Initiator assembly for air bag inflator

Details Initiator assembly for air bag inflator Initiator assembly for air bag inflator

1995-08-22

1996-09-24

Dickson, Paul N.

Land vehicles

Wheeled

Attachment

280741, 102530, B60R 2126

Patent

active

055583660

ABSTRACT:
An initiator assembly (140) comprises a retainer (46), which can be the cover for an inflator housing (10), and an igniter (142). An opening (85) is formed in the retainer (46). The igniter (142) has a longitudinal axis (143) and comprises a pyrotechnic material (152, 156) on the axis. The pyrotechnic material (152, 156) on ignition exerts a force along the axis (143). The assembly further comprises a preformed compressible plastic coupler plug (148) which includes a plug portion (170) received within the retainer opening (85). The coupler plug (148) comprises locking surfaces (184, 188) which engage the igniter (142) and the retainer (46) and hold the igniter in a spaced relationship with respect to the retainer. The plastic coupler plug (148) further comprises an inwardly extending compressible web (174) integral with the locking surfaces (184, 188). The compressible web (174) provides a seal in the space between the igniter (142) and the retainer (46). On ignition of the igniter pyrotechnic material (152, 156), the resulting axial force in the igniter (142) causes the web (174) to be compressed between opposed surfaces (194, 196) of the igniter and the retainer, respectively, increasing the seal tightness of the compressible web (174).

REFERENCES:
patent: 5131679 (1992-07-01), Novak et al.
patent: 5221109 (1993-06-01), Marchant
patent: 5269560 (1993-12-01), O'Loughlin et al.

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