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EP1728042A1 - Fragmentable grenade - Google Patents

Fragmentable grenade

Info

Publication number
EP1728042A1
EP1728042A1 EP05739413A EP05739413A EP1728042A1 EP 1728042 A1 EP1728042 A1 EP 1728042A1 EP 05739413 A EP05739413 A EP 05739413A EP 05739413 A EP05739413 A EP 05739413A EP 1728042 A1 EP1728042 A1 EP 1728042A1
Authority
EP
European Patent Office
Prior art keywords
projectiles
grenade
sheet
grenade according
web
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.)
Granted
Application number
EP05739413A
Other languages
German (de)
French (fr)
Other versions
EP1728042B1 (en
Inventor
Tanguy Catherine
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to PL05739413T priority Critical patent/PL1728042T3/en
Priority to SI200530120T priority patent/SI1728042T1/en
Publication of EP1728042A1 publication Critical patent/EP1728042A1/en
Application granted granted Critical
Publication of EP1728042B1 publication Critical patent/EP1728042B1/en
Priority to CY20071101632T priority patent/CY1107110T1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
    • F42B12/22—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
    • F42B12/32—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction the hull or case comprising a plurality of discrete bodies, e.g. steel balls, embedded therein or disposed around the explosive charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
    • F42B12/22—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
    • F42B12/24—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction with grooves, recesses or other wall weakenings

