EP0310160B1 - Anti-vehicle grenade - Google Patents

Anti-vehicle grenade Download PDF

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Publication number
EP0310160B1
EP0310160B1 EP88201961A EP88201961A EP0310160B1 EP 0310160 B1 EP0310160 B1 EP 0310160B1 EP 88201961 A EP88201961 A EP 88201961A EP 88201961 A EP88201961 A EP 88201961A EP 0310160 B1 EP0310160 B1 EP 0310160B1
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EP
European Patent Office
Prior art keywords
washer
grooves
grenade according
detonator
passages
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Expired - Lifetime
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EP88201961A
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German (de)
French (fr)
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EP0310160A1 (en
Inventor
André Gabriels
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Cessione fabrique Nationale Nouvelle Herstal
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FN Herstal SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0838—Primers or igniters for the initiation or the explosive charge in a warhead
    • F42C19/0846—Arrangements of a multiplicity of primers or detonators, dispersed within a warhead, for increased efficiency

Definitions

  • the invention relates to an anti-vehicle grenade comprising a head, a tubular tail extending the head, the head being traversed by an axial bore opening into an axial bore of said tubular tail, a hollow charge located in the head symmetrically around the axial bore and a detonator.
  • Such a grenade corresponding to the preamble of claim 1 is known from EP-A-0 030 051 which relates to the use of a particular bullet pass in one of the above bores.
  • the object of the present invention is therefore to produce a hollow charge grenade intended to be launched using a rifle and allowing symmetrical ignition of the hollow charge from an eccentric percussion point.
  • the detonator arranged asymmetrically with respect to the axis AA of the grenade, and the hollow charge of the grenade are mounted means making it possible to obtain an ignition symmetrical with respect to the axis of said hollow, these means comprising means for transferring the shock wave caused by the detonator, these means defining ways of conducting this wave between a point adjacent to the detonator and several ignition points arranged symmetrically around the axis longitudinal of the grenade, these routes having dimensions such between the initial point and each of the ignition points, that the waves take the same time to arrive from the initial point to the ignition points.
  • shock wave transfer means is known per se from US-A-3,311,055 and US-A-3,561,361, but these two patents do not concern a grenade but detonation systems.
  • US-A-3,311,055 relates in fact to a secondary detonator (booster) for the detonation of a charge cone.
  • Lengths of explosive surrounded by metal are placed in concentric grooves in the wall of a chamber in which the annular detonation charge is located.
  • lengths of explosive connect an initiation point to T-shaped connections putting a length in communication with two lengths in an adjacent groove, each of these latter lengths being in communication by T-shaped connections with two other lengths in another groove.
  • US-A-3,561,361 describes a cylindrical detonator mounted symmetrically on a shaped charge which is not really hollow. Explosive-filled channels connect directly or through a central round chamber an initiation point to the chamber composed of two elements, so that the detonation of the external element is prior to the detonation of the internal element of the load.
  • the detonator is part of a safety device placed in the head between the shaped charge and the tail.
  • the means for transferring the shock wave comprise at least one washer disposed between the detonator and the shaped charge transversely to the longitudinal axis, and comprising grooves filled with an explosive material forming the driving paths.
  • FIG. 1 represents a grenade according to the invention constituted essentially by a head 1 comprising a hollow charge 2, a safety device 3 comprising the detonator 4 and a device with percussion point 5, the grenade being traversed by an axial bore 6, extended by a second axial bore 7 provided in the tail 8 of the grenade.
  • the grenade comprises according to the invention, between the safety device 3, more particularly the detonator 4 and the hollow charge proper 2, a device 10 for the transfer of the wave of shock coming from the ignition of the detonator 4 towards the hollow charge 2, for example a washer 10.
  • a device 10 for the transfer of the wave of shock coming from the ignition of the detonator 4 towards the hollow charge for example a washer 10.
  • the transfer washer 10 is produced in such a way that it has four transfer points, respectively 11, 12, 13 and 14, arranged concentrically and at equal angles. relative to the longitudinal axis AA of the grenade.
  • the washer 10 has grooves filled with an explosive material 15.
  • a first groove 16 is produced on an arc of a circle of 180 degrees and the middle part 17 of which is located opposite the said percussion point and the detonator 4.
  • This groove 16 is at each free end extended by aligned grooves 18-19 directed towards each other.
  • Each groove 18-19 ends in a groove respectively 20-21 situated concentrically with respect to the groove 16 and extending over 90 degrees, more especially still over twice 45 degrees on either side of the grooves 18-19.
  • Each free end of these two grooves 20 and 21 is extended by radial grooves, respectively 22, 23, 24 and 25 directed towards the axis AA of the grenade, each of these grooves 22 to 25 being in relation to one of the holes 26 , 27, 28 and 29 constituting said transfer or ignition points 11 to 14.
  • said washer is in this case provided with a notch 30 capable of cooperating with an internally projecting part 31 of the body of the grenade. It goes without saying that the lengths of the constituent parts of the above-mentioned grooves must be perfectly identical and of equal length in order to obtain a symmetrical ignition ie an ignition of the shaped charge 2 at the same time in the four points 11 to 14.
  • the washer 10, more particularly the mutual distance of the grooves and the depth of these grooves relative to the thickness of the washer 10 are made in such a way. so that short circuits are avoided between on the one hand, the neighboring grooves 16, 20 and 21 and on the other hand, between the explosive material 15 and the shaped charge 2 at the locations of the grooves.
  • the shock wave thus produced is transferred to the material 15 contained in the groove 16 of the washer 10.
  • the shock wave thus moves both towards the grooves 18-19, then towards the grooves 20-21 and then towards the grooves 22 to 25 to reach, by the explosive material contained in the passages 26 to 29, the hollow charge 2, possibly via a conventional relay.
  • the ignition of the hollow charge 2 is thus carried out in a symmetrical manner, in particular at the same time in the four points 11 to 14 situated at equal angles to one another.
  • the washer 10 has been split by a second washer 32, produced in such a way that the shock waves coming from the four points 11 to 14 are transferred to explosive materials 33 engaged in circular grooves, respectively 34, 35, 36 and 37, provided in the washer 32.
  • Said grooves 34 to 37 are each, at each free end, extended by radial grooves, respectively 38-39, 40-41, 42-43 and 44-45, directed outwards.
  • the free ends of the grooves 38 to 45 are each in relation to holes 46 to 53 in order to thus obtain a multiplication of the ignition points 54 to 61. It goes without saying that a better symmetrical distribution of the points is thus obtained ignition relative to the shaped charge 2.
  • Said second washer also has a positioning groove 62.
  • the operation of the grenade equipped with washers 10 and 32 is similar to that described above.
  • the shock waves from points 11 to 14 are transferred to the explosive material 33 contained in the grooves 34 to 37.
  • the shock waves travel both to the grooves 38 to 45 and then to the explosive material contained. in passages 46 to 53 in order to be transferred at the same time, at eight points, to the shaped charge 2.
  • the dimensions of the different grooves are always determined in such a way that the waves of shock are transmitted simultaneously in the eight points 54 to 61 to the shaped charge.
  • a third washer 63 represents, opposite each ignition point 54 to 61, a groove, respectively 64 to 71, concentric with the axis A-A of the grenade and extending over 22 degrees 30 minutes. These grooves are filled with an explosive material 72. Each free end of these grooves is in relation to holes 73 to 88, provided in the washer 63, in order to obtain in this case sixteen ignition points, respectively 89 to 104.
  • This washer 63 is provided with a positioning notch 105 cooperating with said projection 31 of the grenade.
  • shock waves from points 54 to 61 are transferred to the explosive material 72 contained in the grooves 64 to 71 of the washer 63. These waves move through passages 73 to 88 in order to be transferred, at sixteen points, to the hollow charge 2.
  • the distances to be traveled by the shock wave in the different grooves of a washer 10, 32, 63 from the starting point of the shock wave to the respective ignition points 11 to 14, 54 to 61 and 89 to 104 are strictly equal in order to obtain in all circumstances an ignition simultaneously in all the ignition points.
  • FIG. 13 Another embodiment variant according to the invention is illustrated in FIG. 13.
  • three washers 106, 107 and 108 are applied in the same way as in the previous examples, alone or in combination.
  • Each washer is preceded by a ring 109, 110 and 111 made of explosive material.
  • the washers 106 to 108 form, so to speak, barriers for the shock waves and are provided, in order to transfer the shock waves in a symmetrical and angularly equidistant manner, passages 112-113, 114 to 117 and 118 to 125 respectively to the shaped charge 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Description

