Gas generating system

1. A base assembly for a gas generating system, the assembly comprising:

a base having at least one opening formed therein, the base having an interior cavity;

an initiator assembly attached to the base so as to form a gas-tight seal surrounding the at least one opening; and

a retainer including a base portion directly attached to the base, the base portion including an opening into which a portion of the initiator assembly extends, the retainer including an inner wall extending from a first edge of the base portion into the base interior cavity, the retainer also including an outer wall extending from a second edge of base portion opposite the first edge into the base interior cavity

wherein the retainer inner wall defines a portion of the retainer opening, and wherein the initiator assembly extends along at least a portion of the inner wall, and

wherein the initiator assembly is attached to the retainer wall by welding.

2. The base assembly of claim 1 wherein an interference fit is formed between the retainer and the portion of the initiator assembly.

3. The base assembly of claim 1 wherein the initiator assembly is attached to the retainer inner wall along an end of the wall.

4. The base assembly of claim 1 wherein the base has a flat first portion and the retainer has a flat base portion, and wherein the retainer base portion is welded to the base first portion.

5. A base assembly for a gas generating system, the assembly comprising:

a base having at least one opening formed therein;

an initiator assembly attached to the base so as to form a gas-tight seal surrounding the at least one opening; and

a retainer attached to the base and including an opening into which a portion of the initiator assembly extends, wherein the retainer is attached to the initiator assembly along the retainer opening,

wherein an interference fit is formed between the retainer and the portion of the initiator assembly, and

wherein the initiator assembly includes a collar structured to surround the at least one base opening, and wherein the collar is welded to the base so as to surround the at least one base opening and so as to form the gas-tight seal.

6. A base assembly for a gas generating system, the assembly comprising:

a base having at least one opening formed therein;

an initiator assembly attached to the base so as to form a gas-tight seal surrounding the at least one opening; and

a retainer attached to the base and including an opening into which a portion of the initiator assembly extends, wherein the retainer is attached to the initiator assembly along the retainer opening, and

wherein the initiator assembly is welded to the base to form the gas-tight seal.

7. A base assembly for a gas generating system, the assembly comprising:

a base;

an initiator assembly welded to the base so as to form a gas-tight seal between the initiator assembly and the base; and

a retainer welded to the base and to the initiator assembly.

8. A gas generating system including a base assembly in accordance with claim 7 .

9. A vehicle occupant protection system including a gas generating system in accordance with claim 8 .

10. A gas generating system including a base assembly in accordance with claim 6 .

11. A vehicle occupant protection system including a gas generating system in accordance with claim 10 .

12. A gas generating system including a base assembly in accordance with claim 5 .

13. A vehicle occupant protection system including a gas generating system in accordance with claim 12 .

14. A gas generating system including a base assembly in accordance with claim 1 .

15. A vehicle occupant protection system including a gas generating system in accordance with claim 14 .