Definitions

  • the present invention relates to an improvement to the grenades used, for example in conjunction with tear gas, for dispersing crowds.
  • International application WO 97/18435 discloses a pomegranate of this type, fragmentable into several projectiles of kinetic energy sufficiently weak not to cause serious injury to persons affected thereby.
  • This grenade has an inner sheath and nonmetallic projectiles individually secured to this sheath and surrounded by a heat-shrinkable envelope.
  • Such a grenade requires the unitary manufacture of the projectiles, then their assembly on the inner sheath, which has repercussions on the cost of manufacture.
  • the outer shell may hinder the dispersion of the projectiles.
  • the invention meets this need by proposing a new fragmentable grenade, comprising: an explosive charge, a sheet of elastically deformable projectiles interconnected by material bridges integrally molded with the projectiles, this sheet surrounding the charge and being configured to to allow, during the explosion of this one, the separation and the dispersion of the projectiles.
  • a new fragmentable grenade comprising: an explosive charge, a sheet of elastically deformable projectiles interconnected by material bridges integrally molded with the projectiles, this sheet surrounding the charge and being configured to to allow, during the explosion of this one, the separation and the dispersion of the projectiles.
  • the presence of the projectile sheet simplifies the manufacture of the grenade, since the projectiles do not have to be manufactured or assembled individually.
  • the sheet can still be used to optimize the volume of the grenade, that is to say, for the same external size to increase the mass of the projectiles, or mass projectiles equal, reduce the caliber of the grenade.
  • the sheet comprises two assembled edges, preferably by gluing.
  • the grenade can thus comprise half-projectiles assembled along an assembly line.
  • the projectiles thus reconstituted may have ballistic characteristics very similar to those of the other projectiles of the sheet, which are monohthical.
  • the material bridges may be located on the outside of the web.
  • the material bridges may be located on the inside of the web or elsewhere.
  • the thickness of the bridges of material may be chosen according to the mechanical characteristics of the material used to mold the sheet and may represent less than 10%, better less than 5% of the maximum thickness of the projectiles.
  • the projectile web may be devoid of openwork, or alternatively may include openings, including openings extending between the material bridges. The projectiles are advantageously devoid of sharp edges, so as to limit the risk of serious injury during impact.
  • the projectiles have radially inner and outer faces each at least partially substantially in the form of cylinder portions and, between them, substantially planar and radial faces.
  • the web defines an inner housing in which the explosive charge is placed.
  • the grenade may include a detonator and a device for retarding ignition.
  • the inner housing can house the detonator and the possible ignition retarder, which is sold in the trade under the name of "self-timer igniter plug" and can have a screw or clip interface for launching manual of the grenade if it is equipped with a lever equipped with a safety pin, ie the launching with a firearm, generally a rifle, if it is equipped with a cap of self-propulsion and d a percussion primer.
  • the inner housing may have at its axial ends enlarged portions, and one of them can receive at least partially the detonator.
  • the elastically deformable material in which the projectiles are made may have a hardness of, for example, between 20 and 55 Shore A, in particular between 35 and 45 Shore A, or even about 40 Shore A, and be for example FEPDM, or any another suitable elastomer, natural or synthetic.
  • the material used may optionally be supplemented with chemicals intended to improve the physical or chemical qualities, during manufacture or after.
  • the elastically deformable material may, for example, comprise a filler of a compound making it possible to reduce the coefficient of friction of the grenade, for example graphite or PTFE.
  • the elastically deformable material may also include, where appropriate, metal particles or not, a composite material or plastic.
  • the added particles may, for example, make it possible to increase or reduce the density of the projectiles, for example they may make it possible to reduce the elasticity of the elastically deformable material, which may, for example, make it easier to break the bridges of material during the explosion of the load, for example an elastically deformable material having particles having dynamic characteristics comparable to those of biological tissues may be used, for example using materials similar to those usually used for cosmetic surgery prostheses, or exhibiting
  • At least one projectile may contain an agent, for example a powder, a liquid or a gas, intended to produce a physiological effect, for example CS or capsicum, This agent may for example be contained, in particular at encapsulated state, in a cavity defined by at least one projectile.
  • the grenade can be configured to be launched with a grenade launcher.
  • its firing can be caused for example by the impact on the target or on the ground.
  • the firing can be linked to a pyrotechnic chain triggering the shot of the grenade launcher.
  • the grenade may further include, if necessary, a guide shoe or overscaling to improve the coefficient of friction and the rear seal.
  • a shoe can also be used to launch grenades of an undersized caliber with an existing grenade launcher, configured to launch grenades of a higher caliber.
  • the invention further relates, independently or in combination with the foregoing, to a method of manufacturing a projectile web comprising the following step: molding with an elastically deformable material, in particular a natural or synthetic elastomer, a projectile layer with between them material bridges bringing them together.
  • an elastically deformable material in particular a natural or synthetic elastomer
  • a projectile layer with between them material bridges bringing them together.
  • the projectile sheets can each be monolithic.
  • Each web may have been molded flat, being for example of generally rectangular shape, then rolled and glued edge to edge, the two edges before gluing each comprising for example a row of half-projectiles.
  • a projectile sheet used to make a grenade can be molded in one piece with an annular shape in an elastically deformable material, then demolded by its elasticity, for example by externally applying a pressure lower than the existing pressure on the inner side of the projectile sheet, or by applying internally an overpressure. If appropriate, whatever the molding process used, the web may be dipped in a bath of a compound to reduce the coefficient of friction of the pomegranate, for example PTFE or the like.
  • the invention also relates to a method of assembling a fragmentable grenade, comprising: providing a sheet of projectiles connected by material bridges integrally molded with the projectiles, - the placement of an explosive charge in an inner housing defined by the tablecloth.
  • FIG. perspective view, schematic and partial, of a fragmentable grenade according to the invention FIG. 2 represents in isolation and in perspective a sheet of projectiles used to manufacture the grenade of FIG. 1
  • FIG. 3 is a partial, schematic transverse section of the projectile sheet of FIG. 1
  • FIG. represents in isolation in longitudinal section the projectile layer of FIG. 1.
  • FIG. 1 shows a fragmentable grenade 1 comprising a sheet 4 of projectiles 5 interconnected by material bridges 6, integrally molded with the projectiles 5.
  • the sheet 4 surrounds an explosive charge 2, contained in a tube 3, and known per se.
  • the sheet 4 is configured to allow, during the explosion of the load 2, the separation and the dispersion of the projectiles 5.
  • FIG. 2 shows separately the sheet 4 of projectiles, on the inner side and 5.
  • the sheet 4 has, when flattened for the purposes of observation, a generally rectangular shape and comprises for example three rows of projectiles 5, each of which comprises five projectiles. 5 integers and two half projectiles 5a, 5b.
  • the grenade 1 comprises thus three stages of projectiles each comprising six projectiles distributed circumferentially, as can be seen in Figure 4, eighteen projectiles in total. Of course, it is not beyond the scope of the present invention when the grenade comprises a different number of projectiles, for example between twelve and twenty four projectiles.
  • the material bridges 6 are located on the outside of the grenade 1. Their thickness e represents in the example considered less than 5% of the maximum thickness E of the projectiles, in this case about 4% of the maximum thickness E , as can be seen in Figure 3.
  • each projectile 5 has in cross section, as illustrated in FIG. 3, radially outer 11 and inner 12 substantially concentric sides joined by substantially radial sides 13 and 14 converging towards the center of the grenade 1.
  • the grenade 1 is generally symmetrical with respect to planes containing its longitudinal axis X.
  • the sheet 4 defines an inner housing 15 in which the explosive charge 2 is placed.
  • This inner housing 15 has a first portion 15a, substantially cylindrical, of a first radius Ri, and in this first portion a second enlarged portion 15b, with two substantially cylindrical stages of respective radii R 'and R 2 with
  • the housing 15 further comprises a third enlarged portion 15c, substantially cylindrical, radius R 3 > R 1, intended for example to receive a ring for fixing the explosive charge 2 in the middle of the sheet 4 of projectiles 5.
  • the tube 3 s tightly adjusts in the housing 15, and the ply 4 by deforming elastically can contribute to retain the tube 3 in the grenade 1.
  • the ply 4 is made of an elastically deformable material, which is in the example described a hardness between 20 and 55 Shore A, especially between 35 and 45 Shore A, or even about 40 Shore A.
  • the material used is, for example, FEPDM.
  • the elastically deformable material may comprise a charge of a compound making it possible to reduce the coefficient of friction of the outside of the grenade, for example graphite or PTFE.
  • the elastically deformable material may comprise metal particles, made of composite material or plastic material.
  • At least one of the projectiles may contain an agent such as a powder, a gas or a liquid, intended to produce a physiological effect, in particular CS or capsicum.
  • the material bridges 6 connect the projectiles 5 without forming apertures, but it is not beyond the scope of the present invention when for example the bridges of material 6 define apertures which may for example facilitate the detachment of the projectiles 5 from each other during the explosion of the explosive charge.

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Materials For Medical Uses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Catching Or Destruction (AREA)
  • Air Bags (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Toys (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Bridges Or Land Bridges (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Tires In General (AREA)
  • Peptides Or Proteins (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Tents Or Canopies (AREA)

Abstract

The invention relates to a fragmentable grenade ( 1 ) including an explosive charge ( 2 ) and a layer ( 4 ) of projectiles ( 5 ), which are elastically deformable and joined by bridges of material ( 6 ) produced by moulding together with the projectiles ( 5 ). The layer ( 4 ) surrounds the charge ( 2 ) and is designed for enabling the projectiles ( 5 ) to separate and disperse when the charge ( 2 ) explodes.

