Airbag inflator attachment with snap-in sleeve

• US 5,611,563 A
• Filed: 05/08/1996
• Issued: 03/18/1997
• Est. Priority Date: 01/05/1996
• Status: Expired due to Term

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Morton International Incorporated (Autoliv Incorporated)
• Inventors: Bunker, S. Mark, Green, David J., Saderholm, Davin G., Olson, Brent K., Storey, J. Kirk, Minert, Daniel G.
• Primary Examiner(s): Rice, Kenneth R.
• Application Number:
  US08/643,450
• Time in Patent Office: 314 Days
• Field of Search: 280/728.2, 280/732, 280/741
• US Class Current: 280/728.2
• CPC Class Codes: B60R 21/2171 specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters B60R21/2176 takes precedence

Abstract

An airbag inflator assembly including an airbag inflator and an inflator attachment having a sleeve. The inflator includes an elongated sidewall and an end having a flange stop extending outwardly from the sidewall. The sleeve receives and supports the sidewall of the inflator with the flange stop butting against the sleeve. The sleeve has an inwardly extending resilient tab that faces away from the flange stop and engages a gas exhaust port defined by the sidewall to retain the inflator within the sleeve. At least one stud extends transversely to and outwardly from the sleeve for mounting the inflator attachment and inflator within an airbag module. The inflator attachment further includes at least two spaced-apart pairs of diametrically opposed ribs protruding inwardly from the sleeve and grippingly engaging the sidewall of the inflator. The sleeve also defines gas exhaust outlets, which on different versions of the sleeve may vary to accommodate different types of inflators. According to one alternative embodiment, the inflator does not include a flange stop. Instead, the sleeve includes an endwall that butts against the inflator, with the resilient tab facing the endwall. According to another embodiment, the inflator sidewall has a tapered neck, and the resilient tab engages the tapered neck instead of the gas exhaust port. According to an additional embodiment, the sleeve does not include the resilient tab but only includes the at least two spaced-apart pairs of diametrically opposed ribs for grippingly engaging and securing the inflator within the sleeve.

Claims

1. An inflator attachment for mounting an airbag inflator including an elongated sidewall and at least one stop extending transversely outwardly with respect to the sidewall, the inflator attachment comprising:

a sleeve sized and shaped to receive and support the sidewall of the airbag inflator and butt against the stop of the airbag inflator, the sleeve having at least one inwardly projecting grip sized and adapted to allow passage of the sidewall of the airbag inflator into the sleeve and to engage the airbag inflator so that the airbag inflator, once inserted into the sleeve, is retained within the sleeve by the at least one inwardly projecting grip and a butting engagement between the sleeve and the stop of the airbag inflator; and

at least one mount extending outwardly from the sleeve for securing the inflator attachment and airbag inflator within an airbag module.

2. The inflator attachment of claim 1 for use with an airbag inflator having a sidewall defining a snap receptor and wherein:

the at least one grip comprises a resilient tab projecting inwardly from the sleeve and bendable away from the airbag inflator to allow passage of the sidewall of the airbag inflator and engageable in the snap receptor of the airbag inflator.

3. The inflator attachment of claim 2 wherein the at least one grip further includes a plurality of spaced-apart protrusions extending inwardly from the sleeve and sized to grippingly engage the sidewall of the airbag inflator.

4. The inflator attachment of claim 1 wherein the at least one grip comprises a plurality of spaced-apart protrusions extending inwardly from the sleeve and sized to grippingly engage the sidewall of the airbag inflator.

5. The inflator attachment of claim 4 wherein the plurality of spaced-apart protrusions comprises at least two spaced-apart pairs of diametrically opposed ribs.

6. The inflator attachment of claim 1 wherein the sleeve substantially surrounds the airbag inflator and defines at least one gas exhaust outlet positioned to expose at least one gas exhaust port defined by the sidewall of the airbag inflator when the airbag retainer is retained within the sleeve.

7. The inflator attachment of claim 1 wherein the mount comprises a stud extending generally transversely to and outwardly from the sleeve.

8. An inflator attachment for mounting an airbag inflator having an elongated sidewall, the inflator attachment comprising:

a sleeve sized and shaped to receive and support the sidewall of the airbag inflator and having an endwall for butting against the airbag inflator when the airbag inflator is received in the sleeve, the sleeve having at least one inwardly projecting grip sized and adapted to allow passage of the sidewall of the airbag inflator into the sleeve and to engage the airbag inflator so that the airbag inflator, once inserted into the sleeve, is retained within the sleeve by the at least one inwardly projecting grip and a butting engagement between the endwall of the sleeve and the airbag inflator; and

at least one mount extending outwardly from the sleeve for securing the inflator attachment and inflator within an airbag module.

9. The inflator attachment of claim 8 for use with an airbag inflator having a sidewall defining a snap receptor and wherein:

the at least one grip comprises a resilient tab projecting inwardly from the sleeve and bendable away from the airbag inflator to allow passage of the sidewall of the airbag inflator and engageable in the snap receptor of the airbag inflator.

10. The inflator attachment of claim 9 wherein the at least one grip further includes a plurality of spaced-apart protrusions extending inwardly from the sleeve and sized to grippingly engage the sidewall of the airbag inflator.

