US 2001/0022146 A1Published application

Electro-pyrotechnic initiator built around a complete printed circuit

AssigneeLivbag SNC

InventorsDANIEL DUVACQUIER, CHRISTIAN PEROTTO

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Abstract

The invention relates to an initiator for a pyrotechnic gas generator intended for motor vehicle safety. The initiator (2) is built from a circuit support (10) on which conductive strips are printed which include electromagnetic protection and the ends of which are joined together by a resistive element covered with a thermosensitive charge (6). The conductive strips are connected to an electric cable (3). The support (10) is coated in a cylindrical overmoulded insulation (4, 5). A fragmentable cylindrical cap (8) containing an igniter composition (9) forms, together with the initiator (2), an igniter (1) for pyrotechnic generators intended for motor vehicle safety.

Claims13

Dependent claims

Electro-pyrotechnic initiator (2) connected to an electric cable (3) consisting of two conductive wires (13, 14) and comprising:

i) a thermosensitive charge (6) that can be initiated by a heating resistive element (15),
ii) an electric circuit connecting the said resistive element (15) to the said conductive wires (13, 14),
iii) means of electromagnetically protecting the said electric circuit,
characterized in that the said heating resistive element (15, 64, 74), the said electric circuit and the said means of electromagnetic protection are integrated into a circuit of conductive strips (11, 12) which are soldered to the said conductive wires (13, 14) and which are formed on a printed circuit support (10, 60, 70, 80) around which the said initiator is built.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 09/038,931Filed 9 Mar 1998
Priority: FR 97 027157 Mar 1997
Published: 20 Sep 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

F42B 3/121
Bridge initiators: initiators with incorporated integrated circuit
F42B 3/188
Safety initiators resistant to premature firing by static electricity or stray currents: having radio-frequency filters , e.g. containing ferrite…
F42B
Explosive charges

Family

US 6,389,972 B2Related patent
US 2001/0022146 A1This patent

From the US filing history. Foreign family members aren’t listed.

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