Inflator used as damper for steering wheel

• US 20040070185A1
• Filed: 10/11/2002
• Published: 04/15/2004
• Est. Priority Date: 10/11/2002
• Status: Active Grant

• Current Assignee: Key Safety Systems, Inc. (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Key Safety Systems, Inc. (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Xu, Xiaoping
• Granted Patent: US 6,758,489 B2
• Time in Patent Office: Days
• US Class Current: 280/731
• CPC Class Codes: B60R 21/2037 the module or a major component thereof being yieldably mounted, e.g. for actuating the horn switch or for protecting the driver in a non-deployment situation horn switches integrated in steering wheel covers with tear lines B60R21/21658
• CPC Class Codes: B62D 7/222 acting on the steering wheel
• CPC Class Codes: F16F 7/1028 the inertia-producing means being a constituent part of the system which is to be damped

Abstract

A steering wheel assembly has a steering wheel and an airbag disposed about the steering wheel. The airbag is contained within an airbag housing spaced from an airbag inflator to form a gap between the airbag inflator and the airbag housing. A shield selectively bridges the gap between the airbag inflator and the airbag housing.

Claims

1. A steering wheel assembly, comprising:

a steering wheel;

an airbag assembled with said steering wheel;

an airbag housing storing said airbag;

an airbag inflator spaced from said airbag housing to form a gap between said airbag inflator and said airbag housing; and

a shield selectively bridging said gap between said airbag inflator and said airbag housing.

2. The steering wheel assembly of claim 1 wherein said shield bridges said gap during activation of said airbag inflator.

3. The steering wheel assembly of claim 2 wherein said shield deforms to bridge said gap.

4. The steering wheel assembly of claim 3 wherein said shield comprises a ring having overlapping segments.

5. The steering wheel assembly of claim 2 wherein said airbag inflator discharges a gas for inflating said airbag that causes said shield to bridge said gap.

6. The steering wheel assembly of claim 1 wherein said shield comprises a first layer and a second layer folded over at least a portion of said first layer.

7. The steering wheel assembly of claim 1 wherein said shield seals said gap.

8. The steering wheel assembly of claim 1 wherein said shield has a first position and a second position, said first position leaving said gap open and said second position closing said gap.

9. The steering wheel assembly of claim 1 wherein said airbag inflator is supported to move relative to said steering wheel to damp vibration of said steering wheel.

10. The steering wheel assembly of claim 9 wherein said airbag inflator is resiliently connected to said steering wheel.

11. A steering wheel assembly, comprising:

a steering wheel;

an airbag assembled with said steering wheel;

an airbag housing storing said airbag;

an airbag inflator spaced from said airbag housing to form a gap between said airbag inflator and said airbag housing; and

a shield selectively bridging said gap between said airbag inflator and said airbag housing wherein said shield bridges said gap during activation of said airbag inflator, said airbag inflator discharging a gas for inflating said airbag that also causes said shield to bridge said gap.

12. The steering wheel assembly of claim 11 wherein said shield deforms to bridge said gap.

13. The steering wheel assembly of claim 12 wherein said shield comprises a ring having overlapping segments.

14. The steering wheel assembly of claim 11 wherein said shield comprises a first layer and a second layer folded over at least a portion of said first layer.

15. The steering wheel assembly of claim 11 wherein said shield seals said gap.

16. The steering wheel assembly of claim 11 wherein said shield has a first position and a second position, said first position leaving said gap open and said second position closing said gap.

17. The steering wheel assembly of claim 11 wherein said airbag inflator is supported to move relative to said steering wheel to damp vibration of said steering wheel.

18. The steering wheel assembly of claim 17 wherein said airbag inflator is resiliently connected to said steering wheel.

19. The steering wheel assembly of claim 17 wherein said airbag inflator comprises a predetermined mass based upon an anticipated vibration frequency of said steering wheel.

20. A steering wheel assembly, comprising:

a steering wheel;

an airbag assembled with said steering wheel;

an airbag housing storing said airbag; and

an airbag inflator spaced from said airbag housing forming a gap between said airbag inflator and said airbag housing.