Air bag deployment bias apparatus

• US 5,560,648 A
• Filed: 08/24/1995
• Issued: 10/01/1996
• Est. Priority Date: 08/24/1995
• Status: Expired due to Term

• Current Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Original Assignee: General Motors Corporation (General Motors Company)
• Inventors: Sparkman, John P., Rhule, Daniel A.
• Primary Examiner(s): Johnson, Brian L.
• Assistant Examiner(s): English, Peter C.
• Application Number:
  US08/519,053
• Time in Patent Office: 404 Days
• Field of Search: 280/731, 280/730.1, 280/728.2, 280/728.1, 280/743.1, 280/743.2, 280/728.3, 280/732, 280/729, 280/742
• US Class Current: 280/731
• CPC Class Codes: B60R 2021/161 characterised by additional means for controlling deployment trajectory
• CPC Class Codes: B60R 21/16 Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags protective garments with automatically inflatable shock-absorbing means A41D13/018; connection of valves to inflatable elastic bodies B60C29/00
• CPC Class Codes: B60R 21/2035 using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit steering wheel covers with tear lines B60R21/21656; assembling of modules B60R21/217

Abstract

A vehicle steering wheel and air bag module assembly includes a steering wheel and an air bag module. The steering wheel has a hub portion and a rim portion and at least one spoke portion connecting the hub portion to the rim portion. The air bag module is mounted to the hub portion and includes an air bag, an inflator for generating gas to inflate the air bag, and a bias apparatus. The bias apparatus is a flexible sheet of material attached to the air bag module and having an upper portion folded atop the air bag such that when the inflation of the deploying air bag is blocked, the upper portion of the bias apparatus biases the air bag partially underneath the rim portion of the steering wheel. In addition, when the inflation of the deploying air bag is unrestrained, the bias apparatus drops downwardly away from the deploying air bag permitting the air bag to freely deploy.

Claims

1. A vehicle steering wheel and air bag module assembly comprising:

a steering wheel having a hub portion and a rim portion and at least one spoke portion connecting the hub portion to the rim portion; and

an air bag module mounted to the hub portion and including

an air bag,

an inflator for generating gas to inflate the air bag, and

a bias apparatus being a flexible sheet of material attached to the air bag module and having an upper portion folded atop the air bag such that when the inflation of the deploying air bag is blocked, the upper portion of the bias apparatus biases the air bag partially underneath the rim portion of the steering wheel.

2. The vehicle steering wheel and air bag module assembly of claim 1 wherein the bias apparatus is formed separate and independent from the air bag and is external to the air bag.

3. The vehicle steering wheel and air bag module assembly of claim 1 wherein the bias apparatus has a lower mounting portion located beneath the air bag.

4. The vehicle steering wheel and air bag module assembly of claim 1 wherein the bias apparatus has a lateral width greater than a lateral width of the rim portion of the steering wheel.

5. The vehicle steering wheel and air bag module assembly of claim 1 wherein the bias apparatus has a lateral width approximately equal to a lateral width of the air bag.

6. The vehicle steering wheel and air bag module assembly of claim 1 wherein the air bag module further includes a cover covering the air bag, inflator, and bias apparatus and wherein the bias apparatus is separate and independent from the cover.

7. The vehicle steering wheel and air bag module assembly of claim 6 wherein the bias apparatus is separate and independent from the air bag.

8. The vehicle steering wheel and air bag module assembly of claim 1 wherein the air bag deploys in a rearwardly direction and wherein the hub portion and air bag module are both offset from the rim portion in a forwardly direction.

9. The vehicle steering wheel and air bag module assembly of claim 1 wherein the steering wheel includes at least one space defined between the hub portion and the rim portion through which the air bag is biased by the bias apparatus during air bag deployment;

10. A vehicle steering wheel and air bag module assembly comprising:

a steering wheel having a hub portion and a rim portion and at least one spoke portion connecting the hub portion to the rim portion; and

an air bag module mounted to the hub portion and including

an air bag,

an inflator for generating gas to inflate the air bag, and

a bias apparatus being a flexible sheet of material attached to the air bag module and having an upper portion folded atop the air bag such that when the inflation of the deploying air bag is blocked, the upper portion of the bias apparatus is trapped between the rim portion and the air bag to bias the inflating air bag partially underneath the rim portion of the steering wheel.

11. The vehicle steering wheel and air bag module assembly of claim 10 wherein the bias apparatus is formed separate and independent from the air bag and is external to the air bag.

12. The vehicle steering wheel and air bag module assembly of claim 10 wherein the bias apparatus has a lower mounting portion located beneath the air bag.

13. The vehicle steering wheel and air bag module assembly of claim 10 wherein the bias apparatus has a lateral width greater than a lateral width of the rim portion.

14. The vehicle steering wheel and air bag module assembly of claim 10 wherein the bias apparatus has a lateral width approximately equal to a lateral width of the air bag.

15. The vehicle steering wheel and air bag module assembly of claim 10 wherein the air bag module further includes a cover covering the air bag, inflator, and bias apparatus and wherein the bias apparatus is separate and independent from the cover.

16. The vehicle steering wheel and air bag module assembly of claim 15 wherein the bias apparatus is separate and independent from the air bag.

17. The vehicle steering wheel and air bag module assembly of claim 10 wherein the air bag deploys in a rearwardly direction and wherein the hub portion and air bag module are offset from the rim portion in a forwardly direction.

18. The vehicle steering wheel and air bag module assembly of claim 10 wherein the steering wheel includes at least one space defined between the hub portion and the rim portion through which the air bag is biased by the bias apparatus during air bag deployment.

19. A vehicle steering wheel and air bag module assembly comprising:

a steering wheel having a hub portion and a rim portion and at least one spoke portion connecting the hub portion to the rim portion; and

an air bag module mounted to the hub portion and including

an air bag,

an inflator for generating gas to inflate the air bag, and

a bias apparatus being a flexible sheet of material having a lower portion attached to the air bag module and having an upper portion folded atop the air bag such that when the inflation of the deploying air bag is blocked, the upper portion of the bias apparatus is trapped between the rim portion and the air bag to bias the inflating air bag underneath the rim portion and when the inflation of the deploying air bag is unrestrained, the bias apparatus drops downwardly away from the deploying air bag permitting the air bag to freely deploy.