Description

Grenade fragmentable La présente invention concerne un perfectionnement aux grenades utilisées, par exemple conjointement à des gaz lacrymogènes, pour disperser des foules. On connaît par la demande internationale WO 97/18435 une grenade de ce type, fragmentable en plusieurs projectiles d'énergie cinétique suffisamment faible pour ne pas provoquer de blessures sérieuses aux personnes atteintes par ceux-ci. Cette grenade comporte une gaine intérieure et des projectiles non métalliques solidarisés individuellement à cette gaine et entourés d'une enveloppe thermorétractable. Une telle grenade nécessite la fabrication unitaire des projectiles, puis leur assemblage sur la gaine intérieure, ce qui se répercute sur le coût de fabrication. De plus, l'enveloppe extérieure peut gêner la dispersion des projectiles. Il existe un besoin pour disposer d'une grenade fragmentable plus simple et moins coûteuse à fabriquer. L'invention répond à ce besoin en proposant une nouvelle grenade fragmentable, comportant : une charge explosive, une nappe de projectiles élastiquement déformables reliés entre eux par des ponts de matière venus de moulage avec les projectiles, cette nappe entourant la charge et étant configurée pour permettre, lors de l'explosion de celle-ci, la séparation et la dispersion des projectiles. La présence de la nappe de projectiles permet de simplifier la fabrication de la grenade, puisque les projectiles n'ont plus à être fabriqués ni assemblés individuellement. The present invention relates to an improvement to the grenades used, for example in conjunction with tear gas, for dispersing crowds. International application WO 97/18435 discloses a pomegranate of this type, fragmentable into several projectiles of kinetic energy sufficiently weak not to cause serious injury to persons affected thereby. This grenade has an inner sheath and nonmetallic projectiles individually secured to this sheath and surrounded by a heat-shrinkable envelope. Such a grenade requires the unitary manufacture of the projectiles, then their assembly on the inner sheath, which has repercussions on the cost of manufacture. In addition, the outer shell may hinder the dispersion of the projectiles. There is a need to have a fragmentable grenade that is simpler and less expensive to manufacture. The invention meets this need by proposing a new fragmentable grenade, comprising: an explosive charge, a sheet of elastically deformable projectiles interconnected by material bridges integrally molded with the projectiles, this sheet surrounding the charge and being configured to to allow, during the explosion of this one, the separation and the dispersion of the projectiles. The presence of the projectile sheet simplifies the manufacture of the grenade, since the projectiles do not have to be manufactured or assembled individually.
La nappe peut encore permettre d'optimiser le volume de la grenade, c'est-à-dire pour un même encombrement extérieur d'augmenter la masse des projectiles, ou à masse des projectiles égale, de réduire le calibre de la grenade. Dans une réalisation particulière, la nappe comporte deux bords assemblés, de préférence par collage. La grenade peut ainsi comporter des demi-projectiles assemblés le long d'une ligne d'assemblage. Les projectiles ainsi reconstitués peuvent présenter des caractéristiques balistiques très proches de celles des autres projectiles de la nappe, qui sont monohthiques. Les ponts de matière peuvent être situés du côté extérieur de la nappe. Cela s'avère avantageux pour conférer à la grenade une surface extérieure relativement lisse sans avoir à recourir à une enveloppe thermorétractable rapportée, ce qui est utile notamment en cas d'éjection de la grenade par un lance-grenade. En variante, les ponts de matière peuvent être situés du côté intérieur de la nappe ou ailleurs. L'épaisseur des ponts de matière pourra être choisie en fonction des caractéristiques mécaniques du matériau utilisé pour mouler la nappe et pourra représenter moins de 10 %, mieux moins de 5 % de l'épaisseur maximale des projectiles. La nappe de projectile peut être dépourvue d' ajoure, ou en variante comporter des ajours, notamment des ajours s 'étendant entre les ponts de matière. Les projectiles sont avantageusement dépourvus d'arêtes vives, de manière à limiter le risque de lésions graves lors de l'impact. Dans un exemple de réalisation, les projectiles présentent des faces radialement intérieure et extérieure chacune au moins partiellement sensiblement en forme de portion de cylindre et, entre elles, des faces sensiblement planes et radiales. La nappe définit un logement intérieur dans lequel est placée la charge explosive. La grenade peut comporter un détonateur et un dispositif de retardement de l'allumage. Le logement intérieur peut loger le détonateur et l'éventuel dispositif de retardement de l'allumage, lequel est vendu dans le commerce sous le nom de « bouchon allumeur retardateur » et peut disposer d'une interface à vis ou à clip permettant soit le lancement manuel de la grenade s'il est muni d'un levier équipé d'une goupille de sécurité, soit le lancement avec une arme à feu, généralement un fusil, s'il est muni d'un bouchon d'auto-propulsion et d'une amorce à percussion. Le logement intérieur peut présenter à ses extrémités axiales des portions élargies, et l'une d'elles peut recevoir au moins partiellement le détonateur. Le matériau élastiquement déformable dans lequel les projectiles sont réalisés peut être d'une dureté comprise par exemple entre 20 et 55 Shore A, notamment entre 35 et 45 Shore A, voire de 40 Shore A environ, et être par exemple de FEPDM, ou tout autre élastomère convenable, naturel ou synthétique. Le matériau utilisé peut éventuellement être additionné de produits chimiques destinés à en améliorer les qualités physiques ou chimiques, pendant la fabrication ou après. Le matériau élastiquement déformable peut par exemple comporter une charge d'un composé permettant de <_taιinuer le coefficient de frottement de la grenade, par exemple du graphite ou du PTFE. Le matériau élastiquement déformable peut aussi comporter, le cas échéant, des particules métalliques ou non, en un matériau composite ou en matière plastique. Les particules ajoutées peuvent permettre par exemple d'augmenter ou de (iiniinuer la densité des projectiles. Elles peuvent permettre par exemple de réduire l'élasticité du matériau élastiquement déformable, ce qui