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Airbag

  • US 6,722,693 B2
  • Filed: 03/05/2003
  • Issued: 04/20/2004
  • Est. Priority Date: 04/02/2002
  • Status: Active Grant
First Claim
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1. An airbag comprising an airbag body and a wrapping member made tearable for keeping said airbag body in the folded-up configuration, wherein:

  • said airbag body is folded and housed in the peripheral edge of an opening on the inner side of a vehicular body, and is so wrapped by said wrapping member after being folded as to expand and inflate to cover said opening when the inflation gas flows in;

    said wrapping member comprises a plurality of flexible wrapping yarns;

    said wrapping yarns in plurality are wound around the outer circumference of said airbag body as folded into a generally rod-like shape over the entire length of the wrapping area of said airbag body, along the axial direction of said airbag body and in a manner to intersect said axial direction obliquely;

    at least two wrapping yarns out of said wrapping yarns in plurality are wound around said folded airbag body from opposite directions to each other in the wrapping area;

    the distance between the adjacent yarns along the axial direction of said folded airbag body is within the range of 20 to 60 mm, with respect to the wrapping yarns wound in the same direction in the wrapping area, when a plurality of said wrapping yarns are wound around said folded airbag body; and

    the yarn strength according to JIS L 1013.7.5 of each of said wrapping yarns is within the range of 7.4 to 65N.

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