A gas generator includes a housing and a gastight container which accommodates a gas generating agent. The gastight container includes a cup body and a cover body. The cover body includes a bottom portion and a fold-over portion which covers an opening end of the cup body. The cover body is fixed to the cup body by providing, in the fold-over portion in a portion covering an outer circumferential surface of the opening end of the cup body, a first swaging portion in a portion of the fold-over portion which corresponds to a sidewall portion of the cup body and defines a gas generating agent accommodation chamber at a position adjacent to the bottom portion and a second swaging portion in a portion opposed to a portion of the fold-over portion which covers an inner circumferential surface of the opening end of the cup body.

A gas generator (10) comprises a housing (12) in which a conical combustion chamber screen (52) terminates the combustion chamber (44). On the front side, the combustion chamber screen (52) is closed by an end cap (54) to which a filter element (60) is connected which has one or more axially projecting centering extensions (64) on the edge of the filter bottom (62).

A gas generator includes a housing, an ignition device attached to one end side of the housing, a combustion chamber, a diffuser portion formed on the other end side and including a closed end, an open end, and a side wall positioned between the closed end and the open end, a plurality of gas discharge ports formed in the diffuser portion and including a first gas discharge port having a short distance from the combustion chamber and a second gas discharge port having a long distance from the combustion chamber, and a total opening area of the first gas discharge port and a total opening area of the second gas discharge port are different from each other, and a filter accommodated in the accommodating space, the filter extending from a side of the open end toward a side of the closed end in the diffuser portion.

In an assembly group comprising a cap of a tubular gas generator and a deflector element that deflects gas flowing out of at least one outflow opening of the cap to at least one discharge opening of the deflector element, a deflection surface of the deflector element is arranged radially outwardly of the outflow opening. At least two securing arms of the deflector element extend through the outflow opening and engage behind an edge defining the outflow opening on an inside in a positive connection with the cap. The cap is fixed firmly to an axial end of the tubular gas generator. Subsequently, the deflector element is slid from an outside of the cap with its securing arms through the outflow opening, the securing arms forming a positive connection with the edge of the outflow opening which fixes the deflector element firmly to the cap.

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 present invention provides a gas generator including a housing having a circumferential wall provided with gas discharge ports, a cylindrical filter being disposed inside the housing an ignition device chamber being formed inside a cup-shaped ignition device chamber housing fitted to the cylindrical wall of the bottom plate of the housing, and accommodating an ignition device, a combustion chamber being located between the cylindrical filter and the ignition device chamber housing and being charged with a gas generating agent, the ignition device chamber housing having a flange at an opening thereof and being fitted to the cylindrical wall such that the flange is abutted against the bottom plate, an annular retainer being disposed between the cylindrical filter and the ignition device chamber housing and having an annular base portion and an annular wall extending from an outer circumferential edge of the annular base portion toward the top plate, and the annular wall being abutted against an inner circumferential surface of the cylindrical filter, the annular base portion being abutted against the bottom plate of the housing, and the annular base portion and the flange of the cup-shaped ignition device chamber housing not being overlapped in a thickness direction.

The invention relates to an inflator (10) comprising an ignition unit (30) having an igniter (31), a chamber (20) arranged axially downstream of the ignition unit (30) and a diffuser chamber (40) arranged axially downstream of the chamber (20) which is comprised by a diffuser (42), wherein a combustion chamber screen (50) having an igniter-side end (51) and a diffuser-side end (52) is disposed in the chamber (20), the combustion chamber screen (50) being tapered, especially conically, in the longitudinal direction (L) of the inflator (10) from the igniter (31) toward the diffuser (42).

A flattened expanded metal strip (9) is wrapped into an airbag inflator filter (21) with the strip oriented such that the flattened rough side (17) of the strip is pointing toward the inside diameter (ID) of the filter and the flattened smooth side (15) is pointing towards the outside diameter (OD). With this orientation, the filter (21) is able to capture more slag than filters made using the standard wrapping method in which the smooth side is oriented inward. The expanded metal can be of various types including, for example, variable expanded metal (VEM) or standard expanded metal (SEM).

A filter for use in safety air bags as employed in vehicles and the like comprises one or more compressed grooved wires, wherein the wire or wires have an outer diameter of about 0.010 to 0.050 inches and the grooves have a depth in the range of 0.001 to about 0.005 inches. A plurality of grooves, preferable about 10-14, of about 0.018 diameter stainless steel wire, having a depth of about 0.001 inches to about 0.0025 inches, are equally spaced about the periphery of the wire, which is cylindrical. The pitch of the groove spacing may differ for different implementations. The wire outer surface between grooves may have a radius, preferably about 0.0025 inches in a wire of about 0.018 inches diameter. A stainless steel wire is preferred, but other wire metals may be used according to a given implementation.

A filter for gas generator has an outer geometry substantially of a hollow cylinder and it is formed by a wound body of a metal wire. The metal wire is made of an elongated member having a V-shaped cross-section orthogonal to a direction of extension thereof. A V-shaped groove defined in the metal wire faces a hollow portion in the filter for gas generator and an angle of the V-shaped groove is not smaller than 130[] and not greater than 140[].