Inflator for air bag

Details Inflator for air bag Inflator for air bag

1995-10-05

1997-04-01

Johnson, Brian L.

Land vehicles

Wheeled

Attachment

280741, 137 6813, 137 6825, 222 3, 102531, B60R 2126

Patent

active

056159129

ABSTRACT:
An apparatus (20, 320, 420) for inflating an air bag comprises a cylindrical container (40, 340, 440) that includes a tubular housing (42, 342, 442), a pair of axially opposite end walls (44, 46, 444, 446), and a longitudinal central axis (A, B, C). The container (40, 340, 440) defines a fluid storage chamber (48, 348, 448) for storing inflation fluid at a first pressure. One of the end walls (44 or 46, 444 or 446) of the container (40, 340, 440) has an opening (62, 462) through which inflation fluid may flow from the fluid storage chamber (48, 348, 448). A rupturable closure (102, 502) extends across the opening (62, 462) to block the flow of inflation fluid through the opening. The closure (102, 502) ruptures in response to pressure in the fluid storage chamber (48, 348, 448) increasing to a predetermined second pressure to permit the flow of inflation fluid from the fluid storage chamber through the opening (62, 462). An ignitable material (148, 600) is located in the fluid storage chamber (48, 348, 448) adjacent another end wall (46 or 44, 446 or 444) of the container (40, 340, 440). An actuatable igniter (222, 622) has an end (228, 628) located in the fluid storage chamber (40, 340, 440) and is surrounded by the ignitable material (148, 600). The igniter (222, 622), when actuated, ignites the ignitable material (148, 600) to produce combustion products, including heat, which increase the pressure of the inflation fluid in the fluid storage chamber (48, 348, 448) to the predetermined second pressure for rupturing the closure (102, 502).

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