L'invention concerne une grenade anti-véhicule comportant une tête, une queue tubulaire prolongeant la tête, la tête étant traversée par un alésage axial débouchant en un alésage axial de ladite queue tubulaire, une charge creuse située dans la tête symétriquement autour de l'alésage axial et un détonateur.The invention relates to an anti-vehicle grenade comprising a head, a tubular tail extending the head, the head being traversed by an axial bore opening into an axial bore of said tubular tail, a hollow charge located in the head symmetrically around the axial bore and a detonator.

Une telle grenade correspondant au préambule de la revendication 1 est connue de EP-A-0 030 051 qui concerne l'emploi d'un passe-balle particulier dans un des alésages susdits.Such a grenade corresponding to the preamble of claim 1 is known from EP-A-0 030 051 which relates to the use of a particular bullet pass in one of the above bores.

Il est également connu que l'emploi d'une charge creuse exige un allumage symétrique. Or, la présence du susdit alésage central ne permet pas un tel allumage symétrique si le détonateur se trouve excentrée par rapport à l'axe longitudinal de la grenade.It is also known that the use of a shaped charge requires a symmetrical ignition. However, the presence of the aforesaid central bore does not allow such a symmetrical ignition if the detonator is offset from the longitudinal axis of the grenade.

Ceci n'est pas le cas dans la grenade selon EP-A-0 030 051 qui ne mentionne ni détonateur asymétrique, ni pointe de percussion excentrée. En guise de détonateur une fusée tubulaire est montée symétriquement à l'extrémité avant de la tête.This is not the case in the grenade according to EP-A-0 030 051 which does not mention either asymmetric detonator or eccentric percussion point. As a detonator a tubular rocket is mounted symmetrically at the front end of the head.

La présente invention a donc pour objet de réaliser une grenade à charge creuse destinée à être lancée à l'aide d'un fusil et permettant un allumage symétrique de la charge creuse à partir d'une pointe de percussion excentrée.The object of the present invention is therefore to produce a hollow charge grenade intended to be launched using a rifle and allowing symmetrical ignition of the hollow charge from an eccentric percussion point.

