A gas generator for use for a safety device in vehicles comprises a pyrotechnical propelling charge, wherein the propelling charge is formed from a first and at least a second master batch which are in a mixed state in a filling. Each master batch has a plurality of molded propellant bodies having defined geometry and having a relative quickness. The relative quickness RQ2 of the second master batch is less than the relative quickness RQ1 of the first master batch, wherein RQ2=RQ1.Math.fq and fq≤0.9. The invention further relates to a method for producing the propelling charge.

A gas generator includes an igniter, a cup-shaped member, and a fixing member. The cup-shaped member accommodating an enhancer agent bursts or melts at the time of activation. The fixing member fixing a filter does not burst and melt even at the time of activation. Ra and Ha satisfy a condition of Ra/Ha 1.00 where Ra represents an inner diameter of a sidewall portion of the cup-shaped member and Ha represents a distance between a top wall portion of the cup-shaped member and the igniter. The sidewall portion includes a first region surrounded by a partition wall portion of the fixing member and a second region not surrounded by the partition wall portion. The partition wall portion has an end portion arranged closer to a top plate portion than the igniter. A gas generating agent is arranged to face the top wall portion, the second region, and the partition wall portion.

A gas generator includes a housing, a combustion chamber accommodating therein a gas generating agent burned by an ignition device, a plurality of gas discharge ports provided to a wall surface that defines the combustion chamber, and communicating an inside and an outside of the combustion chamber, and a plurality of closing members respectively closing the plurality of gas discharge ports. Each of the plurality of closing members includes a covering region covering a corresponding gas discharge port of the plurality of gas discharge ports, and a joining region being joined to the wall surface of the housing, and formed adjacent to and surrounding the covering region. The joining region of each of the plurality of closing members is joined to the wall surface at a width within a range from 1 mm to 5 mm, inclusive, from a peripheral edge of the corresponding gas discharge port, and without interfering with another joining region.

A gas generator includes a housing constructed by combining and joining a plurality of shell members. One of the plurality of shell members includes a cylindrical portion and a flange portion. The cylindrical portion is provided with a plurality of gas discharge openings including gas discharge openings different in opening area from one another. The flange portion is shaped such that a distance from an axial line of the cylindrical portion to an outer edge of the flange portion is non-uniform. When a perpendicular line is drawn to the axial line from a maximum outer geometry position in the outer edge of the flange portion most distant from the axial line, a gas discharge opening arranged closest to the perpendicular line is a gas discharge opening other than a gas discharge opening largest in opening area among the plurality of gas discharge openings.

A cylindrical inflator has an elongated tubular housing, a hollow tubular filter and a plurality of gas generant pellets. The elongated tubular housing has a first end sealed by an igniter assembly and an opposite second end sealed by a diffuser assembly. The diffuser assembly has a first set of discharge openings sealed by frangible foil, and a combustion chamber interposed and extending between the igniter assembly and the foil sealed diffuser assembly. The hollow tubular filter is positioned inside the combustion chamber and has an enlarged first end compressed against an inner wall of the elongated tubular housing and an elongated narrow portion extending from the enlarged first end of the hollow tubular filter toward the second end of the tubular housing.

The invention relates, among other things, to a gas generator for generating a driving gas for a vehicle safety device, wherein the gas generator comprises: an ignition device; fuel which, after ignition using the ignition device, generates the driving gas; an at least partially tubular carrier element, in the tube interior of which a combustion chamber for the fuel is located; an injection-moulded body which fixes the ignition device in the connection hole and is located with an inner portion inside the carrier element and with an outer portion outside the carrier element; a feed pipe which is connected to a pipe end of the carrier element and which conveys the driving gas out of the combustion chamber; and a lid sealing the combustion chamber.

A gas generator, including an igniter provided in a cylindrical housing, a combustion chamber filled with a gas generating agent, and being provided within the cylindrical housing; and a diffuser portion including a gas discharge port being coupled to the cylindrical housing, the diffuser portion including a bottom surface, a peripheral wall having the gas discharge port, and an opening, the diffuser portion including therein a cylindrical filter covering, from an inside of the diffuser portion, the gas discharge port, the cylindrical filter being disposed such that a first annular end face thereof abuts against the bottom surface of the diffuser portion and a second annular end face thereof is located to be on a side of the opening of the diffuser portion, the cylindrical filter having an annular inclined surface extending in an obliquely inward direction from the first annular end face, and a trapping space for trapping a combustion residue contained in the combustion gas being provided so as to be surrounded by the bottom surface of the diffuser portion and the annular inclined surface.

An airbag inflator is provided, including an inflator module, an exhaust hood, a filter element, exhaust holes, and a flow-guiding loop. The exhaust hood corresponds to one end of the inflator module to form an accommodating space in a concave shape, and the exhaust hood is set on the inflator module by the accommodating space. The filter element is disposed on the sidewall of the exhaust hood and covers the exhaust holes. The exhaust holes are disposed on the sidewall of the exhaust hood and are adjacent to the exhaust hood opposite to one end of the inflator module. One side of the flow-guiding loop is attached to the exhaust hood corresponding to one side of the inflator module, and the other side of the flow-guiding loop extending to the inflator module to form an annular convex rib.

A tablet, a gas generator and a gas generating device are provided, wherein the tablet comprise a tablet body, the tablet body comprises opposite first and second sides, the tablet body is provided with a vent hole running from the first side to the second side, the first side is provided with a first positioning structure, and the second side is provided with a second positioning structure that cooperates with the first positioning structure. By the smart design of the tablet structure, the present disclosure can effectively simplify the structure of the gas generator and reduce the manufacturing cost.

The present disclosure relates to a gas generator comprising a housing, an igniter and a pyrotechnic charge via which gas for filling a gasbag can be provided, wherein the gas generator is free from stored pressurized gas in the idle state, characterized in that each possible diffusion path out of the internal chamber of the housing is sealed relative to the environment of the gas generator by means of a weld seam. The present disclosure also relates to a method for leak testing a pyrotechnic gas generator of this type, wherein, before the gas generator is welded against diffusion, a test amount of helium is introduced into the housing and, in a subsequent leak testing step, a measurement is carried out to determine whether helium is passing out of the housing.