EP2620737A1 - Non lethal munition - Google Patents

Non lethal munition Download PDF

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Publication number
EP2620737A1
EP2620737A1 EP13151219.6A EP13151219A EP2620737A1 EP 2620737 A1 EP2620737 A1 EP 2620737A1 EP 13151219 A EP13151219 A EP 13151219A EP 2620737 A1 EP2620737 A1 EP 2620737A1
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EP
European Patent Office
Prior art keywords
projectile
tube
case
lethal ammunition
ammunition according
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
EP13151219.6A
Other languages
German (de)
French (fr)
Other versions
EP2620737B1 (en
Inventor
Nicolas Caillaut
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.)
Nexter Munitions SA
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Nexter Munitions SA
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Publication date
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Publication of EP2620737A1 publication Critical patent/EP2620737A1/en
Application granted granted Critical
Publication of EP2620737B1 publication Critical patent/EP2620737B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A1/00—Missile propulsion characterised by the use of explosive or combustible propellant charges
    • F41A1/06—Adjusting the range without varying elevation angle or propellant charge data, e.g. by venting a part of the propulsive charge gases, or by adjusting the capacity of the cartridge or combustion chamber
    • 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
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/067—Mounting or locking missiles in cartridge cases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B8/00—Practice or training ammunition
    • F42B8/02—Cartridges