A cet effet, entre le détonateur disposé d'une manière asymétrique par rapport à l'axe A-A de la grenade, et la charge creuse de la grenade, sont montés des moyens permettant d'obtenir un allumage symétrique par rapport à l'axe de ladite creuse, ces moyens comprenant des moyens de transfert de l'onde de choc provoqué par le détonateur, ces moyens définissant des voies de conduite de cette onde entre un point adjacent au détonateur et plusieurs points d'allumage disposés symétriquement autour de l'axe longitudinal de la grenade, ces voies ayant des dimensions telles entre le point initial et chacun des points d'allumage, que les ondes mettent le même temps pour arriver du point initial aux points d'allumage.To this end, between the detonator arranged asymmetrically with respect to the axis AA of the grenade, and the hollow charge of the grenade, are mounted means making it possible to obtain an ignition symmetrical with respect to the axis of said hollow, these means comprising means for transferring the shock wave caused by the detonator, these means defining ways of conducting this wave between a point adjacent to the detonator and several ignition points arranged symmetrically around the axis longitudinal of the grenade, these routes having dimensions such between the initial point and each of the ignition points, that the waves take the same time to arrive from the initial point to the ignition points.

L'utilisation de moyens de transfert de l'onde de choc est connue en soi de US-A-3 311 055 et US-A-3 561 361, mais ces deux brevets ne concernent pas une grenade mais des systèmes de détonation.The use of shock wave transfer means is known per se from US-A-3,311,055 and US-A-3,561,361, but these two patents do not concern a grenade but detonation systems.

US-A-3 311 055 concerne en fait un détonateur secondaire (booster) pour la détonation d'un cône de charge. Des longueurs d'explosif entouré de métal sont placées dans des rainures concentriques dans la paroi d'une chambre dans laquelle la charge de détonation annulaire est située. Dans une rainure, des longueurs d'explosif relient un point d'initiation à des connections en forme de T metant une longueur en communication avec deux longueurs dans une rainure adjacente, chacune de ces dernières longueurs étant en communication par des connections en forme de T avec deux autres longueurs dans une autre rainure.US-A-3,311,055 relates in fact to a secondary detonator (booster) for the detonation of a charge cone. Lengths of explosive surrounded by metal are placed in concentric grooves in the wall of a chamber in which the annular detonation charge is located. In a groove, lengths of explosive connect an initiation point to T-shaped connections putting a length in communication with two lengths in an adjacent groove, each of these latter lengths being in communication by T-shaped connections with two other lengths in another groove.

US-A-3 561 361 décrit un détonateur cylindrique monté de manière symétrique sur une charge formée qui n'est pas vraiment creuse. Des canaux remplis d'explosif relient directement ou par l'intermédiaire d'une chambre ronde centrale un point d'initiation à la chambre composée de deux éléments, de sorte que la détonation de l'élément extérieur soit antérieure à la détonation de l'élément intérieur de la charge.US-A-3,561,361 describes a cylindrical detonator mounted symmetrically on a shaped charge which is not really hollow. Explosive-filled channels connect directly or through a central round chamber an initiation point to the chamber composed of two elements, so that the detonation of the external element is prior to the detonation of the internal element of the load.

Dans une forme de réalisation particulière ou l'invention, le détonateur fait partie d'un dispositif de sécurité disposé dans la tête entre la charge creuse et la queue.In a particular embodiment or the invention, the detonator is part of a safety device placed in the head between the shaped charge and the tail.

Dans une forme de réalisation efficace de l'invention, les moyens de transfert de l'onde de choc comprennent au moins une rondelle disposée entre le détonateur et la charge creuse transversalement par rapport à l'axe longitudinal, et comprenant des rainures remplies d'une matière explosive formant les voies de conduite.In an effective embodiment of the invention, the means for transferring the shock wave comprise at least one washer disposed between the detonator and the shaped charge transversely to the longitudinal axis, and comprising grooves filled with an explosive material forming the driving paths.

A titre illustratif et non restrictif, des exemples de réalisation de l'invention sont décrits ci-après avec référence aux dessins annexés, dans lesquels :

  • la figure 1 représente en coupe longitudinale une grenade anti-véhicule selon l'invention;
  • les figures 2 et 4 représentent des vues, respectivement selon les lignes II-II et IV-IV de la figure 1;
  • la figure 3 représente une coupe selon la ligne III-III de la figure 2;
  • la figure 5 représente une variante d'exécution de la partie indiquée en F5 dans la figure 1;
  • les figures 6 et 8 représentent des coupes selon les lignes VI-VI et VIII-VIII de la figure 5;
  • la figure 7 représente une coupe selon la ligne VII-VII de la figure 6;
  • la figure 9 représente une deuxième variante de la partie indiquée en F5 dans la figure 1;
  • les figures 10 et 12 représentent des coupes selon les lignes X-X et XII-XII de la figure 9;
  • la figure 11 représente une coupe selon la ligne XI-XI de la figure 10;
  • la figure 13 représente, en perspectif et un vue explosée, une variante de l'exécution selon la figure 9.
By way of illustration and without limitation, examples of embodiment of the invention are described below with reference to the appended drawings, in which:
  • Figure 1 shows in longitudinal section an anti-vehicle grenade according to the invention;
  • Figures 2 and 4 show views, respectively along lines II-II and IV-IV of Figure 1;
  • Figure 3 shows a section along line III-III of Figure 2;
  • FIG. 5 represents an alternative embodiment of the part indicated at F5 in FIG. 1;
  • Figures 6 and 8 show sections along lines VI-VI and VIII-VIII of Figure 5;
  • Figure 7 shows a section along line VII-VII of Figure 6;
  • FIG. 9 represents a second variant of the part indicated at F5 in FIG. 1;
  • Figures 10 and 12 show sections along lines XX and XII-XII of Figure 9;
  • Figure 11 shows a section along line XI-XI of Figure 10;
  • FIG. 13 represents, in perspective and an exploded view, a variant of the execution according to FIG. 9.

