초록 ▼

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 t

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.

대표청구항 ▼

An electrically actuatable initiator comprising: a retainer; at least one terminal for electrical connection with vehicle circuitry; means for supporting said terminal in spaced relation to said retainer and for providing electrical insulation between said terminal and said retainer; a bridgewire as

An electrically actuatable initiator comprising: a retainer; at least one terminal for electrical connection with vehicle circuitry; means for supporting said terminal in spaced relation to said retainer and for providing electrical insulation between said terminal and said retainer; a bridgewire associated with said terminal for, when electrically actuated by current from said terminal, generating thermal energy; an ignition charge ignitable by said thermal energy; a metal ignition cup enclosing and supporting said ignition charge, said metal ignition cup being spaced apart from said retainer; means for electrically insulating said metal ignition cup, comprising a plastic insulation cup overlying said metal ignition cup; an electrically conductive output charge overlying said insulation cup; and an electrically conductive output cup overlying said output charge, said insulation cup blocking flow of electric current from said output charge or said output cup to said ignition cup.