INFLATABLE AIRBAG ASSEMBLY WITH AN AIRBAG HOUSING VENT PANEL

• US 20110101663A1
• Filed: 10/29/2009
• Published: 05/05/2011
• Est. Priority Date: 10/29/2009
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Schneider, David W.
• Granted Patent: US 8,186,714 B2
• Time in Patent Office: Days
• US Class Current: 280/743.1
• CPC Class Codes: B60R 2021/23388 having ends which are movable or detachable during deployment
• CPC Class Codes: B60R 2021/2395 comprising means to control the venting
• CPC Class Codes: B60R 21/239 characterised by their venting means
• CPC Class Codes: B60R 21/276 with means to vent the inflation fluid source, e.g. in case of overpressure B60R21/30 takes precedence; venting means on inflatable member walls B60R21/239

Abstract

Vents in inflatable airbags can be used to soften airbags during deployment by allowing inflation gas to exit from the interior of the airbag. Airbag vents can be used in conjunction with vents in an airbag housing and a vent panel that can align with the airbag vent with the housing vent and cover the aperture of the housing vent.

Claims

1. An inflatable airbag assembly, comprising:

an airbag housing having a vent aperture;

a vent panel coupled to the airbag housing, wherein the vent panel covers the vent aperture of the airbag housing; and

an inflatable airbag coupled to the vent panel, wherein the inflatable airbag has a vent aperture,

wherein the vent panel aligns the inflatable airbag vent aperture and the airbag housing vent aperture and wherein in a packaged configuration, the vent panel retains the vent apertures in the aligned configuration, and

wherein during initial inflatable airbag deployment, the vent panel continues to retain the inflatable airbag vent aperture and the airbag housing vent aperture in the aligned configuration, and

wherein during inflatable airbag deployment with obstruction, the vent panel continues to retain the inflatable airbag vent aperture and the airbag housing vent aperture in the aligned configuration, and

wherein during inflatable airbag deployment without obstruction, the vent panel ceases to retain the inflatable airbag vent aperture and the airbag housing vent aperture in the aligned configuration.

2. The inflatable airbag assembly of claim 1, wherein when the assembly is in the packaged configuration, the vent panel blocks debris from entering the inflatable airbag via the airbag vent aperture.

3. The inflatable airbag assembly of claim 1, wherein the vent panel extends through the vent aperture of the airbag housing.

4. The inflatable airbag assembly of claim 1, wherein a portion of the vent panel is configured to rupture during inflatable airbag deployment.

5. The inflatable airbag assembly of claim 1, wherein during inflatable airbag deployment, a portion of the vent panel is retained on the inflatable airbag and another portion is retained on the airbag housing.

6. An inflatable airbag assembly, comprising:

an airbag housing having a vent aperture;

a plurality of mounting stems coupled to the bottom wall of the airbag housing;

an inflator coupled to the bottom wall of the airbag housing via the mounting stems;

a vent panel coupled to the bottom wall of the airbag housing via the mounting stems, wherein the vent panel covers the vent aperture of the airbag housing on an exterior side of the airbag housing vent aperture; and

,

an inflatable airbag coupled to the vent panel, wherein the inflatable airbag has a vent aperture,

wherein the vent panel aligns the inflatable airbag vent aperture and the airbag housing vent aperture and wherein in a packaged configuration, the vent panel retains the vent apertures in the aligned configuration, and

wherein during initial inflatable airbag deployment, the vent panel continues to retain the inflatable airbag vent aperture and the airbag housing vent aperture in the aligned configuration, and

wherein during inflatable airbag deployment with obstruction, the vent panel continues to retain the inflatable airbag vent aperture and the airbag housing vent aperture in the aligned configuration, and

wherein during inflatable airbag deployment without obstruction, the vent panel ceases to retain the inflatable airbag vent aperture and the airbag housing vent aperture in the aligned configuration.

7. The inflatable airbag assembly of claim 6, wherein the vent panel is coupled to the inflatable airbag at a perimeter of the inflatable airbag vent aperture.

8. The inflatable airbag assembly of claim 6, wherein the vent panel comprises a first side and a second side, and wherein in the packaged configuration, the first side is partially located on an interior side of the airbag vent aperture and partially located on an exterior side of the airbag vent aperture.

9. The inflatable airbag assembly of claim 6, wherein the vent panel comprises a rupture seam.

10. The inflatable airbag assembly of claim 9, wherein the rupture seam is configured to fail upon initiation of the inflator, such that the vent panel ceases to cover the airbag housing vent aperture.

11. The inflatable airbag assembly of claim 9, wherein the vent panel comprises a second rupture seam configured to allow the inflatable airbag to adopt a fully deployed configuration.

12. An inflatable airbag assembly, comprising:

an airbag housing having opposing lateral sidewalls, opposing longitudinal sidewalls, and a bottom wall, wherein the lateral sidewalls comprise a vent aperture;

a plurality of mounting stems coupled to the bottom wall of the airbag housing;

an inflatable airbag coupled to the bottom wall of the airbag housing, the inflatable airbag having a vent aperture; and

,

a vent panel, comprising;

a first side comprising a vent aperture, wherein the first side is coupled to the mounting stems at an exterior of the bottom wall of the airbag housing, extends through the vent aperture of the airbag housing, and is coupled to the inflatable airbag at a perimeter of the inflatable airbag vent aperture, such that the vent aperture of the first side is at least partially aligned with the vent aperture of the inflatable airbag vent aperture;

a middle portion adjacent to the first side, wherein the middle portion is partially wrapped around a rim of the lateral sidewall; and

,

a second side adjacent to the middle portion and opposite the first side, wherein the second side is coupled to the mounting stems at the exterior of the bottom wall of the airbag housing, the second side comprising a body that covers an exterior side of the vent aperture of the airbag housing,

wherein during initial inflatable airbag deployment, the vent panel continues to retain the inflatable airbag vent aperture and the airbag housing vent aperture in the aligned configuration, and

wherein during inflatable airbag deployment with obstruction, the vent panel continues to retain the inflatable airbag vent aperture and the airbag housing vent aperture in the aligned configuration, and

wherein during inflatable airbag deployment without obstruction, the vent panel ceases to retain the inflatable airbag vent aperture and the airbag housing vent aperture in the aligned configuration.

13. The inflatable airbag assembly of claim 12, wherein the middle portion comprises a rupture seam.

14. The inflatable airbag assembly of claim 13, wherein the rupture seam comprises perforations.

15. The inflatable airbag assembly of claim 12, wherein the vent panel first side comprises a mounting member that extends from the vent panel vent aperture to the mounting stems on the bottom side of the airbag housing.

16. The inflatable airbag assembly of claim 15, wherein the mounting member of the first side comprises a second rupture seam.

17. The inflatable airbag assembly of claim 16, wherein the wherein the vent panel second side comprises a mounting member that extends from the body of the second side to the mounting stems on the bottom side of the airbag housing.

18. The inflatable airbag assembly of claim 12, wherein the wherein the vent panel second side comprises a mounting member that extends from the body of the second side to the mounting stems on the bottom side of the airbag housing.

19. The inflatable airbag assembly of claim 17, wherein after the inflatable airbag has been deployed, part of the middle portion and part of the first side of the vent panel are coupled to the inflatable airbag.

20. The inflatable airbag assembly of claim 17, wherein after the inflatable airbag has been deployed, part of the middle portion, the body of the second side, and the mounting members of the first and second sides are coupled to the airbag housing.