Airbag cushion exhibiting low fabric usage and simultaneously high available inflation volume

• US 6,375,219 B2
• Filed: 07/30/1999
• Issued: 04/23/2002
• Est. Priority Date: 07/30/1999
• Status: Expired due to Fees

• Current Assignee: Milliken & Company
• Original Assignee: Milliken & Company
• Inventors: Keshavaraj, Ramesh
• Primary Examiner(s): CULBRETH, ERIC D
• Application Number:
  US09/364,130
• Publication Number:
  US 20020008374A1
• Time in Patent Office: 998 Days
• Field of Search: 280/743.1, 280/728.1
• US Class Current: 280/743.1
• CPC Class Codes: B60R 2021/23509 Fabric
• CPC Class Codes: B60R 2021/23514 coated fabric
• CPC Class Codes: B60R 21/231 characterised by their shape, construction or spatial configuration

Abstract

The present invention relates to an airbag cushion which simultaneously exhibits a very low amount of fabric utilized to produce the target airbag cushion in correlation to an overall high amount of available inflation airspace within the cushion itself. These two correlative elements are now combined for the first time in what is defined as an effective fabric usage index (being the quotient of the amount of fabric utilized in the construction of the airbag cushion and the available inflation airspace volume). The inventive airbag cushion must possess an effective fabric usage factor of at most 0.0330. A cushion exhibiting such low seam usage and fabric usage factors and also comprising an integrated looped pocket for the disposition of an inflator can is also provided as well as an overall vehicle restraint system comprising the inventive airbag cushion.

Claims

1. An airbag cushion comprising at least one fabric blank, wherein:

said at least one fabric blank is symmetrical about a first line of symmetry and has a plurality of edges, said edges including;

first and second edges substantially parallel to said line of symmetry, each of said first and second edges having a respective first end and a respective second end;

a third edge, said third edge having a first end and a second end, said first end of said third edge intersecting said first end of said first edge, said third edge extending from said first edge toward said line of symmetry,

a fourth edge, said fourth edge having a first end and a second end, said first end of said fourth edge intersecting said first end of said second edge, said fourth edge extending from said second edge toward said line of symmetry, and

at least one additional edge extending between said respective second ends of said first and second edges;

said fabric blank comprises a cutout adjacent said line of symmetry and said second ends of said third and fourth edges; and

when said fabric blank is folded about said line of symmetry and said third edge is seamed to said fourth edge;

said first, second, third, and fourth edges and said at least one additional edge form a substantially oblong opening, and

said cutout forms a second opening opposite said substantially oblong opening.

2. The airbag cushion of claim 1 wherein said airbag cushion comprises a looped pocket into which an inflator canister may be disposed.

3. The airbag cushion of claim 1 further comprising a second blank forming a substantially oblong closure portion, said substantially oblong closure portion being seamed to said substantially oblong opening.

4. The airbag cushion of claim 3 wherein:

said at least one additional edge comprises fifth, sixth, seventh and eighth edges;

each of said fifth, sixth, seventh and eighth edges has a respective first and second end;

said first end of said fifth edge intersects said second end of said first edge;

said first end of said sixth edge intersects said second end of said second edge;

said first end of said seventh edge intersects said second end of said fifth edge;

said first end of said eighth edge intersects said second end of said sixth edge; and

said second end of said seventh edge intersects said second end of said eighth edge.

5. The airbag cushion of claim 4 wherein said fifth and sixth edges form opposed substantially parallel first and second sides of said substantially oblong opening.

6. The airbag cushion of claim 5 wherein said seventh and eighth edges are collinear.

7. The airbag cushion of claim 4 wherein said seventh and eighth edges from a third side of said substantially oblong opening substantially perpendicular to said first and second sides.

8. The airbag cushion of claim 7 wherein said first and second edges form a fourth side of said substantially oblong opening substantially perpendicular to said first and second sides and substantially parallel to said third side.

9. The airbag cushion of claim 7 wherein said first and second edges form a fourth side of said substantially oblong opening substantially perpendicular to said first and second sides and substantially parallel to said third side.

10. The airbag cushion of claim 1 wherein:

said at least one additional edge comprises fifth, sixth, seventh and eighth edges;

each of said fifth, sixth, seventh and eighth edges has a respective first and second end;

said first end of said fifth edge intersects said second end of said first edge;

said first end of said sixth edge intersects said second end of said second edge;

said first end of said seventh edge intersects said second end of said fifth edge;

said first end of said eighth edge intersects said second end of said sixth edge; and

said second end of said seventh edge intersects said second end of said eighth edge.

