Airbag cushion with diffuser with cinch tube to vent gas for out-of-position conditions

• US 7,614,654 B2
• Filed: 12/07/2005
• Issued: 11/10/2009
• Est. Priority Date: 12/07/2005
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Williams, Jeffrey D.
• Primary Examiner(s): Fleming; Faye M.
• Application Number:
  US11/296,031
• Publication Number:
  US 20070126219A1
• Time in Patent Office: 1,434 Days
• Field of Search: 280/743.1, 280/740, 280/736
• US Class Current: 280/743.1
• CPC Class Codes: B60R 2021/23382 Internal tether means
• CPC Class Codes: B60R 21/2338 Tethers
• CPC Class Codes: B60R 21/2346 Soft diffusers
• CPC Class Codes: B60R 21/239 characterised by their venting means

Abstract

An airbag cushion is disclosed for use in automotive protective systems. The airbag cushion includes a diffuser for re-directing gas out of the cushion via cinch tubes when an obstruction is encountered.

Claims

1. An airbag module, comprising:

an inflatable airbag cushion;

a cinch tube disposed on the inflatable airbag cushion and circumventing an aperture disposed in the inflatable airbag cushion; and

a cinch cord coupled to the cinch tube and the inflatable airbag cushion such that upon inflatable airbag deployment with obstruction, the cinch cord does not fully extend and the cinch tube remains open, and upon inflatable airbag deployment without obstruction, the cinch cord extends and at least partially closes the cinch tube; and

a diffuser configured to re-direct inflation gas to the cinch tube from an inflator such that the gas rapidly exits the inflatable airbag cushion via the cinch tube when deployment of the airbag is obstructed;

wherein the diffuser is configured for alignment with the cinch tube if deployment is obstructed.

2. The airbag module of claim 1, wherein the diffuser has an opening to receive gas and at least one opening to re-direct the gas to the cinch tube.

3. The airbag module of claim 1, wherein the diffuser is attached to the inflatable airbag cushion.

4. The airbag module of claim 1,

wherein upon inflatable airbag deployment without obstruction, the cinch cord extends and completely closes the cinch tube;

and

wherein the diffuser is attached to the inflatable airbag cushion.

5. The airbag module of claim 1, wherein the cinch tube and the diffuser transition to being non-aligned if deployment is not obstructed, due to movement of the cinch tube relative to the diffuser, such that the inflation gas is directed out of the diffuser and into the airbag cushion, and such that the inflation gas is not directed out of the diffuser directly toward the cinch tube.

6. An airbag module, comprising:

an inflatable airbag cushion;

a cinch tube disposed on the inflatable airbag cushion and circumventing an aperture disposed in the inflatable airbag cushion; and

a cinch cord coupled to the cinch tube and the inflatable airbag cushion such that upon inflatable airbag deployment with obstruction, the cinch cord does not fully extend and the cinch tube remains open, and upon inflatable airbag deployment without obstruction, the cinch cord extends and at least partially closes the cinch tube; and

a diffuser configured to re-direct inflation gas to the cinch tube from an inflator such that the gas rapidly exits the inflatable airbag cushion via the cinch tube when deployment of the airbag is obstructed;

wherein the cinch tube comprises a sleeve extending around the majority of the perimeter of the cinch tube, and the sleeve has a sleeve aperture; and

wherein a portion of the cinch cord extends in the sleeve, and wherein the cinch cord further comprises at least one stopper configured to pass through the sleeve aperture upon airbag deployment and to resist entry into the sleeve aperture after airbag deployment.

7. An airbag module, comprising:

an inflatable airbag cushion;

a cinch tube disposed on the inflatable airbag cushion and circumventing an aperture disposed in the inflatable airbag cushion; and

a cinch cord coupled to the cinch tube and the inflatable airbag cushion such that upon inflatable airbag deployment with obstruction, the cinch cord does not fully extend and the cinch tube remains open, and upon inflatable airbag deployment without obstruction, the cinch cord extends and at least partially closes the cinch tube; and

a diffuser configured to re-direct inflation gas to the cinch tube from an inflator such that the gas rapidly exits the inflatable airbag cushion via the cinch tube when deployment of the airbag is obstructed;

wherein the diffuser and the cinch tube are configured to become non-aligned if deployment is not obstructed;

wherein the diffuser is attached to the inflatable airbag cushion; and

wherein the cinch cord is coupled to an internal surface of the inflatable airbag cushion and the cinch cord is disposed within an airbag interior.

8. An airbag module, comprising:

an inflatable airbag cushion;

a first cinch tube disposed on the inflatable airbag cushion and circumventing a first aperture disposed in the inflatable airbag cushion; and

a first cinch cord coupled to the first cinch tube and the inflatable airbag cushion such that upon deployment of the inflatable airbag cushion with obstruction, the first cinch cord does not fully extend and the first cinch tube remains open, and upon deployment of the inflatable airbag cushion without obstruction, the first cinch cord extends and at least partially closes the first cinch tube;

a second cinch tube disposed on the inflatable airbag cushion and circumventing a second aperture disposed in the inflatable airbag cushion; and

a second cinch cord coupled to the second cinch tube and extending around a majority of the perimeter of the second cinch tube, the second cinch cord further coupled to a surface of the inflatable airbag cushion such that upon deployment of the inflatable airbag cushion with obstruction, the second cinch cord does not fully extend and the second cinch tube remains open, and upon deployment of the inflatable airbag cushion without obstruction, the second cinch cord extends and at least partially closes the second cinch tube; and

a diffuser positioned within the inflatable airbag cushion to receive gas from an inflator,

wherein the diffuser has a first opening and a second opening,

wherein the openings of the diffuser are configured to re-direct inflation gas from an inflator,

wherein the openings of the diffuser and the cinch tubes remain aligned to enable inflation gas to rapidly exit the inflatable airbag cushion when deployment of the airbag is obstructed such that inflation gas exits the first cinch tube via the first opening of the diffuser and inflation gas exits the second cinch tube via the second opening of the diffuser, and

wherein the openings of the diffuser and the cinch tubes are configured to transition to non-alignment if deployment is not obstructed.