Definitions

  • the technical field of the invention is that of non-lethal munitions.
  • Non-lethal ammunition generally includes a non-lethal projectile that is integral with a propellant charge holster.
  • the aforementioned patents describe 40mm ammunition for grenade launcher. These ammunition comprise a propellant charge which is disposed in a rear propulsion case integral with the case. This housing delimits a high pressure chamber which communicates with an internal volume to the case by a calibrated orifice. The internal volume of the case is what is called the low pressure chamber.
  • the projectile is crimped at a mouth of the case. It is separated from the latter when the pressure reaches a minimum level which depends both on the amount of powder and the volume of the low pressure chamber.
  • the decoupling effort may vary from one ammunition to another leading to dispersions of shooting speed characteristics. This is particularly troublesome for a projectile that must be non-lethal.
  • the low pressure chamber is delimited by the rear of the projectile.
  • a modification of the geometry of the projectile will affect its mass and its ballistic characteristics, which also partly condition its non-lethal character.
  • a reduction in the volume of the low pressure chamber will lead to an extension of the projectile and therefore to a heavier of the latter, which goes against the desired non-lethal effect.
  • the object of the invention is to propose an ammunition architecture that makes it possible to overcome such disadvantages.
  • the munition according to the invention thus makes it possible to control the speed of firing of the projectile despite the presence of a holster having significant dimensions which are imposed by the caliber of the weapon.
  • the ammunition according to the invention also makes it easier to mount the projectile on the case without this assembly adversely affecting the reproducibility of the firing speed characteristics of the projectile.
  • the invention relates to a non-lethal munition comprising a case incorporating a propellant housing, which encloses a propellant charge, and a projectile integral with the case, ammunition characterized in that the projectile is secured to the case by means of a tube extending a rear part of the projectile, coaxial tube to the case and attached to the propulsion unit at a level of outlet orifice of the propellant gases, the pressure of the gases from the propulsion unit being released when firing inside the tube.
  • the tube may comprise at least one annular rupture primer intended to break by the effect of the gas pressure during firing to release the projectile.
  • the tube may be formed in one piece with the rear part of the projectile.
  • the tube may be made of a plastic or composite material.
  • the propulsion unit comprises a high pressure chamber containing a propellant powder and disposed at a distance from an ignition component, the high pressure chamber being separated from an intermediate chamber by a grid and the chamber intermediate communicating with the interior of the tube via a nozzle.
  • the nozzle may comprise a neck followed by a conical portion comprising an insert for holding a lid closing the intermediate chamber.
  • the projectile may include a front portion of compressible foam.
  • the rear part of the projectile may comprise a peripheral bead constituting a belt, a first groove behind the bead and receiving an O-ring and a second groove behind the first groove and having a depth greater than that of the first groove.
  • the caliber of the projectile may be between 20 mm and 50 mm.
  • the figure 1 shows a munition 1 comprising a case 2 which incorporates at its rear part a propulsion unit 3 and which carries at its front part a projectile 4.
  • the case 2 is a metal case made of steel or brass and which is adapted to the caliber of the weapon intended to fire the projectile.
  • the case 2 represented in the figure is a case of 25 mm caliber which comprises at its front part a shrink 2a which surrounds the projectile 4 and at its rear a base 2b which carries a groove 2c allowing, after the firing of the ammunition , extracting the case 2 from the chamber of a weapon (not shown).
  • the propulsion casing 3 comprises a threaded portion 3a which is screwed into the base 2b of the casing. It contains at its rear part an ignition component 5, such as an igniter, which is connected to a high pressure chamber 6 by an axial channel 7.
  • an ignition component 5 such as an igniter
  • the high pressure chamber 6 contains a propellant powder 8 which is here a conventional grain powder usually used for medium caliber ammunition. For example a simple B7T base powder. This powder is disposed at a distance from the ignition component 5.
  • a wedge washer 9 is interposed between the bottom of the upper chamber pressure 6 and the powder 8 (this washer could however be omitted).
  • a straw 10 which can be of different materials (aluminum, tin, paper, or plastic material) is attached between the washer 9 and the propulsion unit 3. This straw 10 makes it possible to seal the axial channel 7.
  • the powder 8 is represented in the figure by a simple rectangle. It is understood that the grains of powder may also be housed in the internal volume of the washer 9 and will be held between the flap 10 and a metal gate 12 which separates the high pressure chamber 6 from an intermediate chamber 11. Of course, to maintain the grains of the powder 8 inside the high-pressure chamber 6, the grid 12 has a mesh size which is chosen smaller than the size of the grains of the propellant powder 8.
  • the mesh size of the grid 12 is of the order of 1 to 1.5 mm for powder grains 8 having a diameter of 2.2 mm and a height of 2.2 mm.
  • the propulsion unit 3 is extended at its front part by an intermediate piece 13 which delimits the intermediate chamber 11 and which carries an axial nozzle 14.
  • the nozzle comprises a rear portion 14a forming the nozzle neck (part having a venturi profile c ie a convergent cone followed by a diverging cone) and a conical front portion 14b.
  • the latter is formed by an insert which is screwed inside the intermediate piece 13 and which maintains a lid 15 closing the nozzle 14.
  • the cap 15 ensures a good ignition of the powder 8 in ensuring the confinement of the gases contained in the intermediate chamber 11. When the pressure reaches a certain level in this chamber 11, the lid 15 is broken.
  • the projectile 4 is secured to the case 2 by via a tube 16 which extends a rear portion 4a of the projectile 4.
  • the tube 16 is formed integrally with the rear part 4a of the projectile.
  • the tube 16 and the rear part 4a of the projectile are made of a plastic material or a composite material.
  • the tube 16 comprises an annular rupture primer 17 which is a groove separating the tubular portion 16 (intended to remain inside the case 2 after firing) and the rear portion 4a of the projectile.
  • the tube 16 is coaxial with the case 2 and has a threaded portion 16a which is screwed on the intermediate piece 13 extending the propulsion unit 3.
  • the tube 16 caps the nozzle 14 of the propellant gas outlet.
  • the volume 16b internal to the tube 16 constitutes a low pressure chamber within which the pressure of the gases from the propulsion unit 3 will be released during firing.
  • This internal volume 16b extends axially inside the rear part 4a of the projectile, beyond the breaking primer 17.
  • the rupture primer 17 is intended to break by the effect of the pressure of the gases exerted during the firing in the chamber 16b, thus releasing the projectile 4.
  • the projectile 4 which is represented at figure 1 comprises a front portion 4b compressible foam which is housed in an internal bore 18 to the rear part 4a of the projectile.
  • the foam 4b is bonded to the rear portion 4a.
  • the density and mass of the foam will be chosen according to the desired effect (shock, marking).
  • the rear part 4a of the projectile comprises a peripheral bead 19 which constitutes a belt intended to take the stripes of the tube of the weapon (not represented) and to ensure both the rotational drive of the projectile 4 and the propulsive gas seal, in the barrel of the weapon, during firing.
  • An O-ring 26 is positioned on the rear part 4a of the projectile, in a first groove 27 behind the bead 19. Moreover, a second groove 28 is arranged on the rear portion 4a, behind the O-ring 26. The second groove 28 is deeper than the first groove 27.
  • the seal 26 is intended to provide a seal between the inside and the outside of the case 2 (mainly with respect to moisture).
  • the seal also provides a low pressure seal during the projectile advance into the tube, just before the engagement of the bead 19 in the scratches of the weapon.
  • the second groove 28 is intended to receive the O-ring 26 when the projectile 4 is engaged in the tube. It is the friction between the seal 26 and the barrel of the weapon which push back the seal 26, make it leave the first groove 27 and position it in the second groove 28. Once in the second groove 28, the seal 26 is no longer in contact with the tube and does not interfere with the advance of the projectile. Such an arrangement makes it possible to reduce the friction transmitted to the projectile as it advances into the barrel of the weapon.
  • the belt 19 When the projectile 4 is screwed into the case 2, the belt 19 also constitutes an abutment that bears against the front end of the shrink 2a of the case.
  • the rear part 4a of the projectile has a frustoconical shape 4c.
  • the length of this frustoconical portion as well as the overall mass of the projectile 4 and the positioning of the center of gravity of the projectile are calculated so that the projectile can be gyrostabilized during firing and has a stable trajectory.
  • the figure 2 shows the projectile 4 alone, once separated from the tube 16.
  • the rear part 4a of the projectile comprises an empty volume 21 which corresponds to the part of the low pressure chamber 16b which extended beyond the breaking primer 17.
  • This volume 21 makes it possible to reduce the aerodynamic braking on the trajectory following the classic phenomenon of reduction of bottom drag.
  • the case is placed in the chamber of a conventional weapon with the appropriate caliber.
  • the pressure of the gases develops in the high pressure chamber 6 and the gases pass through the gate 12 to fill the intermediate chamber 11.
  • the gate 12 maintains the powder grains of the charge 8 inside the high pressure chamber 6.
  • the pressure in the intermediate chamber 11 increases rapidly to a preset pressure (of the order of 1 megapascal) at which the lid 15 bursts.
  • the gases then leave the intermediate chamber 11 via the nozzle 14 to come to relax in the low pressure chamber 16b formed by the inside of the tube 16.
  • the rise of the pressure in the low pressure chamber 16b is progressive.
  • the rupture primer 17 breaks, thus releasing the projectile 4.
  • the latter then moves in the tube of the weapon, which has the effect of to increase the volume available for the propellant gases which follow the projectile in the barrel of the weapon and which also spread in the volume inside the case 16 and surrounding it.
  • the pressure of the gases decreases but this decrease remains progressive because the high pressure chamber 6 continues to supply the low pressure chamber 16b with gas through the intermediate chamber 11 and the nozzle 14.
  • the speed obtained is of the order of 60 to 100 m / s for a projectile of 25mm caliber having a mass of 50 to 20 grams, the maximum speed being obtained for the projectile of 20 grams and the minimum speed for the projectile of 50 grams.
  • the fastening of the projectile 4 and the case 2 is simplified since it is achieved by simply screwing the tube 16 on the intermediate part 13. No crimping of the case is no longer necessary. Such crimping would also have been difficult to achieve on a plastic projectile body, the crimping force may damage the projectile.
  • the speed of the projectile is easy to control. It can indeed be modulated by varying the value of the internal volume of the low pressure chamber 16b.
  • a munition adapted to another barrel size, for example a caliber of between 20 mm and 50 mm.
  • the architecture will be adapted to the caliber by varying the volume of the low-pressure chamber 16b which is produced, thus on the single geometry of the tube 16, and of course also adapting the necessary volume of propellant powder.
  • a munition whose projectile 4 carries a spongy front part impregnated with a marking dye or a munition whose front part of the body is hollow and contains a tear gas material.
  • the figure 3a shows for example a munition in which the tube 16 has a front end carrying a thread 22 which engages in a tapping 23 made on an internal cylindrical wall of the empty space 21 carried by the rear part 4a of the projectile 4.
  • the rupture primer 17 is in the form of a circular groove.
  • Such an embodiment makes it possible to use different materials to produce the tube 16 and the projectile 4. For example a plastics material more resistant to the tube 16 than to the projectile 4 (or having different mechanical characteristics such as density) .
  • FIG. figure 3b To facilitate the screwing and unscrewing of the tube 16 and the projectile 4, it is possible, as shown in FIG. figure 3b to provide a metal ring 24 which is crimped to the rear of the projectile 4. This ring carries the tapping 23 which receives the threaded end 22 of the tube 16. The mass of the ring will of course be reduced to maintain the non-lethal character of the projectile.
  • the rear part 4a of the projectile may be overmolded on the ring 24.
  • the threading itself may alternatively act as a rupture primer between the tube 16 and the projectile 4.
  • the figure 3c shows another embodiment in which the tube 16 has at its front end two cylindrical flanges 25 which are shearable. These flanges are embedded in the material of the rear part 4a of the projectile 4. It may for example overmould this part of the projectile on the front end of the tube 16.
  • the number and width of the flanges 25 will be chosen such that this mechanical connection can be broken for a given pressure level in the chamber 16b.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)

