Airbags with sewn leak reducing panels

• US 8,851,507 B1
• Filed: 03/15/2013
• Issued: 10/07/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Kemp, John D., Rickenbach, Roger, Obray, G. Doyle, Fujiwara, Kazuki
• Primary Examiner(s): FRISBY, KEITH J
• Application Number:
  US13/843,386
• Publication Number:
  US 20140265265A1
• Time in Patent Office: 571 Days
• Field of Search: 280/728.2, 280/730.2, 280/728.1
• US Class Current: 280/728.2
• CPC Class Codes: B60R 2021/23538 Sewing
• CPC Class Codes: B60R 21/213 in vehicle roof frames or pillars
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/235 characterised by their material

Abstract

An airbag, or inflatable cushion assembly, can include an inflatable cushion and a throat liner. The throat liner can be coupled to an interior surface of the inflatable cushion at one or more coupling sites. The one or more coupling sites can include one or more panels that can be coupled to at least a portion of both of the inflatable cushion and the throat liner. The one or more panels can be configured to control or inhibit egress of an inflation gas at the one or more coupling sites.

Claims

1. An inflatable cushion assembly, comprising:

an inflator configured to generate inflation gas in response to predetermined conditions;

an inflatable cushion coupled to, and in fluid communication with, the inflator at a throat portion, wherein the inflatable cushion is a sealed cushion without vents, wherein the inflatable cushion comprises a front face and a rear face that meet at an edge, wherein the front face and the rear face define a void for receiving the inflation gas, and wherein the inflatable cushion further comprises a boundary seam adjacent to the edge of the inflatable cushion;

a throat liner comprising an aperture for passage of the inflation gas into the inflatable cushion, and a first exterior surface, wherein the throat liner is disposed at a position within the void of the inflatable cushion, wherein the first exterior surface is positioned at or adjacent to the boundary seam, and wherein the throat liner is coupled to the inflatable cushion at one or more coupling sites, the one or more coupling sites comprising;

a first panel coupled to an exterior surface of the front face of the inflatable cushion; and

a second panel coupled to an exterior surface of the rear face of the inflatable cushion, wherein stitching couples at least a portion of the first and second panels, the front and rear faces of the inflatable cushion, and the throat liner at the one or more coupling sites, wherein the stitching extends through each of the void of the inflatable cushion and the aperture of the throat liner, and wherein the first and second panels overlap at least the boundary seam of the inflatable cushion and the first exterior surface of the throat liner.

2. The inflatable cushion assembly of claim 1, wherein the first panel and the second panel do not substantially inflate upon inflation of the inflatable cushion.

3. The inflatable cushion assembly of claim 2, wherein the first panel and the second panel are integral.

4. The inflatable cushion assembly of claim 3, wherein both of the first panel and the second panel comprise silicone.

5. The inflatable cushion assembly of claim 3, wherein the first panel extends from the edge of the inflatable cushion along an exterior surface of the front face of the inflatable cushion and overlaps at least the boundary seam and the first exterior surface of the throat liner, and wherein the second panel extends from the edge of the inflatable cushion along an exterior surface of the rear face of the inflatable cushion and overlaps at least the boundary seam and the first exterior surface of the throat liner.

6. The inflatable cushion assembly of claim 5, wherein the stitching is substantially curved and comprises a first end and a second end, the first end and the second end spaced along a longitudinal length of the inflatable cushion and positioned at or adjacent to the edge of the inflatable cushion.

7. The inflatable cushion assembly of claim 6, wherein the stitching further comprises a first portion comprising a first transition point and a second transition point, wherein the first portion is positioned opposite from the edge of the inflatable cushion, and wherein the first portion stitchingly couples each of the first and second panels, the front and rear faces of the inflatable cushion, and the throat liner.

8. The inflatable cushion assembly of claim 7, wherein the stitching further comprises a second portion extending from both of the first transition point and the second transition point to both of the first end and the second end respectively, wherein the second portion stitchingly couples each of the first and second panels, and the front and rear faces of the inflatable cushion.

9. The inflatable cushion assembly of claim 2, wherein the first panel and the second panel are discrete.

10. The inflatable cushion assembly of claim 9, wherein at least one of the first panel and the second panel comprise foam tape.

11. The inflatable cushion assembly of claim 9, wherein the stitching is substantially curved and comprises a first end and a second end, the first end and the second end spaced along a longitudinal length of the inflatable cushion and positioned at or adjacent to the edge of the inflatable cushion.

12. The inflatable cushion assembly of claim 11, wherein the stitching further comprises a first portion comprising a first transition point and a second transition point, wherein the first portion is positioned opposite from the edge of the inflatable cushion, and wherein the first portion stitchingly couples each of the first and second panels, the front and rear faces of the inflatable cushion, and the throat liner.

13. The inflatable cushion assembly of claim 12, wherein the stitching further comprises a second portion comprising a third transition point and a fourth transition point, wherein the second portion extends toward the edge of the inflatable cushion from both of the first transition point and the second transition point to both of the third transition point and the fourth transition point respectively, and wherein the second portion stitchingly couples each of the first and second panels, and the front and rear faces of the inflatable cushion.

14. The inflatable cushion assembly of claim 13, wherein the stitching further comprises a third portion extending from both of the third transition point and the fourth transition point to both of the first end and the second end respectively, wherein the third portion stitchingly couples the front and rear faces of the inflatable cushion.