La figure 1 représente une grenade selon l'invention constituée substantiellement par une tête 1 comportant une charge creuse 2, un dispositif de sécurité 3 comportant le détonateur 4 et un dispositif à pointe de percussion 5, la grenade étant traversée par un alésage axial 6, prolongé par un deuxième alésage axial 7 prévu dans la queue 8 de la grenade.FIG. 1 represents a grenade according to the invention constituted essentially by a head 1 comprising a hollow charge 2, a safety device 3 comprising the detonator 4 and a device with percussion point 5, the grenade being traversed by an axial bore 6, extended by a second axial bore 7 provided in the tail 8 of the grenade.

Dans cet alésage 7 est monté un passe-balle 9 tel que décrit dans le brevet belge 880349 de la demanderesse.In this bore 7 is mounted a ball pass 9 as described in Belgian patent 880349 of the applicant.

Tous ces éléments sont connus en soi et ne seront donc pas décrit en détail.All these elements are known per se and will therefore not be described in detail.

Afin de réaliser un allumage de la charge creuse 2, la grenade comporte selon l'invention, entre le dispositif de sécurité 3, plus spécialement le détonateur 4 et la charge creuse proprement dite 2, un dispositif 10 pour le transfert de l'onde de choc provenant de l'allumage du détonateur 4 vers la charge creuse 2, par exemple une rondelle 10. Cette dernière est réalisée d'une telle manière qu'elle permet d'obtenir un allumage symétrique de la charge creuse.In order to produce an ignition of the hollow charge 2, the grenade comprises according to the invention, between the safety device 3, more particularly the detonator 4 and the hollow charge proper 2, a device 10 for the transfer of the wave of shock coming from the ignition of the detonator 4 towards the hollow charge 2, for example a washer 10. The latter is produced in such a way that it makes it possible to obtain a symmetrical ignition of the hollow charge.

Dans l'exemple des figures 2 à 4 la rondelle de transfert 10 est réalisée d'une telle manière qu'elle comporte quatre points de transfert, respectivement 11, 12, 13 et 14, disposés d'une manière concentrique et sous des angles égaux par rapport à l'axe longitudinal A-A de la grenade.In the example of FIGS. 2 to 4, the transfer washer 10 is produced in such a way that it has four transfer points, respectively 11, 12, 13 and 14, arranged concentrically and at equal angles. relative to the longitudinal axis AA of the grenade.

A cet effet la rondelle 10 comporte des rainures remlies d'une matière explosive 15.To this end, the washer 10 has grooves filled with an explosive material 15.

Une première rainure 16 est réalisée sur un arc de cercle de 180 degrés et dont la partie médiane 17 est située en face de la dite pointe de percussion et du détonateur 4.A first groove 16 is produced on an arc of a circle of 180 degrees and the middle part 17 of which is located opposite the said percussion point and the detonator 4.

Cette rainure 16 est à chaque extrémité libre prolongée par des rainures 18-19 alignées dirigées l'une vers l'autre. Chaque rainure 18-19 se termine dans une rainure respectivement 20-21 située d'une manière concentrique par rapport à la rainure 16 et s'étendant sur 90 degrés, plus spécialement encore sur deux fois 45 degrés de part et d'autre des rainures 18-19. Chaque extrémité libre de ces deux rainures 20 et 21 est prolongée par des rainures radiales, respectivement 22, 23, 24 et 25 dirigées vers l'axe A-A de la grenade, chacune de ces rainures 22 à 25 étant en relation avec un des trous 26, 27, 28 et 29 constituant lesdits points de transfert ou d'allumage 11 à 14.This groove 16 is at each free end extended by aligned grooves 18-19 directed towards each other. Each groove 18-19 ends in a groove respectively 20-21 situated concentrically with respect to the groove 16 and extending over 90 degrees, more especially still over twice 45 degrees on either side of the grooves 18-19. Each free end of these two grooves 20 and 21 is extended by radial grooves, respectively 22, 23, 24 and 25 directed towards the axis AA of the grenade, each of these grooves 22 to 25 being in relation to one of the holes 26 , 27, 28 and 29 constituting said transfer or ignition points 11 to 14.

Afin de situer la position exacte de la rondelle 10 par rapport au détonateur 4, ladite rondelle est en l'occurrence pourvue d'une échancrure 30 pouvant coopérer avec une partie intérieurement saillante 31 du corps de la grenade. Il va de soi que les longueurs des parties constitutives des susdites rainures doivent être parfaitement identiques et d'une longueur égale afin d'obtenir un allumage symétrique c.a.d. un allumage de la charge creuse 2 à la fois dans les quatre points 11 à 14.In order to locate the exact position of the washer 10 relative to the detonator 4, said washer is in this case provided with a notch 30 capable of cooperating with an internally projecting part 31 of the body of the grenade. It goes without saying that the lengths of the constituent parts of the above-mentioned grooves must be perfectly identical and of equal length in order to obtain a symmetrical ignition ie an ignition of the shaped charge 2 at the same time in the four points 11 to 14.