Abstract

The munition (1) has a metal case (2) incorporating a propulsive housing (3) that contains propellant powder (8). A projectile (4) is secured to the case by a tube (16) that extends a rear portion (4a) of the projectile. The tube is coaxial to the case and fixed on the propulsive housing at an outlet orifice of propellant gases, where pressure of gases from the propulsive housing is released during shooting inside the tube. The tube has an annular rupture initiation point (17) that is broken by the effect of the pressure of gases during shooting to release the projectile. The tube is made of plastic or composite material.

Description

Le domaine technique de l'invention est celui des munitions non létales.The technical field of the invention is that of non-lethal munitions.

Les munitions non létales comprennent généralement un projectile sans effet létal qui est solidaire d'un étui renfermant une charge propulsive.Non-lethal ammunition generally includes a non-lethal projectile that is integral with a propellant charge holster.

Les brevets US2007/0151473 et US2005/0268808 décrivent de telles munitions non létales.Licences US2007 / 0151473 and US2005 / 0268808 describe such non-lethal munitions.

L'absence d'effet létal résulte de la combinaison d'un projectile non perforant (le plus souvent en mousse ou en caoutchouc) et d'un système propulsif assurant une vitesse réduite lors du tir.The absence of lethal effect results from the combination of a non-perforating projectile (usually foam or rubber) and a propulsion system providing a reduced speed during firing.

Les brevets précédemment cités décrivent des munitions de 40mm pour lance grenade. Ces munitions comportent une charge propulsive qui est disposée dans un boîtier propulsif arrière solidaire de l'étui. Ce boîtier délimite une chambre haute pression qui communique avec un volume interne à l'étui par un orifice calibré. Le volume interne de l'étui constitue ce que l'on appelle la chambre basse pression.The aforementioned patents describe 40mm ammunition for grenade launcher. These ammunition comprise a propellant charge which is disposed in a rear propulsion case integral with the case. This housing delimits a high pressure chamber which communicates with an internal volume to the case by a calibrated orifice. The internal volume of the case is what is called the low pressure chamber.

La détente des gaz propulsifs au travers de l'orifice et la montée progressive de la pression dans l'intérieur de la chambre basse pression (intérieur de l'étui) assure une vitesse de tir réduite pour le projectile.The expansion of the propellant gases through the orifice and the gradual rise of the pressure in the interior of the low pressure chamber (interior of the case) ensures a reduced speed of fire for the projectile.

Ces munitions présentent cependant encore des inconvénients.These ammunition, however, still have disadvantages.

Le projectile est serti au niveau d'une embouchure de l'étui. Il est désolidarisé de ce dernier lorsque la pression atteint un niveau minimum qui dépend à la fois de la quantité de poudre et du volume de la chambre basse pression.The projectile is crimped at a mouth of the case. It is separated from the latter when the pressure reaches a minimum level which depends both on the amount of powder and the volume of the low pressure chamber.

L'effort de dessertissage peut varier d'une munition à l'autre conduisant à des dispersions des caractéristiques de vitesse de tir. Ceci est particulièrement gênant pour un projectile qui doit être non létal.The decoupling effort may vary from one ammunition to another leading to dispersions of shooting speed characteristics. This is particularly troublesome for a projectile that must be non-lethal.

Par ailleurs la chambre basse pression est délimitée par l'arrière du projectile. Une modification de la géométrie du projectile va influer sur sa masse et ses caractéristiques balistiques, qui conditionnent aussi en partie son caractère non létal.In addition, the low pressure chamber is delimited by the rear of the projectile. A modification of the geometry of the projectile will affect its mass and its ballistic characteristics, which also partly condition its non-lethal character.

Il est donc difficile d'adapter ou de moduler les caractéristiques de montée en pression dans la chambre basse pression pour un calibre donné.It is therefore difficult to adapt or modulate the pressure rise characteristics in the low pressure chamber for a given caliber.

Une réduction du volume de la chambre basse pression conduira à un allongement du projectile donc à un alourdissement de ce dernier, ce qui va à l'encontre de l'effet non létal recherché.A reduction in the volume of the low pressure chamber will lead to an extension of the projectile and therefore to a heavier of the latter, which goes against the desired non-lethal effect.

Ceci est encore plus délicat à réaliser lorsqu'on cherche à définir une munition non létale pour un calibre inhabituel comme celui des canons dits de moyen calibre (compris entre 20mm et 50 mm). Ces canons tirent généralement des projectiles à haute vitesse (de l'ordre de 1000 mètres par seconde), ce qui est bien supérieur aux vitesses atteintes avec les lance-grenades de 40 mm (vitesse de l'ordre de 80 à 120 m/s).This is even more difficult to achieve when trying to define a non-lethal ammunition for an unusual caliber such as the so-called medium caliber guns (between 20mm and 50 mm). These guns usually fire projectiles at high speeds (around 1000 meters per second), which is much higher than the speeds achieved with 40 mm grenade launchers (speed of the order of 80 to 120 m / s ).

Ces canons obligent à mettre en oeuvre des étuis standards dont le volume est relativement important pour la faible quantité de poudre requise au tir non létal.These guns require the use of standard cases whose volume is relatively important for the small amount of powder required for non-lethal shooting.

L'invention a pour but de proposer une architecture de munition permettant de pallier de tels inconvénients.The object of the invention is to propose an ammunition architecture that makes it possible to overcome such disadvantages.

La munition selon l'invention permet ainsi de maîtriser la vitesse de tir du projectile malgré la présence d'un étui ayant des dimensions importantes qui sont imposées par le calibre de l'arme.The munition according to the invention thus makes it possible to control the speed of firing of the projectile despite the presence of a holster having significant dimensions which are imposed by the caliber of the weapon.

