Abstract: The present invention relates to a gas generator, in particular for airbag modules in motor vehicles, comprising two generator stages which can be ignited independently of one another and each of which includes in its own pressure housing at least one igniter, at least one propellant charge and at least one combustion chamber. The two generator stages are arranged at least partly in a common filter housing together with a common filter unit arranged outside the pressure housing and a first generator stage is made in annular shape. A second generator stage is arranged centrally with respect to the first generator stage and is disposed at least partly above the first generator stage.

Abstract: The present invention relates to a gas generator, in particular for airbag modules in motor vehicles, comprising two generator stages each of which includes in its pressure housing at least one igniter, at least one propellant charge and at least one combustion chamber. An inner generator stage is arranged at least substantially inside an outer generator stage and the two generator stages are arranged at least partly in a common filter housing together with a common filter unit arranged outside a pressure housing of the outer generator stage.

Abstract: The present invention relates to a gas generator, in particular for airbag modules in motor vehicles, comprising a plurality of separate generator stages which can be ignited independently of one another and each of which includes in its own pressure housing at least one igniter, at least one propellant charge and at least one combustion chamber. The generator stages are arranged at least partly in a common filter housing together with a common filter unit and the space remaining in the filter housing is designed at least regionally as an outflow passage system leading from outflow apertures formed in the pressure housings to the filter unit.

Abstract: The invention relates to a gas generator for a safety system, in particular for a vehicle occupant restraint system, comprising a combustion chamber which contains propellant, a liquid chamber which contains liquid, and a mixing chamber in which a gas developed on burning of the propellant and the liquid mix with each other. The gas generator further comprises a liquid guide surface onto which the liquid when released is applied substantially tangentially, and a gas directing channel and a surface delimiting the gas directing channel. A flow break-off edge is provided in the mixing chamber, which flow break-off edge is defined on one side by the liquid guide surface and on the other side by the surface delimiting the gas directing channel.

Abstract: A gas generator for a safety system, in particular for a vehicle occupant restraint system, comprises a combustion chamber filled with propellant, in which a hot gas is generated after igniting and burning of the propellant, a fluid chamber containing a fluid, a mixing chamber in which fluid and hot gas are mixed in a mixture ratio, and at least one control device which controls the mixture ratio of fluid and hot gas in the mixing chamber.

Abstract: An inflator, more particularly for a vehicle occupant restraint system, has a tubular inflator housing which is closed off at its end faces and has radial exit ports via which the gas is able to exit the inflator. The inflator housing has in its interior at least one combustion chamber packed with propellant, at least one ignition unit for igniting the propellant in the combustion chamber and at least one filter which is located upstream of the exit ports. A filter insert featuring an outer housing is provided, the outer housing having a plurality of housing parts which at least partly surround the filter disposed in the filter insert. The outer housing together with its housing parts is radially secured to the inflator housing without the provision of an axial stop.

Abstract: The invention relates to a gas generator, comprising a first gas-generating stage and at least one gas-generating stage arranged downstream of the first stage, and also comprising a device for detecting a pressure change in the gas generator, wherein the device for detecting the pressure change comprises a chamber divided by a movable part into two partial chambers which are gas-tight with respect to each other, the partial chambers having openings which are in flow connection with the first stage and each have different cross-sectional areas, so that the pressure change spreads at different speeds in the two partial chambers and brings about a movement of the movable part, and the movable part being connected with a movement meter, which due to the movement of the movable part generates an electrical impulse to activate the second stage.

Abstract: The present invention relates to an inflator for a safety device, in particular for a vehicle occupant restraint system, comprising a housing (1, 15; 22, 23), a combustion chamber formed in the housing and including a solid propellant (6) for generating hot gas, and a coolant (13) introduced into a predetermined flow path of the hot gas. The inflator in accordance with the invention is characterized in that the flow path of the hot gas passes through a nozzle (10) comprising a pitot zone (20) in which the hot gas emerging from the combustion chamber (21) has a high static pressure, and comprising a nozzle neck (19) in which the hot gas builds up a high dynamic pressure, and in that the coolant (13) is arranged in a sleeve-shaped reservoir (11) extending from the pitot zone (20) at least in part into the nozzle neck (19). The inflator in accordance with the invention permits an effective reduction in the exhaust gas temperature of the generated hot gas.

Abstract: A hybrid gas generator, in particular for vehicle occupant restraint systems, has at least one combustion chamber containing propellant and at least one igniter for igniting the propellant. The igniter comprises an igniting material and is spaced from the combustion chamber and from the propellant. The gas generator further has a pressure chamber filled with compressed gas, a common outflow opening for the compressed gas and hot gas generated on deflagration of the propellant, and a bursting disc closing the outflow opening and being able to be destroyed on activation of the gas generator. The igniter is arranged upstream of the bursting disc. The igniter and the bursting disc are arranged relative to each other in such a manner and are adapted to each other in their physical and chemical characteristics such that the destruction of the bursting disc is exclusively effected by a deflagration of the ignition material.

Abstract: A gas generator, in particular for vehicle occupant restraint systems, has a housing with chambers provided therein, of which at least one chamber is filled with gas and at least one chamber is filled with propellant the gas generator further has at least one igniter for igniting the propellant. The igniter cap is secured in a gas- and pressure-tight manner by welding to a closure part which closes an opening in the housing.

Abstract: A gas generator, in particular for vehicle passive restraint systems, is constructed without pyrotechnical components for gas production, gas release, or gas heating. The gas generator includes a compressed gas container having an opening that is releasably closed by a closure such as a burst diaphragm, and at least one electrical and/or magnetic device arranged to destroy or release the closure upon triggering. It is also possible to achieve gas heating without the use of pyrotechnical components by coupling electrical and/or magnetic energy from the electrical and/or magnetic device into the gas container and particularly into the gas contained therein.

Abstract: The invention concerns a tubular gas generator for the filling of an airbag in a retention system for occupants of motor vehicles, whereby two separate combustion chamber units have a common connector and each combustion chamber unit has an ignitor unit with respective filters.