Inflator with weld spatter collection

• US 20050230948A1
• Filed: 04/20/2004
• Published: 10/20/2005
• Est. Priority Date: 04/20/2004
• Status: Abandoned Application

• Current Assignee: TRW Vehicle Safety Systems Incorporated (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: TRW Vehicle Safety Systems Incorporated (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Green, Lloyd G., Gremplewski, Waldemar K., Cook, Fred J., Mramor, Vincent J., Al-Amin, Ahmad K.
• Application Number:
  US10/827,870
• Publication Number:
  US 20050230948A1
• Time in Patent Office: Days
• US Class Current: 280/736
• CPC Class Codes: B60R 2021/26011 using a filter through which the inflation gas passes
• CPC Class Codes: B60R 21/272 with means for increasing the pressure of the gas just before or during liberation, e.g. hybrid inflators

Abstract

An apparatus (10) for helping to protect an occupant of a vehicle (12) includes an inflatable vehicle occupant protection device (14). An inflator (24) provides inflation fluid for inflating the protection device (14). A conduit (360) delivers the inflation fluid from the inflator (24) to the protection device (14). The inflator (24) includes an outlet passage (302) and a conduit receiving portion (300) for receiving an end portion (364) of the conduit (360). The conduit receiving portion (300) includes a wall portion (320, 330) that encircles the outlet passage (302) and is spaced from the end portion (364) of the conduit (360) to help define an annular space (372, 374) between the wall portion and the end portion.

Claims

1. An apparatus for helping to protect an occupant of a vehicle, said apparatus comprising:

an inflatable vehicle occupant protection device;

an inflator for providing inflation fluid for inflating said inflatable vehicle occupant protection device; and

a conduit for delivering the inflation fluid from said inflator to said inflatable vehicle occupant protection device;

said inflator comprising an outlet passage and a conduit receiving portion for receiving an end portion of said conduit, said conduit receiving portion including a wall portion that encircles said outlet passage and is spaced from said end portion of said conduit to help define a annular space between said wall portion and said end portion.

2. The apparatus recited in claim 1, wherein said conduit receiving portion further comprises an end wall that extends from said wall portion toward said conduit, said end wall helping to define said annular space.

3. The apparatus recited in claim 2, further comprising a weld connecting said end portion of said conduit to said end wall of said conduit receiving portion.

4. The apparatus recited in claim 3, wherein said annular space serves as a receptacle for collecting weld spatter generated during the formation of said weld.

5. The apparatus recited in claim 2, wherein said end wall of said conduit receiving portion extends at an acute angle relative to an axis of said conduit receiving portion.

6. The apparatus recited in claim 5, wherein said end portion of said conduit has a rounded terminal end that cooperates with said end wall of said conduit receiving portion to align said end portion of said conduit coaxially with said conduit receiving portion.

7. The apparatus recited in claim 1, wherein said wall portion and said end portion of said conduit are arranged coaxially with each other.

8. The apparatus recited in claim 1, wherein said wall portion of said conduit receiving portion comprises an outer side wall, said end portion of said conduit being extendable into a space bounded by said outer side wall, an inner surface of said outer side wall and an outer surface of said conduit being spaced apart from each other to help define said annular space between said conduit and said outer side wall.

9. The apparatus recited in claim 8, wherein said conduit receiving portion further comprises an inner sleeve extendable into said end portion of said conduit when said conduit is received in said conduit receiving portion, a second annular space being defined between an outer surface of said inner sleeve and an inner surface of said end portion of said conduit.

10. The apparatus recited in claim 9, wherein said inner sleeve has an inner surface that merges with a surface defining said outlet passage of said inflator.

11. The apparatus recited in claim 10, wherein said conduit receiving portion further comprises an end wall that extends from said inner surface of said outer side wall to said outer surface of said inner sleeve, said inner sleeve, said outer side wall and said end wall defining said conduit receiving portion.

12. The apparatus recited in claim 11, wherein said conduit when received in said conduit receiving portion divides said conduit receiving portion annular space into said annular space and said second annular space.

13. The apparatus recited in claim 1, wherein said wall portion comprises an inner sleeve extendable into said end portion of said conduit when said conduit is received in said conduit receiving portion, said annular space being defined between an outer surface of said inner sleeve and an inner surface of said end portion of said conduit.

14. The apparatus recited in claim 13, wherein said conduit receiving portion further comprises an outer side wall, said end portion of said conduit being extendable into a space bounded by said outer side wall, a second annular space being defined between an outer surface of said end portion of said conduit and an inner surface outer side wall.

15. The apparatus recited in claim 14, wherein said conduit receiving portion further comprises an end wall that extends from said inner surface of said outer side wall toward said outer surface of said inner sleeve, said inner sleeve, said outer side wall and said end wall defining said conduit receiving portion.

