EP3606894A1 - Dispositif générateur de gaz pour le gonflage d'un coussin gonflable de sécurité comprenant une charge secondaire pulvérulente permettant de réduire les risques d'explosion - Google Patents
Dispositif générateur de gaz pour le gonflage d'un coussin gonflable de sécurité comprenant une charge secondaire pulvérulente permettant de réduire les risques d'explosionInfo
- Publication number
- EP3606894A1 EP3606894A1 EP18718609.3A EP18718609A EP3606894A1 EP 3606894 A1 EP3606894 A1 EP 3606894A1 EP 18718609 A EP18718609 A EP 18718609A EP 3606894 A1 EP3606894 A1 EP 3606894A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- generating device
- gas generating
- composition
- mpa
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
- C06D5/06—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
- B60R21/2644—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
- B60R21/2644—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
- B60R2021/2648—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder comprising a plurality of combustion chambers or sub-chambers
Definitions
- Gas generating device for inflating an airbag comprising a secondary powdery charge to reduce the risk of explosion
- the invention relates to a gas generator device for inflating a safety element type inflatable airbag type airbag for the protection of an occupant of a motor vehicle.
- the invention relates more particularly to a gas generating device for inflating an airbag constituted by a first chamber containing a first pyrotechnic composition called primary charge and a second chamber containing a second composition called secondary charge, the first and second chambers communicating directly or indirectly with each other, the first composition being a solid propellant capable of controlling the second composition consisting of a mixture of at least one oxidizing charge and at least one reducing charge, the first chamber being formed in a first case resistant to the operating pressure of said first pyrotechnic composition, the second chamber being formed in a second case resistant to the operating pressure of said second composition, the first and second cases being located in an outer envelope, the second case being at one end a metal gate delimiting a volume communicating with the outside by at least one gas escape orifice formed in said outer casing.
- WO2008053097 discloses a gas generating device comprising a chamber, said primary chamber, for storage and combustion of a pyrotechnic compound said primary compound, said primary chamber having at least one orifice called expulsion orifice, another chamber, called secondary chamber, for storing and decomposing a so-called secondary compound compound, the primary and secondary compounds forming an explosive charge of the gas generator and being adapted so that the secondary compound can be decomposed by combustion products of the primary compound, said secondary chamber having, in operation, at least one opening, said opening inlet, through which the products of combustion of the primary compound can penetrate.
- a gas generator device for a security system comprising an explosive charge formed at least by a primary pyrotechnic compound, in a first chamber, initiated by at least one initiator provided with a load reinforcer and a secondary compound, in a second chamber, the decomposition of which is controlled by products of combustion of the primary compound, an interaction of the products of combustion of the primary compound and those of the secondary compound by oxidation-reduction reaction occurring in a low volume confined, the first chamber communicating with said second chamber provided at a first zone adjacent to said first chamber of peripheral evacuation ports and containing at a second zone said secondary compound on the one hand and an obstacle preventing means for the passage of gases on the other hand, said obstacle means being installed between said first and second zones and arranged to pass the gases in a central portion and prevent their passage through a peripheral portion with a sufficient transparency so that the interaction volume remains weakly confined.
- gas generator devices are also described in applications WO2008 / 050006 and WO2004 / 091981.
- the gas generating devices of the above-mentioned applications provide for the use as a primary compound preferably of a composite propellant or Lova type and as a secondary compound preferably ammonium nitrate and an additive based on guanidine in the form of powder or granules or pellets.
- the secondary compounds used in the form of powders have the disadvantage of having a physical form that changes over time, thus ensuring non-constant performance. They also require a large secondary chamber so that gas generators of the prior art using powdery secondary compounds are relatively bulky.
- the secondary compounds used in the form of pellets have the disadvantage of being sensitive to the different actions to which they are subjected.
- the pellets of secondary compounds tend to disintegrate under mechanical, thermal or physico-chemical actions such as moisture, thus rendering the secondary compound potentially explosive.
- the compounds in the form of pellets offer a reaction kinematic that is less satisfactory than the pulverulent compounds.
