EP0404644B1 - Electropyrotechnic device for triggering the functioning of a gas generator - Google Patents

Electropyrotechnic device for triggering the functioning of a gas generator Download PDF

Info

Publication number
EP0404644B1
EP0404644B1 EP90401674A EP90401674A EP0404644B1 EP 0404644 B1 EP0404644 B1 EP 0404644B1 EP 90401674 A EP90401674 A EP 90401674A EP 90401674 A EP90401674 A EP 90401674A EP 0404644 B1 EP0404644 B1 EP 0404644B1
Authority
EP
European Patent Office
Prior art keywords
rear base
ferrule
efi
explosive
casing
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.)
Expired - Lifetime
Application number
EP90401674A
Other languages
German (de)
French (fr)
Other versions
EP0404644A1 (en
Inventor
Denis Beaufay
Jean Boucard
Jean Holtz
André Winaver
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thomson Brandt Armements SA
Original Assignee
Thomson Brandt Armements SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thomson Brandt Armements SA filed Critical Thomson Brandt Armements SA
Publication of EP0404644A1 publication Critical patent/EP0404644A1/en
Application granted granted Critical
Publication of EP0404644B1 publication Critical patent/EP0404644B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/12—Bridge initiators

Definitions

  • the invention relates to an electropyrotechnic device intended to trigger the operation of a gas generator.
  • One of the applications of these devices is, for example, in the field of ejecting air-ground submunitions from a cargo ship using the use of gases formed by powder generators. Difficulties appear when the number of gas generators increases, in particular with regard to reliability, since the precautions necessary to ensure an acceptable reliability rate then become very costly in cost and in place.
  • TBI being the English initials of Through-Bulkead explosion Initiation, these devices comprising an upstream cavity containing a donor explosive which generates, under the effect of a detonation, a shock wave, which shock wave crosses a wall or tight barrier to initiate a receiving explosive contained in a downstream chamber.
  • the subject of the present invention is an electropyrotechnic device as described in claims 1 to 8.
  • an electropyrotechnic device (E) essentially consists, for its ignition part, of a primer with a projected layer (1), better known under the English terminology of "EFI” ( Exploding Foil Initiator).
  • EFI Exploding Foil Initiator
  • This generates a detonation in an upstream cavity (Ca) which contains a secondary donor explosive (2).
  • a secondary donor explosive (2) When the latter detonates, it generates a shock wave which propagates through a tight barrier (3) towards a downstream chamber (Ch) containing a secondary receiving explosive (4), capable of detonating to cause flames which, in turn , cause combustion of the powder charge (P) of the gas generator (g) concerned.
  • the igniter of the gas generator is thus ensured, in accordance with the invention, by means of the combination of an EFI and an IFOC (igniter operating by shock wave).
  • Such a combination has the advantage of avoiding the installation in the pyrotechnic chain, as is the case in the known art, of safety means between conventional igniters and pyrotechnic charges. In addition, this avoids the introduction of electrical means inside the gas generators.
  • the device described consists of an igniter as described above, capable of ensuring the correct start of combustion, of a double-base propellant charge having a profile and combustion characteristics such that the pressure is maintained at an almost constant value throughout the duration of the combustion.
  • a closing pallet (22) is put in place to close the IFOC chamber (ch).
  • the powder loading (P) is carried out inside a ferrule (10) whose front bottom (15) is hemispherical and whose rear bottom (16) which carries the nozzles (12, 13), is made integral with the shell (10) by means, for example, of a screw thread (14).
  • This rear bottom (16) has the shape of a converging truncated cone, the nozzles (12) and 13 opening into the side wall of this truncated cone.
  • the nozzles are two in number, diametrically opposite, but this number is not limiting.
  • the closing element (21) of the rear bottom (16) has at the top of the truncated cone two bores arranged head to tail, one delimits the volume of the downstream chamber (Ch) containing the secondary receiving explosive (4), the other the volume of the cavity (Ca) containing the secondary donor explosive (2); a zone of the closing element (21) constitutes the tight barrier (3) of the IFOC, a barrier capable of allowing the propagation of the shock wave while having qualities of sufficient mechanical resistance.
  • the rear bottom (16) is capped with a waterproof metallized plastic casing (17) whose bottom (18) is also in the form of a truncated cone, complementary to the convergent truncated cone defined above.
  • the two ends of these two trunks of cones fit into each other, trapping the cavity (Ca) containing the secondary donor explosive (2).
  • the cover (30) of this housing (17) maintains in position the EFI (1) placed on the top of the truncated cone of the housing (17).
  • the latter contains the control electronics (not shown) which is supplied through its wall, via filters (31) and sealed crossing means (37), by means of an electrical connection (32) itself connected to a sequencer not shown.
  • This housing (17) is placed on a cushion (33) acting as a shock absorber while a set of seals (34) seals at all levels.
  • the housing is made for example of metallized plastic and constitutes an ideal housing for the electronic control of the EFl (1).
  • FIG 3 illustrates another embodiment of the combination (EFI-IFOC) integrated in the rear bottom (16) nozzle holders.
  • EFI-IFOC the combination
  • the propellant charge consists of seven powder loaves (P) whose combustion profile is star ( Figure 3). These powder loaves (double-base propellant) are held in place by two metal grids (50) provided with clamping claws (55) and spacing elements (56).
  • the electronic control means are compacted as much as possible inside a box itself located inside the general structure of the gas generator.
  • the invention applies each time a battery of generators is used, as is the case in the field of ejecting air-to-ground submunitions from a cargo ship.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Description