peut permettre par exemple de faciliter la rupture des ponts de matière lors de l'explosion de la charge. On pourra par exemple utiliser un matériau élastiquement déformable comportant des particules ayant des caractéristiques dynamiques comparables à celles des tissus biologiques, en utilisant par exemple des matériaux similaires à ceux usuellement utilisés pour les prothèses de chirurgie esthétique, ou présentant des caractéristiques voisines. Au moins un projectile peut contenir un agent, par exemple une poudre, un liquide ou un gaz, destiné à produire un effet physiologique, par exemple du CS ou du capsicum. Cet agent peut par exemple être contenu, notamment à l'état encapsulé, dans une cavité définie par un projectile au moins. La grenade peut être configurée pour pouvoir être lancée à la main et présenter une taille adaptée à cet effet. En variante, la grenade peut être configurée pour être lancée avec un lance-grenade. Dans ce cas, sa mise à feu peut être provoquée par exemple par l'impact sur la cible ou sur le sol. En variante, la mise à feu peut être liée à une chaîne pyrotechnique de déclenchement du coup du lance-grenade. La grenade peut comporter en outre, le cas échéant, un sabot de guidage ou de surcalibrage destiné à améliorer le coefficient de frottement et l'étanchéité arrière. Un tel sabot peut également permettre de lancer des grenades d'un calibre sous-dimensionné avec un lance-grenade existant, configuré pour lancer des grenades d'un calibre supérieur. L'invention a encore pour objet, indépendamment ou en combinaison avec ce qui précède, un procédé de fabrication d'une nappe de projectiles comportant l'étape suivante : mouler avec un matériau élastiquement déformable, notamment un élastomère naturel ou synthétique, une nappe de projectiles avec entre eux des ponts de matière les réunissant. On peut notamment : - mouler en une seule fois une pluralité de nappes de projectiles avec entre eux des ponts de matière les réunissant dans un matériau élastiquement déformable, notamment un élastomère naturel ou synthétique, par exemple quatre nappes à la fois. Les nappes de projectiles peuvent chacune être monolithiques. Chaque nappe peut avoir été moulée à plat, étant par exemple de forme générale rectangulaire, puis roulée et collée bord à bord, les deux bords avant collage comportant par exemple chacun une rangée de demi-projectiles. Chaque nappe individuelle peut ainsi servir à la fabrication ultérieure d'une grenade. Une nappe de projectiles servant à fabriquer une grenade peut encore être moulée en un seul bloc avec une forme annulaire dans un matériau élastiquement déformable, puis démoulée grâce à son élasticité, par exemple en appliquant extérieurement une pression inférieure à la pression existant du côté intérieur de la nappe de projectiles, ou en appliquant intérieurement une surpression. Le cas échéant, quel que soit le procédé de moulage employé, la nappe peut être trempée dans un bain d'un composé permettant de diminuer le coefficient de frottement de la grenade, par exemple du PTFE ou analogue. L'invention a encore pour objet un procédé d'assemblage d'une grenade fragmentable, comportant : la fourniture d'une nappe de projectiles reliés par des ponts de matière venus de moulage avec les projectiles, - le placement d'une charge explosive dans un logement intérieur défini par la nappe. L'invention pourra être mieux comprise à la lecture de la description détaillée qui va suivre, d'un exemple de mise en œuvre non limitatif de celle-ci, et à l'examen du dessin annexé, sur lequel : la figure 1 est une vue en perspective, schématique et partielle, d'une grenade fragmentable conforme à l'invention, la figure 2 représente isolément et en perspective une nappe de projectiles servant à fabrication de la grenade de la figure 1, la figure 3 est une coupe transversale, partielle et schématique, de la nappe de projectiles de la figure 1, et - la figure 4 représente isolément en section longitudinale la nappe de projectiles de la figure 1. On a représenté à la figure 1 une grenade fragmentable 1 comportant une nappe 4 de projectiles 5 reliés entre eux par des ponts de matière 6, venus de moulage avec les projectiles 5. La nappe 4 entoure une charge explosive 2, contenue dans un tube 3, et connue en soi. La nappe 4 est configurée pour permettre, lors de l'explosion de la charge 2, la séparation et la dispersion des projectiles 5. Pour plus de clarté, on a représenté isolément à la figure 2 la nappe 4 de projectiles, du côté intérieur et après une déformation écartant les projectiles 5. Dans l'exemple considéré, la nappe 4 présente, lorsque mise à plat pour les besoins de l'observation, une forme générale rectangulaire et comporte par exemple trois rangées de projectiles 5, chacune desquelles comprenant cinq projectiles 5 entiers et deux demi-projectiles 5a, 5b. Ces derniers sont assemblés l'un à l'autre par collage le long d'une ligne d'assemblage A pour former le logement recevant le tube 3 contenant la charge 2, comme on peut le voir sur la figure 1. La grenade 1 comporte ainsi trois étages de projectiles 5 comportant chacun six projectiles répartis circonférentiellement, comme on peut le voir sur la figure 4, soit dix- huit projectiles au total. Bien entendu, on ne sort pas du cadre de la présente invention lorsque la grenade comporte un nombre différent de projectiles, par exemple entre douze et vingt quatre projectiles. Les ponts de matière 6 sont situés du côté extérieur de la grenade 1. Leur épaisseur e représente dans l'exemple considéré moins de 5 % de l'épaisseur maximale E des projectiles, en l'espèce environ 4 % de l'épaisseur maximale E, comme on peut le voir sur la figure 3. On voit également sur les figures 2 et 3 que les projectiles 5 comportent, dans les coins, des surfaces arrondies 7 permettant d'éviter qu'ils ne blessent gravement les personnes touchées. Chaque projectile 5 présente en section transversale, comme illustré à la figure 3, des côtés radialement extérieur 11 et intérieur 12 sensiblement concentriques, réunis par des côtés 13 et 14 sensiblement radiaux et convergents vers le centre de la grenade 1. Dans l'exemple considéré, une fois la nappe 4 assemblée, la grenade 1 est généralement symétrique par rapport à des plans contenant son axe longitudinal X. La nappe 4 définit un logement intérieur 15 dans lequel est placée la charge explosive 2. Ce logement intérieur 15 présente une première portion 15a, sensiblement