Gas bag for a vehicle occupant restraint system and a gas bag module

• US 6,883,832 B2
• Filed: 01/27/2003
• Issued: 04/26/2005
• Est. Priority Date: 01/30/2002
• Status: Expired due to Fees

• Current Assignee: TRW Automotive Safety Systems GmbH (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: TRW Automotive Safety Systems GmbH (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Keutz, Markus
• Primary Examiner(s): Ilan, Ruth
• Application Number:
  US10/352,016
• Publication Number:
  US 20030141702A1
• Time in Patent Office: 820 Days
• Field of Search: 280/743.2, 280/743.1, 280/731, 280/729
• US Class Current: 280/743.2
• CPC Class Codes: B60R 2021/161 characterised by additional means for controlling deployment trajectory
• CPC Class Codes: B60R 2021/21525 the lid being fixed on the bag, or forming part of the bag wall, or the bag itself being used as wall liner
• CPC Class Codes: B60R 21/203 in steering wheels or steering columns
• CPC Class Codes: B60R 21/217 Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
• CPC Class Codes: B60R 21/231 characterised by their shape, construction or spatial configuration

Abstract

A gas bag for a vehicle occupant restraint system comprises a gas bag wall, which in the unfolded state of the gas bag (22) delimits an indentation (30) with an orifice (28) or an opening, and a closure piece (40) fastened to the gas bag wall, which in the inflated state moves in front of the orifice (28:) of the indentation or in front of the opening and covers it. The closure piece (40) is formed from at least two covering pieces, arranged one over the other, overlapping each other, which respectively have a margin section which is not fastened to the gas bag wall.

Claims

1. A gas bag for a vehicle occupant restraint system, with a gas bag wall, which in the unfolded state of the gas bag (22) delimits an indentation (30) with an orifice (28) or an opening, and a closure piece (40) fastened to the gas bag wall, which in the inflated state moves in front of the orifice (28) of the indentation or in front of the opening and covers it, characterized in that the closure piece (40) is formed from at least two covering pieces, arranged one over the other, overlapping each other, which respectively have a margin section which is not fastened to the gas bag wall.

2. A gas bag according to claim 1, characterized in that the non-fastened margin sections are arranged so as to be staggered with respect to each other.

3. The gas bag according to claim 1, characterized in that the covering pieces are fabric pieces (42, 44) which are sewn on to the gas bag wall.

4. The gas bag according to claim 3, characterized in that the fabric pieces (42, 44) are arranged so as to be slightly staggered with respect to each other and are fastened to the gas bag wall on their outer edges by means of an encircling seam (46) which does not take up all the margin sections of each individual fabric piece (42, 44).

5. The gas bag according claim 1, characterized in that the covering pieces are rectangular and the margin section of the one covering piece which is not fastened to the gas bag wall is opposed to the margin section of the other covering piece which is not fastened to the gas bag wall.