11. The airbag cushion of claim 10 wherein said fifth and sixth edges form opposed parallel first and second sides of said substantially oblong opening.

12. The airbag cushion of claim 11 wherein said third and fourth edges form a third side of said substantially oblong opening substantially perpendicular to said first and second sides.

13. The airbag cushion of claim 12 wherein said third and fourth edges are collinear.

14. The airbag cushion of claim 13 wherein said first and second edges form a fourth side of said substantially oblong opening substantially perpendicular to said first and second sides and substantially parallel to said third side.

15. The airbag cushion of claim 12 wherein said first and second edges form a fourth side of said substantially oblong opening substantially perpendicular to said first and second sides and substantially parallel to said third side.

16. An airbag cushion having at least one fabric component, wherein said airbag cushion possesses an effective fabric usage factor of less than 0.0260, said airbag cushion comprising at least one fabric blank, wherein:

said at least one fabric blank is symmetrical about a first line of symmetry and has a plurality of edges, said edges including;

first and second edges substantially parallel to said line of symmetry,

each of said first and second edges having a respective first end and a respective second end;

a third edge, said third edge having a first end and a second end, said first end of said third edge intersecting said first end of said first edge, said third edge extending from said first edge toward said line of symmetry,

a fourth edge, said fourth edge having a first end and a second end, said first end of said fourth edge intersecting said first end of said second edge, said fourth edge extending from said second edge toward said line of symmetry, and

at least one additional edge extending between said respective second ends of said first and second edges;

said fabric blank comprises a cutout adjacent said line of symmetry and said second ends of said third and fourth edges; and

when said fabric blank is folded about said line of symmetry and said third edge is seamed to said fourth edge;

said first, second, third, and fourth edges and said at least one additional edge form a substantially oblong opening, and

said cutout forms a second opening opposite said substantially oblong opening.

17. The airbag cushion of claim 16 wherein said airbag cushion comprises a looped pocket into which an inflator canister may be disposed.

18. The airbag cushion of claim 16 further comprising a second blank forming a substantially oblong closure portion, said substantially oblong closure portion being seamed to said substantially oblong opening.

19. The airbag cushion of claim 18 wherein:

said at least one additional edge comprises fifth, sixth, seventh and eighth edges;

each of said fifth, sixth, seventh and eighth edges has a respective first and second end;

said first and of said fifth edge intersects said second end of said first edge;

said first end of said sixth edge intersects said second end of said second edge;

said first end of said seventh edge intersects said second end of said fifth edge;

said first end of said eighth edge intersects said second end of said sixth edge; and

said second end of said seventh edge intersects said second end of said eighth edge.

20. The airbag cushion of claim 19 wherein said fifth and sixth edges form opposed substantially parallel first and second sides of said substantially oblong opening.

22. The airbag cushion of claim 20 wherein said seventh and eighth edges form a third side of said substantially oblong opening substantially perpendicular to said first and second sides.

23. The airbag cushion of claim 22 wherein said first and second edges from a fourth side of said substantially oblong opening substantially perpendicular to said first and second sides and substantially parallel to said third side.

24. The airbag cushion of claim 22 wherein said first and second edges form a fourth side of said substantially oblong opening substantially perpendicular to said first and second sides and substantially parallel to said third side.

25. The airbag cushion of claim 16 wherein:

said at least one additional edge comprises fifth, sixth, seventh and eighth edges;

each of said fifth, sixth, seventh and eighth edges has a respective first and second end;

said first end of said fifth edge intersects said second end of said first edge;

said first end of said sixth edge intersects said second and of said second edge;

said first end of said seventh edge intersects said second end of said fifth edge;

said first end of said eighth edge intersects said second end of said sixth edge; and

said second end of said seventh edge intersects said second end of said eighth edge.

26. The airbag cushion of claim 25 wherein said fifth and sixth edges form opposed parallel first and second sides of said substantially oblong opening.

27. The airbag cushion of claim 26 wherein said third and fourth edges form a third side of said substantially oblong opening substantially perpendicular to said first and second sides.

28. The airbag cushion of claim 27 wherein said third and fourth edges are collinear.

29. The airbag cushion of claim 28 wherein said fist and second edges form a fourth side of said substantially oblong opening substantially perpendicular to said first and second sides and substantially parallel to said third side.

30. The airbag cushion of claim 27 wherein said first and second edges form a fourth side of said substantially oblong opening substantially perpendicular to said first and second sides and substantially parallel to said third side.

31. The airbag cushion of claim 25 wherein said airbag cushion comprises a looped pocket into which an inflator canister may be disposed.

21. The airbag cushion of clam 20 wherein said seventh and eighth edges are collinear.