Side airbag module

• US 5,845,935 A
• Filed: 03/07/1997
• Issued: 12/08/1998
• Est. Priority Date: 03/07/1997
• Status: Expired due to Fees

• Current Assignee: Morton International Incorporated (Autoliv Incorporated)
• Original Assignee: Morton International Incorporated (Autoliv Incorporated)
• Inventors: Enders, Mark L., Saderholm, Davin G.
• Primary Examiner(s): Rice, Kenneth R.
• Application Number:
  US08/813,648
• Time in Patent Office: 641 Days
• Field of Search: 280/730.1, 280/730.2, 280/743.2
• US Class Current: 280/743.2
• CPC Class Codes: B60R 2021/23153 specially adapted for rear seat passengers
• CPC Class Codes: B60R 2021/23161 specially adapted for protecting at least two passengers, e.g. preventing them from hitting each other
• CPC Class Codes: B60R 2021/23169 specially adapted for knee protection
• CPC Class Codes: B60R 2021/23324 Inner walls crating separate compartments, e.g. communicating with vents
• CPC Class Codes: B60R 2021/23382 Internal tether means
• CPC Class Codes: B60R 21/213 in vehicle roof frames or pillars
• CPC Class Codes: B60R 21/23138 specially adapted for side protection B60R21/23184, B60R21/232 take precedence
• CPC Class Codes: B60R 21/233 comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other B60R21/232 takes precedence
• CPC Class Codes: B60R 21/2338 Tethers
• CPC Class Codes: B60R 21/239 characterised by their venting means

Abstract

An airbag module including an inflator assembly and an airbag cushion. The inflator assembly has an inflator and at least one fastener for mounting the airbag module within a vehicle. The airbag cushion includes an inboard cushion sheet and an outboard cushion sheet having an outer periphery secured to an outer periphery of the inboard cushion sheet. The outboard cushion sheet defines an open mouth receiving the inflator assembly, and a first tether and a second tether extend between the outboard cushion sheet and the inboard cushion sheet on opposite sides of the open mouth. The first tether and the second tether divide the airbag cushion into a first airbag segment for cushioning a first seat occupant of a vehicle, a central segment containing the inflator assembly, and a second airbag segment for cushioning a second occupant of a vehicle seat occupant, and each of the first and second tethers define at least one inflation gas passage. Baffle flaps located adjacent the inflation gas passages defined by the tethers allow inflation gas to enter the first and second airbag segments from the central segment yet prevent inflation gas from exiting the first and second airbag segments through the inflation gas passages.

Claims

1. An airbag cushion for use with an airbag module including an inflator for cushioning at least two occupants of a motor vehicle, the airbag cushion comprising:

a first generally elongated cushion sheet generally centrally defining an open mouth for receiving inflation gas from the inflator, the first cushion sheet having an outer periphery;

a second generally elongated cushion sheet having an outer periphery secured to the outer periphery of the first cushion sheet; and

first and second tethers extending between the first cushion sheet and the second cushion sheet on opposite sides of and adjacent the open mouth defined by the first cushion sheet and wherein the first and second tethers divide the airbag cushion into a first airbag segment for cushioning a first occupant, a central segment comprising the open mouth for receiving inflation gas from the inflator, and a second airbag segment for cushioning a second occupant, with each of the first and second tethers defining at least one inflation gas passage therethrough.

2. An airbag cushion according to claim 1 wherein the second cushion sheet is longitudinally longer than the first cushion sheet.

3. An airbag cushion according to claim 1 further comprising:

a first baffle flap secured within the first airbag segment and located adjacent the at least one inflation gas passage defined by the first tether so that the first baffle flap allows inflation gas to enter the first airbag segment through the at least one inflation gas passage defined by the first tether yet prevents inflation gas from exiting the first airbag segment through the at least one inflation gas passage defined by the first tether; and

a second baffle flap secured within the second airbag segment and located adjacent the at least one inflation gas passage defined by the second tether so that the second baffle flap allows inflation gas to enter the second airbag segment through the at least one inflation gas passage defined by the second tether yet prevents inflation gas from exiting the second airbag segment through the at least one inflation gas passage defined by the second tether.

4. An airbag cushion according to claim 3 wherein the airbag cushion is a side airbag cushion and the first airbag segment is for cushioning a rear seat occupant and the second airbag segment is for cushioning a front seat occupant.

5. An airbag cushion according to claim 3 wherein each of said first and second baffle flaps is secured to a first end of a longitudinal tether arm in the airbag segment in which the baffle flap is located and second end of each such longitudinal tether arms is secured to an expendable portion of the airbag segment in which said longitudinal tether arm is located, so that inflation and expansion of the airbag segments causes the baffle flaps to close the at least one inflation gas passage adjacent each of said first and second baffle flaps.