L'invention concerne un dispositif électropyrotechnique destiné à déclencher le fonctionnement d'un générateur de gaz.The invention relates to an electropyrotechnic device intended to trigger the operation of a gas generator.

Une des applications de ces dispositifs se trouve par exemple dans le domaine de l'éjection des sous-munitions air-sol à partir d'un cargo faisant appel à l'utilisation de gaz formés par des générateurs à poudre. Des difficultés apparaissent lorsque le nombre de générateurs de gaz s'accroît, notamment au niveau de la fiabilité, car les précautions nécessaires pour assurer un taux de fiabilité acceptable deviennent alors très coûteuses en coût et en place.One of the applications of these devices is, for example, in the field of ejecting air-ground submunitions from a cargo ship using the use of gases formed by powder generators. Difficulties appear when the number of gas generators increases, in particular with regard to reliability, since the precautions necessary to ensure an acceptable reliability rate then become very costly in cost and in place.

Ces deux exigences, augmentation de la fiabilité et diminution de l'encombrement et du poids, ont conduit la Demanderesse, et c'est le but de l'invention, à agencer une combinaison optimisée de moyens.These two requirements, increased reliability and reduced overall dimensions and weight, have led the Applicant, and this is the aim of the invention, to arrange an optimized combination of means.

Il est connu, d'après le document US-A-3.945.322, des dispositifs TBI, TBI étant les initiales anglo-saxonnes de Through-Bulkead explosion Initiation, ces dispositifs comprenant une cavité amont contenant un explosif donneur qui engendre, sous l'effet d'une détonation, une onde de choc, laquelle onde de choc traverse une paroi ou barrière étanche pour venir initier un explosif receveur contenu dans une chambre aval.It is known, from document US-A-3,945,322, of TBI devices, TBI being the English initials of Through-Bulkead explosion Initiation, these devices comprising an upstream cavity containing a donor explosive which generates, under the effect of a detonation, a shock wave, which shock wave crosses a wall or tight barrier to initiate a receiving explosive contained in a downstream chamber.

La présente invention a pour objet un dispositif électropyrotechnique tel que décrit dans les revendications 1 à 8.The subject of the present invention is an electropyrotechnic device as described in claims 1 to 8.

L'invention sera mieux comprise à l'aide des explications qui vont suivre et des figures jointes parmi lesquelles :

  • les figures 1 et 2 sont des coupes selon deux plans orthogonaux d'un dispositif selon l'invention ;
  • la figure 3 est un autre exemple de mise en oeuvre d'une combinaison électropyrotechnique conforme à l'invention ;
  • la figure 4 est un exemple illustrant le profil d'un pain de poudre servant au chargement des générateurs de gaz équipés d'une combinaison électropyrotechnique selon l'invention ;
  • la figure 5 est une illustration d'une grille servant au chargement des générateurs de gaz.
The invention will be better understood with the aid of the explanations which follow and of the appended figures among which:
  • Figures 1 and 2 are sections along two orthogonal planes of a device according to the invention;
  • Figure 3 is another example of implementation of an electropyrotechnic combination according to the invention;
  • FIG. 4 is an example illustrating the profile of a powder cake used for loading gas generators equipped with an electropyrotechnic combination according to the invention;
  • Figure 5 is an illustration of a grid used for loading gas generators.