La rondelle 10, plus spécialement la distance mutuelle des rainures et la profondeur de ces rainures par rapport à l'épaisseur de la rondelle 10 sont réalisées d'une telle manière que des courts circuits sont évites entre d'une part, les rainures voisines 16,20 et 21 et d'autre part, entre la matière explosive 15 et la charge creuse 2 aux endroits des rainures.The washer 10, more particularly the mutual distance of the grooves and the depth of these grooves relative to the thickness of the washer 10 are made in such a way. so that short circuits are avoided between on the one hand, the neighboring grooves 16, 20 and 21 and on the other hand, between the explosive material 15 and the shaped charge 2 at the locations of the grooves.

Le fonctionnement de la grenade équipée avec une rondelle 10 telle que décrit ci-avant est très simple et comme suit.The operation of the grenade equipped with a washer 10 as described above is very simple and as follows.

Lorsque la pointe 5 percute le détonateur 4, l'onde de choc ainsi produit est transferé à la matière 15 contenu dans la rainure 16 de la rondelle 10. L'onde de choc se déplace ainsi à la fois vers les rainures 18-19, puis vers les rainures 20-21 et ensuite vers les rainures 22 à 25 pour aboutir, par la matière explosive contenu dans les passages 26 à 29, à la charge creuse 2, eventuellement par l'intermédiaire d'un relais classique.When the tip 5 strikes the detonator 4, the shock wave thus produced is transferred to the material 15 contained in the groove 16 of the washer 10. The shock wave thus moves both towards the grooves 18-19, then towards the grooves 20-21 and then towards the grooves 22 to 25 to reach, by the explosive material contained in the passages 26 to 29, the hollow charge 2, possibly via a conventional relay.

A remarquer que l'allumage de la charge creuse 2 se réalise ainsi d'une manière symétrique, notamment au même moment dans les quatre points 11 à 14 situes à angles égaux l'un par rapport à l'autre.Note that the ignition of the hollow charge 2 is thus carried out in a symmetrical manner, in particular at the same time in the four points 11 to 14 situated at equal angles to one another.

Dans l'exemple de la figure 5 la rondelle 10 a été dédoublée par une deuxième rondelle 32, réalisée d'une telle manière que les ondes de choc provenant des quatre points 11 à 14 sont transférés à des matières explosives 33 engagées dans des rainures circulaires, respectivement 34, 35, 36 et 37, prévues dans la rondelle 32.In the example of FIG. 5, the washer 10 has been split by a second washer 32, produced in such a way that the shock waves coming from the four points 11 to 14 are transferred to explosive materials 33 engaged in circular grooves, respectively 34, 35, 36 and 37, provided in the washer 32.

Lesdites rainures 34 à 37 sont chacune, à chaque extrémité libre, prolongées par des rainures radiales, respectivement 38-39, 40-41, 42-43 et 44-45, dirigées vers l'extérieur. Les extrémités libres des rainures 38 à 45, sont chacune en relation avec des trous 46 à 53 afin d'obtenir ainsi une multiplication des points d'allumages 54 à 61. Il va de soi qu'on obtient ainsi une meilleure répartition symétrique des points d'allumage par rapport à la charge creuse 2. Ladite deuxième rondelle présente également une rainure de positionnement 62.Said grooves 34 to 37 are each, at each free end, extended by radial grooves, respectively 38-39, 40-41, 42-43 and 44-45, directed outwards. The free ends of the grooves 38 to 45 are each in relation to holes 46 to 53 in order to thus obtain a multiplication of the ignition points 54 to 61. It goes without saying that a better symmetrical distribution of the points is thus obtained ignition relative to the shaped charge 2. Said second washer also has a positioning groove 62.

Le fonctionnement de la grenade équipée avec des rondelles 10 et 32 est semblable à celui décrit ci-avant. Dans cette exécution les ondes de choc provenant des points 11 à 14 sont transférés à la matière explosive 33 contenue dans les rainures 34 à 37. Les ondes de choc se déplacent à la fois vers les rainures 38 à 45 et puis à la matière explosive contenue dans les passages 46 à 53 afin d'être transférées en même temps, en huit points, à la charge creuse 2.The operation of the grenade equipped with washers 10 and 32 is similar to that described above. In this execution, the shock waves from points 11 to 14 are transferred to the explosive material 33 contained in the grooves 34 to 37. The shock waves travel both to the grooves 38 to 45 and then to the explosive material contained. in passages 46 to 53 in order to be transferred at the same time, at eight points, to the shaped charge 2.

Selon l'invention, les dimensions des différentes rainures sont toujours déterminées d'une telle manière que les ondes de choc sont transmis, simultanément dans les huit points 54 à 61 à la charge creuse.According to the invention, the dimensions of the different grooves are always determined in such a way that the waves of shock are transmitted simultaneously in the eight points 54 to 61 to the shaped charge.

