner cylindrical member in the housing, the inner cylindrical member has a peripheral wall portion bent to form a flattened surface portion as an extension of the one of that cylindrical member where it joins the inner surface of the ceiling portion.
Claims8
A method of manufacturing an airbag gas generator including a housing having a diffuser shell provided with a gas discharge port, comprising;
- providing an inner cylindrical member having a peripheral wall, said inner cylindrical member having open ends;
- bending the peripheral wall at a portion adjacent to one of the open ends to form a flat surface that extends at an angle with respect to the peripheral wall;
- placing said inner cylindrical member onto an inner surface of the diffuser shell such that the flat surface is in contact with the inner surface;
- attaching said inner cylindrical member to an inner surface by welding said flat portion and the diffuser shell;
- providing a plate member around said inner cylindrical member, the plate member including a first circular portion defining a central hole and a circumferential wall portion formed at an outer edge of the first circular portion;
- positioning said plate member by engaging said central hole with at least one of the peripheral wall and an outer circumference of said flat portion;
- providing a cylindrical coolant member for at least one of cooling and filtering combustion gas generated when the gas generator operates;
- and
- positioning said cylindrical coolant member by engaging an inner circumferential surface of said cylindrical coolant member with an outer circumference of the circumferential wall portion.
Dependencies are inferred from the claim text.