Airbag vent

• US 7,740,274 B2
• Filed: 04/04/2007
• Issued: 06/22/2010
• Est. Priority Date: 04/05/2006
• Status: Expired due to Fees

• Current Assignee: Zodiac Automotive US, Inc. (Safran SA)
• Original Assignee: Zodiac Automotive US, Inc. (Safran SA)
• Inventors: Manssart, Xavier
• Primary Examiner(s): Dickson; Paul N
• Assistant Examiner(s): BECK, KAREN JANE AMORES
• Application Number:
  US11/732,550
• Publication Number:
  US 20070246922A1
• Time in Patent Office: 1,175 Days
• Field of Search: 280/739, 280/736, 280/742
• US Class Current: 280/739
• CPC Class Codes: B60R 2021/2395 comprising means to control the venting
• CPC Class Codes: B60R 21/239 characterised by their venting means

Abstract

Certain aspects and embodiments of the present invention provide an airbag having a vent that can adaptively release gas from the airbag upon impact with an occupant. The vent may include a membrane and/or diaphragm that can control the amount of gas released from the airbag based on the pressure in the airbag. During a collision, the airbag can be filled with gas and absorb the energy from an occupant causing the pressure in the airbag to increase. The adaptive vent can release gas from the airbag by opening when the occupant impacts the airbag. In some embodiments, the size of the vents changes depending on the pressure existing in the airbag.

Claims

1. An airbag vent comprising:

a membrane covering an opening in an airbag, the membrane is configured to prevent gas from substantially exiting the airbag before an occupant impacts the airbag;

a membrane support member connecting the membrane to the airbag, wherein the membrane support member is adapted to elongate as a pressure in the airbag increases, the membrane support member being configured to elongate an amount based in part on a shape of the membrane support member and the pressure in the airbag; and

a diaphragm connected to the airbag fabric by a support member, wherein the support member is adapted to elongate as the pressure in the airbag increases and is adapted to cause the diaphragm to contract to allow gas to be released from the airbag,

wherein the membrane is adapted to move to an open position when the membrane support member elongates as the pressure in the airbag increases to allow gas to be released from the airbag,

wherein the membrane at the open position is configured to remain connected to the membrane support member.

2. The airbag vent of claim 1, wherein the membrane and membrane support member are silicone.

3. The airbag vent of claim 1, wherein the membrane allows more gas to be released as the pressure in the airbag increases.

4. The airbag vent of claim 1, wherein the membrane support member is glued to the airbag.

5. The airbag vent of claim 1, wherein the airbag vent comprises a plurality of membrane support members.

6. The airbag vent of claim 1, wherein the amount of gas released is based on at least one of:

a number of membrane support members;

the shape of the membrane support member;

a thickness of the membrane support member; and

a modulus of the membrane support member.

7. The airbag vent of claim 1, wherein the diaphragm and support member are silicone.

8. The airbag vent of claim 1, wherein the support member is the membrane support member.

9. The airbag vent of claim 1, wherein elongation of the membrane support member adapts a size or a shape of the opening based on the pressure in the airbag,

wherein the amount of gas released through the opening is based on the size or the shape of the opening.

10. The airbag vent of claim 1, wherein the membrane is coupled to the membrane support member with glue.

11. An airbag vent comprising:

a diaphragm;

a membrane covering an opening;

a support member connecting the diaphragm and the membrane to an airbag, wherein the support member is adapted to elongate as a pressure in the airbag increases and cause the diaphragm to contract, the diaphragm being configured to cause more gas to be released as the pressure in the airbag increases, the support member being configured to elongate an amount based in part on a shape of the support member and the pressure in the airbag; and

wherein the diaphragm contraction allows the membrane to move to an open position to release gas from the airbag through the opening, the amount of gas released being based on the pressure in the airbag,

wherein the membrane at the open position is configured to remain connected to the support member.

12. The airbag vent of claim 11, wherein the diaphragm and support member are silicone.

13. The airbag vent of claim 11, wherein the support member is glued to the airbag.

14. The airbag vent of claim 11, wherein the adaptive vent comprises a plurality of support members.

15. The airbag vent of claim 11, wherein the amount of gas released is based on at least one of:

a number of support members;

the shape of the support member;

a thickness of the support member; and

a modulus of the support member.

16. The airbag vent of claim 11, wherein the membrane and the support member are silicone.

17. The airbag vent of claim 11, wherein the support member is a membrane support member.

18. The airbag vent of claim 11, wherein diaphragm contraction adapts a size or a shape of the opening based on the pressure in the airbag,

wherein the amount of gas released through the opening is based on the size or the shape of the opening.

19. An airbag comprising:

an airbag fabric;

an opening associated with an airbag vent, the vent comprising;

a membrane adapted to cover the opening and prevent gas from substantially exiting the airbag before an occupant impacts the airbag; and

a membrane support member connecting the membrane to the airbag fabric, wherein the membrane support member is adapted to elongate as a pressure in the airbag increases, the membrane support member being configured to elongate an amount based in part on a shape of the membrane support member and the pressure in the airbag; and

a diaphragm connected to the airbag fabric by a support member, wherein the support member is adapted to elongate as the pressure in the airbag increases and is adapted to cause the diaphragm to contract to allow gas to be released from the airbag,

wherein the membrane is adapted to move to an open position when the membrane support member elongates to release gas from the airbag, the amount of gas released being based on the pressure in the airbag,

wherein the membrane at the open position is configured to remain connected to the membrane support member.

20. The airbag of claim 19, wherein the membrane and membrane support member are silicone.

21. The airbag of claim 19, wherein the membrane allows more gas to be released as the pressure in the airbag increases.

22. The airbag of claim 19, wherein the vent comprises a plurality of membrane support members.

23. The airbag of claim 19, wherein the amount of gas released is based on at least one of:

a number of membrane support members;

the shape of the membrane support member;

a thickness of the membrane support member; and

a modulus of the membrane support member.

24. The airbag of claim 19, wherein the diaphragm and support member are silicone.

25. The airbag of claim 19, wherein the support member is the membrane support member.