Initiator for an air bag inflator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 15, 1997
Grant Date -
N/A
app pub date -
Jan 12, 1995
filing date -
Jan 12, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrically actuatable initiator (10) for an air bag inflator (20) includes an electrically sensitive ignition charge (280) disposed in an electrically conductive ignition cup (290). A plastic insulation cup (320) overlies the ignition cup (290). The insulation cup (320) electrically insulates the ignition cup (290) to block the flow of electric current into the ignition cup to prevent unintended actuation of the ignition charge (280). A locking ring member (380) is made from a shape-memory alloy which shrinks in diameter when heated above a predetermined temperature. The locking ring member (380) secures an output cup (360) to a retainer (150) and hermetically seals between the output cup and the retainer. A second locking ring member (310) secures the ignition cup (290) to a header (150) and seals between the ignition cup and the header.
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