- the invention aims to remedy this problem by proposing a gas generating system that overcomes the disadvantages of prior art gas generating systems, in particular by limiting or even eliminating the risk of explosion, while ensuring reproducible and constant performance over time.
- the invention also aims to provide a gas generating system avoiding the formation of harmful dust during the production of combustion gases.
- the invention also aims to provide a recyclable gas generating system.
- the invention provides a gas generating device for inflating an airbag type airbag constituted by a first chamber containing a first pyrotechnic composition called primary charge and a second chamber containing a second composition called secondary charge, the first and second chambers directly or indirectly communicating with each other, the first composition being a solid propellant capable of controlling the second composition consisting of a mixture of at least one oxidizing charge and at least one reducing charge, the first chamber being formed in a first case resistant to the operating pressure of said first pyrotechnic composition a given operating pressure of said first pyrotechnic composition, the second chamber being formed in a second pressure-resistant case given lower operating e of said second composition, the first and second cases being connected located in an outer envelope, the second case having at one end a metal gate delimiting a volume communicating with the outside through at least one exhaust port of the gases formed in said outer shell, the gas generating device being remarkable in that said second composition is a powder mixture of at least two components, the first constituent being
- the secondary compound consisting of particles having on the one hand a particle size of at least 20 ⁇ and on the other hand an apparent density of between 0.7 and 1.1, has the effect of offering a stable reaction in the time and to require a smaller reaction space than the pulverulent secondary compounds of the prior art. It thus makes it possible to obtain a satisfactory reaction kinematics in an optimum space. The risks of explosion are further removed and the performance of the gas generating device made reproducible and constant over time.
- apparent density is understood to be the number, the mixture mass ratio (in gr) / volume occupied by this mass of mixture (in cm 3 ), without compression operation.
- the density is expressed in Kg / m is 1000 * d.
- a powder mixture is formed of particles having a particle size greater than or equal to 20 ⁇ and a bulk density of between 0.7 and 1.1, since at least 90% of the particles constituting the mixture have a particle size and a bulk density within the aforementioned ranges.
- the powder mixture is formed of particles having a particle size of between 20 and 100 ⁇ , preferably between 20 and 60 ⁇ , and preferably of 30 ⁇ .
- the mixture is a eutectic.
- the powder mixture is co-milled.
- the powder mixture is then characterized by a homogeneous appearance.
- the advantage of a co-milled pulverulent mixture, formed of particles having a particle size of at least 20 ⁇ and a bulk density of between 0.7 and 1.1, is the improvement of the stability over time. mixing space, and thus to ensure satisfactory reaction performance, stable and reproducible over time.
- a final co-grinding operation improves the promiscuity between the components, reduces the dispersion of the particle size of the mixture, the apparent density remaining between 0.7 and 1.1.
- Another embodiment consists of spraying a solution in the form of prills. aqueous components. These prills can be implemented shredded or not. Advantageously, they have an apparent density of between 0.7 and 1.1.
- the second composition is adjusted so that the gases resulting from the reaction of the first and second composition present at the output of the generator device an oxygen balance greater than -5%, advantageously between -5% and +1. %, and preferably between -3% and + 1%.
- the first case of the first chamber withstands an operating pressure greater than 5 MPa.
- the first case of the second chamber withstands an operating pressure of less than 15 MPa.
- the second case of the second chamber withstands an operating pressure greater than 3 MPa.
- the second case of the second chamber withstands an operating pressure of less than 30 MPa.
- the second chamber which is advantageously the main generatrix of the generator gas, has an operating pressure of less than 15 MPa (150 bar), preferably less than 10 MPa (100 bar), and advantageously less than 5 MPa (150 bar). MPa (50 bar).
- the volume of gas generated by the second chamber covers a range of 0.25 to more than 4 moles.
- the second composition consists of guanidine nitrate and ammonium nitrate.
- the second composition consists of guanidine nitrate and basic copper nitrate.
- the first case comprises at least one initiator activatable by an external control provided with a booster charge and a relay load.
- the primary charge is a propellant whose pressure of operating is less than 30 MPa and whose burning time is in a range from 0.015 to 2.5 seconds.