Pour plus de clarté, les mêmes éléments portent les mêmes références dans toutes les figures.For the sake of clarity, the same elements are given the same references in all the figures.

Comme le montrent les figures 1 et 2, un dispositif électropyrotechnique (E) selon l'invention est essentiellement constitué, pour sa partie allumage, d'une amorce à couche projetée (1), plus connue sous la terminologie anglosaxonne de "EFI" (Exploding Foil Initiator).Celui-ci engendre une détonation dans une cavité amont (Ca) qui contient un explosif secondaire donneur (2). Quand ce dernier détone, il engendre une onde de choc qui se propage à travers une barrière étanche (3) vers une chambre aval (Ch) contenant un explosif secondaire récepteur (4), capable en détonant de provoquer des flammes qui, à leur tour, provoquent la combustion du chargement de poudre (P) du générateur de gaz (g) concerné. L'allumeur du générateur de gaz est ainsi assuré, conformément à l'invention, au moyen de la combinaison d'un EFI et d'un IFOC (Inflammateur fonctionnant par onde de choc).As shown in FIGS. 1 and 2, an electropyrotechnic device (E) according to the invention essentially consists, for its ignition part, of a primer with a projected layer (1), better known under the English terminology of "EFI" ( Exploding Foil Initiator). This generates a detonation in an upstream cavity (Ca) which contains a secondary donor explosive (2). When the latter detonates, it generates a shock wave which propagates through a tight barrier (3) towards a downstream chamber (Ch) containing a secondary receiving explosive (4), capable of detonating to cause flames which, in turn , cause combustion of the powder charge (P) of the gas generator (g) concerned. The igniter of the gas generator is thus ensured, in accordance with the invention, by means of the combination of an EFI and an IFOC (igniter operating by shock wave).

Une telle combinaison présente l'avantage d'éviter la mise en place dans la chaîne pyrotechnique, comme c'est le cas dans l'art connu, de moyens de sécurité entre les inflammateurs classiques et les charges pyrotechniques. En outre, on évite ainsi l'introduction de moyens électriques à l'intérieur des générateurs de gaz.Such a combination has the advantage of avoiding the installation in the pyrotechnic chain, as is the case in the known art, of safety means between conventional igniters and pyrotechnic charges. In addition, this avoids the introduction of electrical means inside the gas generators.

La mise en oeuvre d'un tel dispositif électropyrotechnique (E) selon l'invention est, selon une autre caractéristique de l'invention, intégrable au moins partiellement dans la structure même du générateur de gaz (g). Il en résulte un produit fini compact et sûr.The implementation of such an electropyrotechnic device (E) according to the invention is, according to another characteristic of the invention, at least partially integrated into the structure of the gas generator (g). The result is a compact and safe finished product.

Selon une autre caractéristique de l'invention, le dispositif décrit est constitué d'un allumeur tel que décrit ci-dessus, capable d'assurer le démarrage correct de la combustion, d'un chargement de propergol à double base ayant un profil et des caractéristiques de combustion tels que la pression se maintienne à une valeur quasi-constante durant toute la durée de la combustion. Un pallet (22) de fermeture est mis en place pour fermer la chambre (ch) de l'IFOC.According to another characteristic of the invention, the device described consists of an igniter as described above, capable of ensuring the correct start of combustion, of a double-base propellant charge having a profile and combustion characteristics such that the pressure is maintained at an almost constant value throughout the duration of the combustion. A closing pallet (22) is put in place to close the IFOC chamber (ch).

Selon un exemple de réalisation et comme cela est illustré au moyen des figures 1 et 2, le chargement de poudre (P) est réalisé à l'intérieur d'une virole (10) dont le fond avant (15) est hémisphérique et dont le fond arrière (16) qui porte les tuyères (12, 13), est rendu solidaire de la virole (10) au moyen par exemple d'un pas de vis (14). Ce fond arrière (16) a la forme d'un tronc de cône convergent, les tuyères (12) et 13 débouchant dans la paroi latérale de ce tronc de cône. Dans l'exemple décrit, les tuyères sont au nombre de deux, diamétralement opposées, mais ce nombre n'est pas limitatif.According to an exemplary embodiment and as illustrated by means of FIGS. 1 and 2, the powder loading (P) is carried out inside a ferrule (10) whose front bottom (15) is hemispherical and whose rear bottom (16) which carries the nozzles (12, 13), is made integral with the shell (10) by means, for example, of a screw thread (14). This rear bottom (16) has the shape of a converging truncated cone, the nozzles (12) and 13 opening into the side wall of this truncated cone. In the example described, the nozzles are two in number, diametrically opposite, but this number is not limiting.

