Abstract: A hybrid gas generator comprises a chamber that contains pressurized fluid and that is sealed off by a rupturable membrane, and a pyrotechnical propellant charge that ruptures the membrane when it is ignited. The gas generator further comprises a nozzle wall that is arranged between the propellant charge and the membrane and that has at least one passage opening through which combustion products generated upon ignition of said pyrotechnical propellant charge flow towards the membrane. The passage opening has such a shape and is oriented with respect to the membrane in such a way that, when the membrane is ruptured, there are formed sections of said membrane that remain all connected to an edge of the membrane.

Abstract: A gas generator comprises a housing and a propellant contained in the housing, the propellant, after activation, releases a fluid which is under pressure, and the housing has a first and a second housing part, which are movable relative to each other under pressure and form an overflow opening with a variable flow area depending on the pressure in the housing. Either the first or the second housing part, or both, have spacing means, the spacing means are designed so that in the case of the relative movement of the housing parts with respect to each other, a minimum value of the variable flow area is maintained.

Abstract: A transport assembly comprises a gas generator having an outer housing which has at least one outflow opening arranged such that a thrust force is exerted onto the outer housing during an outflow of generated gas. The transport assembly further comprises a removable transport cover which is detachably fastened to the outer housing and extends around the outflow opening of the outer housing. Further outflow openings are arranged in the transport cover such that the transport assembly as a whole remains neutral with respect to thrust on activation of the gas generator. A plug connection is provided between the transport cover and the outer housing.

Abstract: The invention relates to a method of producing an igniter for a gas generator. The igniter contains a charge sleeve which has an open end. The method comprising the following steps: A pyrotechnic ignition charge is introduced via the open end into the charge sleeve such that an edge of the charge sleeve projects axially at the open end with respect to the ignition charge. The projecting part of the edge is shortened axially, and the open end is closed. The invention further relates to a charge sleeve which has a weakened zone running along its periphery, or has a section which is able to be removed from the remainder of the charge sleeve.

Abstract: A gas generator includes a housing, which has outflow openings for outflowing gas, and at least one destructible insulation foil which in a non-activated state of the gas generator closes at least one of the outflow opening so as to be moisture-tight. The insulation foil has a varying thickness. The varying thickness is provided by at least one thermally insulating foil layer with a varying thickness, which lies over a base layer.

Abstract: A gas generator includes a housing having an inner wall delimiting an igniter chamber peripherally, and at least one igniter opening into the igniter chamber. The gas generator further includes a cap arranged for displacement along the inner wall and delimiting the igniter chambe, said cap having a cylindrical peripheral wall and a radially extending cover wall. The peripheral wall has a first section extending from the cover wall in displacement direction (R) and a second section extending in a direction opposite thereto. The first and second sections lie against the inner wall and guide the cap during a displacement thereof. The cover wall is turned axially into the interior of the cap.

Abstract: A method of producing a gas generator housing part of a thin-walled tube (22, 24) and a connecting piece laterally mounted thereto, is characterized by the following steps: a) providing a tube (22, 24) having a wall thickness (WS) which amounts to a maximum of 10% of a tube external diameter (D) and a minimum tensile strength which amounts to at least approximately 800 N/mm2; b) providing a connecting piece having an external diameter (do) which amounts to between 15% and 40% of said tube external diameter (D); c) aligning said connecting piece radially to said tube (22, 24) such that an end face (78) of said connecting piece faces an outer face of said tube (22, 24); d) joining said tube (22, 24) and said connecting piece by friction welding, with producing a relative rotation between said tube (22, 24) and said connecting piece and moving said tube (22, 24) and said connecting piece towards each other, f) a maximum welding time amounts to less than 1 sec, preferably less than 0.

Abstract: A hybrid gas generator comprises an elongated cylindrical outer housing, and a pressure chamber that is filled with pressurized gas and that is closed off by a membrane provided on an end face of the pressure chamber. The gas generator further comprises a pyrotechnical propellant charge that is provided for opening the membrane and is accommodated in a preferably bushing-shaped propellant charge housing. The propellant charge housing is connected to the outer housing at a location outside of the pressure chamber and a longitudinal axis of the propellant charge housing extends at a right angle to a longitudinal axis of the outer housing. The generator also has an axial outflow opening situated at one axial end of the outer housing. The outer housing has a circumferential wall with a radial insertion opening for introducing the propellant charge housing.

Abstract: A gas generator comprises an elongated outer housing (10) that has end faces and a side wall, at least three stages (12, 14, 16; 112, 114, 116, 118) which can be activated independently of each other, and for each stage (12, 14, 16; 112, 114, 116, 118) an associated igniter unit (32, 34, 36; 132, 134, 136, 138). The igniter units (32, 34, 36; 132, 134, 136, 138) are mounted laterally to the side wall of the outer housing (10).

