Airbag module for selectively venting airbag inflation gas

• US 7,055,856 B2
• Filed: 02/06/2003
• Issued: 06/06/2006
• Est. Priority Date: 02/06/2003
• Status: Expired due to Term

• 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: Ford, Brian, Sawall, Rolf, Jerrim, Joel
• Primary Examiner(s): Fleming, Faye M.
• Application Number:
  US10/359,256
• Publication Number:
  US 20040155442A1
• Time in Patent Office: 1,216 Days
• Field of Search: 280/739, 280/740, 280/741, 280/742, 280/736, 280/738
• US Class Current: 280/736
• CPC Class Codes: B60R 2021/2765 comprising means to control the venting
• CPC Class Codes: B60R 21/2171 specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters B60R21/2176 takes precedence
• CPC Class Codes: B60R 21/276 with means to vent the inflation fluid source, e.g. in case of overpressure B60R21/30 takes precedence; venting means on inflatable member walls B60R21/239
• CPC Class Codes: B60R 21/30 with means to draw ambient air into the flow line and mix such air with the inflation fluid

Abstract

An airbag module comprises an airbag inflatable through an opening and an airbag inflator in communication with the opening. A block selectively diverts inflation gas away from the airbag opening. The block may move from a first position and a second position, the first position permitting the inflation gas to flow to the opening and the second position deflecting the inflation gas away from the opening.

Claims

1. An airbag module comprising:

an airbag inflatable through an opening;

an airbag inflator for communicating an inflation gas into said opening;

a flap in communication with said airbag inflator for selectively directing the inflation gas away from said opening, said flap having a hinge and being movable between a first position and a second position, said first position permitting the inflation gas to flow freely to said opening and in said second position said flap is interposed between the inflator and said opening such that the flap deflects inflation gas away from said opening;

an actuator selectively moving said flap between said first position and said second position;

a control unit controlling said actuator; and

a sensor in communication with said control unit.

2. The airbag module of claim 1 wherein said flap comprises a gas flow diverter.

3. The airbag module of claim 1 wherein said actuator comprises a pyrotechnic device.

4. The airbag module of claim 1 wherein said airbag inflator assists in moving said flap between said first position and said second position.

5. The airbag module of claim 1 wherein said hinge resists movement of said flap.

6. The airbag module of claim 1 wherein said hinge comprises a deformable material.

7. The airbag module of claim 1 wherein said flap comprises a first portion and a second portion, said hinge holding said first portion to said second portion.

8. The airbag module of claim 1 wherein said flap does not separate into two or more pieces during actuation.

9. The airbag module of claim 1 including another opening for said airbag and another flap in communication with said airbag inflator for selectively directing the inflation gas away from said another opening.

10. The airbag module of claim 1 wherein said flap directs the inflation gas outside of said airbag.

11. An airbag module comprising:

an airbag inflatable through an opening;

an airbag inflator selectively in communication with a first passage and a second passage, said first passage directed toward said opening and said second passage directed away from said opening;

a gas flow diverter in communication with said airbag inflator, having a first position and a second position, said first position placing the gas flow diverter between the inflator and said first passage and said second position placing the gas flow diverter between the inflator said second passage;

an actuator comprising a pyrotechnic device for moving said gas flow diverter between said first position and said second position, said first position permitting the inflation gas to flow to said opening and in said second position said gas flow diverter deflects inflation gas away from said opening, said gas flow diverter comprising a flap having a hinge;

a sensor; and

a control unit in communication with said sensor, controlling said actuator.

12. The airbag module of claim 11 including a piston in communication with said pyrotechnic device.

13. An airbag module, comprising:

an airbag inflatable through a first opening a second opening;

an airbag inflator for communicating an inflation gas into said first opening and said second opening;

a first block in communication with said airbag inflator for selectively directing the inflation gas away from said first opening; and

a second block in communication with said airbag inflator for selectively directing the inflation gas away from said second opening.

14. The airbag module of claim 13 wherein said first opening is a different size from said second opening.

15. The airbag module of claim 14 wherein said first opening is smaller than said second opening.

16. The airbag module of claim 13 including a first actuator selectively moving said first block and a second actuator selectively moving said second block.

17. The airbag module of claim 16 including a control unit controlling said first actuator and said second actuator.

18. The airbag module of claim 17 wherein said control unit controls said first actuator to actuate said first block independently from said second actuator.

19. The airbag module of claim 13 including a third opening for said airbag and a third block in communication with said inflator.