AIRBAG FOR MOTOR VEHICLES AND METHOD FOR MANUFACTURING AN AIRBAG

• US 20120267880A1
• Filed: 12/13/2010
• Published: 10/25/2012
• Est. Priority Date: 12/18/2009
• Status: Abandoned Application

• Current Assignee: Autoliv AB (Autoliv Incorporated)
• Original Assignee: Autoliv AB (Autoliv Incorporated)
• Inventors: Jacobsson, Börje, Henriksson, Ola, Svensson, Carl-Johan, Berntsson, Mats, Kjell, Fredrik, Andersson, Stefan, Frisk, Henrik
• Application Number:
  US13/516,283
• Publication Number:
  US 20120267880A1
• Time in Patent Office: Days
• US Class Current: 280/730.2
• CPC Class Codes: B60R 2021/2375 Folding devices
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/237 characterised by the way they are folded

Abstract

An airbag for a motor vehicle includes an airbag skin having two side walls which enclose a gas chamber. The airbag skin is at least partially rolled to a shaped package in the resting state of the curtain airbag, with the shaped package having a non-circular cross-section. In order to provide a cost-effective way to produce such an airbag and to ensure that the airbag shows a deployment behaviour of a rolled package, the non-circular cross-section is permanent as long as the pressure inside the gas chamber does not exceed the pressure of the environment and is obtainable by plastic conversion of a rolled package with a circular cross-section.

Claims

1-16. -16. (canceled)

17. An airbag for a motor vehicle comprising:

an airbag skin having two side walls which enclose a gas chamber, the airbag skin being at least partially rolled to a shaped package in the resting state of the airbag, with the shaped package having a non-circular cross-section, the non-circular cross-section permanent as long as a pressure inside the gas chamber does not exceed the pressure of the environment and is obtainable by plastic conversion of a rolled package with a circular cross-section.

18. The airbag according to claim 17, wherein the direction of curvature of the side walls in the shaped package is monotonous.

19. The airbag according to claim 17, wherein the shaped package has a longer side and a shorter side.

20. The airbag according to claim 19, wherein the longer side is at least 1.5 times as long as the shorter side.

21. The airbag according to claim 19, wherein the shaped package has an oval cross section.

22. The airbag according to claim 17, wherein an edge of the airbag extends along the longer side.

23. The airbag according to claim 17, wherein the mounting elements extend from an edge of the airbag skin.

24. The airbag according to claim 23, wherein the mounting elements comprise at least one stiff mounting element.

25. The airbag according to claim 17, wherein the airbag skin is made of plastic fabric.

26. The airbag according to claim 17, wherein the airbag skin is coated.

27. The airbag according to claim 26, wherein the coating is made of thermoplastic components.

28. The airbag according to claim 17, wherein the airbag is a curtain airbag.

29. A method for manufacturing the airbag of claim 17 comprising:

rolling the airbag skin to a rolled package with a circular cross-section; and

converting the rolled package to the shaped package by pressing onto the package with plates from at least two sides.

30. The method according to claim 29, wherein the pressing is performed with at least 5000 N per meter package.

31. The method according to claim 29, further comprising applying additional heat to the package during pressing.

32. The method according to claim 31, wherein at least one plate is heated to more than 80°

C.