9. The airbag module of claim 8, wherein the first and second cinch tubes are symmetrically disposed on the airbag.

10. The airbag module of claim 8, further comprising a vent disposed on the airbag and adapted to vent gas during airbag deployment with and without obstruction.

11. An airbag module, comprising:

an inflatable airbag cushion;

a first cinch tube disposed on the inflatable airbag cushion and circumventing a first aperture disposed in the inflatable airbag cushion;

a second cinch tube disposed on the inflatable airbag cushion and circumventing a second aperture disposed in the inflatable airbag cushion;

at least one cinch cord coupled to the inflatable airbag cushion such that upon inflatable airbag deployment with obstruction, the cinch tubes remain open, and upon inflatable airbag deployment without obstruction, the cinch tubes are at least partially closed; and

a diffuser positioned to re-direct inflation gas from an inflator,

wherein the diffuser has a first opening and a second opening,

wherein the openings of the diffuser are configured to re-direct inflation gas from an inflator,

wherein the openings of the diffuser and the cinch tubes remain aligned to enable inflation gas to rapidly exit the inflatable airbag cushion when deployment of the airbag is obstructed such that inflation gas exits the first cinch tube via the first opening of the diffuser and inflation gas exits the second cinch tube via the second opening of the diffuser, and

wherein the openings of the diffuser and the cinch tubes are configured to transition to non-alignment if deployment is not obstructed.

12. An airbag module, comprising:

an inflatable airbag cushion;

a cinch tube disposed on the inflatable airbag cushion and circumventing an aperture disposed in the inflatable airbag cushion; and

a cinch cord coupled to the cinch tube and the inflatable airbag cushion such that upon inflatable airbag deployment with obstruction, the cinch cord does not fully extend and the cinch tube remains open, and upon inflatable airbag deployment without obstruction, the cinch cord extends and at least partially closes the cinch tube; and

a diffuser configured to re-direct inflation gas to the cinch tube from an inflator such that the gas rapidly exits the inflatable airbag cushion via the cinch tube when deployment of the airbag is obstructed, wherein the diffuser and the cinch tube are configured to be aligned if deployment is obstructed to permit rapid venting of inflation gas, and wherein the diffuser and the cinch tube are configured for transition to non-alignment if deployment is not obstructed.

13. The airbag module of claim 12, wherein the diffuser has an opening to receive gas and at least one opening to re-direct the gas to the cinch tube.

14. An airbag module, comprising:

an inflatable airbag cushion;

a first cinch tube disposed on the inflatable airbag cushion and circumventing a first aperture disposed in the inflatable airbag cushion;

a second cinch tube disposed on the inflatable airbag cushion and circumventing a second aperture disposed in the inflatable airbag cushion;

at least one cinch cord coupled to the inflatable airbag cushion such that upon inflatable airbag deployment with obstruction, the cinch tubes remain open, and upon inflatable airbag deployment without obstruction, the cinch tubes are at least partially closed; and

a diffuser having an opening to receive gas from an inflator, a first side opening, and a second side opening, wherein the diffuser is configured to re-direct inflation gas from an inflator to the cinch tubes via the side openings to enable gas to rapidly exit the inflatable airbag cushion when deployment of the airbag is obstructed; and

wherein the first side opening of the diffuser and the first cinch tube are configured to be aligned and the second side opening of the diffuser and the second cinch tube are configured to be aligned if deployment is obstructed to permit rapid venting of inflation gas, and wherein the diffuser and the cinch tubes are configured for transition to non-alignment if deployment is not obstructed.

15. The airbag module of claim 14, wherein the first and second cinch tubes are symmetrically disposed on the airbag.

16. The airbag module of claim 14, further comprising a vent disposed on the airbag and adapted to vent gas during airbag deployment with and without obstruction.

17. An airbag cushion module, comprising:

an inflatable airbag cushion;

means for venting gas out of the inflatable airbag cushion and circumventing an aperture disposed in the inflatable airbag cushion;

means for restricting gas venting by cinching the venting means to reduce the circumference of the venting means upon inflatable airbag deployment without obstruction and enabling the venting means to remain open upon inflatable airbag deployment with obstruction; and

means for diffusing gas by re-directing inflation gas to the venting means from an inflator such that the gas rapidly exits the inflatable airbag cushion via the venting means when deployment of the airbag is obstructed,

wherein the means for diffusing gas and the venting means are aligned if deployment is obstructed to permit rapid venting of inflation gas, and

wherein the means for diffusing gas and the venting means transition to non-alignment if deployment is not obstructed, due to movement of the venting means relative to the means for diffusing gas, such that the inflation gas is directed out of the means for diffusing gas and into the airbag cushion, and such that the inflation gas is not directed out of the means for diffusing gas directly toward the venting means.