15. An airbag, comprising:

an inflatable cushion coupled to an inflator at a throat portion, wherein the inflatable cushion comprises a front face and a rear face that meet at an edge, wherein the front face and the rear face define a void for receiving the inflation gas, and wherein the inflatable cushion further comprises a boundary seam adjacent to the edge of the inflatable cushion, and wherein the inflatable cushion is a sealed cushion without vents;

a throat liner comprising an aperture for passage of the inflation gas into the inflatable cushion, and a first exterior surface, wherein the throat liner is disposed at a position within the void of the inflatable cushion, wherein the first exterior surface is positioned at or adjacent to the boundary seam, and wherein the throat liner is coupled to the inflatable cushion at one or more coupling sites comprising a panel, the panel comprising;

a first border,

a second border at a position opposite from the first border,

a middle portion positioned between the first border and the second border, and

a slit bisecting at least a portion of the panel at the middle portion, wherein the slit is substantially longitudinally aligned with the edge of the inflatable cushion, wherein at least a portion of the panel adjacent to the first border is coupled to an exterior surface of the front face of the inflatable cushion, wherein at least a portion of the panel adjacent to the second border is coupled to an exterior surface of the rear face of the inflatable cushion, wherein the first border and the second border overlap at least the boundary seam of the inflatable cushion and the first exterior surface of the throat liner, wherein stitching couples at least a portion of the panel, the front and rear faces of the inflatable cushion, and the throat liner at the one or more coupling sites, and wherein the stitching extends through each of the void of the inflatable cushion and the aperture of the throat liner.

16. The airbag of claim 15, wherein the panel does not substantially inflate upon inflation of the inflatable cushion.

17. The airbag of claim 15, wherein the panel further comprises silicone.

18. The airbag of claim 15, wherein the stitching is substantially curved and comprises a first end and a second end, the first end and the second end spaced along a longitudinal length of the inflatable cushion and positioned at or adjacent to the edge of the inflatable cushion.

19. The airbag of claim 18, wherein the stitching further comprises a first portion comprising a first transition point and a second transition point, wherein the first portion is positioned opposite from the edge of the inflatable cushion, and wherein the first portion stitchingly couples each of the first and second panel, the front and rear faces of the inflatable cushion, and the throat liner.

20. The airbag of claim 19, wherein the stitching further comprises a second portion extending from both of the first transition point and the second transition point to both of the first end and the second end respectively, wherein the second portion stitchingly couples each of the first and second paneland the front and rear faces of the inflatable cushion.

21. The airbag of claim 15, wherein the panel is configured to be coupled to the inflatable cushion at or adjacent to one or more cut features.

22. The airbag of claim 15, wherein the inflatable cushion further comprises a plurality of alignment landmarks spaced along a longitudinal length of the inflatable cushion at or adjacent to the edge of the inflatable cushion, wherein at least a portion of the plurality of alignment landmarks are configured to aid in positioning the panel at the one or more coupling sites.

23. The airbag of claim 22, wherein the panel further comprises a plurality of placement holes spaced along a longitudinal length of the panel at one or more sides of the slit, wherein at least a portion of the plurality of placement holes are configured to aid in aligning the panel with at least a portion of the plurality of alignment landmarks.

24. An airbag, comprising:

an inflatable cushion coupled to an inflator at a throat portion, the inflatable cushion comprising an edge, a boundary seam adjacent to the edge of the inflatable cushion, and a void for receiving an inflation gas, wherein the inflatable cushion is a sealed cushion without vents;

a throat liner comprising an aperture for passage of the inflation gas into the inflatable cushion, and a first exterior surface, wherein the throat liner is disposed at a position within the void of the inflatable cushion, wherein the first exterior surface is positioned at or adjacent to the boundary seam, and wherein the throat liner is coupled to the inflatable cushion at one or more coupling sites, the one or more coupling sites comprising;

a first panel coupled to an exterior surface of the inflatable cushion; and

a second panel coupled to an exterior surface of the inflatable cushion, wherein the edge of the inflatable cushion is positioned between the first panel and the second panel, wherein stitching couples at least a portion of the first and second panels, the inflatable cushion, and the throat liner at the one or more coupling sites, wherein the first and second panels overlap at least the boundary seam of the inflatable cushion and the first exterior surface of the throat liner, and

wherein upon inflation of the inflatable cushion, egress of the inflation gas is inhibited at the site of the stitching by the first panel and the second panel.

25. The airbag of claim 24, wherein the first panel and the second panel do not substantially inflate upon inflation of the inflatable cushion.

26. The airbag of claim 25, wherein the first panel and the second panel further comprise foam tape.

27. The airbag of claim 26, wherein the first panel and the second panel are adhesively coupled to the exterior surface of the inflatable cushion.

28. The airbag of claim 25, wherein the stitching is substantially curved and comprises a first end and a second end, the first end and the second end spaced along a longitudinal length of the inflatable cushion and positioned at or adjacent to the edge of the inflatable cushion.

29. The airbag of claim 28, wherein the stitching further comprises a first portion comprising a first transition point and a second transition point, wherein the first portion is positioned opposite from the edge of the inflatable cushion, and wherein the first portion stitchingly couples each of the first and second panels, the inflatable cushion, and the throat liner.

30. The airbag of claim 29, wherein the stitching further comprises a second portion comprising a third transition point and a fourth transition point, wherein the second portion extends toward the edge of the inflatable cushion from both of the first transition point and the second transition point to both of the third transition point and the fourth transition point respectively, and wherein the second portion stitchingly couples each of the first and second panels, and the inflatable cushion.

31. The airbag of claim 30, wherein the stitching further comprises a third portion extending from both of the third transition point and the fourth transition point to both of the first end and the second end respectively.