Elongated inflator device and method of gas production

• US 6,755,438 B2
• Filed: 10/22/2001
• Issued: 06/29/2004
• Est. Priority Date: 10/22/2001
• Status: Expired due to Fees

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Young, Anthony M., Green, David J., Rink, Karl K.
• Primary Examiner(s): CULBRETH, ERIC D
• Application Number:
  US10/085,644
• Publication Number:
  US 20030075908A1
• Time in Patent Office: 981 Days
• Field of Search: 280/736, 280/741, 280/742, 149/109.6
• US Class Current: 280/736
• CPC Class Codes: B60R 2021/0018 Roll-over
• 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: C06D 5/00 Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets explosive compositions containing an oxidizer, fuels for rocket engines intended for reaction with an oxidant other than air C06B

Abstract

Inflation apparatuses are provided employing an elongated enclosed housing which contains a non-gaseous, fluid form of gas generant material. The housing can desirably be sufficiently flexible to permit the inflator device to be desirably shaped such as to facilitate the specific placement and location thereof within the interior of a vehicle. Also, provided are associated methods of gas production.

Claims

1. An inflator device for inflating an inflatable restraint element, the inflator device comprising:

an enclosed housing having an elongated length and opposed first and second ends;

a quantity of a gas generant material disposed within the housing, the gas generant material having a non-gaseous, fluid form and substantially extending between the first and second ends of the housing; and

an initiator device disposed adjacent the housing, upon actuation, the initiator device having a discharge portion in reaction initiating contact with at least a portion of the quantity of the gas generant material disposed within the housing;

wherein upon actuation, the initiator device initiates reaction of the gas generant material to produce inflation gas and

wherein the housing has sufficient flexibility to permit the inflator device to be shaped to a non-linear elongated axis form.

2. The inflator device of claim 1 wherein the initiator device is disposed adjacent the housing at the first end thereof.

3. The inflator device of claim 1 wherein the initiator device is disposed adjacent the housing at a point intermediate the first and second ends thereof.

4. The inflator device of claim 1 additionally comprising a sheath disposed about the exterior of the housing.

5. The inflator device of claim 1 additionally comprising an ignition device disposed within the housing and substantially extending between the first and seconds ends thereof.

6. The inflator device of claim 1 wherein the gas generant material contains a quantity of sensitizing gas.

7. The inflator device of claim 1 wherein the gas generant material is in the form of a liquid.

8. The inflator device of claim 1 wherein the gas generant material is in the form of a paste.

9. The inflator device of claim 1 wherein the housing is tubular.

10. The inflator device of claim 9 wherein the tubular housing is of circular cross section.

11. A method for inflating an inflatable restraint element, the method comprising:

initiating reaction of the gas generant material disposed within the housing of the inflator device of claim 1.

12. An inflator device for inflating an inflatable restraint element the inflator device comprising:

an enclosed housing having an elongated length and opposed first and second ends;

a quantity of a gas generant material disposed within the housing, the gas generant material having a non-gaseous, fluid form and substantially extending between the first and second ends of the housing; and

an initiator device disposed adjacent the housing, upon actuation, the initiator device having a discharge portion in reaction initiating contact with at least a portion of the quantity of the gas generant material disposed within the housing;

wherein upon actuation, the initiator device initiates reaction of the gas generant material to produce inflation gas and

wherein the gas generant material contains a quantity of sensitizing gas.

13. The inflator device of claim 12 wherein the initiator device is disposed adjacent the housing at the first end thereof.

14. The inflator device of claim 12 wherein the initiator device is disposed adjacent the housing at a point intermediate the first and second ends thereof.

15. The inflator device of claim 12 additionally comprising a sheath disposed about the exterior of the housing.

16. The inflator device of claim 12 additionally comprising an ignition device disposed within the housing and substantially extending between the first and seconds ends thereof.

17. The inflator device of claim 12 wherein the sensitizing gas is selected from the group consisting of oxygen, nitrous oxide, carbon dioxide and mixtures thereof.

18. A method for inflating an inflatable restraint element, the method comprising:

initiating reaction of the gas generant material disposed within the housing of the inflator device of claim 17.

19. The inflator device of claim 12 wherein the sensitizing gas comprises nitrous oxide.

20. The inflator device of claim 12 wherein the sensitizing gas comprises carbon dioxide.

21. The inflator device of claim 12 wherein the sensitizing gas comprises a combustible mixture.

22. The inflator device of claim 12 wherein the gas generant material is in the form of a liquid.

23. The inflator device of claim 12 wherein the gas generant material is in the form of a paste.

24. The inflator device of claim 12 wherein the housing is tubular.

25. The inflator device of claim 24 wherein the tubular housing is of circular cross section.

26. A method for inflating an inflatable restraint element, the method comprising:

initiating reaction of the gas generant material disposed within the housing of the inflator device of claim 12.

27. An inflator device for inflating an inflatable restraint element, the inflator device comprising:

a tubular housing having an elongated length and opposed first and second ends;

a quantity of a gas generant material disposed within the tubular housing, the gas generant material having a non-gaseous, fluid form and substantially extending between the first and second ends of the tubular housing, the gas generant material containing a quantity of sensitizing gas selected from the group consisting of oxygen, nitrous oxide, carbon dioxide and mixtures thereof;

an initiator device disposed adjacent the tubular housing, upon actuation, the initiator device having a discharge portion in reaction initiating contact with at least a portion of the quantity of the gas generant material disposed within the tubular housing; and

a sheath covering disposed about the exterior of the tubular housing;

wherein upon actuation, the initiator device initiates reaction of the gas generant material to produce inflation gas resulting in opening of the tubular housing and release of at least a portion of the inflation gas therefrom and wherein the sheath covering is effective to retain therewithin fragmentary portions of the tubular housing formed upon the opening thereof.

28. A method for inflating an inflatable restraint element, the method comprising:

initiating reaction of the gas generant material disposed within the housing of the inflator device of claim 27.

29. The inflator device of claim 27 wherein the initiator device is disposed adjacent the housing at the first end thereof.

30. A method for inflating an inflatable restraint element, the method comprising:

initiating reaction of the gas generant material disposed within the housing of the inflator device of claim 29.

31. The inflator device of claim 27 wherein the initiator device is disposed adjacent the housing at a point intermediate the first and second ends thereof.

32. A method for inflating an inflatable restraint element, the method comprising:

initiating reaction of the gas generant material disposed within the housing of the inflator device of claim 31.

33. The inflator device of claim 27 wherein the tubular housing has sufficient flexibility to permit the inflator device to be shaped to a non-linear elongated axis form.