cylindrique, d'un premier rayon Ri, et sous cette première portion une deuxième portion élargie 15b, avec deux étages sensiblement cylindriques de rayons respectifs R' et R2 avecThe sheet can still be used to optimize the volume of the grenade, that is to say, for the same external size to increase the mass of the projectiles, or mass projectiles equal, reduce the caliber of the grenade. In a particular embodiment, the sheet comprises two assembled edges, preferably by gluing. The grenade can thus comprise half-projectiles assembled along an assembly line. The projectiles thus reconstituted may have ballistic characteristics very similar to those of the other projectiles of the sheet, which are monohthical. The material bridges may be located on the outside of the web. This is advantageous for giving the pomegranate a relatively smooth outer surface without having to use a heat-shrinkable envelope reported, which is useful especially in case of ejection of the grenade by a grenade launcher. Alternatively, the material bridges may be located on the inside of the web or elsewhere. The thickness of the bridges of material may be chosen according to the mechanical characteristics of the material used to mold the sheet and may represent less than 10%, better less than 5% of the maximum thickness of the projectiles. The projectile web may be devoid of openwork, or alternatively may include openings, including openings extending between the material bridges. The projectiles are advantageously devoid of sharp edges, so as to limit the risk of serious injury during impact. In an exemplary embodiment, the projectiles have radially inner and outer faces each at least partially substantially in the form of cylinder portions and, between them, substantially planar and radial faces. The web defines an inner housing in which the explosive charge is placed. The grenade may include a detonator and a device for retarding ignition. The inner housing can house the detonator and the possible ignition retarder, which is sold in the trade under the name of "self-timer igniter plug" and can have a screw or clip interface for launching manual of the grenade if it is equipped with a lever equipped with a safety pin, ie the launching with a firearm, generally a rifle, if it is equipped with a cap of self-propulsion and d a percussion primer. The inner housing may have at its axial ends enlarged portions, and one of them can receive at least partially the detonator. The elastically deformable material in which the projectiles are made may have a hardness of, for example, between 20 and 55 Shore A, in particular between 35 and 45 Shore A, or even about 40 Shore A, and be for example FEPDM, or any another suitable elastomer, natural or synthetic. The material used may optionally be supplemented with chemicals intended to improve the physical or chemical qualities, during manufacture or after. The elastically deformable material may, for example, comprise a filler of a compound making it possible to reduce the coefficient of friction of the grenade, for example graphite or PTFE. The elastically deformable material may also include, where appropriate, metal particles or not, a composite material or plastic. The added particles may, for example, make it possible to increase or reduce the density of the projectiles, for example they may make it possible to reduce the elasticity of the elastically deformable material, which may, for example, make it easier to break the bridges of material during the explosion of the load, for example an elastically deformable material having particles having dynamic characteristics comparable to those of biological tissues may be used, for example using materials similar to those usually used for cosmetic surgery prostheses, or exhibiting At least one projectile may contain an agent, for example a powder, a liquid or a gas, intended to produce a physiological effect, for example CS or capsicum, This agent may for example be contained, in particular at encapsulated state, in a cavity defined by at least one projectile. have been configured to be hand-launched and have a size suitable for this purpose. Alternatively, the grenade can be configured to be launched with a grenade launcher. In this case, its firing can be caused for example by the impact on the target or on the ground. Alternatively, the firing can be linked to a pyrotechnic chain triggering the shot of the grenade launcher. The grenade may further include, if necessary, a guide shoe or overscaling to improve the coefficient of friction and the rear seal. Such a shoe can also be used to launch grenades of an undersized caliber with an existing grenade launcher, configured to launch grenades of a higher caliber. The invention further relates, independently or in combination with the foregoing, to a method of manufacturing a projectile web comprising the following step: molding with an elastically deformable material, in particular a natural or synthetic elastomer, a projectile layer with between them material bridges bringing them together. In particular, it is possible to: - mold a plurality of projectile layers at one time with material bridges joining them together in an elastically deformable material, in particular a natural or synthetic elastomer, for example four sheets at a time. The projectile sheets can each be monolithic. Each web may have been molded flat, being for example of generally rectangular shape, then rolled and glued edge to edge, the two edges before gluing each comprising for example a row of half-projectiles. Each individual tablecloth can thus be used for the subsequent manufacture of a grenade. A projectile sheet used to make a grenade can be molded in one piece with an annular shape in an elastically deformable material, then demolded by its elasticity, for example by externally applying a pressure lower than the existing pressure on the inner side of the projectile sheet, or by applying internally an overpressure. If appropriate, whatever the molding process used, the web may be dipped in a bath of a compound to reduce the coefficient of friction of the pomegranate, for example PTFE or the like. The invention also relates to a method of assembling a fragmentable grenade, comprising: providing a sheet of projectiles connected by material bridges integrally molded with the projectiles, - the placement of an explosive charge in an inner housing defined by the