Vehicle restraint system cushion with sacrificial tear seam

Details Vehicle restraint system cushion with sacrificial tear seam Vehicle restraint system cushion with sacrificial tear seam

1994-12-21

1996-04-30

Culbreth, Eric D.

Land vehicles

Wheeled

Attachment

280729, B60R 2116

Patent

active

055118216

ABSTRACT:
An inflatable air bag cushion for use in a vehicle restraint system that reduces the load experienced on the peripheral seam of a driver or passenger air bag to reduce or prevent combing of the cushion fabric. A sacrificial stitched seam 26 is sewn inboard of the standard peripheral seam 20 on the cushion. Upon inflation, the sacrificial seam tears at a predetermined cushion pressure slightly lower than the maximum. The outer stitched seam, composed of a stronger thread, survives throughout the cushion deployment. The final load experienced by the outer stitched seam and adjacent fabric is reduced. As a result, lower strength fabrics may be utilized which will reduce overall cushion costs.

REFERENCES:
patent: 4186941 (1980-02-01), Scholz et al.
patent: 5048863 (1991-09-01), Henseler et al.
patent: 5094477 (1992-03-01), Togawa
patent: 5280954 (1994-01-01), Henseler et al.
patent: 5421610 (1995-06-01), Kavanaugh et al.

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