L'élément de fermeture (21) du fond arrière (16) présente au niveau du sommet du tronc de cône deux alésages disposés tête-bêche, l'un délimite le volume de la chambre aval (Ch) contenant l'explosif secondaire récepteur (4), l'autre le volume de la cavité (Ca) contenant l'explosif secondaire donneur (2); une zone de l'élément de fermeture (21) constitue la barrière étanche (3) de l'IFOC, barrière capable de permettre la propagation de l'onde de choc tout en présentant des qualités de résistance mécanique suffisante.The closing element (21) of the rear bottom (16) has at the top of the truncated cone two bores arranged head to tail, one delimits the volume of the downstream chamber (Ch) containing the secondary receiving explosive (4), the other the volume of the cavity (Ca) containing the secondary donor explosive (2); a zone of the closing element (21) constitutes the tight barrier (3) of the IFOC, a barrier capable of allowing the propagation of the shock wave while having qualities of sufficient mechanical resistance.

Le fond arrière (16) est coiffé d'un boîtier en matière plastique métallisée étanche (17) dont le fond (18) est lui aussi en forme de tronc de cône, complémentaire du tronc de cône convergent défini précédemment.The rear bottom (16) is capped with a waterproof metallized plastic casing (17) whose bottom (18) is also in the form of a truncated cone, complementary to the convergent truncated cone defined above.

Les deux extrémités de ces deux troncs de cônes s'emboîtent l'une dans l'autre, emprisonnant la cavité (Ca) contenant l'explosif secondaire donneur (2). Le couvercle (30) de ce boîtier (17) maintient en position l'EFI (1) posé sur le sommet du tronc de cône du boîtier (17). Ce dernier contient l'électronique de commande (non représentée) qui est alimentée à travers sa paroi, via des filtres (31) et des moyens de traversée étanche (37), au moyen d'une liaison électrique (32) elle-même reliée à un séquenceur non représenté. Ce boîtier (17) est posé sur un coussin (33) jouant le rôle d'amortisseur tandis qu'un jeu de joints (34) assure l'étanchéité à tous les niveaux. Le boîtier est réalisé par exemple en matière plastique métallisée et constitue un logement idéal pour l'électronique de commande de l'EFl (1).The two ends of these two trunks of cones fit into each other, trapping the cavity (Ca) containing the secondary donor explosive (2). The cover (30) of this housing (17) maintains in position the EFI (1) placed on the top of the truncated cone of the housing (17). The latter contains the control electronics (not shown) which is supplied through its wall, via filters (31) and sealed crossing means (37), by means of an electrical connection (32) itself connected to a sequencer not shown. This housing (17) is placed on a cushion (33) acting as a shock absorber while a set of seals (34) seals at all levels. The housing is made for example of metallized plastic and constitutes an ideal housing for the electronic control of the EFl (1).

Le tout est fermé par un capot (35) rendu solidaire du fond arrière (16) par tous moyens connus tels qu'un système de vis (40). On a représenté sur ces figures un seul générateur mais, comme cela a été dit précédemment, l'invention s'applique plus particulièrement lorsque ces générateurs sont regroupés en batterie.The whole is closed by a cover (35) made integral with the rear bottom (16) by any known means such as a screw system (40). There is shown in these figures a single generator but, as has been said previously, the invention applies more particularly when these generators are grouped in battery.

La figure 3 illustre un autre exemple de réalisation de la combinaison (EFI-IFOC) intégré dans le fond arrière (16) porte-tuyères. On y retrouve comme précédemment les deux alésages délimitant la cavité amont (Ca), la chambre aval (Ch) et la barrière étanche (3), mais dans cette forme de réalisation, l'EFI (1) est directement rendu solidaire du fond arrière (16) porte-tuyères, au moyen par exemple d'un filetage (60). Une telle architecture contribue à rendre l'ensemble encore plus compact.Figure 3 illustrates another embodiment of the combination (EFI-IFOC) integrated in the rear bottom (16) nozzle holders. We find there as before the two bores delimiting the upstream cavity (Ca), the downstream chamber (Ch) and the waterproof barrier (3), but in this embodiment, the EFI (1) is directly secured to the rear bottom (16) nozzle holders, for example by means of a thread (60). Such an architecture contributes to making the whole even more compact.

