Electro-pyrotechnic initiator built around a complete printed circuit
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United States of America Patent
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-
Apr 1, 2003
Grant Date -
Jun 27, 2002
app pub date -
Jan 7, 2002
filing date -
Mar 7, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electro-pyrotechnic initiator suitable for use in igniting a pyrotechnic generator of gas for inflating an air bag, said initiator being connected to an electric cable comprising two conductive wires, said initiator comprising: (i) a thermosensitive charge which is carried by a heating resistive element consisting of a resistive strip and which is initiatable by said heating resistive element, ((ii) an electric circuit connecting said resistive element to said conductive wires, and (iii) means of electromagnetically protecting said electric circuit, said heating resistive element, said electric circuit and said means of electromagnetically protecting being integrated into a circuit of conductive strips which are joined to said conductive wires and which are printed on a support, said support being in the form of a thin parallelepedial card with two opposite flat faces, said conductive strips being printed on the same face of said support to provide a complete circuit comprising said conductive strips, the heating resistive element covered by the thermosensitive charge and the means of electromagnetic protection around which said initiator is built, said circuit support being partially coated with an overmoulded, insulation.
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