Inflatable tubular torso restraint system with pivoting upper anchor point attachment

• US 6,336,656 B1
• Filed: 05/25/2000
• Issued: 01/08/2002
• Est. Priority Date: 03/31/1997
• Status: Expired due to Fees

• Current Assignee: Zodiac Automotive US, Inc. (Safran SA)
• Original Assignee: Simula Inc (BAE Systems Plc)
• Inventors: Romeo, David J.
• Primary Examiner(s): Dickson, Paul N.
• Assistant Examiner(s): DRAPER, DEANN L
• Application Number:
  US09/577,659
• Time in Patent Office: 593 Days
• Field of Search: 280/808, 280/801.2, 280/802, 280/805, 280/807, 280/728.1, 280/733, 280/743.1, 297/483
• US Class Current: 280/733
• CPC Class Codes: B60R 2022/1818 Belt guides
• CPC Class Codes: B60R 21/18 the inflatable member formed as a belt or harness or combined with a belt or harness arrangement
• CPC Class Codes: B60R 22/19 with means for reducing belt tension during use under normal conditions included in the retractor B60R22/44
• CPC Class Codes: B60R 22/24 secured to the side, door, or roof of the vehicle
• CPC Class Codes: B60R 22/26 secured to the seat

Abstract

A seat restraint system whose torso belt includes an inflatable structure that inflates upon impact to protect the occupants of a vehicle such as an automobile. The torso belt is secured to an anchor arm that is pivotally mounted on a side surface of a seat of the vehicle or a side structure of the vehicle. The anchor arm is rotationally biased to remove slack in the torso belt and locks up in the event of a vehicle crash or sudden stop. The inflatable structure is linked to a gas generator and crash sensor. The gas generator may be mounted in the seat or within the anchor arm itself. When an impact above a predetermined level of severity is detected, the gas generator is ignited, inflating the inflatable structure which contracts in length as it inflates. In a preferred embodiment, the inflatable structure is a braided tube. As the braided tube inflates, the diameter of the tube increases significantly and its length decreases significantly, due to the orientation of the fibers comprising the braided tube. The contraction in length pretensions the seat belt system by pulling any additional slack out of the seat belt systems. In a frontal impact, the inflated structure restricts the forward motion of an occupant and distributes crash loads over a larger occupant surface area to reduce both primary and secondary injuries. In a side impact, the inflated structure passes over the occupant'"'"'s shoulder, restricts occupant motion, distributes crash loads and provides head and neck protection.

Claims

1. A seat restraint system for a vehicle seat in a vehicle comprising:

(a) a torso belt comprising an inflatable structure that contracts substantially in length and increases substantially in cross-sectional area when it is fully inflated, wherein the inflatable structure assumes a flat configuration prior to inflation;

(b) a gas generator fluidly connected to the inflatable structure;

(c) a crash sensor electrically connected to the gas generator, the crash sensor initiating generation of gas by the gas generator when an impact is detected such that the inflatable structure is fully inflated; and

(d) an anchor arm pivotally mounted to one of the seat and a vehicle side structure,

wherein one end of the torso belt is secured to the anchor arm and the anchor arm is rotationally biased to remove slack in the torso belt so that a full range of adult occupant sizes may be safely and comfortably accommodated.

2. The seat restrain system of claim 1, wherein the anchor arm has two legs.

3. The seat restraint system of claim 2, wherein the anchor arm is pivotally mounted to one end of one of the two legs and the torso belt is attached to the other of the one leg.

4. The seat restraint system of claim 3, wherein the anchor arm comprises a surface upon which the torso belt rests.

5. The seat restraint system of claim 3, wherein the anchor arm accommodates passengers in a size range of a 5^th percentile female to a 95^th percentile male.

6. The seat restraint system of claim 3, further comprising a hose between the inflatable structure and the gas generator, wherein the hose is fluidly connected to the gas generator on one end and fluidly connected to the inflatable structure at its other end.

7. The seat restraint system of claim 1, wherein the anchor arm is an eccentric anchor arm.

8. The seat restraint system of claim 1, wherein the inflatable structure comprises a braided tube.

9. The seat restraint system of claim 1, wherein the inflatable structure comprises an extruded net.

10. The seat restraint system of claim 1, wherein the anchor arm locks upon detection of a vehicle crash condition.

11. The seat restraint system of claim 1, wherein the anchor arm is rotatable to park and comfort reach positions.

12. The seat restraint system of claim 1, wherein the inflatable structure comprises a woven net.

13. The seat restraint system of claim 1, wherein the inflatable structure further comprises a protective sheath.

14. The seat restraint system of claim 1, further comprising a lap belt, wherein the lap belt and the torso belt form one continuous strap.

15. The seat restraint system of claim 14, wherein the continuous strap passes through a first component of a buckle assembly, further comprising a buckle strap attached to a second component of the buckle assembly, the buckle strap being pivotally mounted to the vehicle.