16. The apparatus recited in claim 15, wherein said conduit when received in said conduit receiving portion divides said conduit receiving portion annular space into said annular space and said second annular space.

17. The apparatus recited in claim 1, wherein said inflator further comprises:

a structure defining a chamber for storing inflation fluid under pressure;

a closure member rupturable to release said inflation fluid from said chamber into said outlet passage; and

an initiator actuatable to rupture said closure member.

18. The apparatus recited in claim 17, wherein said structure defining said chamber comprises a generally cylindrical container and end cap centered on a longitudinal axis of said inflator, said end cap comprising said conduit receiving portion.

19. The apparatus recited in claim 1, wherein said inflatable vehicle occupant protection device comprises an inflatable curtain inflatable between a side structure of the vehicle and a vehicle occupant.

20. The apparatus recited in claim 1, wherein said conduit comprises a connector sleeve connectable with a conduit for delivering said inflation fluid to the inflatable vehicle occupant protection device.

21. The apparatus recited in claim 1, wherein said conduit comprises a conduit for delivering said inflation fluid to the inflatable vehicle occupant protection device.

22. An apparatus for providing inflation fluid to an inflatable vehicle occupant protection device, said apparatus comprising:

an inflator actuatable to provide inflation fluid for inflating the inflatable vehicle occupant protection device, said inflator including an outlet passage for discharging inflation fluid from said inflator;

a conduit having an end portion welded to said inflator, said end portion encircling said outlet passage;

an inner channel formed inside said conduit adjacent said end portion of said conduit, said inner channel encircling said outlet passage.

23. The apparatus recited in claim 22, wherein said inner channel comprises:

an inner side wall encircling said outlet passage;

an outer side wall encircling said outlet passage and spaced from said inner side wall; and

an end wall extending from said inner side wall to said outer side wall.

24. The apparatus recited in claim 22, further comprising an outer channel formed outside said conduit adjacent said end portion of said conduit, said outer channel encircling said outlet passage.

25. The apparatus recited in claim 24, wherein said outer channel comprises:

an inner side wall extending about a periphery of said conduit;

an outer side wall encircling said end portion of said conduit; and

an end wall extending from said inner side wall to said outer side wall.

26. An apparatus for providing inflation fluid to an inflatable vehicle occupant protection device, said apparatus comprising:

an inflator actuatable to provide inflation fluid for inflating the inflatable vehicle occupant protection device, said inflator including an outlet passage for discharging inflation fluid from said inflator;

a conduit having an end portion welded to said inflator, said end portion encircling said outlet passage;

an outer channel formed outside said conduit adjacent said end portion of said conduit, said outer channel encircling said outlet passage.

27. The apparatus recited in claim 26, wherein said outer channel comprises:

an inner side wall extending about a periphery of said conduit;

an outer side wall encircling said end portion of said conduit; and

an end wall extending from said inner side wall to said outer side wall.

28. The apparatus recited in claim 26, further comprising an inner channel formed inside said conduit adjacent said end portion of said conduit, said inner channel encircling said outlet passage.

29. The apparatus recited in claim 28, wherein said inner channel comprises:

an inner side wall encircling said outlet passage;

an outer side wall encircling said outlet passage and spaced from said inner side wall; and

an end wall extending from said inner side wall to said outer side wall.

30. An apparatus comprising:

an inflator actuatable to provide inflation fluid for inflating an inflatable vehicle occupant protection device;

a conduit for delivering inflation fluid to the inflatable vehicle occupant protection device;

a weld for securing said conduit to said inflator; and

means for collecting weld spatter generated during the formation of said weld.

31. The apparatus recited in claim 30, wherein said means for collecting weld spatter comprises an inner annular channel for collecting weld spatter inside said conduit.

32. The apparatus recited in claim 30, wherein said means for collecting weld spatter comprises an outer annular channel for collecting weld spatter outside said conduit.

33. The apparatus recited in claim 30, wherein said means for collecting comprises an annular channel for receiving a terminal end portion of said conduit, said terminal end portion dividing said annular channel into an inner annular channel for collecting weld spatter inside said conduit and an outer annular channel for collecting weld spatter outside said conduit.

34. An inflator for providing inflation fluid to an inflatable vehicle occupant protection device via a conduit, said inflator comprising:

a structure defining a chamber for storing inflation fluid under pressure;

a closure member rupturable to release said inflation fluid from said chamber; and

an end cap connectable with said structure, said end cap being connectable with the conduit via a weld, said end cap including an annular channel located inside the conduit for collecting weld spatter resulting from the weld.

35. An inflator for providing inflation fluid to an inflatable vehicle occupant protection device via a conduit, said inflator comprising:

a structure defining a chamber for storing inflation fluid under pressure;

a closure member rupturable to release said inflation fluid from said chamber; and

an end cap connectable with said structure, said end cap being connectable with the conduit via a weld, said end cap including an annular channel located outside the conduit for collecting weld spatter resulting from the weld.