Method of Making an Air-Bag and an Air-Bag

• US 20080203714A1
• Filed: 01/07/2005
• Published: 08/28/2008
• Est. Priority Date: 02/10/2004
• Status: Abandoned Application

• Current Assignee: Autoliv AB (Autoliv Incorporated)
• Original Assignee: Autoliv AB (Autoliv Incorporated)
• Inventors: Dufaut, Dominique, Peron, Alexandre, Fouret, Charles, Untersinger, Pierre
• Application Number:
  US10/587,663
• Publication Number:
  US 20080203714A1
• Time in Patent Office: Days
• US Class Current: 280/741
• CPC Class Codes: B29C 49/00 Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
• CPC Class Codes: B29K 2055/02 ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• CPC Class Codes: B29K 2069/00 Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
• CPC Class Codes: B29L 2022/027 Air bags
• CPC Class Codes: B29L 2031/30 Vehicles, e.g. ships or aircraft, or body parts thereof vanes or blades B29L2031/08, air bags B29L2022/027
• CPC Class Codes: B60R 2021/23169 specially adapted for knee protection
• CPC Class Codes: B60R 2021/23176 specially adapted for foot protection
• CPC Class Codes: B60R 2021/23519 Resin for coating fabric B60R2021/23514
• CPC Class Codes: B60R 2021/23557 Molding
• CPC Class Codes: B60R 21/23138 specially adapted for side protection B60R21/23184, B60R21/232 take precedence
• CPC Class Codes: B60R 21/235 characterised by their material

Abstract

A method of making an air-bag is disclosed in which a selected plastics material is blow moulded within an appropriate mould to form a blow moulded air-bag. The mould is such that the blow moulded air-bag (1) has at least one indented region, such as a central oval region (10) of the upper part (7) of the air-bag, which, on inflation of the air-bag, becomes outwardly extending.

Claims

1. A method of making an air-bag, the method comprises the steps of blow moulding a selected plastics material to form the air-bag utilizing a mould corresponding to the final uninflated state of the air-bag, the mould being such that the moulded air-bag has at least one indented region, which, on inflation of the air-bag, becomes outwardly extending.

2. A method according to claim 1 comprising the additional step of providing a gas generator for the air-bag.

3. A method according to claim 1 wherein the indented region comprises an indented groove.

4. A method according to claim 3 wherein the groove is annular.

5. A method according to claim 3 wherein the indentation comprises a central indented area.

6. A method according to claim 1 wherein the plastic comprises at least 40% ABS and/or PC.

7. A method according to claim 6 wherein the plastic comprises at least 80% ABS and/or PC.

8. A method according to claim 1 wherein the plastic comprises ABS and/or PC.

9. An air-bag made by a method according to claim 1.

10. A method according to claim 2 wherein the indented region comprises an indented groove.

11. A method according to claim 4 wherein the indentation comprises a central indented area.