- the gate has one or more orifices defining a surface of greater transparency than that of the exhaust ports of the gases.
- the first chamber communicates with the second chamber via a nozzle defined to ensure sonic flow of the gases from the primary chamber to the secondary chamber.
- the nozzle and the grid are disposed at a distance from each other less than 40 millimeters.
- said first case has on the side of its outer end end the initiator activatable by an external control provided with a reinforcing charge and the side of its inner end a central nozzle, the second case, closed on the side of its external end end, having on the side of its inner end end the gate, said outer casing connecting the two cases with a positioning where their respective inner end faces are opposite one another and separated by an intermediate volume characterizing the volume communicating with the outside by at least one orifice.
- the first chamber communicates directly with the second chamber, the gate being positioned at the opposite end of the first chamber, the volume communicating with the outside being located downstream of the second chamber.
- the primary charge is a propellant, consisting of a binder and a charge which, unlike the pellets, in case of separation of the components, can not form an explosive mixture.
- FIG. 1 shows a gas generating device according to a first embodiment of the invention
- FIG. 2 represents a schematic view of the shape of a primary charge block used with the gas generating device
- FIG. 3 represents a gas generating device according to another exemplary embodiment of the invention
- FIG. 4 shows a gas generator device according to another embodiment of the invention.
- identical or similar elements of the different embodiments are identified by identical reference signs throughout the figures.
- the gas generating device shown is a generator device for inflating a passenger bag of 110 liters. It is constituted by a first chamber 1 containing a first pyrotechnic composition called primary charge and a second chamber 2 containing a second composition called secondary charge, possibly packaged in a cartridge. This secondary charge is able to be controlled by the first composition.
- the first chamber 1 is formed in a first case 1A resistant to the operating pressure of said first pyrotechnic composition.
- the second chamber 2 is formed in a second case 2A resistant to the operating pressure of said second composition.
- the first and second cases 1A, 2A are interconnected by an outer envelope 10A.
- the first case 1A has, on the side of its external end 11, an initiator 15 which can be activated by an external control provided with a load. reinforcer and, on the its internal end 12, a central nozzle.
- the nozzle makes it possible to control the combustion of the primary charge in the gas generating device. It is defined to ensure a sonic flow of gases from the primary chamber to the secondary chamber, by adjusting the ratio of the surface of the nozzle neck to the surface of the propellant (clamping). It is specific to each primary charge.
- the nozzle is provided with a divergent to direct the jet in the center of the secondary chamber.
- the second case 2A is closed on the side of its outer end end 13 while it has, on the side of its inner end end 14, a metal gate 16.
- the first and second chambers communicating with each other via an intermediate volume which defines a third chamber, communicating with the outside through orifices formed in the outer casing.
- the primary charge placed in the first chamber is a solid propellant
- the second composition placed in the second chamber consisting of a mixture of at least one oxidizing charge and at least one reducing charge.
- the gas gas generator for inflating the safety cushion must have a running time of a few milliseconds to several seconds.
- the primary filler is a double-base or composite propellant or a Lova-type ballistic powder.
- the propellant may be in the form of uninhibited blocks. In this case, in order to limit the effects of walls of the primary chamber, to increase the loading density and to increase the reaction surface, the propellant block has radial branches.
- the propellant block has an annular shape provided with fins as illustrated in FIG. 2. It may also be envisaged to use double base propellants (nitrocellulose / nitroglycerine, preferably without alkaline salts). glow) such as:
- propellant SD 1152 Energy 1000 cal / g; Vc 30mm / s, plateau effect at 20MPA, Gaseous yield 1, 0 / g, no residues - - Propellant SD1133 (Energy 800cal / g, Vc 10mm / s at 5.5 MPa, gaseous yield 1, 0 / g, no residues).
- the composite propellants polybutadiene binder implemented is composed of 88% ammonium perchlorate, 14% polybutadiene. (gaseous yield 1 1 / g, 0 residues but HCl to be fixed). Vc l, 7mm / s under 10 MPa.
