Single stage inflator

• US 20070001437A1
• Filed: 07/01/2005
• Published: 01/04/2007
• Est. Priority Date: 07/01/2005
• Status: Abandoned Application

• Current Assignee: Key Safety Systems, Inc. (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Key Safety Systems, Inc. (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Adams, John, Curtis, Anthony, Kelley, Michael, Hosey, Edward, Wall, Andrew
• Application Number:
  US11/171,688
• Publication Number:
  US 20070001437A1
• Time in Patent Office: Days
• US Class Current: 280/736
• CPC Class Codes: B60R 2021/26064 characterised by auto-ignition means
• CPC Class Codes: B60R 2021/2633 with a plurality of inflation levels
• 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

The present invention described hereafter provides a single stage inflator with a disk shaped inflator housing with one initiator having a single initiating squib located in an initiator housing, the initiator housing being offset relative to the centerline of the disk shaped inflator housing.

Claims

1. A single stage airbag inflator comprising:

a disk shaped housing;

a gas generant and an enhancer internal to said disk shaped housing; and

a single initiator, the single initiator having an initiator housing being located offset from a center of the disk shaped housing.

2. The single stage airbag inflator of claim 1 further comprising:

an auto ignition pellet internal to the disk shaped housing.

3. The single stage airbag inflator of claim 1 further comprising an annular cylindrical filter adjacent or in close proximity to annular sidewalls of the disk shaped housing.

4. The single stage airbag inflator of claim 3 wherein the single initiator is located offset to the center of the disk shaped housing and adjacent or in close proximity to an inside circumferential portion of the annular cylindrical filter.

5. The single stage airbag inflator of claim 3 further comprising a spacer filler adjacent one end of said disk shaped housing and inside said filter, said spacer filler having an opening or slot for the initiator housing to pass through.

6. The single stage airbag inflator of claim 5 wherein the single initiator is a squib and the initiator housing contains the squib and the enhancer.

7. The single stage airbag inflator of claim 6 wherein the initiator housing has a plurality of vent hole or openings oriented to direct igniter and enhancer exhaust away from the filter and into the gas generant.

8. The single stage airbag inflator of claim 1 wherein the enhancer weighs about 2.0 grams or less.

9. The single stage airbag inflator of claim 8 wherein the enhancer is in pellet form having a size of about 4 mm in diameter by about 1.2 mm in length.

10. The single stage airbag inflator of claim 1 wherein the gas generant is in pellet form having a size of about 8.0 mm in diameter by about 2.0 mm in length.

12. A single stage airbag inflator according to claim 1 further comprising an annular filter located inside of the disk shaped housing adjacent or in close proximity to an annular sidewall of the disk shaped housing.

13. A single stage airbag inflator according to claim 2 wherein the single initiator is located adjacent or in close proximity to an inside circumferential portion of the annular filter.

14. A single stage airbag inflator according to claim 13 wherein the initiator housing has a plurality of vent hole or openings oriented to direct gasses from the burning of the initiator and enhancer away from the annular filter and into the gas generant.

11. A single stage airbag inflator comprising:

a disk shaped housing;

a gas generant and an enhancer disposed inside of the disk shaped housing; and

a single initiator housing assembly comprising a single initiator disposed in an initiator housing, the single initiator housing assembly being spaced a distance from a center location of the disk shaped housing.

15. A single stage airbag inflator according to claim 11 wherein the enhancer weighs about 2.0 g or less and is in the form of a pellet having a size of about 4 mm in diameter by about 1.2 mm in length.

16. A single stage airbag inflator according to claim 11 wherein the gas generant is in the form of a pellet having a size of about 8.0 mm in diameter by about 2.0 mm in length.

17. A single stage airbag inflator comprising:

a disk shaped housing;

a gas generant and an enhancer disposed inside of the disk shaped housing;

an annular filter located inside of the disk shaped housing adjacent or in close proximity to an annular sidewall of the disk shaped housing and between the gas generant and the disk shaped housing; and

a single initiator housing assembly comprising a single initiator and the enhancer disposed in an initiator housing, the single initiator housing assembly being spaced a distance from a center location of the disk shaped housing, the single initiator being located adjacent or in close proximity to an inside circumferential portion of the annular filter, the initiator housing has a plurality of vent hole or openings oriented to direct gasses from the burning of the initiator and enhancer away from the annular filter and into the gas generant.

18. A single stage airbag inflator according to claim 17 wherein the enhancer weighs about 2.0 g or less and is in the form of a pellet having a size of about 4 mm in diameter by about 1.2 mm in length.

19. A single stage airbag inflator according to claim 17 wherein the gas generant is in the form of a pellet having a size of about 8.0 mm in diameter by about 2.0 mm in length.

20. A single stage airbag inflator according to claim 18 wherein the gas generant is in the form of a pellet having a size of about 8.0 mm in diameter by about 2.0 mm in length.