Actuatable locking fastener

• US 20050052000A1
• Filed: 09/04/2003
• Published: 03/10/2005
• Est. Priority Date: 09/04/2003
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Ayers, Mike, Barker, Kent
• Granted Patent: US 7,237,796 B2
• Time in Patent Office: Days
• US Class Current: 280/728.200
• CPC Class Codes: B60R 2021/2765 comprising means to control the venting
• CPC Class Codes: B60R 21/276 with means to vent the inflation fluid source, e.g. in case of overpressure B60R21/30 takes precedence; venting means on inflatable member walls B60R21/239
• CPC Class Codes: F16B 21/06 Releasable fastening devices with snap-action quickly-detachable or mountable nuts to threaded bolts F16B37/0842

Abstract

An actuatable fastener assembly is disclosed. The actuatable fastener assembly includes a fastener body and a fastener head attached to the fastener body. An initiator is embedded within the fastener body. Activation of the initiator causes the fastener head to separate from the fastener body. The actuatable fastener assembly also includes a retainer that is slidably movable along the fastener body toward the fastener head. The retainer includes a retention feature that resists movement of the retainer away from the fastener head.

Claims

1. An actuatable fastener assembly, comprising:

a fastener body;

a fastener head attached to the fastener body;

an initiator embedded within the fastener body, wherein activation of the initiator causes the fastener head to separate from the fastener body; and

a retainer that is slidably movable along the fastener body toward the fastener head, wherein the retainer comprises a retention feature that resists movement of the retainer away from the fastener head.

2. The actuatable fastener assembly of claim 1, wherein the retention feature is a first plurality of locking teeth, and wherein the first plurality of locking teeth resist movement of the retainer away from the fastener head by engaging a second plurality of locking teeth positioned on an exterior surface of the fastener body.

3. The actuatable fastener assembly of claim 1, wherein the retention feature is a locking tab that points away from the fastener head.

4. The actuatable fastener assembly of claim 3, wherein the locking tab resists movement of the retainer away from the fastener head by engaging one of a plurality of locking teeth positioned on an exterior surface of the fastener body.

5. The actuatable fastener assembly of claim 3, wherein the locking tab resists movement of the retainer away from the fastener head by frictionally engaging an exterior surface of the fastener body.

6. The actuatable fastener assembly of claim 1, wherein an exterior surface of the fastener body comprises a first plurality of locking teeth and a second plurality of locking teeth, wherein the first plurality of locking teeth are offset from the second plurality of locking teeth, and wherein the retention feature resists movement of the retainer away from the fastener head by engaging at least one of the first plurality of locking teeth and the second plurality of locking teeth.

7. The actuatable fastener assembly of claim 1, wherein the initiator comprises at least one pin, and further comprising a connector positioned within the fastener body so that terminals in the connector mate with the at least one pin.

8. The actuatable fastener assembly of claim 7, wherein the fastener body comprises a retention pocket, and wherein the connector comprises a locking tab that secures the connector to the fastener body by snapping into the retention pocket.

9. The actuatable fastener assembly of claim 1, further comprising:

a retaining ring attached to the fastener body; and

a connector attached to the retaining ring.

10. The actuatable fastener assembly of claim 9, wherein the retaining ring comprises a plurality of radially disposed splines, wherein an interior portion of the connector comprises a plurality of radially disposed ribs, and wherein the splines interact with the ribs to prevent rotation of the retaining ring relative to the connector.

11. The actuatable fastener assembly of claim 10, wherein the connector comprises a locking tab, and wherein the splines interfere with the locking tab to prevent movement of the connector away from the fastener head.

12. The actuatable fastener assembly of claim 1, further comprising a tether attached to the fastener head.

13. The actuatable fastener assembly of claim 12, wherein the tether is attachable to the retainer.

14. The actuatable fastener assembly of claim 12, wherein the fastener head, the retainer, and the tether are formed as a single unit.

15. The actuatable fastener assembly of claim 1, wherein the fastener head is directly attached to the fastener body.

16. The actuatable fastener assembly of claim 15, wherein the fastener head snaps into the fastener body.

17. The actuatable fastener assembly of claim 15, wherein the fastener head is ultrasonically welded to the fastener body.

18. The actuatable fastener assembly of claim 17, further comprising a groove extending through a welded area between the fastener head and the fastener body.

19. The actuatable fastener assembly of claim 1, wherein a coupling member attaches the fastener head to the fastener body.

20. The actuatable fastener assembly of claim 19, wherein a first connection between the fastener head and the coupling member is more easily severed than a second connection between the fastener body and the coupling member.

21. The actuatable fastener assembly of claim 1, wherein the fastener body has a length, wherein a bore extends along the length of the fastener body, and wherein the initiator is held in place by means of a press-fit between the bore and the initiator.

22. The actuatable fastener assembly of claim 1, wherein the fastener body is manufactured with the initiator in place.

23. The actuatable fastener assembly of claim 1, wherein the initiator comprises at least one initiator pin, and further comprising a shorting bar extending from the at least one initiator pin.