Comme le montrent la figure 4 et la figure 5, le chargement de propergol est constitué de sept pains de poudre (P) dont le profil de combustion est en étoile (figure 3). Ces pains de poudre (propergol à double base) sont maintenus à l'aide de deux grilles métalliques (50) munies de griffes de coincement (55) et d'éléments d'écartement (56).As shown in Figure 4 and Figure 5, the propellant charge consists of seven powder loaves (P) whose combustion profile is star (Figure 3). These powder loaves (double-base propellant) are held in place by two metal grids (50) provided with clamping claws (55) and spacing elements (56).

Comme cela a déjà été dit précédemment dans une architecture telle que décrite conformément à l'invention, on assure un allumage du propergol, dont la combustion se fait à pression constante, sans devoir introduire de moyens électriques à l'intérieur de la charge. L'allumage nécessite la mise en oeuvre uniquement d'explosifs secondaires, ce qui contribue à la fiabilité du dispositif. Le fait de faire appel à la combinaison d'un EFI et d'un IFOC permet en outre d'intégrer ces moyens ainsi que les moyens de commande électronique de l'EFI (1) à l'intérieur de la structure générale du générateur de gaz (g) et ceci sans risque de passage de gaz étant donné l'existence du capot (35) d'une part et de l'élément de fermeture (21) d'autre part, élément qui assure une seconde fonction, à savoir celle de propager l'onde de choc au niveau de la barrière étanche (3) de l'IFOC.As has already been said previously in an architecture as described in accordance with the invention, ignition of the propellant is ensured, combustion takes place at constant pressure, without having to introduce electrical means inside the charge. Ignition requires the use of secondary explosives only, which contributes to the reliability of the device. The fact of using the combination of an EFI and an IFOC further makes it possible to integrate these means as well as the electronic control means of the EFI (1) within the general structure of the generator. gas (g) and this without risk of gas passage given the existence of the cover (35) on the one hand and the closing element (21) on the other hand, element which performs a second function, namely that of propagating the shock wave at the level of the waterproof barrier (3) of the IFOC.

Les moyens de commande électronique sont compactés au maximum à l'intérieur d'un boîtier lui-même situé à l'intérieur de la structure générale du générateur de gaz.The electronic control means are compacted as much as possible inside a box itself located inside the general structure of the gas generator.

L'invention s'applique chaque fois qu'une batterie de générateurs est mise en oeuvre, comme c'est le cas dans le domaine de l'éjection des sous-munitions air-sol à partir d'un cargo.The invention applies each time a battery of generators is used, as is the case in the field of ejecting air-to-ground submunitions from a cargo ship.

Claims (8)

