Inflator with an auto-ignition cradle

• US 20080122207A1
• Filed: 11/23/2007
• Published: 05/29/2008
• Est. Priority Date: 11/22/2006
• Status: Active Grant

• Current Assignee: TK Holdings Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: TK Holdings Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Domazet, Slaven, Burns, Sean P., Quioc, Eduardo L.
• Granted Patent: US 7,537,241 B2
• Time in Patent Office: Days
• US Class Current: 280/741
• CPC Class Codes: B60R 2021/26064 characterised by auto-ignition means
• CPC Class Codes: B60R 2021/2648 comprising a plurality of combustion chambers or sub-chambers
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder

Abstract

A gas generating system includes an inflator that contains an auto-ignition cradle containing an auto-ignition composition. The cradle operatively and thermodynamically communicates with the exterior of the inflator and also resiliently contains the auto-ignition composition, thereby maximizing the ignitability of the auto-ignition composition in the event of a fire.

Claims

1. A gas generating system comprising:

an inflator containing a housing, an interior defined by said housing, said housing also defining an exterior about said inflator;

a gas generating composition within said interior;

a booster composition within said interior;

an auto-ignition composition for igniting said booster composition; and

an auto-ignition cradle fixed within said interior and in operative communication with said exterior, said cradle containing said auto-ignition composition,

wherein said auto-ignition composition is ignited by heat transferred from said auto-ignition cradle.

2. The gas generating system of claim 1 wherein the auto-ignition cradle physically communicates with said housing to provide thermodynamic communication therewith.

3. The gas generating system of claim 1 wherein the auto-ignition cradle extends through said housing to said exterior, to facilitate thermodynamic communication between said cradle and said exterior.

4. A vehicle occupant protection system containing the gas generating system of claim 1.

5. An inflator comprising:

a housing, an interior defined by said housing, said housing also defining an exterior about said inflator;

a gas generating composition within said interior;

a booster composition within said interior;

an auto-ignition composition for igniting said booster composition; and

an auto-ignition cradle fixed within said interior and in operative communication with said exterior, said cradle containing said auto-ignition composition,

wherein said auto-ignition composition is ignited by heat transferred from said auto-ignition cradle.

6. The inflator of claim 6 wherein the auto-ignition cradle physically communicates with said housing to provide thermodynamic communication therewith.

7. The inflator of claim 6 wherein the auto-ignition cradle extends through said housing to said exterior, to facilitate thermodynamic communication between said cradle and said exterior.

8. A vehicle occupant protection system containing the inflator of claim 6.

9. The inflator of claim 6 wherein said cradle contains a first resilient member and a second resilient member, wherein said auto-ignition composition is constrained between said first and second resilient members.

10. The inflator of claim 6 wherein said housing contains at least one aperture proximate to said cradle, and said cradle extends through said at least one aperture thereby providing thermodynamic communication with said exterior of said inflator.