6. An airbag cushion according to claim 5 wherein the second end of such longitudinal tether arm is secured between the outer peripheries of the first and second elongated cushion sheets at a location furthermost from the central segment whereby inflation of the airbag cushion causes the longitudinal tether arms to pull the respective baffle flaps to which they are secured to cause said closing of the at least one inflation gas passage adjacent each of said first and second baffle flaps.

7. An airbag cushion for use with an airbag module including an inflator for cushioning at least two occupants of a motor vehicle, the airbag cushion comprising:

a first generally elongated cushion sheet defining a generally centrally located open mouth for receiving inflation gas from the inflator, the first cushion sheet having an outer periphery;

a second generally elongated cushion sheet having an outer periphery secured to the outer periphery of the first cushion sheet;

first and second tethers, each tether extending between the first cushion sheet and the second cushion sheet on opposite sides of and adjacent the open mouth defined by the first cushion sheet, the first tether and the second tether divide the airbag cushion into a first airbag segment for cushioning a first occupant, a central segment comprising the open mouth for receiving inflation gas from the inflator, and a second airbag segment for cushioning a second occupant, each of the first and second tethers defining at least one inflation gas passage therethrough;

a first baffle flap secured within the first airbag segment and adjacent the at least one inflation gas passage defined by the first tether so that the first baffle flap allows inflation gas to enter the first airbag segment through the at least one inflation gas passage defined by the first tether yet prevents inflation gas from exiting the first airbag segment through the at least one inflation gas passage defined by the first tether; and

a second baffle flap secured within the second airbag segment and positioned adjacent the at least one inflation gas passage defined by the second tether so that the second baffle flap allows inflation gas to enter the second airbag segment through the at least one inflation gas passage defined by the second tether yet prevents inflation gas from exiting the second airbag segment through the at least one inflation gas passage defined by the second tether.

8. An airbag cushion according to claim 7 wherein the first cushion sheet is longitudinally shorter than the second cushion sheet and the shorter first cushion sheet and the first and second tethers act, upon inflation of the airbag cushion, to inhibit deployment of the inflating airbag cushion inwardly towards a vehicle interior in which the airbag module is located.

9. An airbag cushion according to claim 7 wherein the airbag cushion is a side airbag cushion and the first airbag segment is for cushioning a rear seat occupant and the second airbag segment is for cushioning a front seat occupant.

10. An airbag cushion according to claim 7 wherein each of said first and second baffle flaps is secured to a first end of a longitudinal tether arm in the airbag segment in which the baffle flap is located and second end of each such longitudinal tether arms is secured to an expendable portion of the airbag segment in which said longitudinal tether arm is located, so that inflation and expansion of the airbag segments causes the baffle flaps to close the at least one inflation gas passage adjacent each of said first and second baffle flaps.

11. An airbag cushion according to claim 10 wherein the second end of such longitudinal tether arm is secured between the outer peripheries of the first and second elongated cushion sheets at a location furthermost from the central segment whereby inflation of the airbag cushion causes the longitudinal tether arms to pull the respective baffle flaps to which they are secured to cause said closing of the at least one inflation gas passage adjacent each of said first and second baffle flaps.

12. An airbag module for cushioning at least two occupants of a motor vehicle, said airbag module comprising:

A) an inflator assembly including an inflator and at least one fastener for mounting the airbag module within a vehicle; and

B) an airbag cushion including,

a first generally elongated cushion sheet generally centrally defining an open mouth for receiving inflation gas from the inflator, the first cushion sheet having an outer periphery;

a second generally elongated cushion sheet having an outer periphery secured to the outer periphery of the first cushion sheet;

first and second tethers extending between the first cushion sheet and the second cushion sheet on opposite sides of and adjacent the open mouth defined by the first cushion sheet and wherein the first and second tethers divide the airbag cushion into a first airbag segment for cushioning a first occupant, a central segment comprising the open mouth attached to the inflator assembly for receiving inflation gas from the inflator, and a second airbag segment for cushioning a second occupant, with each of the first and second tethers defining at least one inflation gas passage therethrough.

13. A side airbag module according to claim 12 wherein the second cushion sheet is longitudinally longer than the first cushion sheet.

