Inflatable airbag assemblies with lateral and longitudinal tethers

• US 8,371,612 B2
• Filed: 09/17/2009
• Issued: 02/12/2013
• Est. Priority Date: 09/17/2009
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Williams, Jeffrey D.
• Primary Examiner(s): Dickson, Paul N
• Assistant Examiner(s): Sliteris, Joselynn Y
• Application Number:
  US12/562,040
• Publication Number:
  US 20110062693A1
• Time in Patent Office: 1,244 Days
• Field of Search: 280/743.2
• US Class Current: 280/743.2
• CPC Class Codes: B60R 2021/23382 Internal tether means
• CPC Class Codes: B60R 21/205 in dashboards
• CPC Class Codes: B60R 21/206 in the lower part of dashboards, e.g. for protecting the knees
• CPC Class Codes: B60R 21/2338 Tethers

Abstract

Lateral and longitudinal internal tethers can be used to restrict an inflatable airbag to a predetermined shape when inflated. A longitudinal tether extends from a rear portion or throat portion of the airbag to a front face. The portion of the front face that cushions an occupant can have a concave or planar shape, depending on the lengths of the lateral and/or longitudinal tethers.

Claims

1. An inflatable airbag assembly, comprising:

an inflatable airbag having two opposing side faces, a rear face, and a front face;

a longitudinal tether coupled to the rear face and extending to the front face, wherein the longitudinal tether comprises a face-proximal portion and a throat-proximal portion, and

wherein the face-proximal portion comprises a face attachment region and a face-distal region, and wherein in a deployed configuration, the face attachment region of the face-proximal portion is vertically oriented,

wherein the throat-proximal portion comprises a first leg and a second leg,

wherein each leg comprises a throat coupling region and a throat-distal region,

wherein the throat-distal region of the first leg is vertically spaced from the throat-distal region of the second leg,

wherein each of the throat-distal regions of the first and second legs are coupled to opposing ends of the face distal region of the face-proximal portion of the longitudinal tether such that, when in a deployed configuration, the throat-distal region of the throat-proximal portion is vertically oriented; and

a lateral tether that is fixedly attached to each of the side faces and extends between the side faces,

wherein the longitudinal tether and the lateral tether are spaced from each other,

wherein the longitudinal tether and the lateral tether restrict an inflated shape of the inflatable airbag.

2. The inflatable airbag assembly of claim 1, wherein the rear face of the inflatable airbag comprises a throat portion, and wherein the throat coupling region of each leg is attached to the throat portion, and wherein the throat coupling region of each leg is horizontally oriented.

3. The inflatable airbag assembly of claim 1, wherein in the deployed configuration, a cushioning portion of the front face comprises a planar conformation.

4. The inflatable airbag assembly of claim 1, wherein each of the side faces forms an angle with a cushioning portion of the front face that is between about 80°

and about 100°

.

5. The inflatable airbag assembly of claim 1, wherein a portion of the face attachment region of the face-proximal portion is coupled to the front face, and wherein the portion of the face attachment region that is coupled to the front face comprises between about 15% and about 75% of a height of the front face.

6. The inflatable airbag assembly of claim 1, wherein the face attachment region of the face-proximal portion defines an occupant cushioning portion of the front face.

7. An inflatable airbag assembly, comprising:

an inflatable airbag having two opposing side faces, a rear face, and a front face;

a longitudinal tether coupled to the rear face and extending to the front face, wherein the longitudinal tether is coupled to the front face, and wherein the longitudinal tether comprises a face-proximal portion and a throat-proximal portion, and

wherein the face-proximal portion comprises a face attachment region and a face-distal region, and wherein in a deployed configuration, the face attachment region of the face-proximal portion is vertically oriented,

wherein the throat-proximal portion comprises a first leg and a second leg,

wherein each leg comprises a throat coupling region and a throat-distal region,

wherein the throat-distal region of the first leg is vertically spaced from the throat-distal region of the second leg,

wherein each of the throat-distal regions of the first and second legs are coupled to opposing ends of the face distal region of the face-proximal portion of the longitudinal tether such that, when in a deployed configuration, the throat-distal region of the throat-proximal portion is vertically oriented, and

wherein in a deployed configuration, the throat coupling region of the throat-proximal portion is horizontally oriented; and

,

a lateral tether that is fixedly attached to each of the side faces and extends between the side faces,

wherein the longitudinal tether and the lateral tether are spaced from each other,

wherein the longitudinal tether and the lateral tether restrict an inflated shape of the inflatable airbag.