Abstract: A hybrid gas generator comprises a cylindrical outer housing having a longitudinal axis, and a pressure chamber which is filled with compressed gas and closed by a membrane. A pyrotechnic charge is provided for opening the membrane, the charge being accommodated in a preferably bush-shaped charge housing, which has a longitudinal axis arranged substantially at right-angles to the longitudinal axis of the outer housing and extends into the latter. There is also provided an outflow opening in the outer housing. Inside the outer housing there is a separate holding body provided for retaining the charge housing. The holding body is fastened to the charge housing and, additionally, to a part of the gas generator which is not destructed in an activated state of the gas generator.

Abstract: A gas generator comprises a container (12) filled with a pressurized fluid (14) and having an outflow opening (16), and a piston (20; 120) which is displaceably arranged in the container (12). The piston has a shutter opening (22; 122) dividing the container (12) into a first chamber (24) and a second chamber (26), the first and second chambers (24, 26) being filled with the fluid (14). The piston (20; 120) on activation of the gas generator (10; 100) and when the outflow opening (16) has been opened, is moved by a pressure prevailing in the second chamber (26) from a predetermined initial position (AP) in the direction towards the outflow opening (16) into an end position (EP) in which the end volume of the first chamber (24) is significantly reduced compared with the start volume of the first chamber (24). There is also proposed a method of operating such gas generator.

Abstract: A gas generating device comprises a gas generator (10) which has an outer housing (12), and a gas conduit pipe (50) which is connected to the gas generator (10) and via which a gas flows out from the gas generator (10). The outer housing (12) has at least two openings (40, 42) via which the gas conduit pipe (50) is fastened to the outer housing (12) and through which the gas can flow out when the gas conduit pipe (50) is not installed. The gas generator (10) is neutral with respect to thrust without the gas conduit pipe (50) arranged on it. The gas conduit pipe (50) projects into the interior of the gas generator (10) via at least one of the openings (40, 42).

Abstract: The invention relates to a gas generator for generating gases, comprising a housing which has an interior space and at least one combustion chamber filled with a predetermined quantity of solid propellant. The propellant consists of a plurality of solid propellant parts arranged in the combustion chamber in an irregular manner. The compressed gas is stored in a predetermined quantity in the combustion chamber and the combustion chamber constructed as a pressure chamber sealed hermetically toward outside in a non-activated state of the gas generator.

Abstract: A gas generator comprises a tubular housing of a pressure-resistant material and a propellant strand incorporated in the housing. The propellant strand is provided with an envelope surrounding the propellant strand. The envelope is dimensionally stable and substantially rests against the entire outer surface of the propellant strand. The envelope is formed such that in the case of an increase in pressure it expands and rests against the inner surface of the housing.

Abstract: A gas generator comprises a tubular housing of a pressure-resistant material and a propellant strand which is incorporated in the housing and provided with an envelope. At least one channel is provided between the envelope and the propellant strand so as to extend in an axial direction. The propellant strand has a substantially circular cross-section and the envelope has a polygonal cross-section.

Abstract: The invention relates to gas generator comprising an outer housing made of plastic, in which a pyrotechnic propellant charge and an igniter having its own igniter housing are accommodated. The igniter housing consists at least partially of plastic and is welded with the outer housing.

Abstract: The invention relates to a gas generator comprising at least two combustion chambers filled with propellant charges and delimited by combustion chamber walls. The combustion chamber walls have outflow openings which in a non-activated state are closed by at least one applied membrane having an edge. One of an additional fastening device and a protective device is provided at least sections of the edge of the membrane. The device prevents a coming-off of the membrane from the combustion chamber wall.

Abstract: The invention relates to a gas generator comprising a combustion chamber filled with a solid propellant, a supply chamber filled with a fluid and a mixing chamber in which a hot gas generated by combustion of the solid propellant is mixed with the fluid. A combustion chamber wall is provided that has a plurality of outflow openings through which the hot gas escapes. A fluid feed chamber is provided so as to lie, in terms of flow, between the combustion chamber and the mixing chamber, the hot gas passing through the fluid feed chamber. The fluid from the supply chamber flows into the fluid feed chamber and the fluid feed chamber is radially open towards the outflow openings across the entire circumference of each of the outflow openings, so as to direct an annular fluid stream onto the hot gas.

Abstract: The invention relates to a pyrotechnic gas generator comprising a gas-tight outer housing consisting of at least two parts, a first part of which being a receiving part for pyrotechnic material and a second part of which being a base part which is connected with the receiving part by welding so as to form the outer housing. One of both parts has a radially projecting, surrounding flange with an outer peripheral edge and the other part has an axially extending, rim-like projection circumferentially surrounding said peripheral edge and having an inner surface which is contacted by the peripheral edge. The welding of the first and second parts is provided at the flange.

Abstract: A component of a safety system in motor vehicles comprises a core which has end and side faces and is made of an explosive material. The component further comprises a jacket made of a solid semiconductor material that surrounds the explosive material on the side faces of the core, and an ignition element situated between electric contact surfaces on one of the end faces of the core. The ignition element initiates an ignition of the explosive material when current flows through it. The explosive material consists of a porous fuel and of an oxidizer incorporated into the porous fuel. The porous fuel and the solid semiconductor are made of the same material.