La munition selon l'invention permet également de faciliter le montage du projectile sur l'étui sans que ce montage ne vienne nuire à la reproductibilité des caractéristiques de vitesse de tir du projectile.The ammunition according to the invention also makes it easier to mount the projectile on the case without this assembly adversely affecting the reproducibility of the firing speed characteristics of the projectile.

Ainsi l'invention a pour objet une munition non létale comprenant un étui incorporant un boîtier propulsif, qui renferme une charge propulsive, et un projectile solidaire de l'étui, munition caractérisée en ce que le projectile est rendu solidaire de l'étui par l'intermédiaire d'un tube prolongeant une partie arrière du projectile, tube coaxial à l'étui et fixé sur le boîtier propulsif au niveau d'un orifice de sortie des gaz propulsifs, la pression des gaz issus du boîtier propulsif étant libérée lors du tir à l'intérieur du tube.Thus the invention relates to a non-lethal munition comprising a case incorporating a propellant housing, which encloses a propellant charge, and a projectile integral with the case, ammunition characterized in that the projectile is secured to the case by means of a tube extending a rear part of the projectile, coaxial tube to the case and attached to the propulsion unit at a level of outlet orifice of the propellant gases, the pressure of the gases from the propulsion unit being released when firing inside the tube.

Selon un mode de réalisation, le tube pourra comporter au moins une amorce de rupture annulaire destinée à se rompre par l'effet de la pression des gaz lors du tir pour libérer le projectile.According to one embodiment, the tube may comprise at least one annular rupture primer intended to break by the effect of the gas pressure during firing to release the projectile.

Avantageusement, le tube pourra être formé d'une seule pièce avec la partie arrière du projectile.Advantageously, the tube may be formed in one piece with the rear part of the projectile.

Le tube pourra être réalisé en une matière plastique ou composite.The tube may be made of a plastic or composite material.

Selon une autre caractéristique de l'invention, le boîtier propulsif comporte une chambre haute pression renfermant une poudre propulsive et disposée à distance d'un composant d'allumage, la chambre haute pression étant séparée d'une chambre intermédiaire par une grille et la chambre intermédiaire communicant avec l'intérieur du tube par l'intermédiaire d'une tuyère.According to another characteristic of the invention, the propulsion unit comprises a high pressure chamber containing a propellant powder and disposed at a distance from an ignition component, the high pressure chamber being separated from an intermediate chamber by a grid and the chamber intermediate communicating with the interior of the tube via a nozzle.

La tuyère pourra comprendre un col suivi d'une partie conique comportant un insert permettant de maintenir un opercule obturant la chambre intermédiaire.The nozzle may comprise a neck followed by a conical portion comprising an insert for holding a lid closing the intermediate chamber.

Le projectile pourra comporter une partie avant en mousse compressible.The projectile may include a front portion of compressible foam.

La partie arrière du projectile pourra comporter un bourrelet périphérique constituant une ceinture, une première gorge en arrière du bourrelet et recevant un joint torique et une deuxième gorge en arrière de la première gorge et ayant une profondeur supérieure à celle de la première gorge.The rear part of the projectile may comprise a peripheral bead constituting a belt, a first groove behind the bead and receiving an O-ring and a second groove behind the first groove and having a depth greater than that of the first groove.

Le calibre du projectile pourra être compris entre 20mm et 50 mm.The caliber of the projectile may be between 20 mm and 50 mm.

L'invention sera mieux comprise à la lecture de la description qui va suivre de modes particuliers de réalisation, description faite en référence aux dessins annexés et dans lesquels :

  • la figure 1 est une vue en coupe longitudinale d'une munition selon un mode de réalisation de l'invention,
  • la figure 2 montre le projectile suivant le mode de réalisation de la figure 1 et représenté seul après tir,
  • les figures 3a, 3b et 3c représentent de façon partielle trois variantes de réalisation de la munition selon l'invention.
The invention will be better understood on reading the following description of particular embodiments, a description given with reference to the accompanying drawings and in which:
  • the figure 1 is a longitudinal sectional view of a munition according to one embodiment of the invention,
  • the figure 2 shows the projectile according to the embodiment of the figure 1 and represented alone after shooting,
  • the figures 3a , 3b and 3c represent partially three embodiments of the ammunition according to the invention.

La figure 1 montre une munition 1 comprenant un étui 2 qui incorpore à sa partie arrière un boîtier propulsif 3 et qui porte à sa partie avant un projectile 4.The figure 1 shows a munition 1 comprising a case 2 which incorporates at its rear part a propulsion unit 3 and which carries at its front part a projectile 4.

L'étui 2 est un étui métallique réalisé en acier ou en laiton et qui est adapté au calibre de l'arme destinée à tirer le projectile.The case 2 is a metal case made of steel or brass and which is adapted to the caliber of the weapon intended to fire the projectile.

L'étui 2 représenté sur la figure est un étui de calibre 25 mm qui comporte à sa partie avant un rétreint 2a qui entoure le projectile 4 et à sa partie arrière un culot 2b qui porte une gorge 2c permettant, après le tir de la munition, l'extraction de l'étui 2 hors de la chambre d'une arme (non représentée).The case 2 represented in the figure is a case of 25 mm caliber which comprises at its front part a shrink 2a which surrounds the projectile 4 and at its rear a base 2b which carries a groove 2c allowing, after the firing of the ammunition , extracting the case 2 from the chamber of a weapon (not shown).

Le boîtier propulsif 3 comporte une partie filetée 3a qui est vissée dans le culot 2b de l'étui. Il renferme à sa partie arrière un composant d'allumage 5, tel un inflammateur, qui est relié à une chambre haute pression 6 par un canal axial 7.The propulsion casing 3 comprises a threaded portion 3a which is screwed into the base 2b of the casing. It contains at its rear part an ignition component 5, such as an igniter, which is connected to a high pressure chamber 6 by an axial channel 7.

La chambre haute pression 6 renferme une poudre propulsive 8 qui est ici une poudre en grains classique mise en oeuvre habituellement pour les munitions de moyen calibre. Par exemple une poudre simple base B7T. Cette poudre est disposée à distance du composant d'allumage 5. Une rondelle de calage 9 est interposée entre le fond de la chambre haute pression 6 et la poudre 8 (cette rondelle pourrait cependant être omise). Un paillet 10 pouvant être de différents matériaux (aluminium, étain, papier, ou matière plastique) est rapporté entre la rondelle 9 et le boîtier propulsif 3. Ce paillet 10 permet d'obturer le canal axial 7.The high pressure chamber 6 contains a propellant powder 8 which is here a conventional grain powder usually used for medium caliber ammunition. For example a simple B7T base powder. This powder is disposed at a distance from the ignition component 5. A wedge washer 9 is interposed between the bottom of the upper chamber pressure 6 and the powder 8 (this washer could however be omitted). A straw 10 which can be of different materials (aluminum, tin, paper, or plastic material) is attached between the washer 9 and the propulsion unit 3. This straw 10 makes it possible to seal the axial channel 7.

