Airbag assemblies with constrained stabilizer straps

• US 9,010,804 B2
• Filed: 03/15/2013
• Issued: 04/21/2015
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Witt, John F. Jr., Schnieder, David W., Kutchey, Michael, Fritz, Jamie R.
• Primary Examiner(s): FRISBY, KEITH J
• Application Number:
  US13/840,644
• Publication Number:
  US 20140265281A1
• Time in Patent Office: 767 Days
• Field of Search: 280/743.2, 280/732, 280/730.1
• US Class Current: 280/743.2
• CPC Class Codes: B60R 2021/23169 specially adapted for knee protection
• CPC Class Codes: B60R 2021/23386 External tether means
• CPC Class Codes: B60R 2021/23388 having ends which are movable or detachable during deployment
• CPC Class Codes: B60R 21/206 in the lower part of dashboards, e.g. for protecting the knees
• CPC Class Codes: B60R 21/2171 specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters B60R21/2176 takes precedence
• CPC Class Codes: B60R 21/2338 Tethers
• CPC Class Codes: B60R 21/237 characterised by the way they are folded

Abstract

An airbag assembly can include a stabilizer strap attached to an airbag, and the stabilizer strap can cooperate with a housing to prevent undesired rotation or skewing of the airbag during deployment. A portion of the stabilizer strap can be positioned at an interior of the housing and can interact with the housing to restrict an amount of the stabilizer strap that is permitted to extend to an exterior of the housing.

Claims

1. An airbag assembly comprising:

a housing that defines a deployment opening and a stabilizer opening;

an inflatable airbag cushion coupled to the housing and configured to be deployed from the housing through the deployment opening; and

a stabilizer strap coupled to the inflatable airbag cushion, the stabilizer strap comprising a first portion and a second portion, wherein the first portion is coupled to and disposed directly on an exterior surface of the inflatable airbag cushion and wherein the second portion extends distally from the first portion and is not disposed directly on the exterior surface of the inflatable airbag cushion, the stabilizer strap extending from an interior of the housing to an exterior of the housing through the stabilizer opening, wherein the second portion of the stabilizer strap comprises a first stopping element that is configured to be positioned at the interior of the housing to interact with the housing to restrict an amount of the stabilizer strap that is permitted to extend to the exterior of the housing, and wherein the second portion comprises a second stopping element that is configured to be positioned at the exterior of the housing and to interact with the housing to remain at the exterior of the housing throughout deployment of the airbag cushion.

2. The airbag assembly of claim 1, wherein the stabilizer strap comprises a fabric material and the first stopping element comprises stitching through the fabric material.

3. The airbag assembly of claim 1, wherein the stabilizer strap comprises a fabric material and the first stopping element comprises a separate piece of material attached to the fabric material.

4. The airbag assembly of claim 3, wherein the separate piece of material is sewn to the fabric material.

5. The airbag assembly of claim 3, wherein the separate piece of material comprises another fabric material.

6. The airbag assembly of claim 1, wherein the stabilizer strap comprises a fabric material and the first stopping element comprises a looped portion of the fabric material.

7. The airbag assembly of claim 1, wherein the stabilizer strap comprises a fabric material and the second stopping element comprises a separate piece of material that is attached to the fabric material.

8. The airbag assembly of claim 1, wherein the stabilizer strap comprises a fabric material and wherein the second stopping element comprises a portion of the fabric material that is doubled over to form a multi-layer region.

9. The airbag assembly of claim 1, wherein the housing is elongated in a longitudinal direction along a longitudinal axis, and wherein the stabilizer strap is configured to prevent skewing of the inflatable airbag cushion about a central rotational axis of the airbag assembly that is within a plane that bisects the longitudinal axis of the housing and is perpendicular to a direction of deployment of the inflatable airbag cushion.

10. An airbag assembly comprising:

a housing that defines a deployment opening;

an inflatable airbag cushion coupled to the housing and configured to be deployed from the housing through the deployment opening; and

a stabilizer strap comprising a proximal end portion at an interior of the housing and a distal end portion at an exterior of the housing, wherein the proximal end portion of the stabilizer strap is coupled to the inflatable airbag cushion and disposed directly on an exterior surface of the inflatable airbag cushion, wherein the stabilizer strap comprises a first stopping element disposed between the proximal and distal end portions of the stabilizer strap that is configured to restrict an amount of the stabilizer strap that is permitted to extend to the exterior of the housing, wherein the entire first stopping element extends distally from the proximal end portion away from the exterior surface of the inflatable airbag cushion, and wherein the distal end portion of the stabilizer strap comprises a second stopping element that is configured to interact with the housing to remain at the exterior of the housing throughout deployment of the airbag cushion.

11. The airbag assembly of claim 10, wherein the stabilizer strap comprises a fabric material and the first stopping element comprises stitching through the fabric material.

12. The airbag assembly of claim 10, wherein the stabilizer strap comprises a fabric material and the first stopping element comprises a separate piece of material attached to the fabric material.

13. The airbag assembly of claim 10, wherein the stabilizer strap comprises a fabric material and the first stopping element comprises a looped portion of the fabric material.

14. The airbag assembly of claim 10, wherein the stabilizer strap comprises a fabric material and the second stopping element comprises one or more of a portion of the fabric material that is doubled over to form a multi-layer region and a separate piece of material that is attached to the fabric material.

15. An airbag assembly comprising:

a housing that defines a deployment opening and a stabilizer opening;

an inflatable airbag cushion coupled to the housing and configured to be deployed from the housing through the deployment opening; and

a stabilizer strap comprising an attachment region that is coupled to the inflatable airbag cushion and disposed directly on an exterior surface of the inflatable airbag cushion, wherein the stabilizer strap extends from an interior of the housing to an exterior of the housing through the stabilizer opening, and wherein a portion of the stabilizer strap that is between the attachment region and the stabilizer opening comprises a stopping element that is configured to interact with the housing to restrict an amount of the stabilizer strap that is permitted to extend to the exterior of the housing, and wherein the stopping element extends distally from the attachment region and is not disposed directly on the exterior surface of the inflatable airbag cushion.

16. The airbag assembly of claim 15, wherein the stabilizer strap comprises a fabric material and the stopping element comprises stitching through the fabric material.

17. The airbag assembly of claim 15, wherein the stabilizer strap comprises a fabric material and the stopping element comprises a separate piece of material attached to the fabric material.

18. The airbag assembly of claim 17, wherein the separate piece of material is sewn to the fabric material.

19. The airbag assembly of claim 17, wherein the separate piece of material comprises another fabric material.

20. The airbag assembly of claim 15, wherein the stabilizer strap comprises a fabric material and the stopping element comprises a looped portion of the fabric material.