Air bag door with tear seam

Details Air bag door with tear seam Air bag door with tear seam

1992-06-08

1994-01-11

Focarino, Margaret A.

Land vehicles

Wheeled

Attachment

B60R 2116

Patent

active

052774430

ABSTRACT:
A cover (10) of integral construction for an air bag comprising: a panel (20) and a hinge (26) formed in a first side (28) of the cover (10) for enabling the panel to rotate thereabout after the panel separates from a seam on the opposite side of the panel in response to forces imparted thereto by an expanding air bag. The seam includes stress enhancing features for increasing stresses in the material causing same to tear and separate. These stress enhancing features includes a laterally extending narrow first portion (42), a closely spaced laterally extending narrow second portion (44) and a thin bridge (46) joining the first and second portions (42,44). The first portion, second portion and bridge are relatively movable one to the other so as to generate in the material at least two zones of increased tensile stress and at least two zones of increased compressive stress sufficient to cause the material to tear.

REFERENCES:
patent: 4895389 (1990-01-01), Pack, Jr.
patent: 4938503 (1990-07-01), Muraoka et al.
patent: 4995638 (1991-02-01), Shinto et al.

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