La poudre 8 est représentée sur la figure par un simple rectangle. Il est bien entendu que les grains de poudre pourront se loger aussi dans le volume interne à la rondelle 9 et seront maintenus entre le paillet 10 et une grille métallique 12 qui sépare la chambre haute pression 6 d'une chambre intermédiaire 11. Bien entendu, pour assurer le maintien des grains de la poudre 8 à l'intérieur de la chambre haute pression 6, la grille 12 a une dimension de maille qui est choisie inférieure à la taille des grains de la poudre propulsive 8.The powder 8 is represented in the figure by a simple rectangle. It is understood that the grains of powder may also be housed in the internal volume of the washer 9 and will be held between the flap 10 and a metal gate 12 which separates the high pressure chamber 6 from an intermediate chamber 11. Of course, to maintain the grains of the powder 8 inside the high-pressure chamber 6, the grid 12 has a mesh size which is chosen smaller than the size of the grains of the propellant powder 8.

La dimension de maille de la grille 12 est de l'ordre de 1 à 1,5mm pour des grains de poudre 8 ayant un diamètre de 2,2mm et une hauteur de 2,2 mm.The mesh size of the grid 12 is of the order of 1 to 1.5 mm for powder grains 8 having a diameter of 2.2 mm and a height of 2.2 mm.

Comme on le voit sur la figure 1, le boîtier propulsif 3 est prolongé à sa partie avant par une pièce intermédiaire 13 qui délimite la chambre intermédiaire 11 et qui porte une tuyère axiale 14. La tuyère comporte une partie arrière 14a formant le col de tuyère (partie ayant un profil de venturi c'est à dire un cône convergent suivi d'un cône divergent) et une partie avant conique 14b. Cette dernière est formée par un insert qui est vissé à l'intérieur de la pièce intermédiaire 13 et qui assure le maintien d'un opercule 15 obturant la tuyère 14. L'opercule 15 permet d'assurer un bon allumage de la poudre 8 en assurant un confinement des gaz contenus dans la chambre intermédiaire 11. Lorsque la pression atteint un certain niveau dans cette chambre 11, l'opercule 15 est rompu.As we see on the figure 1 , the propulsion unit 3 is extended at its front part by an intermediate piece 13 which delimits the intermediate chamber 11 and which carries an axial nozzle 14. The nozzle comprises a rear portion 14a forming the nozzle neck (part having a venturi profile c ie a convergent cone followed by a diverging cone) and a conical front portion 14b. The latter is formed by an insert which is screwed inside the intermediate piece 13 and which maintains a lid 15 closing the nozzle 14. The cap 15 ensures a good ignition of the powder 8 in ensuring the confinement of the gases contained in the intermediate chamber 11. When the pressure reaches a certain level in this chamber 11, the lid 15 is broken.

Selon une caractéristique essentielle de l'invention, le projectile 4 est rendu solidaire de l'étui 2 par l'intermédiaire d'un tube 16 qui prolonge une partie arrière 4a du projectile 4. Dans le mode de réalisation qui est décrit ici, le tube 16 est formé d'une seule pièce avec la partie arrière 4a du projectile. Le tube 16 et la partie arrière 4a du projectile sont réalisés en une matière plastique ou bien en un matériau composite.According to an essential characteristic of the invention, the projectile 4 is secured to the case 2 by via a tube 16 which extends a rear portion 4a of the projectile 4. In the embodiment which is described here, the tube 16 is formed integrally with the rear part 4a of the projectile. The tube 16 and the rear part 4a of the projectile are made of a plastic material or a composite material.

Le tube 16 comporte une amorce de rupture annulaire 17 qui est une gorge séparant la partie tubulaire 16 (destinée à rester à l'intérieur de l'étui 2 après tir) et la partie arrière 4a du projectile.The tube 16 comprises an annular rupture primer 17 which is a groove separating the tubular portion 16 (intended to remain inside the case 2 after firing) and the rear portion 4a of the projectile.

Le tube 16 est coaxial à l'étui 2 et il comporte une partie taraudée 16a qui se visse sur la pièce intermédiaire 13 prolongeant le boîtier propulsif 3. Ainsi le tube 16 coiffe la tuyère 14 de sortie des gaz propulsifs. Le volume 16b interne au tube 16 constitue une chambre basse pression à l'intérieur de laquelle la pression des gaz issus du boîtier propulsif 3 sera libérée lors du tir.The tube 16 is coaxial with the case 2 and has a threaded portion 16a which is screwed on the intermediate piece 13 extending the propulsion unit 3. Thus the tube 16 caps the nozzle 14 of the propellant gas outlet. The volume 16b internal to the tube 16 constitutes a low pressure chamber within which the pressure of the gases from the propulsion unit 3 will be released during firing.

Ce volume interne 16b s'étend axialement à l'intérieur de la partie arrière 4a du projectile, au-delà de l'amorce de rupture 17.This internal volume 16b extends axially inside the rear part 4a of the projectile, beyond the breaking primer 17.

L'amorce de rupture 17 est destinée à se rompre par l'effet de la pression des gaz s'exerçant lors du tir dans la chambre 16b, libérant ainsi le projectile 4.The rupture primer 17 is intended to break by the effect of the pressure of the gases exerted during the firing in the chamber 16b, thus releasing the projectile 4.

Le projectile 4 qui est représenté à la figure 1 comporte une partie avant 4b en mousse compressible qui se loge dans un alésage 18 interne à la partie arrière 4a du projectile. La mousse 4b est collée à la partie arrière 4a. La densité et la masse de la mousse seront choisies en fonction de l'effet recherché (choc, marquage).The projectile 4 which is represented at figure 1 comprises a front portion 4b compressible foam which is housed in an internal bore 18 to the rear part 4a of the projectile. The foam 4b is bonded to the rear portion 4a. The density and mass of the foam will be chosen according to the desired effect (shock, marking).