- monolithic propellants It is preferred to use monolithic propellants.
- the advantage of choosing monolithic propellants whose combustion is controlled by a nozzle is to reduce the risk of malfunction of the primary charge. In case of separation of the components, the matrix retains its integrity, there is no risk of malfunction of the primary charge.
- the performance is also improved: the flow is indeed adjustable by the shape and can therefore approach a constant flow; it is also possible to choose a propellant whose temperature coefficient is zero (plateau effect) or less than 0.3; it is also possible to choose a propellant whose operating pressures are between 100 and 200 bar at any temperature; the combustion time of the primary chamber is also adjustable from a few ms to several seconds.
- the primary charges are "cold" energy materials, that is to say difficult to initiate.
- An igniter charged with 0.04g of Zirconium / Potassium Perchlorate and 0.090g of Boron / Potassium Nitrate is provided. It is also necessary to add a relay charge of approximately 0.5 g of a composition Bore / potassium nitrate or a composition of 36% of guanidine nitrate, 62% of copper oxide 62% and 2% additive.
- the secondary fillers are prepared so that on the one hand the mixture obtained is homogeneous with a density of 0.9 ⁇ 0.2, pourable for loading and not likely demixing, and that on the other hand the gases from the combustion of primary and secondary charges and leaving the generator, have an oxygen balance of between -5% and + 1%.
- Oxygen balance is meant the quantity by mass of oxygen supplied or consumed per 100 g of compound. Oxygen balance is zero when all the oxygen of the oxidant is consumed by the reducer.
- the secondary fillers are prepared by co-grinding components whose particle size has been previously adjusted, preferably by means of a ball mill.
- the co-grinding technology has the advantage of being easily adapted to continuous production for large series by the implementation of the so-called single or double screw system.
- the advantage of the co-grinding technique of the mixture is to allow to agglomerate the two components in a single form.
- the mixtures obtained are homogeneous, without "fine particles", since co-grinding as practiced agglomerates the particles of the components without breaking them up, thus the particle size is narrowed.
- a secondary charge consisting of particles (grains) having a constant particle size.
- constant particle size composition means a composition comprising at least 95% of the particles a section identical to ⁇ 10%.
- particles having a cross section of the order of 30 ⁇ to ⁇ 10% are sought.
- the nominal compositions of the secondary fillers are adjusted as a function of the primary charges in order firstly to obtain the oxygen balance of the specified explosive charge (between -5 and + 1%) and secondly to fix undesirable species.
- undesirable species such as hydrochloric acid in the case of composite propellants, the oxides of nitrogen.
- Other additives such as plasticizers can be added.
- all the operations are carried out under controlled humidity 25% ⁇ 5%. All equipment in contact with the pulverulent composition is pre-dried at 70 ° C for 12h ⁇ 2h.
- Example 1 (Riegel) The secondary charge is composed of 57% of ammonium nitrate and 43% of guanidine nitrate.
- the explosive charge being balanced the composition changes depending on the nature and mass of the primary compound and the selected oxygen balance (for example, NA: 84%, GuNi: 16%).
- the components are prepared as follows:
- the Ammonium Nitrate, NAEO quality (Supplier Great Parish), is obtained by spraying in a tower "priling" a 90% concentrated solution of Ammonium nitrate.
- This product is in dense grains 1mm in diameter, strong mechanical strength. Being porous, it is little affected by the crystallographic changes. Its density is about 0.7g / cm3. It will be milled alone (ball mill, speed 100 rpm for 15 minutes) to obtain a particle size advantageously of the order of 30 ⁇ .
- the guanidine nitrate (Degusa supplier) particle size 300 ⁇ is milled alone (ball mill speed of 100 rpm for 30 minutes) to bring its particle size advantageously of the order of 30 ⁇ .
- the mixture obtained has a bulk density of 0.76 g / cm 3 (22 g Riegel in 29 cm 3).
- the Riegel and its derivatives are classified 1.3b: "materials that slow down rather slowly with minimal effects of breath and projection".
- the innovative character lies in the way of elaboration of materials and their implementation: They are powdery and homogeneously distributed in the cartridge. These characteristics are not affected by operational aging.
