Airbag venting mechanism

Details Airbag venting mechanism Airbag venting mechanism

1996-07-09

1998-03-10

Rice, Kenneth R.

Land vehicles

Wheeled

Attachment

B60R 2130

Patent

active

057252440

ABSTRACT:
An airbag for use in a vehicle occupant protection system has a venting mechanism which allows inflation gas to vent from an inflation chamber through an expandable venting member. The expandable venting member has an inner surface defining an extension of the inflation chamber. The venting member is formed of a gas permeable material and is expandable from a first compressed configuration to a second expanded configuration in response to the inflation pressure in the inflation chamber. While in the compressed configuration the venting member is retained by a retaining member that is not permeable to the inflation gas and has a frangible portion. When the inflation pressure in the airbag reaches a preselected level the frangible portion of the retaining member breaks and the venting member is expanded through the broken portion of the retaining member by the inflation gas. In the expanded configuration the venting member allows the inflation gas to vent to the atmosphere.

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