Afin de multiplier davantage ledit nombre de points d'allumage, il est possible, tel que représenté à la figure 9, d'augmenter encore le nombre de rondelles. C'est ainsi qu'une troisième rondelle 63 représente en face de chaque point d'allumage 54 à 61 une rainure, respectivement 64 à 71, concentrique à l'axe A-A de la grenade et s'étendant sur 22 degrés 30 minutes. Ces rainures sont remplies d'une matière explosive 72. Chaque extrémité libre de ces rainures, est en relation avec des trous 73 à 88, prévus dans la rondelle 63, afin d'obtenir en l'occurrence seize points d'allumage, respectivement 89 à 104.In order to further multiply said number of ignition points, it is possible, as shown in FIG. 9, to further increase the number of washers. Thus a third washer 63 represents, opposite each ignition point 54 to 61, a groove, respectively 64 to 71, concentric with the axis A-A of the grenade and extending over 22 degrees 30 minutes. These grooves are filled with an explosive material 72. Each free end of these grooves is in relation to holes 73 to 88, provided in the washer 63, in order to obtain in this case sixteen ignition points, respectively 89 to 104.

Il va de soi qu'on obtient de cette manière un allumage parfaitement symétrique c.a.d. à la fois en un nombre considérable de points situés concentriquement et de manière équidistante.It goes without saying that this way a perfectly symmetrical ignition is obtained, ie both at a considerable number of points located concentrically and equidistantly.

Cette rondelle 63 est pourvue d'une échancrure de positionnement 105 coopérant avec ledit saillie 31 de la grenade.This washer 63 is provided with a positioning notch 105 cooperating with said projection 31 of the grenade.

Dans cet exemple, les ondes de choc provenant des points 54 à 61 sont transférées à la matière explosive 72 contenu dans les rainures 64 à 71 de la rondelle 63. Ces ondes se déplacent au travers de passages 73 à 88 afin d'être transférées, en seize points, à la charge creuse 2.In this example, the shock waves from points 54 to 61 are transferred to the explosive material 72 contained in the grooves 64 to 71 of the washer 63. These waves move through passages 73 to 88 in order to be transferred, at sixteen points, to the hollow charge 2.

Il est à remarquer que les distances à parcourir par l'onde de choc dans le différentes rainures d'une rondelle 10, 32, 63 à partir du point de départ de l'onde de choc jusqu'aux points d'allumages respectif 11 à 14, 54 à 61 et 89 à 104 sont strictement égales dans le but d'obtenir dans toutes circonstances un allumage simultanément dans tous les points d'allumage.It should be noted that the distances to be traveled by the shock wave in the different grooves of a washer 10, 32, 63 from the starting point of the shock wave to the respective ignition points 11 to 14, 54 to 61 and 89 to 104 are strictly equal in order to obtain in all circumstances an ignition simultaneously in all the ignition points.

Il est évident qu'on pourrait envisager d'appliquer encore plus de rondelles et que la forme et la disposition des rainures peuvent varier en fonction de la position du point d'allumage et de le surface disponible. Ainsi est illustrée une autre variante d'exécution selon l'invention dans la figure 13.It is obvious that we could consider applying even more washers and that the shape and arrangement of the grooves may vary depending on the position of the ignition point and the available surface. Thus another embodiment variant according to the invention is illustrated in FIG. 13.

Dans cette exécution trois rondelles 106, 107 et 108 sont appliqueés de la même façon que dans les exemples précédentes seul ou en combinaison.In this embodiment, three washers 106, 107 and 108 are applied in the same way as in the previous examples, alone or in combination.

Chaque rondelle est précédée par un anneau 109,110 et 111 réalisé en matière explosive. Les rondelles 106 à 108 forment pour ainsi dire des barrières pour les ondes de choc et sont pourvues, afin de transférer les ondes de choc d'une manière symétrique et angulairement équidistante, de passages respectivement 112-113, 114 à 117 et 118 à 125 vers la charge creuse 2.Each washer is preceded by a ring 109, 110 and 111 made of explosive material. The washers 106 to 108 form, so to speak, barriers for the shock waves and are provided, in order to transfer the shock waves in a symmetrical and angularly equidistant manner, passages 112-113, 114 to 117 and 118 to 125 respectively to the shaped charge 2.

Le positionnement exacte des différentes rondelles l'une par rapport à l'autre, peut être obtenu par des d'échancrures ou rainures 126, 127 et 128.The exact positioning of the different washers with respect to each other can be obtained by notches or grooves 126, 127 and 128.

Le fonctionnement de cette variante est identique à celui décrit ci-avant.The operation of this variant is identical to that described above.

Claims (25)

