A propellant cage (10) for a tubular inflator (100), especially for a tubular inflator (100) of an airbag module, for forming a propellant chamber (14) and a flow passage (15) of the tubular inflator (100). The propellant cage (10) is in the form of a propellant cage spiral spring (11) having a gas inlet-side end (12) and a gas outlet-side end (13), the gas inlet-side end (12) having a smaller cross-section than the gas outlet-side end (13).

An airbag inflator includes a pressure vessel with a bottom portion, a top portion and a center structure connecting the bottom portion and the top portion. The top portion includes an exit orifice that is closed with a rupturable membrane. An energetics cover attached to the center structure houses a pyrotechnic material, and a diverter is attached to the top portion. The pressure vessel, the energetics cover and the diverter define a gas flow path from inside the energetics cover toward the bottom portion of the pressure vessel, the gas flow path turning at least a first 180 degrees toward the top portion of the pressure vessel and between the energetics cover and the pressure vessel. The longer gas flow path allows time for multi-perforation grain slivers to burn up before exiting the inflator, thereby reducing the amount of particulate exiting the inflator.

Systems and methods are disclosed in which a seal is formed between an interior of an airbag inflator base and an exterior environment. A polymeric member of a membrane seal can form a solid state bond with an overmold of an electrical connector of an initiator of an airbag inflator. Furthermore, an adhesive film of the membrane seal can bond to the airbag inflator base at a position disposed at least partially around a recess through which the overmold couples an initiator to the airbag inflator base.

The invention relates to a gas generator (10), especially for a vehicle safety system, comprising a sleeve (60) positioned inside the gas generator (10) which sleeve has first flow orifices (68) and encloses an ignition chamber (52) including first propellant (50), wherein a combustion chamber (56) filled with a second propellant (54) is connected to the outside of the sleeve (60), the combustion chamber being surrounded by a diffusor (70) located inside the gas generator (10) and having second flow orifices (78), and comprising a baffle plate (12) which has third flow orifices (14) and surrounds the diffusor (70), wherein the sleeve (60), the diffusor (70) and the baffle plate (12) are adhesively bonded to each other.

A gas generator includes an elongated cylindrical housing main body and a plug which closes an axial end portion of the housing main body. The plug made of a metal includes a substantially columnar body portion, a first flange portion located on a side of a first end surface, and a second flange portion located on a side of a second end surface. An annular groove portion defined by the body portion, the first flange portion, and the second flange portion is located in a circumferential surface of the plug. A metal flow in a portion which appears in a surface layer of the circumferential surface of the plug including a surface of the annular groove portion continuously extends to reach the second end surface from the first end surface along the circumferential surface without discontinuity in the circumferential surface.

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.

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.

Provided is a gas generator including a housing including a top plate, a bottom plate, and a peripheral wall, the bottom plate being axially opposite the top plate, and the peripheral wall including a gas discharge port and being located between the top plate and the bottom plate. In the gas generator, an internal space of the housing is separated into a first combustion chamber and a second combustion chamber by a partition wall axially and radially partitioning the internal space of the housing, the first combustion chamber being formed to accommodate a first gas generating agent and being on the top plate side, and the second combustion chamber being formed to accommodate a second gas generating agent and being on the bottom plate side. A first igniter and a second igniter are disposed at the bottom plate, the first igniter being configured to burn the first gas generating agent, and the second igniter being configured to burn the second gas generating agent. The partition wall includes a cylindrical portion and an annular portion, the cylindrical portion being formed to surround the first igniter and include a communication hole for making the first combustion chamber and the second combustion chamber to communicate with each other, and the annular portion being formed extend radially outward from a second opening on the top plate side of the cylindrical portion. A first opening of the cylindrical portion axially opposite the second opening is in contact with the first igniter, and an outer periphery of the annular portion is in contact with the peripheral wall of the housing, and, thereby, the first combustion chamber and the second combustion chamber are separated from each other.

A roof airbag apparatus may include: a first-row deployment part deployed from the front to the rear of a roof so as to cover a front area, when gas is supplied from a gas supply part; a second-row deployment part coupled to a front end of the first-row deployment part so as to communicate with the first-row deployment part, and configured to cover a rear area which is deployed to the rear when the first-row deployment part is deployed; and an auxiliary deployment part coupled to a top or bottom surface of the first-row deployment part so as to communicate with the first-row deployment part, and configured to increase/decrease the top-to-bottom thickness of the first-row deployment part, when deployed.

An inflator as well as a method of manufacturing an inflator, a module including an inflator and an airbag module. In an inflator, especially for a protective device in a vehicle, comprising plural components a sealant is applied in the area of abutting components, especially a sealant which adheres to both abutting components.