24. An actuatable fastener assembly for releasably securing an airbag venting tube to an airbag housing, comprising:

a fastener body extending through a venting tube hole in the airbag venting tube and a housing hole in the airbag housing;

a fastener head attached to the fastener body, wherein the fastener head is positioned so that the airbag venting tube is compressed between the fastener head and the airbag housing;

an initiator embedded within the fastener body, wherein activation of the initiator causes the fastener head to separate from the fastener body so that the airbag venting tube moves from a closed position to an open position; and

an unthreaded retainer that is positioned around the fastener body in abutting relation to the airbag housing, wherein the retainer comprises a retention feature that resists movement of the retainer away from the fastener head.

25. The actuatable fastener assembly of claim 24, wherein the retention feature is a first plurality of locking teeth, and wherein the first plurality of locking teeth resist movement of the retainer away from the fastener head by engaging a second plurality of locking teeth positioned on an exterior surface of the fastener body.

26. The actuatable fastener assembly of claim 24, wherein the retention feature is a locking tab that points away from the fastener head.

27. The actuatable fastener assembly of claim 26, wherein the locking tab resists movement of the retainer away from the fastener head by engaging one of a plurality of locking teeth positioned on an exterior surface of the fastener body.

28. The actuatable fastener assembly of claim 26, wherein the locking tab resists movement of the retainer away from the fastener head by frictionally engaging an exterior surface of the fastener body.

29. The actuatable fastener assembly of claim 24, wherein the initiator comprises at least one pin, and further comprising a connector positioned within the fastener body so that terminals in the connector mate with the at least one pin.

30. The actuatable fastener assembly of claim 24, further comprising:

a retaining ring attached to the fastener body; and

a connector attached to the retaining ring.

31. The actuatable fastener assembly of claim 24, further comprising a tether attached to the fastener head.

32. The actuatable fastener assembly of claim 31, wherein the tether is attachable to at least one of the retainer and the airbag housing.

33. The actuatable fastener assembly of claim 24, wherein the fastener head is directly attached to the fastener body.

34. The actuatable fastener assembly of claim 24, wherein a coupling member attaches the fastener head to the fastener body.

35. An actuatable fastener assembly for releasably securing an airbag venting tube to an airbag housing, comprising:

an elongated fastener body extending through a venting tube hole in the airbag venting tube and a housing hole in the airbag housing, wherein a first plurality of locking teeth are positioned on an exterior surface of the fastener body;

a fastener head attached to the fastener body, wherein the fastener head is positioned so that the airbag venting tube is compressed between the fastener head and the airbag housing;

an initiator embedded within the fastener body, wherein activation of the initiator causes the fastener head to separate from the fastener body so that the airbag venting tube moves from a closed position to an open position; and

an unthreaded retainer that is positioned around the fastener body in abutting relation to the airbag housing, wherein the retainer comprises a retention feature that resists movement of the retainer away from the fastener head by engaging the first plurality of locking teeth.

36. The actuatable fastener assembly of claim 35, wherein the retention feature is a second plurality of locking teeth.

37. The actuatable fastener assembly of claim 35, wherein the retention feature is a locking tab that points away from the fastener head.

38. An actuatable fastener assembly for releasably securing an airbag venting tube to an airbag housing, comprising:

an elongated fastener body extending through a venting tube hole in the airbag venting tube and a housing hole in the airbag housing;

a fastener head;

a coupling member that attaches the fastener head to the fastener body, wherein the fastener head is positioned so that the airbag venting tube is compressed between the fastener head and the airbag housing;

an initiator embedded within the fastener body, wherein activation of the initiator causes the fastener head to separate from the fastener body so that the airbag venting tube moves from a closed position to an open position; and

an unthreaded retainer that is positioned around the fastener body in abutting relation to the airbag housing, wherein the retainer comprises a locking tab that resists movement of the retainer away from the fastener head by engaging an exterior surface of the fastener body.

39. The actuatable fastener assembly of claim 38, wherein the locking tab resists movement of the retainer away from the fastener head by frictionally engaging the exterior surface of the fastener body.

40. The actuatable fastener assembly of claim 38, wherein the locking tab resists movement of the retainer away from the fastener head by engaging one of a plurality of locking teeth positioned on the exterior surface of the fastener body.

41. An actuatable fastener assembly, comprising:

a fastener body;

a fastener head attached to the fastener body;

means for causing the fastener head to separate from the fastener body upon receipt of an activation signal; and

a retainer that is slidably movable along the length of the fastener body toward the fastener head; and

means for restricting movement of the retainer along the length of the fastener body away from the fastener head.

42. The actuatable fastener assembly of claim 41, further comprising means for attaching a connector to the fastener body.

43. The actuatable fastener assembly of claim 41, further comprising means for attaching the fastener head to the retainer.