tablecloth. The invention may be better understood on reading the following detailed description of an example of non-limiting implementation thereof, and on examining the appended drawing, in which: FIG. perspective view, schematic and partial, of a fragmentable grenade according to the invention, FIG. 2 represents in isolation and in perspective a sheet of projectiles used to manufacture the grenade of FIG. 1, FIG. 3 is a partial, schematic transverse section of the projectile sheet of FIG. 1, and FIG. represents in isolation in longitudinal section the projectile layer of FIG. 1. FIG. 1 shows a fragmentable grenade 1 comprising a sheet 4 of projectiles 5 interconnected by material bridges 6, integrally molded with the projectiles 5. The sheet 4 surrounds an explosive charge 2, contained in a tube 3, and known per se. The sheet 4 is configured to allow, during the explosion of the load 2, the separation and the dispersion of the projectiles 5. For clarity, FIG. 2 shows separately the sheet 4 of projectiles, on the inner side and 5. In the example considered, the sheet 4 has, when flattened for the purposes of observation, a generally rectangular shape and comprises for example three rows of projectiles 5, each of which comprises five projectiles. 5 integers and two half projectiles 5a, 5b. These are assembled to one another by gluing along an assembly line A to form the housing receiving the tube 3 containing the load 2, as can be seen in FIG. 1. The grenade 1 comprises thus three stages of projectiles each comprising six projectiles distributed circumferentially, as can be seen in Figure 4, eighteen projectiles in total. Of course, it is not beyond the scope of the present invention when the grenade comprises a different number of projectiles, for example between twelve and twenty four projectiles. The material bridges 6 are located on the outside of the grenade 1. Their thickness e represents in the example considered less than 5% of the maximum thickness E of the projectiles, in this case about 4% of the maximum thickness E , as can be seen in Figure 3. It is also seen in Figures 2 and 3 that the projectiles 5 have, in the corners, rounded surfaces 7 to prevent they seriously hurt the affected people. Each projectile 5 has in cross section, as illustrated in FIG. 3, radially outer 11 and inner 12 substantially concentric sides joined by substantially radial sides 13 and 14 converging towards the center of the grenade 1. In the example considered once the sheet 4 has been assembled, the grenade 1 is generally symmetrical with respect to planes containing its longitudinal axis X. The sheet 4 defines an inner housing 15 in which the explosive charge 2 is placed. This inner housing 15 has a first portion 15a, substantially cylindrical, of a first radius Ri, and in this first portion a second enlarged portion 15b, with two substantially cylindrical stages of respective radii R 'and R 2 with
Rι< R'2 < R2, ce qui permet de loger par exemple le détonateur et un éventuel dispositif de retardement de l'allumage. Le logement 15 comporte encore supérieurement une troisième portion élargie 15c, sensiblement cylindrique, de rayon R3 > Ri, destinée par exemple à recevoir une couronne de fixation de la charge explosive 2 au milieu de la nappe 4 de projectiles 5. Le tube 3 s'ajuste étroitement dans le logement 15, et la nappe 4 en se déformant élastiquement peut contribuer à retenir le tube 3 dans la grenade 1. La nappe 4 est réalisée dans un matériau élastiquement déformable, qui est dans l'exemple décrit d'une dureté comprise entre 20 et 55 Shore A, notamment entre 35 et 45 Shore A, voire de 40 Shore A environ. Le matériau utilisé est par exemple de FEPDM. Le matériau élastiquement déformable peut comporter une charge d'un composé permettant de diminuer le coefficient de frottement de l'extérieur de la grenade, par exemple du graphite ou du PTFE. Le matériau élastiquement déformable peut comporter des particules métalliques, en matériau composite ou en matière plastique. Au moins l'un des projectiles peut contenir un agent tel qu'une poudre, un gaz ou un liquide, destiné à produire un effet physiologique, notamment du CS ou du capsicum. Dans ce qui vient d'être décrit, les ponts de matière 6 relient les projectiles 5 sans former d' ajours, mais on ne sort pas du cadre de la présente invention lorsque par exemple les ponts de matière 6 définissent des ajours qui peuvent par exemple faciliter le détachement des projectiles 5 les uns des autres lors de l'explosion de la charge explosive. Dans toute la description, y compris les revendications, l'expression « comportant un » doit être comprise comme étant synonyme de « comportant au moins un », sauf si le contraire est spécifié. Rι <R ' 2 <R 2 , which allows to house for example the detonator and a possible device for retarding ignition. The housing 15 further comprises a third enlarged portion 15c, substantially cylindrical, radius R 3 > R 1, intended for example to receive a ring for fixing the explosive charge 2 in the middle of the sheet 4 of projectiles 5. The tube 3 s tightly adjusts in the housing 15, and the ply 4 by deforming elastically can contribute to retain the tube 3 in the grenade 1. The ply 4 is made of an elastically deformable material, which is in the example described a hardness between 20 and 55 Shore A, especially between 35 and 45 Shore A, or even about 40 Shore A. The material used is, for example, FEPDM. The elastically deformable material may comprise a charge of a compound making it possible to reduce the coefficient of friction of the outside of the grenade, for example graphite or PTFE. The elastically deformable material may comprise metal particles, made of composite material or plastic material. At least one of the projectiles may contain an agent such as a powder, a gas or a liquid, intended to produce a physiological effect, in particular CS or capsicum. In what has just been described, the material bridges 6 connect the projectiles 5 without forming apertures, but it is not beyond the scope of the present invention when for example the bridges of material 6 define apertures which may for example facilitate the detachment of the projectiles 5 from each other during the explosion of the explosive charge. Throughout the description, including the claims, the phrase "having one" should be understood as being synonymous with "having at least one", unless the opposite is specified.

