Modular airbag inflator system

• US 20020180193A1
• Filed: 06/01/2001
• Published: 12/05/2002
• Est. Priority Date: 06/01/2001
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Smith, Bradley W.
• Granted Patent: US 6,595,546 B2
• Time in Patent Office: Days
• US Class Current: 280/736
• CPC Class Codes: B60R 2021/0018 Roll-over
• CPC Class Codes: B60R 2021/23107 the bag being integrated in a multi-bag system
• CPC Class Codes: B60R 2021/26058 using a combination of inflators
• CPC Class Codes: B60R 2021/2617 Curtain bag nozzles
• CPC Class Codes: B60R 2021/2648 comprising a plurality of combustion chambers or sub-chambers
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/264 using instantaneous generation of gas, e.g. pyrotechnic B60R21/268 takes precedence
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder
• CPC Class Codes: B60R 21/268 using instantaneous release of stored pressurised gas B60R21/26005 takes precedence

Abstract

A modular inflator system is disclosed that allows standardized inflator sections to be connected to assemble an airbag inflator. The modular inflator also allows the inflator to bend to follow the contour of a vehicle roof. The system includes one or more inflator sections, and a connector. The connector may be flexible to allow the modular inflator to be installed along a curve vehicle roof rail.

Claims

1. A modular airbag inflation system, comprising:

a first inflator section;

a second inflator section connected at one end by a flexible hose to an end of the first inflator section;

wherein a heated gas traveling through the first inflator section is capable of passing through the hose to ignite gas generant within the second inflator section.

2. A modular airbag inflation system as in claim 1, wherein the first inflator section comprises an initiator secured within an unconnected end.

3. A modular airbag inflation system as in claim 1, wherein the second inflator section comprises a stop secured within an unconnected end.

4. A modular airbag inflation system as in claim 1, wherein the first inflator section and second inflator section are substantially cylindrical.

5. A modular airbag inflation system as in claim 1, wherein a plurality of inflator sections are connected in series with a flexible hose connecting each inflator section to the next inflator section in the series.

6. A modular airbag inflation system as in claim 1, wherein ends of the first inflator section and second inflator section that connect to the flexible hose comprise a plurality of barbs.

7. A modular airbag inflation system, comprising:

at least two inflator sections;

at least one flexible hose capable of securing an inflator section to an end of the hose;

wherein the inflator sections are secured to each other by the hose.

8. A modular airbag inflation system as in claim 7, wherein each end of the hose is secured to an inflator section by a connector.

9. A modular airbag inflation system as in claim 7, wherein one inflator section comprises an initiator.

10. A modular airbag inflation system as in claim 7, wherein the inflator sections are substantially cylindrical.

11. A modular airbag inflation system as in claim 7, wherein a gas generant is disposed within the inflator sections.

12. A modular airbag inflation system as in claim 7, wherein one inflator section comprises an ignition enhancer.

13. A modular airbag inflation system as in claim 7, wherein the inflator sections are connected in a series with one hose and two connectors connecting each inflator section to the next inflator section.

14. A modular airbag inflation system as in claim 13, wherein the inflator sections, flexible hoses, and connectors further comprise an internal gas passage way to allow a heated gas to travel from a first inflator section, through each hose and connector and such that gas generant is ignited within each trailing inflator section until a last inflator section is ignited.

15. A modular airbag inflation system as in claim 14, wherein the last inflator section is attached to a supplemental inflator.

16. A modular airbag inflation system as in claim 7, wherein each connector comprises a barb connector.

17. A modular airbag inflation system as in claim 7, wherein each connector comprises a rigid tube configured with a hose clamp which secures the hose to the rigid tube.

19. An airbag inflator section connection assembly as in claim 18, wherein the connectors comprise a plurality of barbs disposed on one end, the plurality of barbs being configured to allow easy insertion of a connector within the hose and resist removal of a connector from the hose.

20. An airbag inflator section connection assembly as in claim 18, wherein the connectors comprise a neck configured with a groove to allow a casing of an inflator section surrounding the neck to engage the groove when crimped.

21. An airbag inflator section connection assembly as in claim 18, further comprising ignition enhancer disposed within the hose to assist a heated gas in traveling from one end of the hose to the other.

22. An airbag inflator section connection assembly as in claim 18, wherein the hose is made of rubber.

23. An airbag inflator section connection assembly as in claim 18, wherein the hose is cylindrical in shape.

25. A curtain airbag inflator system as in claim 24, wherein the first inflator section comprises an initiator secured within an unconnected end.

26. A curtain airbag inflator system as in claim 24, wherein the second inflator section comprises a stop secured within an unconnected end.

27. A curtain airbag inflator system as in claim 24, wherein the first inflator section and second inflator section are substantially cylindrical.

29. A method as in claim 28, wherein the first inflator section and second inflator section are cylindrical.

18. An airbag inflator section connection assembly, comprising:

a flexible hose;

two connectors, each connector being secured within an end of the hose; and

wherein the connectors are configured to receive and secure an end of an airbag inflator section.

24. A curtain airbag inflator system comprising:

a flexible hose;

a first connector secured at one end of the hose and a second connector secured at the other end of the hose;

a first inflator section secured at one end to the first connector and a second inflator section secured at one end to the second connector;

wherein a heated gas traveling through the first inflator section is capable of passing through the first connector, the hose, and through the second connector to ignite gas generant within the second inflator section.

28. A method for manufacturing a modular curtain airbag inflator system, comprising:

providing a first inflator section having a length chosen from a set of at least two different lengths and a proximal end having an initiator disposed therein;

crimping a distal end of the first inflator section to a neck of a first connector;

inserting a barbed end of the first connector within an end of a flexible tube;

inserting a barbed end of a second connector within the other end of the flexible tube; and

crimping a proximal end of a second inflator section to the neck of the second connector, the second inflator having a length chosen from the set of at least two different lengths and configured with a stop closing a distal end of the second inflator section.