11. The inflator attachment of claim 8 wherein the at least one grip comprises a plurality of spaced-apart protrusions extending inwardly from the sleeve and sized to grippingly engage the sidewall of the airbag inflator.

12. The inflator attachment of claim 11 wherein the plurality of spaced-apart protrusions comprises at least two spaced-apart pairs of diametrically opposed ribs.

13. The inflator attachment of claim 8 wherein the sleeve substantially surrounds the airbag inflator and defines at least one gas exhaust outlet positioned to expose at least one gas exhaust port defined by the sidewall of the airbag inflator when the airbag retainer is retained within the sleeve.

14. The inflator attachment of claim 8 wherein the mount comprises a stud extending generally transversely to and outwardly from the sleeve.

15. An airbag inflator assembly for use in an airbag module, the airbag inflator assembly comprising:

an airbag inflator having an elongated sidewall;

an inflator attachment having a sleeve receiving and supporting the elongated sidewall of the airbag inflator;

at least one stop on one of the airbag inflator and inflator attachment providing butting engagement with the other of the airbag inflator and the inflator attachment;

at least one snap projection on one of the airbag inflator and the inflator attachment in snap engagement with at least one snap receptor on the other of the airbag inflator and the inflator attachment, wherein the butting engagement and snap engagement retain the airbag inflator in the sleeve; and

at least one mount extending from the sleeve of the inflator attachment for securing the inflator attachment and the airbag inflator within an airbag module.

16. The airbag inflator assembly of claim 15 wherein the snap receptor is formed by the airbag inflator and the snap projection is located on the inflator attachment.

17. The airbag inflator assembly of claim 16 wherein the snap projection comprises a resilient tab extending inwardly from the sleeve of the inflator attachment and the snap receptor comprises a gas exhaust port defined by the sidewall of the airbag inflator and receiving the resilient tab.

18. The airbag inflator assembly of claim 17 wherein the snap projection comprises a resilient tab extending inwardly from the sleeve of the inflator attachment and the snap receptor comprises a tapered neck defined by the sidewall of the airbag inflator and engaged by the resilient tab.

19. The airbag inflator assembly of claim 15 wherein the stop is located on the airbag inflator.

20. The airbag inflator assembly of claim 19 wherein the stop comprises a flange stop located at an end of the airbag inflator, extending outwardly from the sidewall and butting against the sleeve.

21. The airbag inflator assembly of claim 15 wherein the stop is located on the sleeve.

22. The airbag inflator assembly of claim 21 wherein the stop comprises an endwall located at an end of the sleeve of the inflator attachment and butting against the airbag inflator.

23. The airbag inflator assembly of claim 15 wherein the inflator attachment further includes a plurality of spaced-apart protrusions extending inwardly from the sleeve and grippingly engaging the sidewall of the airbag inflator.

24. The airbag inflator assembly of claim 23 wherein the plurality of spaced-apart protrusions comprises at least two spaced-apart pairs of diametrically opposed ribs protruding inwardly from the sleeve and grippingly engaging the sidewall of the airbag inflator.

25. The airbag inflator assembly of claim 15 wherein the sleeve of the inflator attachment substantially surrounds the sidewall of the airbag inflator and defines at least one gas exhaust outlet exposing at least one gas exhaust port defined by the sidewall of the airbag inflator.

26. The airbag inflator assembly of claim 15 wherein the mount comprises a stud extending generally transversely to and outwardly from the sleeve.

27. The airbag inflator assembly of claim 15 wherein the stop comprises a flange stop located at an end of the airbag inflator, extending outwardly from the sidewall and butting against the sleeve, the snap projection comprises a resilient tab extending inwardly from the sleeve and facing away from the flange stop, the snap receptor comprises a gas exhaust port defined by the sidewall of the airbag inflator, the gas exhaust port engaged by the resilient tab.

28. The airbag inflator assembly of claim 15 wherein the stop comprises an endwall located at an end of the sleeve and butting against the airbag inflator, the snap projection comprises a resilient tab extending inwardly from the sleeve and facing the endwall, the snap receptor comprises a gas exhaust port defined by the sidewall of the airbag inflator, the gas exhaust port engaged by the resilient tab.

29. An airbag inflator assembly for use in an airbag module, the airbag inflator assembly comprising:

an airbag inflator having an elongated sidewall;

an inflator attachment having a sleeve receiving and supporting the elongated sidewall of the airbag inflator;

a plurality of spaced-apart protrusions extending inwardly from the sleeve and grippingly engaging the sidewall of the airbag inflator, retaining the airbag inflator in the sleeve; and

at least one mount extending from the sleeve of the inflator attachment for securing the inflator attachment and the airbag inflator within an airbag module.

30. The airbag inflator assembly of claim 29 wherein the plurality of spaced-apart protrusions comprises at least two spaced-apart pairs of diametrically opposed ribs.

31. The airbag inflator assembly of claim 29 wherein the sleeve substantially surrounds the airbag inflator and defines at least one gas exhaust outlet exposing at least one gas exhaust port defined by the sidewall of the airbag inflator.

32. The airbag inflator assembly of claim 29 wherein the mount comprises a stud extending generally transversely to and outwardly from the sleeve.

33. The airbag inflator assembly of claim 29 wherein the sleeve of the inflator attachment has an endwall butting against the airbag inflator.