A glass-metal feedthrough includes: an external conductor including steel, having a coefficient of expansion .sub.external, and having an opening formed therein; an internal conductor disposed in the opening, the internal conductor including steel and having a coefficient of expansion .sub.internal. The external conductor and the internal conductor are configured to not release nickel when in contact with a human or animal body or biological cells of a cell culture. A glass material surrounds the internal conductor within the opening and has a coefficient of expansion .sub.glass. The coefficient of expansion .sub.external of the external conductor and the coefficient of expansion .sub.internal of the internal conductor both are greater than the coefficient of expansion .sub.glass of the glass material.

An igniter assembly including, an igniter, a metal collar arranged around the igniter, and a resin joining portion, the collar including, a joining surface portion having an annular surface covered with the resin joining portion, a first joining groove opened in the annular surface and including a first inner circumferential edge that has a first corner portion formed on the entire circumference of the first inner circumferential edge, and a second joining groove opened in an inner wall surface of the first joining groove and including a second inner circumferential edge that has a second corner portion formed on the entire circumference of the second inner circumferential edge, and the joined state being established when the resin joining portion enters the first joining groove and the second joining groove in a state in which the resin joining portion presses the first corner portion and the second corner portion.

An igniter assembly including, an igniter, a metal collar arranged around the igniter, and a resin joining portion, the collar including, a joining surface portion having an annular surface covered with the resin joining portion, a first joining groove opened in the annular surface and including a first inner circumferential edge that has a first corner portion formed on the entire circumference of the first inner circumferential edge, and a second joining groove opened in an inner wall surface of the first joining groove and including a second inner circumferential edge that has a second corner portion formed on the entire circumference of the second inner circumferential edge, and the joined state being established when the resin joining portion enters the first joining groove and the second joining groove in a state in which the resin joining portion presses the first corner portion and the second corner portion.

The invention describes an igniter support (22) for an igniter unit (20) of a gas generator (10), comprising a first holder element (30) made from a first material and a second holder element (32) made from a second material different from the first material. Both holder elements (30, 32) can be positively coupled to each other. Further, a subassembly (16), a gas generator (10) and a method for manufacturing a gas generator (10) are described.

The invention describes an igniter support (22) for an igniter unit (20) of a gas generator (10), comprising a first holder element (30) made from a first material and a second holder element (32) made from a second material different from the first material. The two holder elements (30, 32) can be positively coupled to each other, especially can be at least partially positively nested. Further, a subassembly (16), a gas generator (10) as well as a method for manufacturing a gas generator (10) are described.

A glass-metal feedthrough consists of an external conductor, a glass material and an internal conductor. The internal conductor has a coefficient of expansion .sub.internal, the glass material has a coefficient of expansion .sub.glass, and the external conductor has a coefficient of expansion .sub.external. The coefficient of expansion of the internal conductor .sub.internal is greater than the coefficient of expansion of the glass material .sub.glass and the coefficient of expansion of the external conductor .sub.external is at least 2 ppm/K, such as at least 4 ppm/K, greater than the coefficient of expansion of the glass material .sub.glass in the temperature range of 20 C. to the glass transformation temperature.

An electro-pyrotechnical igniter includes a metal case, a cap and a plastic overmolding. The metal case contains pyrotechnical material and includes at least one vent on a side wall thereof. The cap is made from electrically insulating material and covers the metal case at least at the at least one vent. The plastic overmolding covers at least one end of the cap. The metal case includes at least one shoulder arranged between the side vent and a zone of the metal case across from the end of the cap covered by the overmolding.

An electro-pyrotechnical igniter includes a metal case, a cap and a plastic overmolding. The metal case contains pyrotechnical material and includes at least one vent on a side wall thereof. The cap is made from electrically insulating material and covers the metal case at least at the at least one vent. The plastic overmolding covers at least one end of the cap. The metal case includes at least one shoulder arranged between the side vent and a zone of the metal case across from the end of the cap covered by the overmolding.

An igniter for propulsion unit including a receptacle having at least one opening through which passes a conducting line connected to an ignition carrier of a slapper contained within the receptacle, the igniter being characterized in that at least one elastomer material is disposed between the ignition carrier and the opening such that the pressure of the gases generated by the propulsion unit which is ignited pushes the elastomer material at the vicinity of the opening of the receptacle so that this elastomer material blocks the opening and avoids any gas leak through this opening.

An igniter for propulsion unit including a receptacle having at least one opening through which passes a conducting line connected to an ignition carrier of a slapper contained within the receptacle, the igniter being characterized in that at least one elastomer material is disposed between the ignition carrier and the opening such that the pressure of the gases generated by the propulsion unit which is ignited pushes the elastomer material at the vicinity of the opening of the receptacle so that this elastomer material blocks the opening and avoids any gas leak through this opening.