  1. Electropyrotechnic device intended to trigger the operation of a powder generator (P) the device being of the type comprising an upstream cavity (Ca) containing a donor explosive (2) which generates, under the effect of a detonation, a shock wave, which shock wave passes through a leaktight barrier (3) in order to initiate a receiver explosive (4) contained in a downstream chamber (Ch), the said device being characterised in that it comprises an exploding foil initiator (1) (EFI) generating, when it is initiated, a detonation in the upstream cavity (Ca) and positioned opposite the upstream cavity (Ca), in that the donor explosive (2) is a secondary explosive and the receiver explosive (4) is a secondary explosive called a shock-wave igniter, capable, by detonating under the action of the shock wave, of causing flames leading to the triggering of the powder generator (P), and in that, the generator being placed inside a ferrule (10) having a front base (15) and a rear base (16),
    - the downstream chamber (Ch) is made in a first bore of a closure element (21) of the rear base (16) of the ferrule which has the shape of a truncated cone, pipes (12, 13) emerging in the lateral wall of the rear base (16);
    - the upstream cavity (Ca) is made in a second bore arranged head-to-tail with respect to the first bore and separated from the latter by a leaktight barrier, this barrier consisting of a zone of the closure element (21) of the rear base (16) of the ferrule (10);
    - a casing (17), having a base (18) in the shape of a truncated cone complementary with the truncated cone of the rear base (16) of the ferrule (10), covers this rear base (16).
  2. Device according to Claim 1, characterised in that the casing (17) has a lid (30) which holds the EFI (1) arranged between this lid and the vertex of the truncated cone of the casing (17).
  3. Device according to Claim 1, characterised in that the EFI is made integral with the vertex of the rear base (16) of the ferrule (10).
  4. Device according to Claim 1, characterised in that control electronics for the EFI (1) are contained inside the casing (17).
  5. Device according to Claim 1, characterised in that a hood (35) covers the assembly constituted by the casing (17), the EFI (1), the shock-wave igniter, the ferrule (10) and the rear base (16).
  6. Device according to Claim 1, characterised in that the ferrule (10) is loaded using a plurality of double-based powder cakes (P) whose star-shaped profile and composition ensure quasi-constant pressure during the combustion time.
  7. Device according to Claim 6, characterised in that the powder cakes (P) are held by a pair of metal grids (50).
  8. Device according to Claim 1, characterised in that at least two diametrically opposite pipes emerge in the lateral wall of the rear base (16).
EP90401674A 1989-06-20 1990-06-15 Electropyrotechnic device for triggering the functioning of a gas generator Expired - Lifetime EP0404644B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8908183A FR2648554B1 (en) 1989-06-20 1989-06-20 SYSTEM IMPLEMENTING AN ELECTROPYROTECHNICAL DEVICE FOR SEQUENTIALLY TRIGGERING THE OPERATION OF A GAS GENERATOR BATTERY
FR8908183 1989-06-20

Publications (2)

Publication Number Publication Date
EP0404644A1 EP0404644A1 (en) 1990-12-27
EP0404644B1 true EP0404644B1 (en) 1993-06-23

Family

ID=9382932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401674A Expired - Lifetime EP0404644B1 (en) 1989-06-20 1990-06-15 Electropyrotechnic device for triggering the functioning of a gas generator

Country Status (5)

Country Link
US (1) US5092237A (en)
EP (1) EP0404644B1 (en)
CA (1) CA2019304A1 (en)
DE (1) DE69002040D1 (en)
FR (1) FR2648554B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5348344A (en) * 1991-09-18 1994-09-20 Trw Vehicle Safety Systems Inc. Apparatus for inflating a vehicle occupant restraint using a mixture of gases
USRE37843E1 (en) 1991-09-18 2002-09-17 Trw Vehicle Safety Systems Inc. Apparatus for inflating a vehicle occupant restraint using a mixture of gases
US5969286A (en) * 1996-11-29 1999-10-19 Electronics Development Corporation Low impedence slapper detonator and feed-through assembly
US6607214B2 (en) * 2001-08-17 2003-08-19 Autoliv Asp, Inc. Gas generation via indirect ignition
US7380820B2 (en) * 2005-06-23 2008-06-03 Trw Vehicle Safety Systems Inc. Heated gas inflator

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1194102A (en) * 1959-11-06
US2703960A (en) * 1953-08-31 1955-03-15 Phillips Petroleum Co Rocket
DE1016171B (en) * 1954-01-06 1957-09-19 Ici Ltd Motor gas generating charge
DE1167120B (en) * 1960-08-10 1964-04-02 Boelkow Entwicklungen Kg Solid rocket engine, the propellant body of which is designed as an internal star burner
DE1271582B (en) * 1964-02-21 1968-06-27 Dynamit Nobel Ag Ignition cartridge, especially for igniting the fuel-air mixture for the drive engine of a torpedo
US3678853A (en) * 1970-06-12 1972-07-25 Us Navy Quick disconnect explosive connector assembly
US3770387A (en) * 1971-04-09 1973-11-06 Allied Chem Deflector
US3945322A (en) * 1974-04-05 1976-03-23 The United States Of America As Represented By The Secretary Of The Navy Through-bulkhead explosion initiation
US3982488A (en) * 1975-02-19 1976-09-28 The United States Of America As Represented By The Secretary Of The Army Flueric through bulkhead rocket motor ignitor
US4144814A (en) * 1976-07-08 1979-03-20 Systems, Science And Software Delay detonator device
FR2470757A1 (en) * 1979-12-07 1981-06-12 Aerospatiale PYROTECHNIC CONNECTION WITH SEALED AND SELF-RELEASABLE PARTS
EP0040011B1 (en) * 1980-05-09 1984-08-08 EMI Limited Arrangements for igniting a pyrotechnic charge
US4602565A (en) * 1983-09-26 1986-07-29 Reynolds Industries Inc. Exploding foil detonator
FR2591735B1 (en) * 1985-12-17 1989-09-15 Thomson Brandt Armements PYROTECHNIC GAS GENERATOR AND USE IN A DEVICE EJECTING UNMUNITION OF A MILITARY LOAD
US4944225A (en) * 1988-03-31 1990-07-31 Halliburton Logging Services Inc. Method and apparatus for firing exploding foil initiators over long firing lines