Comme on le voit sur la figure 1, la partie arrière 4a du projectile comporte un bourrelet périphérique 19 qui constitue une ceinture destinée à prendre les rayures du tube de l'arme (non représenté) et à assurer à la fois l'entraînement en rotation du projectile 4 et l'étanchéité aux gaz propulsif, dans le tube de l'arme, lors du tir.As we see on the figure 1 , the rear part 4a of the projectile comprises a peripheral bead 19 which constitutes a belt intended to take the stripes of the tube of the weapon (not represented) and to ensure both the rotational drive of the projectile 4 and the propulsive gas seal, in the barrel of the weapon, during firing.

Un joint torique 26 est positionné sur la partie arrière 4a du projectile, dans une première gorge 27 en arrière du bourrelet 19. Par ailleurs une deuxième gorge 28 est aménagée sur la partie arrière 4a, en arrière du joint torique 26. La deuxième gorge 28 est plus profonde que la première gorge 27. Le joint 26 est destiné à assurer une étanchéité entre l'intérieur et l'extérieur de l'étui 2 (principalement vis à vis de l'humidité).An O-ring 26 is positioned on the rear part 4a of the projectile, in a first groove 27 behind the bead 19. Moreover, a second groove 28 is arranged on the rear portion 4a, behind the O-ring 26. The second groove 28 is deeper than the first groove 27. The seal 26 is intended to provide a seal between the inside and the outside of the case 2 (mainly with respect to moisture).

Par ailleurs le joint assure aussi une étanchéité basse pression lors de l'avancée du projectile dans le tube, juste avant l'engagement du bourrelet 19 dans les rayures de l'arme.Furthermore the seal also provides a low pressure seal during the projectile advance into the tube, just before the engagement of the bead 19 in the scratches of the weapon.

La deuxième gorge 28 est destinée à recevoir le joint torique 26 lorsque le projectile 4 est engagé dans le tube. Ce sont les frottements entre le joint 26 et le tube de l'arme qui font reculer le joint 26, le font sortir de la première gorge 27 et le positionnent dans la deuxième gorge 28. Une fois dans la deuxième gorge 28, le joint 26 n'est plus en contact avec le tube et ne gêne donc pas l'avance du projectile. Une telle disposition permet de réduire les frottements transmis au projectile lors de son avancée dans le tube de l'arme.The second groove 28 is intended to receive the O-ring 26 when the projectile 4 is engaged in the tube. It is the friction between the seal 26 and the barrel of the weapon which push back the seal 26, make it leave the first groove 27 and position it in the second groove 28. Once in the second groove 28, the seal 26 is no longer in contact with the tube and does not interfere with the advance of the projectile. Such an arrangement makes it possible to reduce the friction transmitted to the projectile as it advances into the barrel of the weapon.

Lors du vissage du projectile 4 dans l'étui 2, la ceinture 19 constitue aussi une butée qui vient en appui contre l'extrémité avant du rétreint 2a de l'étui.When the projectile 4 is screwed into the case 2, the belt 19 also constitutes an abutment that bears against the front end of the shrink 2a of the case.

La partie arrière 4a du projectile a une forme tronconique 4c. La longueur de cette partie tronconique ainsi que la masse globale du projectile 4 et le positionnement du centre de gravité du projectile sont calculés de telle sorte que le projectile puisse être gyrostabilisé lors du tir et qu'il ait une trajectoire stable.The rear part 4a of the projectile has a frustoconical shape 4c. The length of this frustoconical portion as well as the overall mass of the projectile 4 and the positioning of the center of gravity of the projectile are calculated so that the projectile can be gyrostabilized during firing and has a stable trajectory.

La figure 2 montre le projectile 4 seul, une fois séparé du tube 16. La partie arrière 4a du projectile comporte un volume vide 21 qui correspond à la partie de la chambre basse pression 16b qui s'étendait au-delà de l'amorce de rupture 17. Ce volume 21 permet de diminuer le freinage aérodynamique sur trajectoire suivant le phénomène classique de diminution de traînée de culot.The figure 2 shows the projectile 4 alone, once separated from the tube 16. The rear part 4a of the projectile comprises an empty volume 21 which corresponds to the part of the low pressure chamber 16b which extended beyond the breaking primer 17. This volume 21 makes it possible to reduce the aerodynamic braking on the trajectory following the classic phenomenon of reduction of bottom drag.

Le fonctionnement de la munition ainsi décrite est le suivant.The operation of the munition thus described is as follows.

L'étui est mis en place dans la chambre d'une arme classique ayant le calibre approprié.The case is placed in the chamber of a conventional weapon with the appropriate caliber.

L'action du moyen d'initiation de l'arme (percuteur ou contact électrique selon le cas) sur le composant d'allumage 5 provoque l'inflammation de la charge propulsive 8. La pression des gaz se développe dans la chambre haute pression 6 et les gaz passent au travers de la grille 12 pour remplir la chambre intermédiaire 11. La grille 12 assure le maintien des grains de poudre de la charge 8 à l'intérieur de la chambre haute pression 6. La pression dans la chambre intermédiaire 11 croît rapidement jusqu'à une pression prédéfinie (de l'ordre de 1 Mégapascal) à laquelle l'opercule 15 éclate. Les gaz sortent alors de la chambre intermédiaire 11 par la tuyère 14 pour venir se détendre dans la chambre basse pression 16b formée par l'intérieur du tube 16.The action of the means of initiation of the weapon (striker or electrical contact as the case) on the ignition component 5 causes the ignition of the propellant charge 8. The pressure of the gases develops in the high pressure chamber 6 and the gases pass through the gate 12 to fill the intermediate chamber 11. The gate 12 maintains the powder grains of the charge 8 inside the high pressure chamber 6. The pressure in the intermediate chamber 11 increases rapidly to a preset pressure (of the order of 1 megapascal) at which the lid 15 bursts. The gases then leave the intermediate chamber 11 via the nozzle 14 to come to relax in the low pressure chamber 16b formed by the inside of the tube 16.

La montée de la pression dans la chambre basse pression 16b est progressive. Lorsque le niveau de pression interne à la chambre basse pression 16b est suffisant, l'amorce de rupture 17 se brise, libérant ainsi le projectile 4. Ce dernier se déplace alors dans le tube de l'arme, ce qui a pour effet d'accroître le volume disponible pour les gaz propulsifs qui suivent le projectile dans le tube de l'arme et qui se répandent aussi dans le volume 20 interne à l'étui 16 et entourant ce dernier.The rise of the pressure in the low pressure chamber 16b is progressive. When the level of pressure inside the low pressure chamber 16b is sufficient, the rupture primer 17 breaks, thus releasing the projectile 4. The latter then moves in the tube of the weapon, which has the effect of to increase the volume available for the propellant gases which follow the projectile in the barrel of the weapon and which also spread in the volume inside the case 16 and surrounding it.