8. The inflatable airbag assembly of claim 7, wherein the longitudinal tether comprises three pieces of material.

9. The inflatable airbag assembly of claim 8, wherein the face-proximal portion comprises a first piece of material, the first leg of the throat-proximal portion comprises a second piece of material, and the second leg of the throat-proximal portion comprises a third piece of material.

10. The inflatable airbag assembly of claim 7, wherein between attachment points at the front face and rear face, the longitudinal tether transitions along a longitudinal axis of the longitudinal tether from a folded configuration to a non-folded configuration.

11. The inflatable airbag assembly of claim 9, wherein each of the throat-distal regions of the first and second legs are folded at their attachment point to the face-proximal portion of the longitudinal tether, and

wherein each of the throat coupling regions of the first and second legs are not folded at their attachment points on the rear face of the inflatable airbag.

12. The inflatable airbag assembly of claim 7, wherein in the deployed configuration, an occupant cushioning portion of the front face comprises a planar conformation.

13. The inflatable airbag assembly of claim 7, wherein the rear face of the inflatable airbag comprises a throat portion, and wherein the throat-proximal portion of the longitudinal tether is attached to the throat portion.

14. The inflatable airbag assembly of claim 7, wherein the face attachment region of the face-proximal portion is curved.

15. The inflatable airbag assembly of claim 7, wherein the face attachment region of the face-proximal portion comprises a curved portion and a linear portion.

16. The inflatable airbag assembly of claim 7, wherein the throat coupling regions of the first and second legs of the throat-proximal portion of the longitudinal tether overlap at their attachment point on the rear face of the inflatable airbag.

17. An inflatable airbag assembly, comprising:

an inflatable airbag having two opposing side faces, a rear face, and a front face;

a longitudinal tether coupled to the rear face and extending to the front face, wherein the longitudinal tether comprises a face-proximal portion and a throat-proximal portion, and

wherein the face-proximal portion comprises a face attachment region and a face-distal region, and wherein in a deployed configuration, the face attachment region of the face-proximal portion is vertically oriented,

wherein the face-distal region of the face-proximal portion has opposing ends,

wherein the throat-proximal portion comprises a throat-distal region and a throat coupling region, and wherein in a deployed configuration, the throat coupling region of the throat-proximal portion is horizontally oriented,

wherein the throat-distal region of the throat-proximal portion extends from the opposing ends of face-distal region of the face-proximal portion such that, when in a deployed configuration, the throat-distal region of the throat-proximal portion is vertically oriented,

wherein the face attachment region is attached to the front face of the airbag and the throat coupling region is attached to the rear face of the airbag, and

wherein, in a fully inflated configuration, the longitudinal tether transitions along a longitudinal axis of the longitudinal tether from a folded configuration comprising at least one fold to a non-folded configuration between attachment points of the longitudinal tether at the front face and the rear face;

wherein said at least one fold is extending in a direction parallel to the longitudinal axis of the longitudinal tether; and

,

a lateral tether that is fixedly attached to each of the side faces and extends between the side faces,

wherein the longitudinal tether and the lateral tether are spaced from each other,

wherein the longitudinal tether and the lateral tether restrict an inflated shape of the inflatable airbag.

18. The inflatable airbag assembly of claim 17, wherein the face attachment region comprises a fold.

19. The inflatable airbag assembly of claim 17, wherein the longitudinal tether comprises two pieces of material.

20. The inflatable airbag assembly of claim 19, wherein the throat-proximal portion of the longitudinal tether comprises one of the pieces of material and the face-proximal portion of the longitudinal tether comprises the other piece of material.

21. The inflatable airbag assembly of claim 17, wherein in the deployed configuration, a cushioning portion of the front face comprises a concave conformation.

22. The inflatable airbag assembly of claim 17, wherein the rear face of the inflatable airbag comprises a throat portion, and wherein the horizontally oriented portion of the longitudinal tether is attached to the throat portion.

23. The inflatable airbag assembly of claim 17, wherein the face attachment region of the face-proximal portion is curved.

24. The inflatable airbag assembly of claim 17, wherein the face attachment region of the face-proximal portion comprises a curved portion and a linear portion.

25. The inflatable airbag assembly of claim 17, wherein the throat-proximal portion comprises first and second legs.

26. The inflatable airbag assembly of claim 17, wherein the face attachment region of the face-proximal portion has a vertical height that is greater than any dimension of the throat coupling region of the throat-proximal portion.