16. The seat restraint system of claim 1, wherein the gas generator is mounted in the anchor arm.

17. The seat restraint system of claim 1, wherein the gas generator is mounted inside the seat back.

18. A seat restraint system for a seat in a vehicle, comprising:

(a) a belt comprising a torso belt portion and a lap belt portion, the torso belt portion comprising an inflatable structure that contracts substantially in length and increases substantially in cross-sectional area when it is fully inflated, wherein the inflatable structure assumes a flat configuration prior to inflation;

(b) a gas generator fluidly connected to the inflatable structure;

(c) a crash sensor electrically connected to the gas generator, the crash sensor initiating generation of gas by the gas generator when an impact is detected such that the inflatable structure is fully inflated;

(d) an anchor arm pivotally mounted to one of the seat and a vehicle side structure;

(e) a buckle assembly, the belt passing through a first component of the buckle assembly; and

(f) a buckle strap connected to a second component of the buckle assembly, the buckle strap being pivotally attached to the vehicle,

wherein the torso belt is secured to the anchor arm and the inflatable structure is fillable via the anchor arm.

19. The seat restraint system of claim 18, wherein the anchor arm is rotationally biased to remove slack in the torso belt.

20. The seat restraint system of claim 18, wherein the inflatable structure is fluidly connected to a hose, and wherein the hose is in turn fluidly connected to the gas generator.

21. The seat restraint system of claim 18, wherein the anchor arm comprises two legs.

22. The seat restraint system of claim 21, wherein the anchor arm is an eccentric anchor arm.

23. The seat restraint system of claim 18, wherein the inflatable structure comprises a braided tube.

24. The seat restraint system of claim 18, wherein the inflatable structure comprises an extruded net.

25. The seat restraint system of claim 24, wherein the extruded net comprises intersecting fibers joined at intersections forming longitudinal angles which increase from 5°

-15°

prior to inflation, to 90°

-150°

after inflation, when the inflatable structure is fully inflated without tension.

26. The seat restraint system of claim 25, wherein the longitudinal angles increase to 90°

-110°

after inflation.

27. The seat restraint system of claim 18, wherein the inflatable structure comprises a woven net.

28. The seat restraint system of claim 18, wherein the inflatable structure is a braided tube within a protective sheath.

29. A seat restraint system, comprising:

(a) a belt having a lap belt portion, and a torso belt portion, wherein the lap belt portion is attached to an inertial reel pivotally attached to a seat or the vehicle, and wherein the belt is attached to a first portion of a buckle assembly at the end of the lap portion of the belt and at the beginning of the torso belt portion of the belt;

(b) an inflatable structure comprising part of the torso belt, the inflatable structure being secured to an anchor arm pivotally mounted to the seat or vehicle;

(c) a gas generator fluidly connected to the inflatable tubular structure; and

(d) a strap attached at one end to a second portion of the buckle assembly, and anchored to the seat or vehicle at the other end,

wherein the inflatable structure increases its cross-sectional area by at least 50% and reduces its length by at least about 20%, when it is fully inflated in an unconstrained state.

30. The seat restraint system of claim 29, wherein the anchor arm is capable of positioning the torso belt to accommodate a passenger size in the range of a 5^th percentile female to a 95^th percentile male.

31. The seat restraint system of claim 29, wherein the inflatable structure is fluidly connected to a hose.

32. The seat restraint system of claim 29, wherein the gas generator is mounted in the anchor arm.

33. The seat restraint system of claim 29, wherein the anchor comprises a first and a second leg, wherein one end of the first leg is pivotally mounted to the seat and the torso belt is secured to the other end of the first leg.

34. The seat restraint system of claim 29, wherein the inflatable structure comprises a braided tube.

35. The seat restraint system of claim 29, wherein the inflatable structure comprises an extruded net.

36. The seat restraint system of claim 35, wherein the extruded net comprises intersecting fibers joined at intersections forming longitudinal angles which increase from 5°

-15°

prior to inflation, to 90°

-150°

after inflation, when the inflatable structure is fully inflated without tension.

37. The seat restraint system of claim 36, wherein the longitudinal angles increase to 90°

-110°

after inflation.

38. The seat restraint system of claim 29, wherein the inflatable structure comprises a woven net.

39. The seat restraint system of claim 29, wherein the anchor arm includes protrusions.

40. A seat restraint system for a seat in a vehicle, comprising:

(a) a lap belt and a torso belt, the lap belt being secured on one end thereof to one of the seat and the vehicle, the torso belt comprising an inflatable tubular structure;

(b) an anchor arm pivotally mounted to one of a side surface of the seat and a vehicle side structure, wherein one end of the torso belt is secured to the anchor arm; and

(c) a gas generator fluidly connected to the inflatable tubular structure,

wherein the anchor is rotationally biased to remove slack in the torso belt and locks up in the event of a vehicle crash condition.

41. The system of claim 40, wherein the inflatable structure comprises a braided tube.

42. The system of claim 40, wherein the inflatable structure comprises an extruded net.

43. The system of claim 40, wherein the inflatable structure comprises a woven net.

44. The system of claim 40, wherein the gas generator is mounted in a seat back of the seat.

45. The system of claim 40, wherein the gas generator is mounted within the anchor arm.

46. The system of claim 40, wherein the anchor arm has force limiting properties.

47. The system of claim 40 wherein the anchor comprises two legs.

48. The system of claim 40, wherein the anchor arm is an eccentric anchor arm.

49. The system of claim 40, wherein the anchor arm is a substantially rectangular anchor arm.

50. The system of claim 40, wherein the anchor arm is rotatable to park and comfort positions.