Also Published As

Publication number Publication date
CA2019304A1 (en) 1990-12-20
EP0404644A1 (en) 1990-12-27
FR2648554A1 (en) 1990-12-21
FR2648554B1 (en) 1994-03-25
DE69002040D1 (en) 1993-07-29
US5092237A (en) 1992-03-03

Similar Documents

Publication Publication Date Title
EP1022536B1 (en) Hybrid gas generator with hollow charge initiator
EP0757026B1 (en) Pyrotechnic hot gas generator for airbag used for side impact protection
EP0870746B1 (en) Process for assuring the progressive deployment of an airbag and pyrotechnic charge for use in such a process
FR2740545A1 (en) PYROTECHNIC GAS GENERATOR, VARIABLE FLOW RATE, FOR PROTECTIVE CUSHIONS
EP0864470A1 (en) Pyrotechnic gas generator with adaptable flow and volume for a safety bag
EP0870651B1 (en) Pyrotechnic gas generator with adaptive flow and volume for air bag
EP0901946B1 (en) Adaptable pyrotechnic gasgenerator for a safety bag with neutralisation device
EP0404644B1 (en) Electropyrotechnic device for triggering the functioning of a gas generator
EP0545764B1 (en) Locking device for a casing containing pyrotechnical material
EP0499500B1 (en) Container provided with electrical connection means
CA2404836C (en) Hybrid gas generator for automotive lateral air-bag restraint system
FR2679994A1 (en) Device for igniting the propulsive charge of a munition, especially a telescoped munition, and munition initiated by such an igniting device
FR2855769A1 (en) Gas generator for motor vehicles air bag, has two combustion chambers, each with igniter to ignite gas production agent, and third combustion chamber where sequence of activation of igniters can be adjusted
EP3163249B1 (en) Igniter for propellant
EP1034411B1 (en) Pyro-acoustic generator for protecting submarines and surface ships
FR2728675A1 (en) CARTRIDGE WITH SOCKET AND ARROW PROJECTILE
EP1577635B1 (en) Ignition system for two explosive charges and warhead which uses such an ignition system
EP1530020B1 (en) Ignition device of at least two pyrotechnical compositions or propulsive charges of a projectile
EP2029956B1 (en) Safety initiator for pyrotechnic device
FR2552871A1 (en) Anti-tank projectile acting at the deviation speed
FR2907732A1 (en) Gas generator for an automobile airbag comprises supplementary outlets whose caps are blown when the gas generated by a pyrotechnic charge increases the pressure in a pressurized gas reservoir
FR2776372A1 (en) PERFORATING SHELL ANTI CONCRETE STRUCTURES AND CONVERSION DEVICE FOR OBTAINING SUCH A PERFORATING SHELL FROM AN EXPLOSIVE SHELL
FR2529318A1 (en) Smoke shell with disperser - with container having circumferential groove for rupturing upon firing explosive charge.
EP0678725A1 (en) Ignition device for propellant charge
EP0402268A1 (en) Pyrotechnic igniter for military charges or a reactor or a gas generator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE ES GB IT SE

17P Request for examination filed

Effective date: 19910318

17Q First examination report despatched

Effective date: 19920310

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE ES GB IT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19930623

Ref country code: DE

Effective date: 19930623

Ref country code: SE

Effective date: 19930623

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19930623

REF Corresponds to:

Ref document number: 69002040

Country of ref document: DE

Date of ref document: 19930729

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930819

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19940630

BERE Be: lapsed

Owner name: THOMSON-BRANDT ARMEMENTS

Effective date: 19940630

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010524

Year of fee payment: 12

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020615

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020615