14. An airbag module according to claim 12 mounted in the B pillar of a vehicle.

15. An airbag module according to claim 12 wherein the airbag cushion further comprises:

a first baffle flap secured within the first airbag segment and located adjacent the at least one inflation gas passage defined by the first tether so that the first baffle flap allows inflation gas to enter the first airbag segment through the at least one inflation gas passage defined by the first tether yet prevents inflation gas from exiting the first airbag segment through the at least one inflation gas passage defined by the first tether; and

a second baffle flap secured within the second airbag and located adjacent the at least one inflation gas passage defined by the second tether so that the second baffle flap allows inflation gas to enter the second airbag segment through the at least one inflation gas passage defined by the second tether yet prevents inflation gas from exiting the second airbag segment through the at least one inflation gas passage defined by the second tether.

16. An airbag module according to claim 15 wherein the airbag cushion is a side airbag cushion and the first airbag segment is for cushioning a rear seat occupant and the second airbag segment is for cushioning a front seat occupant.

17. An airbag module according to claim 15 wherein each of said first and second baffle flaps is secured to a first end of a longitudinal tether arm in the airbag segment in which the baffle flap is located and second end of each such longitudinal tether arms is secured to an expendable portion of the airbag segment in which said longitudinal tether arm is located, so that inflation and expansion of the airbag segments causes the baffle flaps to close the at least one inflation gas passage adjacent each of said first and second baffle flaps.

18. An airbag module according to claim 17 wherein the second end of such longitudinal tether arm is secured between the outer peripheries of the first and second elongated cushion sheets at a location furthermost from the central segment whereby inflation of the airbag cushion causes the longitudinal tether arms to pull the respective baffle flaps to which they are secured to cause said closing of the at least one inflation gas passage adjacent each of said first and second baffle flaps.

19. An airbag module according to claim 16 mounted in the B pillar of a vehicle.

20. An airbag module for cushioning at least two occupants of a motor vehicle, said airbag module comprising:

A) an inflator assembly including an inflator and at least one fastener for mounting the airbag module within a vehicle; and

B) an airbag cushion including,

a first generally elongated cushion sheet defining a generally centrally located open mouth for receiving inflation gas from the inflator, the first cushion sheet having an outer periphery;

a second generally elongated cushion sheet having an outer periphery secured to the outer periphery of the first cushion sheet;

first and second tethers, each tether extending between the first cushion sheet and the second cushion sheet on opposite sides of and adjacent the open mouth defined by the first cushion sheet, the first tether and the second tether divide the airbag cushion into a first airbag segment for cushioning a first occupant, a central segment comprising the open mouth for receiving inflation gas from the inflator, and a second airbag segment for cushioning a second occupant, each of the first and second tethers defining at least one inflation gas passage therethrough;

a first baffle flap secured within the first airbag segment and adjacent the at least one inflation gas passage defined by the first tether so that the first baffle flap allows inflation gas to enter the first airbag segment through the at least one inflation gas passage defined by the first tether yet prevents inflation gas from exiting the first airbag segment through the at least one inflation gas passage defined by the first tether; and

a second baffle flap secured within the second airbag segment and positioned adjacent the at least one inflation gas passage defined by the second tether so that the second baffle flap allows inflation gas to enter the second airbag segment through the at least one inflation gas passage defined by the second tether yet prevents inflation gas from exiting the second airbag segment through the at least one inflation gas passage defined by the second tether.

21. An airbag module according to claim 20 wherein the first cushion sheet is longitudinally shorter than the second cushion sheet and the shorter first cushion sheet and the first and second tethers act, upon inflation of the airbag cushion, to inhibit deployment of the inflating airbag cushion inwardly towards the vehicle in which the airbag module is located.

22. An airbag module according to claim 20 wherein the airbag cushion is a side airbag cushion and the first airbag segment is for cushioning a rear seat occupant and the second airbag segment is for cushioning a front seat occupant.

23. An airbag module according to claim 20 wherein each of said first and second baffle flaps is secured to a first end of a longitudinal tether arm in the airbag segment in which the baffle flap is located and second end of each such longitudinal tether arms is secured to an expendable portion of the airbag segment in which said longitudinal tether arm is located, so that inflation and expansion of the airbag segments causes the baffle flaps to close the at least one inflation gas passage adjacent each of said first and second baffle flaps.

24. An airbag module according to claim 23 wherein the second end of such longitudinal tether arm is secured between the outer peripheries of the first and second elongated cushion sheets at a location furthermost from the central segment whereby inflation of the airbag cushion causes the longitudinal tether arms to pull the respective baffle flaps to which they are secured to cause said closing of the at least one inflation gas passage adjacent each of said first and second baffle flaps.

25. An airbag module according to claim 22 mounted in the B pillar of a vehicle.