  1. Anti-tank grenade containing a head (1), a tubular tail (8) extending the head, whereby the head (1) is crossed by an axial bore (6) opening on an axial bore (7) of said tubular tail (9) a hollow-shaped charge (2) situated symmetrically round the axial bore (6) in the head (1) and a detonator (4), characterized in that means making it possible to obtain a symmetrical ignition with regard to the axis of said hollow-shaped charge (2) have been mounted between the detonator (4), placed asymmetrically with regard to the axis A-A of the grenade, and the hollow-shaped charge (2) of the grenade, whereby these means contain means to transfer the shock wave caused by the detonator (4), said means determining the trajectories followed by this wave between a point adjacent to the detonator (4) and various ignition points (11 to 14, 54 to 61 and 89 to 104) which have been placed symmetrically around the longitudinal axis of the grenade, whereby the length of the trajectories between the initial point and each of the ignition points is such that the waves require the same time to reach all the ignition points (11 to 14, 54 to 61, 89 to 104) from the initial point.
  2. Anti-tank grenade according to claim 1, characterized in that the detonator (4) is part of a security device (5) provided in the head (1) between the hollow-shaped charge (2) and the tail (8).
  3. Anti-tank grenade according to any of claims 1 to 2, characterized in that the means to transfer the shock wave contain at least one washer (10-32-63-106-107-108) provided between the detonator (4) and the hollow-shaped charge (2), transversally with regard to the longitudinal axis and containing grooves filled with an explosive material (15-33-72) forming the trajectories.
  4. Anti-tank grenade according to the preceding claim, characterized in that the washer (106) (107) (108) is preceded by a ring (109) (110) (111) of explosive material, the washer (106) (107) (108) being provided with passages (112-113) (114 to 117) (118 to 125) which make it possible for the shock wave to be transferred to the following ring or to the explosive of the hollow-shaped charge.
  5. Anti-tank grenade according to claim 3, characterized in that the transfer means contain a single washer (10) provided with a first groove (16) extending over the arc of a circle of 180 degrees whose free ends are extended by aligned grooves (18-19) directed one towards the other, whereby the latter grooves are each connected to a curved groove (20-21) respectively extending over the arc of a circle of 90 degrees, the free ends of each of these grooves (20-21) being connected to radial grooves (22-23-24-25) whose ends are in turn connected to holes (26-27-28-29) provided in the washer (10) so as to realize ignition points (11 to 14) in the surface opposite to it containing said grooves (16-18-19-20-21-22-23-24-25).
  6. Anti-tank grenade according to claim 5, characterized in that the first groove (16) is placed in such a manner with regard to the detonator (4) that the detonator is situated opposite to the median part of said groove (16).
  7. Anti-tank grenade according to claim 4, characterized in that the means to transfer the shock wave contain a single washer (106) preceded by a ring (109) in explosive material and in that said washer (106) has diametrically opposed passages (112-113).
  8. Anti-tank grenade according to claim 7, characterized in that the passages (112-113) are formed by notches or grooves provided in the circumference of the washer (106).
  9. Anti-tank grenade according to any of claims 7 or 8, characterized in that the passages (112-113) in the washer (106) are situated opposite to the ring (109) preceding the washer (106).
  10. Anti-tank grenade according to claim 3, characterized in that the means to transfer the shock wave contain two washers (10-32) (106-107) placed between the detonator and the hollow-shaped charge (2), transversally with regard to the longitudinal axis and containing grooves filled with explosive material (15-33-72) forming the trajectories.
  11. Anti-tank grenade according to claim 10, characterized in that the first washer is provided with a first groove (16) extending over the arc of a circle of 180 degrees whose free ends are extended by aligned grooves (18-19) directed one towards the other, whereby the latter grooves are each connected to a curved groove (20-21) respectively extending over the arc of a circle of 90 degrees, the free ends of each of these grooves (20-21) being connected to radial grooves (22-23-24-25) whose ends are in turn connected to holes (26-27-28-29) provided in the washer (10) so as to realize ignition points (11 to 14) in the surface opposite to it containing said grooves (16-18-19-20-21-22-23-24-25), whereas the second washer (32) has four curved grooves (34 to 37) whose free ends are each extended by radial grooves (38-39), (40-41), (42-43) and (44-45) respectively directed towards the outside, the free ends of each of the latter being connected to holes (46 to 53) respectively provided in the washer (32) so as to realize ignition points (54 to 61).
  12. Anti-tank grenade according to claim 11, characterized in that the median parts of the curved grooves (34 to 37) are placed such that they are aligned with the holes (26 to 29) of the washer (10).
  13. Anti-tank grenade according to claim 10, characterized in that according to an embodiment of the grenade with two washers (106-107) each preceded by a ring (109-110) in explosive material, the first washer (106) has diametrically opposed passages (112-113), whereas the second washer (107) has four passages (114 to 117) respectively.
  14. Anti-tank grenade according to claim 13, characterized in that the passages (114 to 117) are formed by notches or grooves provided in the washer.
  15. Anti-tank grenade according to claim 14, characterized in that the passages (112-113) respectively on the one hand and (114 to 117) on the other hand are situated opposite to the ring (109) (110) in explosive material preceding the washers.
  16. Anti-tank grenade according to any of claims 13 to 15, characterized in that the passages (112-113) are situated at an angle of 90 degrees with regard to the detonator (4).
  17. Anti-tank grenade according to any of claims 13 to 16, characterized in that the passages (114 to 117) in the washer (107) are situated at an angle of 45 degrees with regard to the passages (112-113) in the washer (106).
  18. Anti-tank grenade according to claim 3, characterized in that the means to transfer the shock wave contain three washers (10-32-63), (106-107-108) placed between the detonator and the hollow-shaped charge (2), transversally with regard to the longitudinal axis and containing grooves filled with explosive material (15,33,72) forming the trajectories.
  19. Anti-tank grenade according to claim 18, characterized in that the first washer (10) is provided with a first groove (16) extending over the arc of a circle of 180 degrees whose free ends are extended by aligned grooves (18-19) directed one towards the other, whereby the latter grooves are each connected to a curved groove (20-21) respectively extending over the arc of a circle of 90 degrees, the free ends of each of these grooves (20-21) being connected to radial grooves (22-23-24-25) whose ends are in turn connected to holes (26-27-28-29) provided in the washer (10) so as to realize ignition points (11 to 14) in the surface opposite to it containing said grooves (16-18-19-20-21-22-23-24-25), whereas the second washer (32) has four curved grooves (34 to 37) whose free ends are each extended by radial grooves (38-39), (40-41), (42-43) and (44-45) respectively directed towards the outside, the free ends of each of the latter being connected to holes (46 to 53) respectively provided in the washer (32) so as to realize ignition points (54 to 61), and in that the third washer (63) has been provided with curved grooves (64 to 71) whose free ends are each connected with a hole (73 to 88) provided in the washer (63) so as to realize ignition points (89 to 104).
  20. Anti-tank grenade according to claim 19, characterized in that the median parts of the grooves (64 to 71) are situated such that they coincide with the holes (46 to 53) of the washer (32).
  21. Anti-tank grenade according to claim 18, characterized in that the means to transfer the shock wave contain three washers (106-107 and 108) each preceded by a ring (109-110-111) in explosive material, whereby the first ring (106) has diametrically opposed passages (112-113), whereas the second ring (107) has four passages (114 to 117) respectively and the third ring (108) has eight passages (118 to 125) respectively.
  22. Anti-tank grenade according to any of claims 3 to 21, characterized in that each washer has been provided with a positioning means with regard to the detonator (4) and with regard to another washer respectively.
  23. Anti-tank grenade according to claim 22, characterized in that said means consist of a notch or groove (30-62-105) provided in the exterior part of the washer (10-32-63).
  24. Anti-tank grenade according to claim 22, characterized in that said means consist of a notch or groove (119-120-124) provided in the interior part of the washer (106-107-108).
  25. Anti-tank grenade according to any of claims 3 to 24, characterized in that the distances to be covered by the shock wave in the different grooves of a washer (10) (32) (63) starting from the point of departure of the shock wave to the ignition points (11 to 14) (54 to 61) (89 to 104) respectively are all the same.
EP88201961A 1987-09-30 1988-09-08 Anti-vehicle grenade Expired - Lifetime EP0310160B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8701106A BE1000944A3 (en) 1987-09-30 1987-09-30 Granada anti-char.
BE8701106 1987-09-30