- the apparent density of Riegel is 7.5, that of its constituents in the solid state 1, 44 and 1, 70; and in the powdery state they are variable but generally less than 7. The process stabilizes the shape of the mixture.
- the secondary charge is composed of 40% Nitroguanidine and 60% ammonium nitrate.
- Ammonium Nitrate NAEO quality (Supplier Great Parish) is obtained by spraying in a tower of "prilling" of a 90% concentrated solution of Ammonium nitrate .
- This product is in dense grains 1mm in diameter, strong mechanical strength. Being porous, it is little affected by the crystallographic changes. Its density is about 0.7g / cm3. It will be milled alone (speed of 100 rpm for 15 minutes) to obtain a particle size of the order of 30 ⁇ .
- Nitroguanidine particle size 125 ⁇ is milled 30 minutes to bring its particle size of the order of 30 ⁇ .
- Example 1 As in Example 1, once ammonium nitrate and nitroguanidine milled, the two compounds are introduced with balls into the mill jar to undergo the co-grinding operation. The jar is rotated horizontally for one minute at 100 rpm.
- the secondary charge is composed of 48.5% of basic nitrate of copper and 51.5% of guanidine nitrate.
- the two compounds are introduced with balls in the mill jar to undergo the co-grinding operation.
- the jar is rotated horizontally for one minute at 100 rpm.
- additives of the aerosil or boric acid type are provided in the composition in an amount of less than 2%, the latter are added and mixed with the two compounds having previously undergone the co-grinding step.
- the mixing operation is carried out in the mill without the addition of the balls.
- an oxidant for example potassium nitrate or sodium nitrate
- ammonium nitrate it is the subject of a possible preliminary grinding, then a co-grinding with ammonium nitrate before to be co-milled with the reducer.
- a co-grinding with ammonium nitrate before to be co-milled with the reducer.
- additives to the reducer for example potassium nitrate or sodium nitrate
- the latter undergoes a gravimetric homogenization step in the homogenization cartridge is carried out advantageously by impact, by causing a small mass to fall on a piston in contact with the powder. It can also be provided a vibration operation or vertical shocks. In the latter case, the cartridge is secured vertically to a cylinder that lifts it and lets it fall. In order to obtain a satisfactory homogenization, about 200 shocks are made in 2 minutes. This operation is not performed by compression.
- the loading operation of the secondary charge in the relevant cartridge is performed at a RH ⁇ 25%.
- the density of the powder charged in the secondary chamber is preferably 9 ⁇ 2 g / cm 3 . It depends on the nature of the components, their method of preparation and that of the mixture. Depending on the formulation and process selected, the density is reproducible. It is validated at loading, the mass of the mixture and the volume of the cartridge being fixed.
- the lidding of the grid is specific to each configuration. It is obtained either by a cap or by break primers on the secondary chamber. An ignition relay can be glued on the lid to facilitate opening.
- the composition Zirconium Copper Oxide is preferred in this case.
- the innovating character lies in the way of elaboration of the materials and their implementation: They are pulverulent and homogeneously distributed in the cartridge. These characteristics are not affected by operational aging. The process stabilizes the shape of the mixture.
- the combustion is not autonomous but controlled by the primary charge, the reaction is carried out under low pressure to ensure a secure gas generator device.
- the mass ratio primary charge / explosive charge is between 12 and 30% and preferably between 15 and 25%, the gases leaving the generator must have an oxygen balance between -5% and + 1%.
- Oxygen scale is understood to mean the quantity of Oxygen mass supplied or consumed per 100g of compound. Oxygen balance is zero when all oxygen in the oxidant is consumed by the reducer.
- the characteristics of the gas generator device 10 as well as the composition of the primary and secondary charges contained therein are listed in the table below.
- the pressure of the chambers (1) and (2) is high.
- the pressures in the first chamber (55 MPa) and in the chamber 2 (14 MPa) are relatively high. Operating times of approximately 30 ms remain relevant for automotive safety applications.