La pression des gaz décroit mais cette décroissance reste progressive car la chambre haute pression 6 continue à alimenter la chambre basse pression 16b en gaz au travers de la chambre intermédiaire 11 et de la tuyère 14.The pressure of the gases decreases but this decrease remains progressive because the high pressure chamber 6 continues to supply the low pressure chamber 16b with gas through the intermediate chamber 11 and the nozzle 14.

La vitesse obtenue est de l'ordre de 60 à 100 m/s pour un projectile de calibre 25mm ayant une masse de 50 à 20 grammes, la vitesse maximale étant obtenue pour le projectile de 20 grammes et la vitesse minimale pour le projectile de 50 grammes.The speed obtained is of the order of 60 to 100 m / s for a projectile of 25mm caliber having a mass of 50 to 20 grams, the maximum speed being obtained for the projectile of 20 grams and the minimum speed for the projectile of 50 grams.

Ces performances de vitesse sont obtenues avec une masse de poudre d'environ 0,5 grammes. Elles sont à comparer avec les vitesses obtenues avec un projectile de 25mm classique : vitesse 1000 m/s pour une masse de poudre de 88 grammes contenue dans un étui 2 de même dimensions que celui utilisé par l'invention.These speed performances are obtained with a powder mass of about 0.5 grams. They are to be compared with the speeds obtained with a conventional 25mm projectile: speed 1000 m / s for a powder mass of 88 grams contained in a case 2 of the same dimensions as that used by the invention.

Grâce à l'invention la solidarisation du projectile 4 et de l'étui 2 est simplifiée puisqu'elle se réalise par simple vissage du tube 16 sur la pièce intermédiaire 13. Aucun sertissage de l'étui n'est plus nécessaire. Un tel sertissage aurait par ailleurs été difficile à réaliser sur un corps de projectile en matière plastique, l'effort de sertissage risquant de détériorer le projectile.Thanks to the invention the fastening of the projectile 4 and the case 2 is simplified since it is achieved by simply screwing the tube 16 on the intermediate part 13. No crimping of the case is no longer necessary. Such crimping would also have been difficult to achieve on a plastic projectile body, the crimping force may damage the projectile.

Grâce à l'invention la vitesse du projectile est facile à maîtriser. Elle peut en effet être modulée en jouant sur la valeur du volume interne de la chambre basse pression 16b.Thanks to the invention, the speed of the projectile is easy to control. It can indeed be modulated by varying the value of the internal volume of the low pressure chamber 16b.

Il est ainsi facile de définir une munition adaptée à un autre calibre de canon, par exemple un calibre compris entre 20mm et 50 mm.It is thus easy to define a munition adapted to another barrel size, for example a caliber of between 20 mm and 50 mm.

On adaptera l'architecture au calibre en jouant sur le volume de la chambre basse pression 16b qui est réalisée, donc sur la seule géométrie du tube 16, et en adaptant également bien sûr le volume de poudre propulsive nécessaire.The architecture will be adapted to the caliber by varying the volume of the low-pressure chamber 16b which is produced, thus on the single geometry of the tube 16, and of course also adapting the necessary volume of propellant powder.

Il est possible de définir une munition selon l'invention dans laquelle le projectile est de structure différente.It is possible to define a munition according to the invention in which the projectile is of different structure.

Par exemple une munition dont le projectile 4 porte une partie avant spongieuse imprégnée d'un colorant de marquage, ou encore une munition dont la partie avant du corps est creuse et renferme un matériau lacrymogène.For example, a munition whose projectile 4 carries a spongy front part impregnated with a marking dye, or a munition whose front part of the body is hollow and contains a tear gas material.

Il est également possible de définir une munition dans laquelle le tube n'est pas formé d'une seule pièce avec l'arrière du projectile.It is also possible to define a munition in which the tube is not formed in one piece with the rear of the projectile.

La figure 3a montre par exemple une munition dans laquelle le tube 16 comporte une extrémité avant portant un filetage 22 qui s'engage dans un taraudage 23 réalisé sur une paroi cylindrique interne de l'espace vide 21 porté par la partie arrière 4a du projectile 4.The figure 3a shows for example a munition in which the tube 16 has a front end carrying a thread 22 which engages in a tapping 23 made on an internal cylindrical wall of the empty space 21 carried by the rear part 4a of the projectile 4.

L'amorce de rupture 17 est réalisée sous la forme d'une gorge circulaire. Un tel mode de réalisation permet d'utiliser des matériaux différents pour réaliser le tube 16 et le projectile 4. Par exemple une matière plastique plus résistante pour le tube 16 que pour le projectile 4 (ou ayant des caractéristiques mécaniques différentes telle que la densité).The rupture primer 17 is in the form of a circular groove. Such an embodiment makes it possible to use different materials to produce the tube 16 and the projectile 4. For example a plastics material more resistant to the tube 16 than to the projectile 4 (or having different mechanical characteristics such as density) .

Pour faciliter le vissage et le dévissage du tube 16 et du projectile 4, il est possible comme le montre la figure 3b de prévoir une bague métallique 24 qui est sertie à l'arrière du projectile 4. Cette bague porte le taraudage 23 qui reçoit l'extrémité filetée 22 du tube 16. La masse de la bague sera bien sûr réduite pour conserver le caractère non létal du projectile.To facilitate the screwing and unscrewing of the tube 16 and the projectile 4, it is possible, as shown in FIG. figure 3b to provide a metal ring 24 which is crimped to the rear of the projectile 4. This ring carries the tapping 23 which receives the threaded end 22 of the tube 16. The mass of the ring will of course be reduced to maintain the non-lethal character of the projectile.

La partie arrière 4a du projectile pourra être surmoulée sur la bague 24.The rear part 4a of the projectile may be overmolded on the ring 24.

Le filetage lui-même peut à titre de variante jouer le rôle d'amorce de rupture entre le tube 16 et le projectile 4.The threading itself may alternatively act as a rupture primer between the tube 16 and the projectile 4.