Publications (2)

Publication Number Publication Date
EP0310160A1 EP0310160A1 (en) 1989-04-05
EP0310160B1 true EP0310160B1 (en) 1992-04-22

Family

ID=3882890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88201961A Expired - Lifetime EP0310160B1 (en) 1987-09-30 1988-09-08 Anti-vehicle grenade

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US (1) US4920886A (en)
EP (1) EP0310160B1 (en)
KR (1) KR960006134B1 (en)
CN (1) CN1019524B (en)
AU (1) AU603931B2 (en)
BE (1) BE1000944A3 (en)
DE (2) DE310160T1 (en)
GR (2) GR890300161T1 (en)
SG (1) SG95192G (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2735567B1 (en) * 1995-06-13 1997-07-25 Tda Armements Sas MILITARY HEAD, ESPECIALLY WITH A CORE GENERATOR
US6408765B1 (en) * 1999-03-02 2002-06-25 State Of Israel-Ministry Of Defense Armament Development Authority-Rafael Door breaching device with safety adapter

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3561361A (en) * 1950-04-18 1971-02-09 Us Army Detonation system for shaped charges
US2772635A (en) * 1952-09-15 1956-12-04 Belge De Mecanique Et D Armeme Rifle grenade
US3170402A (en) * 1956-10-16 1965-02-23 Harold S Morton Equal length detonating cords for warhead detonation
US3111055A (en) * 1959-07-06 1963-11-19 H G Weber And Company Inc Notch cutting unit
US3311055A (en) * 1965-04-23 1967-03-28 Jr Richard H Stresau Toroidal booster with cylindrically symmetrical output
US3855933A (en) * 1967-05-11 1974-12-24 Us Army Dual purpose grenade
US4282814A (en) * 1974-12-20 1981-08-11 The United States Of America As Represented By The Secretary Of The Navy Dual-end warhead initiation system
US4145972A (en) * 1976-12-17 1979-03-27 The United States Of America As Represented By The Secretary Of The Navy Dual-mode warhead initiation system
FR2498313A2 (en) * 1977-11-24 1982-07-23 Serat Explosive shell using hollow charge - has ring of initiating charges in each layer of charge forming multiple initiating points
US4230042A (en) * 1978-07-26 1980-10-28 Dragolyoub Popovitch Point-detonating impact fuze
BE880349A (en) * 1979-11-30 1980-05-30 Herstal Sa SHOTGUN GRENADE
US4579059A (en) * 1984-03-27 1986-04-01 Abraham Flatau Tubular projectile having an explosive material therein
DE3625967A1 (en) * 1986-07-31 1988-02-11 Diehl Gmbh & Co IGNITION FOR A PROJECT-FORMING LOAD
US4771696A (en) * 1987-05-18 1988-09-20 John Smolnik Base closure for thinwall carrier projectile

Also Published As

Publication number Publication date
CN1019524B (en) 1992-12-16
AU603931B2 (en) 1990-11-29
US4920886A (en) 1990-05-01
DE3870382D1 (en) 1992-05-27
EP0310160A1 (en) 1989-04-05
CN1032585A (en) 1989-04-26
GR3004445T3 (en) 1993-03-31
DE310160T1 (en) 1989-10-26
KR890005488A (en) 1989-05-15
AU2298388A (en) 1989-04-06
KR960006134B1 (en) 1996-05-09
GR890300161T1 (en) 1990-05-11
BE1000944A3 (en) 1989-05-23
SG95192G (en) 1992-12-04

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