Airbag with an adaptatively closable vent device

• US 20080042416A1
• Filed: 02/22/2007
• Published: 02/21/2008
• Est. Priority Date: 03/13/2006
• Status: Abandoned Application

• Current Assignee: Dalphi Metal Espana SA (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: Dalphi Metal Espana SA (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Tavares Da Silva Vinhas, Joana, Razazi, Donia
• Application Number:
  US11/709,921
• Publication Number:
  US 20080042416A1
• Time in Patent Office: Days
• US Class Current: 280/743.2
• CPC Class Codes: B60R 2021/23382 Internal tether means
• CPC Class Codes: B60R 21/2338 Tethers
• CPC Class Codes: B60R 21/2342 Tear seams
• CPC Class Codes: B60R 21/239 characterised by their venting means

Abstract

The invention relates to an airbag comprising an inflatable cushion (11) with the gas produced by a generator when a collisions occurs having a vent hole (13) made in the inflatable cushion (11) which is provided with a device (21) including a part (23) made of flexible material with at least one hole (25) fixed to the inside of the inflatable cushion (11) and incorporating means for allowing the separation thereof from the cushion (11) when the internal pressure in the cushion is lower than a predetermined limit (Pt) preventing it from closing the vent hole (13) and stop doing so when the internal pressure in the cushion (11) exceeds said predetermined limit (Pt) such that it completely or partially closes the vent hole (13) when it adheres to the cushion (11) due to the effect of the pressure.

Claims

1. An airbag comprising an inflatable cushion (11) with the gas produced by a generator when a collisions occurs having a vent hole (13) made in the inflatable cushion (11), characterized in that it also comprises a device (21) including a part (23) made of flexible material with at least one hole (25) which is fixed to the inside of the inflatable cushion (11) in the periphery of the vent hole (13) and has a surface that is greater than the surface of the cushion (11) delimited by the fixing points (27) of the part (23), and which incorporates means allowing the separation thereof from the cushion (11) when the internal pressure in the cushion (11) is lower than a predetermined limit (Pt) preventing it from closing the vent hole (13) and stop doing so when the internal pressure in the cushion (11) exceeds said predetermined limit (Pt) such that it completely or partially closes the vent hole (13) when it adheres to the cushion (11) due to the effect of the pressure.

2. An airbag according to claim 1, characterized in that said means consist of at least one clamp (33) made in the part (23) with a tear-off seam (35).

3. An airbag according to claim 1, characterized in that said means consist of at least one strap (43) joined at one if its ends to the part (23) and at the other end to the cushion (11) provided with tear-off means (45).

4. An airbag according to claim 1, characterized in that said part (23) does not have any hole (25) opposite to the vent hole (13) of the cushion (11) such that when the internal pressure of the cushion (11) exceeds the predetermined limit (Pt) a complete closing of the vent hole (13) occurs.

5. An airbag according to claim 1, characterized in that said part has at least one hole (25) opposite to the vent hole (13) of the cushion (11) such that when the internal pressure of the cushion exceeds the predetermined limit (Pt) a complete closing of the vent hole (13) occurs.

6. An airbag according to claim 2, characterized in that said part (23) does not have any hole (25) opposite to the vent hole (13) of the cushion (11) such that when the internal pressure of the cushion (11) exceeds the predetermined limit (Pt) a complete closing of the vent hole (13) occurs.

7. An airbag according to claim 3, characterized in that said part (23) does not have any hole (25) opposite to the vent hole (13) of the cushion (11) such that when the internal pressure of the cushion (11) exceeds the predetermined limit (Pt) a complete closing of the vent hole (13) occurs.

8. An airbag according to claim 2, characterized in that said part has at least one hole (25) opposite to the vent hole (13) of the cushion (11) such that when the internal pressure of the cushion exceeds the predetermined limit (Pt) a complete closing of the vent hole (13) occurs.

9. An airbag according to claim 3, characterized in that said part has at least one hole (25) opposite to the vent hole (13) of the cushion (11) such that when the internal pressure of the cushion exceeds the predetermined limit (Pt) a complete closing of the vent hole (13) occurs.