The present invention provides a closing structure which closes, with an igniter, an opening of a cylindrical housing used in a gas generator, the cylindrical housing provided with a stepped surface formed on an inner side of a circumferential wall on the side of the opening, and a distal end circumferential wall extending from the stepped surface to the opening, the igniter having an igniter main body, and an igniter collar surrounding part of the igniter main body and having an annular plate portion with a maximum outer diameter and a circumferential wall excluding the annular plate portion, the annular plate portion including, a first annular surface facing the ignition portion of the igniter main body, a second annular surface facing the electroconductive pin of the igniter main body, and an annular circumferential surface between the first annular surface and the second annular surface, a first annular circumferential edge at the boundary between the first annular surface and the annular circumferential surface, and a second annular circumferential edge at the boundary between the second annular surface and the annular circumferential surface, and the second annular circumferential edge provided with an inclined surface in three or more locations, and the first annular surface of the igniter collar being abutted against the stepped surface of the cylindrical housing, and the annular circumferential surface and the second annular circumferential edge of the igniter collar being abutted against the distal end circumferential wall.

A filter for an inflator includes a rolled sheet centered on an axis or three dimensionally printed as a whole and including a plurality of openings. A deflector is associated with each opening for directing inflation fluid in a non-radial direction relative to the axis.

A gas generator including an igniter, a combustion chamber, and a restriction part, the igniter including an accommodating chamber accommodating an explosive therein, an ignition portion provided in the accommodating chamber, and a separating part including a pressure receiving surface, the separating part being configured to be separable from the igniter and movable in a predetermined direction, the combustion chamber being configured to burn a gas generating agent filled outside the accommodating chamber, by the combustion of the explosive, the restriction part provided in a predetermined position in the predetermined direction from the igniter and restricting a movement of the separating part, and the separating part including a guide that directs the combustion product of the explosive by the pressure receiving surface toward the igniter, in a state where the movement of the separating part in the predetermined direction is restricted by the restriction part.

A gas generator including an enhancer chamber provided on a first end of a cylindrical housing and including an igniter therein, a diffuser portion formed with a gas discharge port on a second end, a combustion chamber provided between the diffuser portion and the enhancer chamber, the enhancer chamber being an internal space which is axially sandwiched between the igniter and a cup-shaped partition wall, the internal space accommodating therein an enhancing agent, the cup-shaped partition wall including a peripheral wall provided with a peripheral wall body with a plurality of nozzles and an annular portion expanding outwardly from the peripheral wall body, an outer surface of the annular portion abutting against an inner wall surface of the cylindrical housing, a cylindrical gap being formed between the peripheral wall body and the inner wall surface, the nozzles being disposed to face the cylindrical gap, and the cylindrical gap being devoid of the gas generating agent therein.

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.

The invention relates to a gas generator (10), particularly a pyrotechnical tube gas generator, with an axial longitudinal direction (L), comprising an ignition unit (20), a combustion chamber (30) axially mounted downstream from the ignition unit (20) and comprising a combustion chamber bottom (35) forming a combustion chamber outlet (36), and a filter chamber (70) that is axially mounted downstream of the combustion chamber (30). According to the invention, at least one guiding sleeve (50) and a front-side baffle plate (80) are formed in the filter chamber, a first end (51) of the guiding sleeve (50), on the side of the combustion chamber, being axially mounted downstream from the combustion chamber bottom (35), and a second end (53) of the guiding sleeve (50) being associated with the baffle plate (80), a first deflection section being formed on the baffle plate (80) and the guiding sleeve (50) which allows a gas flow to an outer side of the guiding sleeve (50) into an annular first discharge chamber (75).

A gas generator assembly for an airbag module of a motor vehicle, including a generator housing with a first housing part and a second housing part, a combustion space formed in the generator housing for accommodating a pyrotechnic charge from which a gas for inflating a gas bag of the airbag module can be generated by combustion. At least one outlet opening is provided in the generator housing through which gas generated in the combustion space can be released for inflating the gas bag. At least one filter unit is arranged in the generator housing for filtering the gas generated from the pyrotechnic charge. The assembly includes a guide element arranged in the generator housing, by means of which the generated gas is guided to the at least one outflow opening. The guide element is of tubular form and has at least one deformation area.

The present invention provides a gas generator, including: a cylindrical housing; an ignition device installed at a first end of the cylindrical housing, and a diffuser portion installed at a second end thereof; a flow channel forming member disposed inside the cylindrical housing and including a partition wall which separates a first chamber from a second chamber; a combustion chamber formed in the first chamber; a discharge passage formed in the second chamber; a first cylindrical space formed on the outside of the first circumferential wall and a first communication hole formed in the first circumferential wall; a second cylindrical space formed on the outside of the second circumferential wall and being in communication with the first cylindrical space, and a second communication hole formed in the second circumferential wall; a cylindrical filter disposed in the second cylindrical space; an outer diameter (d1) of the first circumferential wall, an outer diameter (d2) of the second circumferential wall and an outer diameter (d3) of the cylindrical filter satisfying relationships of d1>d2 and d1d3; and between the cylindrical filter and the inner wall surface of the cylindrical housing, the second cylindrical space facing the second communication hole via the cylindrical filter.

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.

The present invention provides a gas generator including: a housing including a top plate, a bottom plate axially opposite to the top plate, and a circumferential wall located between the top plate and the bottom plate and provided with a gas discharge port; a partition wall having a single connection hole and a second communication hole, the partition wall being radially disposed in the housing to partition an interior of the housing into a first combustion chamber on the side of the top plate, which accommodates a first gas generating agent, and a second combustion chamber on the side of the bottom plate, which accommodates a second gas generating agent; an inner cylindrical member disposed in the housing to enclose the first igniter attached to the bottom plate, such that a second end opening side thereof passes through the connection hole in the partition wall in order to be located within the first combustion chamber, closer to the top plate than the partition wall is, and to be spaced from the top plate; the second end opening being closed by a first closing member and the second communication hole being closed by a second closing member; and the gas generating agent also being provided between the top plate and the second end opening closed by the first closing member.