Claims

REVENDICATIONS
1. Grenade fragmentable (1), comportant : une charge explosive (2), - une nappe (4) de projectiles (5) élastiquement déformables reliés par des ponts de matière (6) venus de moulage avec les projectiles (5), cette nappe (4) entourant la charge (2) et étant configurée pour permettre, lors de l'explosion de la charge (2), la séparation et la dispersion des projectiles (5). 1. fragmentable grenade (1), comprising: an explosive charge (2), - a sheet (4) of projectiles (5) elastically deformable connected by material bridges (6) integrally molded with the projectiles (5), this web (4) surrounding the load (2) and being configured to allow, during the explosion of the load (2), the separation and dispersion of the projectiles (5).
2. Grenade selon la revendication précédente, caractérisée par le fait que la nappe (4) comporte des demi-projectiles (5a, 5b) assemblés le long d'une ligne d'assemblage (A), notamment par collage. 2. Grenade according to the preceding claim, characterized in that the web (4) comprises half-projectiles (5a, 5b) assembled along an assembly line (A), in particular by gluing.
3. Grenade selon l'une des revendications précédentes, caractérisée par le fait que les ponts de matière (6) sont situés du côté extérieur de la nappe (4). 3. Grenade according to one of the preceding claims, characterized in that the material bridges (6) are located on the outside of the web (4).
4. Grenade selon l'une quelconque des revendications précédentes, caractérisée par le fait que l'épaisseur (e) des ponts de matière (6) représente moins de4. Grenade according to any one of the preceding claims, characterized in that the thickness (e) of the bridges of material (6) represents less than
10 %, mieux moins de 5 % de l'épaisseur maximale (E) des projectiles. 10%, better less than 5% of the maximum thickness (E) of the projectiles.
5. Grenade selon l'une quelconque des revendications précédentes, caractérisée par le fait que les projectiles (5) sont dépourvus d'arêtes vives. 5. Grenade according to any one of the preceding claims, characterized in that the projectiles (5) are devoid of sharp edges.
6. Grenade selon l'une quelconque des revendications précédentes, caractérisée par le fait que les projectiles (5) présentent des faces radialement intérieure et extérieure chacune au moins partiellement sensiblement en forme de portion de cylindre et, entre elles, des faces sensiblement planes et radiales. 6. Grenade according to any one of the preceding claims, characterized in that the projectiles (5) have radially inner and outer faces each at least partially substantially cylinder-shaped portion and, between them, substantially flat faces and radials.
7. Grenade selon l'une quelconque des revendications précédentes, caractérisée par le fait que les projectiles (5) définissent un logement intérieur (15) dans lequel est placée la charge (2). 7. Grenade according to any one of the preceding claims, characterized in that the projectiles (5) define an inner housing (15) in which the load (2) is placed.
8. Grenade selon la revendication précédente, caractérisée par le fait que le logement intérieur (15) présente deux portions élargies (15b, 15c) à ses extrémités axiales. 8. Grenade according to the preceding claim, characterized in that the inner housing (15) has two enlarged portions (15b, 15c) at its axial ends.
9. Grenade selon l'une quelconque des revendications précédentes, caractérisée par le fait que le matériau élastiquement déformable dans lequel les projectiles sont réalisés est d'une dureté comprise entre 20 et 55 Shore A, notamment entre 35 et 45 Shore A, voire de 40 Shore A environ. 9. Grenade according to any one of the preceding claims, characterized in that the elastically deformable material in which the projectiles are made has a hardness of between 20 and 55 Shore A, in particular between 35 and 45 Shore A, or even 40 Shore A approx.
10. Grenade selon l'une quelconque des revendications précédentes, caractérisée par le fait qu'elle est dépourvue d'enveloppe extérieure. 10. Grenade according to any one of the preceding claims, characterized in that it is devoid of outer casing.
11. Procédé d'assemblage d'une grenade fragmentable, comportant les étapes suivantes : - fournir une nappe (4) de projectiles (5) reliés par des ponts de matière (6) venus de moulage avec les projectiles, - placer une charge explosive (2) dans un logement intérieur défini par la nappe. 11. A method of assembling a fragmentable grenade, comprising the following steps: - providing a sheet (4) of projectiles (5) connected by material bridges (6) integrally molded with the projectiles, - placing an explosive charge (2) in an inner housing defined by the web.
12. Procédé de fabrication d'une nappe de projectiles, comportant les étapes suivantes : mouler avec un matériau élastiquement déformable, notamment un élastomère naturel ou synthétique, une nappe (4) de projectiles (5) avec entre eux des ponts de matière (6) les réunissant. 12. A method of manufacturing a projectile sheet, comprising the following steps: molding with an elastically deformable material, in particular a natural or synthetic elastomer, a sheet (4) of projectiles (5) with between them material bridges (6). ) bringing them together.
13. Procédé selon la revendication précédente, comportant l'étape suivante : la nappe ayant été moulée avec une forme annulaire, démouler la nappe grâce à son élasticité en appliquant extérieurement une pression inférieure à la pression existant du côté intérieur de la nappe de projectiles, ou en appliquant intérieurement une surpression. 13. The method as claimed in the preceding claim, comprising the following step: the sheet having been molded with an annular shape, demolding the sheet by virtue of its elasticity by externally applying a pressure lower than the pressure existing on the inner side of the sheet of projectiles, or by applying internally an overpressure.
14. Procédé selon l'une des deux revendications précédentes, caractérisé par le fait qu'on trempe la nappe (4) dans un bain d'un composé permettant de diminuer le coefficient de frottement de la grenade. 14. Method according to one of the two preceding claims, characterized in that the quilt (4) is quenched in a bath of a compound to reduce the coefficient of friction of the grenade.
EP05739413A 2004-03-16 2005-03-11 Fragmentable grenade Expired - Lifetime EP1728042B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL05739413T PL1728042T3 (en) 2004-03-16 2005-03-11 Fragmentable grenade
SI200530120T SI1728042T1 (en) 2004-03-16 2005-03-11 Fragmentable grenade
CY20071101632T CY1107110T1 (en) 2004-03-16 2007-12-27 BREAKFAST HANDBALL