- the cartridge it has been advantageously defined a length to diameter ratio of between 0.5 and 2.2. to allow a regular and complete combustion of the secondary charge. It was also defined for the grid or the washer that it had to present an empty surface 1, 5 times the surface of the exhausts, that is to say 210 mm 2 to 315 mm 2 for a surface full of 542 mm 2 , the orifices of exhaust of the third chamber having an exhaust surface of 140 to 210 mm.
- gas generator devices with the three types of propellants tested (LOVA, SD1152 and SD1152 + SI) have equivalent performance.
- Example of a Gas Generator Device Loaded with the Mercury Composition The two tables below detail the characteristics of a gas generating device thus loaded as well as the pressures in the chambers of the device and the operating times obtained.
- the two tables below detail the characteristics of a gas generator device thus loaded as well as the pressures in the chambers of the device and the operating times obtained.
- the Riegel mixture was prepared by dissolving the components and evaporation by the prilling method. Beads 1 ⁇ 0.5 mm in diameter are obtained which are used as they are.
- the pressure value chosen for Butalite is in the range of 6-10 MPa, with a burning rate of 1.7mm.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1752845A FR3064569B1 (fr) | 2017-04-03 | 2017-04-03 | Dispositif generateur de gaz pour le gonflage d’un coussin gonflable de securite comprenant une charge secondaire pulverulente permettant de reduire les risques d’explosion. |
PCT/FR2018/050830 WO2018185426A1 (fr) | 2017-04-03 | 2018-04-03 | Dispositif générateur de gaz pour le gonflage d'un coussin gonflable de sécurité comprenant une charge secondaire pulvérulente permettant de réduire les risques d'explosion |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3606894A1 true EP3606894A1 (fr) | 2020-02-12 |
Family
ID=59811389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18718609.3A Withdrawn EP3606894A1 (fr) | 2017-04-03 | 2018-04-03 | Dispositif générateur de gaz pour le gonflage d'un coussin gonflable de sécurité comprenant une charge secondaire pulvérulente permettant de réduire les risques d'explosion |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3606894A1 (fr) |
CN (1) | CN110891924A (fr) |
FR (1) | FR3064569B1 (fr) |
WO (1) | WO2018185426A1 (fr) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1284893B1 (fr) * | 2000-05-24 | 2004-12-08 | Seva Technologies | Dispositif de mise en oeuvre d'un element, en particulier de securite, pour la protection de biens et/ou de personnes |
FR2853872B1 (fr) * | 2003-04-15 | 2006-01-13 | Seva Technologies | Dispositif de mise en oeuvre d'un element de securite pour la protection des biens et/ou des personnes |
FR2895070B1 (fr) * | 2005-12-15 | 2008-03-07 | Seva Technologies Soc Par Acti | Dispositif de generation de gaz pour systeme de securite |
FR2907893B1 (fr) * | 2006-10-26 | 2009-01-30 | Seva Technologies | Generateur de gaz a chambres primaire et secondaire. |
FR2907892B1 (fr) * | 2006-10-26 | 2009-01-30 | Seva Technologies | Generateur de gaz |
CN101205158B (zh) * | 2006-12-19 | 2012-06-20 | 比亚迪股份有限公司 | 一种安全带预紧器产气药及其制备方法和使用方法 |
FR2922006A1 (fr) * | 2007-10-03 | 2009-04-10 | Livbag Soc Par Actions Simplif | Generateur de gaz dont la chambre de diffusion est pourvue d'un conduit interne |
-
2017
- 2017-04-03 FR FR1752845A patent/FR3064569B1/fr not_active Expired - Fee Related
-
2018
- 2018-04-03 WO PCT/FR2018/050830 patent/WO2018185426A1/fr unknown
- 2018-04-03 CN CN201880029205.9A patent/CN110891924A/zh active Pending
- 2018-04-03 EP EP18718609.3A patent/EP3606894A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR3064569A1 (fr) | 2018-10-05 |
WO2018185426A1 (fr) | 2018-10-11 |
FR3064569B1 (fr) | 2019-04-05 |
CN110891924A (zh) | 2020-03-17 |
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