Multi-chamber gas generating system

• US 8,240,709 B1
• Filed: 06/01/2010
• Issued: 08/14/2012
• Est. Priority Date: 05/29/2009
• Status: Active Grant

• Current Assignee: Joyson Safety Systems Acquisition, LLC
• Original Assignee: TK Holdings Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Quioc, Eduardo L.
• Primary Examiner(s): To, Toan
• Application Number:
  US12/791,155
• Time in Patent Office: 805 Days
• Field of Search: 280/740, 280/741, 280/742
• US Class Current: 280/741
• CPC Class Codes: B60R 2021/26076 characterised by casing
• 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

A gas generating system includes an outer housing portion defining a chamber therein, an end closure coupled to the housing portion to close the chamber, and a resilient seal positioned between the housing portion and the end closure to seal the chamber. The system is configured to permit a flow of pressurized gas from the chamber to an exterior of the outer housing portion along at least a portion of the seal.

Claims

1. A gas generating system comprising:

an outer housing portion defining a chamber therein;

an end closure coupled to the housing portion to close the chamber; and

a resilient seal positioned between the housing portion and the end closure to seal the chamber, wherein the system is configured to permit a flow of pressurized gas from the chamber to an exterior of the outer housing portion along at least a portion of the seal.

2. The gas generating system of claim 1 further comprising another outer housing portion defining another chamber therein, wherein the seal is positioned within the other chamber.

3. The gas generating system of claim 2 wherein a part of the outer housing portion is spaced apart from the other outer housing portion to define a gap therebetween, and wherein the other outer housing portion includes at least one gas exit aperture 14h formed therein and positioned in the gap to enable fluid communication between the other chamber and an exterior of the other outer housing portion.

4. The gas generating system of claim 3 further comprising a filter positioned in the gap and interposed between the seam and the at least one gas exit aperture.

5. The gas generating system of claim 2 wherein the outer housing portion is coupled to the other outer housing portion so as to seal the other chamber.

6. The gas generating system of claim 1 wherein a portion of the end closure is configured to deflect responsive to pressurized gases generated in the chamber impinging on the portion of the end closure, so as to form a gap at the seam for release of the generated gases from the chamber.

7. The gas generating system of claim 1 wherein a portion of the seal is configured to deform responsive to pressurized gases generated in the chamber impinging on the portion of the seal, so as to form a gap at the seam for release of the generated gases from the chamber.

10. The gas generating system of claim 1 wherein the seal is configured to fracture or decompose responsive to exposure to gases generated in the chamber, so as to form a gap at the seam for release of the generated gases from the chamber.

12. A vehicle occupant protection system comprising a gas generating system in accordance with claim 1.

13. An airbag system comprising a gas generating system in accordance with claim 1.

14. The gas generating system of claim 1 further comprising a gas generant material positioned in the chamber for use in generating the pressurized gas.

18. The gas generating system of claim 1 wherein the system is configured to enable formation of a gap between the seal and at least one of the housing portion and the end closure responsive to exposure of the seal to generated gases, to permit the flow of pressurized gas through the gap.

8. A gas generating system comprising:

an outer housing portion defining a chamber therein;

an end closure coupled to the housing portion to close the chamber; and

a resilient seal positioned between the housing portion and the end closure to seal the chamber, wherein the system is configured to permit a flow of pressurized gas from the chamber to an exterior of the outer housing portion along at least a portion of the seal,

wherein the seal is attached to one of the end closure and the outer housing portion, and wherein a portion of the seal is configured to detach from the of the end closure and the outer housing portion responsive to pressurized gases generated in the chamber impinging on the portion of the seal, so as to form a gap at the seam for release of the generated gases from the chamber.

9. A gas generating system comprising:

an outer housing portion defining a chamber therein;

an end closure coupled to the housing portion to close the chamber; and

a resilient seal positioned between the housing portion and the end closure to seal the chamber, wherein the system is configured to permit a flow of pressurized gas from the chamber to an exterior of the outer housing portion along at least a portion of the seal,

wherein the seal is attached to one of the end closure and the outer housing portion, and wherein a portion of the seal is configured to move from a first position between the end closure and the outer housing portion in which it blocks fluid communication between the chamber and an exterior of the second outer housing portion, to a second position in which the seal fails to block fluid communication between the chamber and the exterior of the second outer housing portion, so as to form a gap at the seam for release of the generated gases from the chamber responsive to pressurized gases generated in the chamber impinging on the portion of the seal.

11. A gas generating system comprising:

an outer housing portion defining a chamber therein;

an end closure coupled to the housing portion to close the chamber; and

a resilient seal positioned between the housing portion and the end closure to seal the chamber, wherein the system is configured to permit a flow of pressurized gas from the chamber to an exterior of the outer housing portion along at least a portion of the seal, and

wherein the outer housing portion includes a pair of opposed semi-circular end portions connected by a pair of substantially parallel walls.

15. A gas generating system comprising:

an outer housing portion defining a gas generant combustion chamber therein;

an end closure coupled to the housing portion to close the chamber; and

a resilient seal positioned between the housing portion and the end closure to prevent fluid communication between the chamber and an exterior of the outer housing portion prior to activation of the gas generating system.

16. A vehicle occupant protection system comprising a gas generating system in accordance with claim 15.

17. An airbag system comprising a gas generating system in accordance with claim 15.