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0450527A FR2867849B1 (en) 2004-03-16 2004-03-16 FRAGMENTABLE GRENAGE
PCT/FR2005/050157 WO2005093364A1 (en) 2004-03-16 2005-03-11 Fragmentable grenade

Publications (2)

Publication Number Publication Date
EP1728042A1 true EP1728042A1 (en) 2006-12-06
EP1728042B1 EP1728042B1 (en) 2007-09-26

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EP05739413A Expired - Lifetime EP1728042B1 (en) 2004-03-16 2005-03-11 Fragmentable grenade

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US (1) US20080156220A1 (en)
EP (1) EP1728042B1 (en)
AT (1) ATE374353T1 (en)
BR (1) BRPI0508827A (en)
CA (1) CA2559884A1 (en)
CY (1) CY1107110T1 (en)
DE (1) DE602005002639T2 (en)
DK (1) DK1728042T3 (en)
ES (1) ES2296168T3 (en)
FR (1) FR2867849B1 (en)
PL (1) PL1728042T3 (en)
PT (1) PT1728042E (en)
WO (1) WO2005093364A1 (en)

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FR2923004B1 (en) * 2007-10-26 2009-12-04 Applic Des Procedes Lefebvre S FRAGMENTABLE GRENADE IN PROJECTILES OF LOW KINETIC ENERGY.
US9016888B2 (en) * 2008-09-19 2015-04-28 Jersey Tactical Corp. Non combustible, tactical flash device
FR2965910B1 (en) 2010-10-08 2012-11-02 Armement Et D Etudes Alsetex Soc D NON-LETHAL GRENADE
FR2980567B1 (en) * 2011-09-23 2015-09-04 Applic Des Procedes Lefebvre Soc D GRENADE OF MAINTENANCE OF THE ORDER
FR2989457B1 (en) 2012-04-12 2017-03-17 Soc D'armement Et D'etudes Alsetex NON-LETHAL FLAKE GRENADE COMPRISING MEANS FOR MAINTAINING IGNITION PLUG
RU2503920C1 (en) * 2012-12-14 2014-01-10 Открытое акционерное общество "Научно-производственное объединение "Прибор" Fragmentation grenade
WO2016100594A1 (en) * 2014-12-18 2016-06-23 Raytheon Company Explosive device with casing having voids therein
US11054230B1 (en) * 2018-06-14 2021-07-06 The United States Of America As Represented By The Secretary Of The Navy Flexible anti-personnel mine
FR3086746B1 (en) * 2018-10-01 2020-08-28 Nexter Munitions ENVELOPE FOR AMMUNITION AND AMMUNITION INCORPORATING SUCH AN ENVELOPE
US12203732B2 (en) * 2019-09-12 2025-01-21 Carl Salmon Grenade with independently detachable carpel segments
US11300392B1 (en) * 2020-12-21 2022-04-12 Attila G. Zoltan A.Z.G. TRI grenade
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Also Published As

Publication number Publication date
DK1728042T3 (en) 2008-02-11
DE602005002639T2 (en) 2008-06-19
ATE374353T1 (en) 2007-10-15
FR2867849B1 (en) 2006-07-21
WO2005093364A1 (en) 2005-10-06
DE602005002639D1 (en) 2007-11-08
CA2559884A1 (en) 2005-10-06
PT1728042E (en) 2008-01-09
BRPI0508827A (en) 2007-08-14
PL1728042T3 (en) 2008-03-31
CY1107110T1 (en) 2012-10-24
EP1728042B1 (en) 2007-09-26
ES2296168T3 (en) 2008-04-16
US20080156220A1 (en) 2008-07-03
FR2867849A1 (en) 2005-09-23

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