Air-bag

• US 20050006881A1
• Filed: 11/22/2002
• Published: 01/13/2005
• Est. Priority Date: 12/18/2001
• Status: Active Grant

• Current Assignee: Autoliv Development AB (Autoliv Incorporated)
• Original Assignee: Autoliv Development AB (Autoliv Incorporated)
• Inventors: Charpentier, Frederic
• Granted Patent: US 7,458,606 B2
• Time in Patent Office: Days
• US Class Current: 280/730.200
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/2346 Soft diffusers
• CPC Class Codes: Y10T 442/3179 Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified

Abstract

An air-bag is formed from two super-imposed layers of fabric which define between them at least one inflatable region. A gas supply duct extends into the air-bag. Apertures are formed in the gas supply duct. The gas supply duct is of elongate form, and is formed from a fabric having intersecting warp and weft yarns, the warp and weft yarns being inclined at an angle of between 30° and 60° and (preferably 45°) to the axis of the gas supply duct.

Claims

1. An air-bag, comprising two super-imposed layers of fabric which define between them at least one inflatable region, a gas supply duct extending into the air-bag, the gas supply duct being provided with at least one aperture therein through which a gas may flow into the inflatable region of the air-bag, the gas supply duct being of elongate form, and being formed of a fabric having intersecting warp and weft yarns, the warp and weft yarns of the fabric being inclined at an angle of between 30°

and 60°

to the axis of the gas supply duct.

2. An air-bag according to claim 1 wherein the warp and weft yarns are inclined at an angle of between 40°

and 50°

to the axis of the gas supply duct.

3. An air-bag according to claim 2 wherein the warp and waft yarns are inclined at an angle of 45°

to the axis of the gas supply duct.

4. An air-bag according to claim 1 wherein the spacing between the warp yarns is the same as the spacing between the weft yarns.

5. An air-bag according to claim 1 wherein the apertures of the gas supply duct is provided with circular apertures therein.

6. An air-bag according to claim 1 wherein the apertures of the gas supply duct are irregular-shaped.

7. An air-bag according to claim 1 wherein the gas supply duct is formed from a single elongate element of the fabric which is folded so that the opposed edges of the fabric are super-imposed, with the super-imposed edges being secured together by stitching.

8. An air-bag according to claim 1 is in the form of an inflatable curtain wherein the air-bag defining a plurality of inflatable regions, wherein the gas supply duct is arranged to extend along one side edge of the air-bag, the gas supply duct supplying gas to each of the inflatable regions.