La figure 3c montre un autre mode de réalisation dans lequel le tube 16 comporte au niveau de son extrémité avant deux collerettes 25 cylindriques qui sont cisaillables. Ces collerettes sont noyées dans le matériau de la partie arrière 4a du projectile 4. On pourra par exemple surmouler cette partie du projectile sur l'extrémité avant du tube 16.The figure 3c shows another embodiment in which the tube 16 has at its front end two cylindrical flanges 25 which are shearable. These flanges are embedded in the material of the rear part 4a of the projectile 4. It may for example overmould this part of the projectile on the front end of the tube 16.

Le nombre et la largeur des collerettes 25 seront choisis de telle façon que cette liaison mécanique puisse être rompue pour un niveau de pression donnée dans la chambre 16b.The number and width of the flanges 25 will be chosen such that this mechanical connection can be broken for a given pressure level in the chamber 16b.

Claims (9)

Munition non létale (1) comprenant un étui (2) incorporant un boîtier propulsif (3), qui renferme une charge propulsive (8), et un projectile (4) solidaire de l'étui, munition caractérisée en ce que le projectile (4) est rendu solidaire de l'étui (2) par l'intermédiaire d'un tube (16) prolongeant une partie arrière (4a) du projectile (4), tube coaxial à l'étui (2) et fixé sur le boîtier propulsif (3) au niveau d'un orifice de sortie des gaz propulsifs, la pression des gaz issus du boîtier propulsif (3) étant libérée lors du tir à l'intérieur du tube (16).Non-lethal ammunition (1) comprising a case (2) incorporating a propulsion case (3), which encloses a propellant charge (8), and a projectile (4) integral with the case, ammunition characterized in that the projectile (4) ) is made integral with the case (2) by means of a tube (16) extending a rear part (4a) of the projectile (4), coaxial tube to the case (2) and fixed on the propulsion case (3) at an outlet of the propellant gases, the pressure of the gases from the propulsion unit (3) being released when firing inside the tube (16). Munition non létale selon la revendication 1, caractérisée en ce que le tube (16) comporte au moins une amorce de rupture annulaire (17) destinée à se rompre par l'effet de la pression des gaz lors du tir pour libérer le projectile (4).Non-lethal ammunition according to claim 1, characterized in that the tube (16) comprises at least one annular rupture primer (17) intended to rupture by the effect of the gas pressure during firing to release the projectile (4). ). Munition non létale selon la revendication 2, caractérisée en ce que le tube (16) est formé d'une seule pièce avec la partie arrière (4a) du projectile.Non-lethal ammunition according to claim 2, characterized in that the tube (16) is formed integrally with the rear part (4a) of the projectile. Munition non létale selon une des revendications 2 ou 3, caractérisée en ce que le tube (16) est réalisé en une matière plastique ou composite.Non-lethal ammunition according to one of claims 2 or 3, characterized in that the tube (16) is made of a plastic or composite material. Munition non létale selon une des revendications 1 à 4, caractérisée en ce que le boîtier propulsif (3) comporte une chambre haute pression renfermant une poudre propulsive (8) et disposée à distance d'un composant d'allumage (5), la chambre haute pression (6) étant séparée d'une chambre intermédiaire (11) par une grille (12) et la chambre intermédiaire (11) communicant avec l'intérieur du tube (16) par l'intermédiaire d'une tuyère (14).Non-lethal ammunition according to one of claims 1 to 4, characterized in that the propellant housing (3) comprises a high-pressure chamber containing a propellant powder (8) and disposed at a distance from an ignition component (5), the chamber high pressure (6) being separated from an intermediate chamber (11) by a grid (12) and the intermediate chamber (11) communicating with the inside of the tube (16) via a nozzle (14). Munition non létale selon la revendication 5, caractérisée en ce que la tuyère (14) comprend un col (14a) suivi d'une partie conique (14b) comportant un insert permettant de maintenir un opercule (15) obturant la chambre intermédiaire (11).Non-lethal ammunition according to claim 5, characterized in that the nozzle (14) comprises a neck (14a) followed by a conical portion (14b) comprising an insert to maintain a lid (15) closing the intermediate chamber (11). Munition non létale selon une des revendications 1 à 6, caractérisée en ce que le projectile (4) comporte une partie avant (4b) en mousse compressible.Non-lethal ammunition according to one of claims 1 to 6, characterized in that the projectile (4) has a front portion (4b) of compressible foam. Munition non létale selon une des revendications 1 à 7, caractérisée en ce que la partie arrière (4a) du projectile comporte un bourrelet périphérique (19) constituant une ceinture, une première gorge (27) en arrière du bourrelet et recevant un joint torique (26) et une deuxième gorge (28) en arrière de la première gorge (27) et ayant une profondeur supérieure à celle de la première gorge (27).Non-lethal ammunition according to one of claims 1 to 7, characterized in that the rear part (4a) of the projectile comprises a peripheral bead (19) constituting a belt, a first groove (27) behind the bead and receiving an O-ring ( 26) and a second groove (28) behind the first groove (27) and having a depth greater than that of the first groove (27). Munition non létale selon une des revendications 1 à 8, caractérisée en ce que le calibre du projectile est compris entre 20mm et 50 mm.Non-lethal ammunition according to one of claims 1 to 8, characterized in that the caliber of the projectile is between 20mm and 50mm.
EP20130151219 2012-01-26 2013-01-14 Non lethal munition Active EP2620737B1 (en)

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FR3013826A1 (en) * 2013-11-27 2015-05-29 Nexter Munitions MUNITION WITH REDUCED LETHALITY
CN108759587A (en) * 2018-05-09 2018-11-06 中国人民武装警察部队工程大学 A kind of pinking formula tear bombnoun

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DE102009048365B3 (en) * 2009-10-06 2010-10-07 Rheinmetall Waffe Munition Gmbh Cartridge-type ammunition i.e. garnet ammunition, has projectile and casing that are connected over connection, where connection has membrane with breaking point or opening point opened during preset pressure in high pressure chamber

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Publication number Priority date Publication date Assignee Title
FR3013826A1 (en) * 2013-11-27 2015-05-29 Nexter Munitions MUNITION WITH REDUCED LETHALITY
CN108759587A (en) * 2018-05-09 2018-11-06 中国人民武装警察部队工程大学 A kind of pinking formula tear bombnoun

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FR2986318B1 (en) 2014-02-28
FR2986318A1 (en) 2013-08-02
ES2502767T3 (en) 2014-10-06

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