EP0267090B1 - Rifle grenade - Google Patents

Rifle grenade Download PDF

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Publication number
EP0267090B1
EP0267090B1 EP87402311A EP87402311A EP0267090B1 EP 0267090 B1 EP0267090 B1 EP 0267090B1 EP 87402311 A EP87402311 A EP 87402311A EP 87402311 A EP87402311 A EP 87402311A EP 0267090 B1 EP0267090 B1 EP 0267090B1
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EP
European Patent Office
Prior art keywords
wall
tube
charge
bullet
grenade
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP87402311A
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German (de)
French (fr)
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EP0267090A1 (en
Inventor
François Ambrosi
Jean-Pascal Guardiola
Michel Schilling
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Luchaire SA
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Luchaire SA
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Priority to AT87402311T priority Critical patent/ATE61874T1/en
Publication of EP0267090A1 publication Critical patent/EP0267090A1/en
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Publication of EP0267090B1 publication Critical patent/EP0267090B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B30/00—Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
    • F42B30/04—Rifle grenades

Definitions

  • the present invention relates to a rifle grenade comprising at one of its ends a tube intended to be threaded on the barrel of a rifle and at its other end a rocket and a head containing an explosive charge.
  • the grenade tube comprises, upstream of the rocket, a bullet trap and a booster charge of propellant powder which may be in the form of loose powder or a block, this charge of make-up being protected from external aggressions by a sealing device.
  • This sealing device consists of a cup made of a thin sheet of metal such as tin or aluminum or plastic, which covers the end of the make-up charge.
  • the bullet trap and the make-up charge are retained at the internal wall of the tube by a support which can be in the form of a disc or a square plate on which the cup made of thin metal sheet is applied. or plastic. This disc or this plate is pierced by an axial hole of diameter greater than the caliber of the rifle bullet.
  • the thin cup When fired, the thin cup is torn under the effect of the gas pressure from the rifle cartridge, and these generate the peripheral ignition of the booster charge which surrounds the bullet trap.
  • the bullet After destruction of the thin metal cup the bullet crosses the axial hole of the disc or plate and the bullet enters the bullet trap.
  • the initial speed of the grenade is determined on the one hand by the energy of the gases of the rifle cartridge and on the other hand by the pressure of the combustion gases of the booster charge.
  • This known embodiment has many drawbacks.
  • the regularity of ignition of the make-up charge depends closely on the mechanical characteristics of the cup, since the rupture of the latter is controlled by the pressure of the gases in the cartridge. Thus, if the mechanical characteristics of this cup are irregular, the ignition of the booster charge is itself irregular, which correlatively affects the effectiveness of the grenade.
  • the regularity of ignition of the make-up charge can be affected by the presence of water or impurities (mud, sand) in the grenade tube. In fact, during firing, this water or these impurities are propelled into the combustion chamber and can thus disturb the combustion of the make-up charge.
  • water or impurities mud, sand
  • BE-A-827 664 discloses in particular a rifle grenade according to the preamble of claim 1 and comprising at one of its ends a tube intended to be threaded on the barrel of a rifle and at its other end a rocket and a head containing an explosive charge.
  • the tube comprises, upstream of the rocket, a bullet trap and a booster charge of propellant powder protected from external aggressions by a sealed wall. This make-up charge is located downstream of the aforementioned wall and has an axial recess in which the bullet trap is located.
  • This grenade has the drawbacks mentioned above.
  • the object of the present invention is to remedy the drawbacks of the embodiments described above, by creating a launching tube whose implementation is simpler and whose operation is safer and more reliable than those of the abovementioned embodiments.
  • the grenade is characterized in that the sealed wall is made in one piece with a tubular element of said tube, this wall having an axial cavity determining a reduction in the thickness of this wall sufficient for the bullet fired by the rifle can pierce this wall without tearing it off.
  • this sealed wall is made in one piece with the entire tube.
  • the invention also makes it possible to eliminate the risks of accidental damage to this sealed wall and makes any sabotage more complex.
  • the orifice which allows the ignition of the make-up powder by the gases of the rifle cartridge is produced by the bullet and not by the pressure of these gases, which has the following advantages:
  • the ignition of the booster charge is not influenced by the presence of water, sand or mud in the pomegranate tune
  • the sealed wall made in one piece with an element of the tube or with the whole of the tube increases the rigidity of the latter and ensures better containment of the make-up charge.
  • the thickness of the cylindrical wall of the tube can be reduced, which makes it possible to lighten this tube and to reduce its cost.
  • a person skilled in the art could fear that the design of a tight wall in one piece with the tube capable of being traversed by the bullet would cause the bursting of this wall and the projection of fragments backwards which could injure the shooter.
  • the axial cavity formed in the sealed wall is located on the face of this wall opposite to the face receiving the ball.
  • This arrangement makes the cavity more accessible and therefore easier to produce, for example by milling the pre-rated wall.
  • the face of the sealed wall which is opposite to the cavity remains flat and smooth, so that it limits the possibilities of retaining water, mud or other impurities.
  • the cavity formed in the wall has a flared section, for example a section in an arc of a circle or triangular, so that the point of smallest thickness is located on the axis of the tube and that the thickness of the wall gradually increases towards the outside of this axis.
  • This arrangement allows the ball to pierce in the wall a hole of regular shape without risk of uncontrolled bursting of the entire sealed wall.
  • FIG. 1 is a view in partial longitudinal section of a grenade according to the invention
  • FIG. 2 is a view in longitudinal section on an enlarged scale of the part of the tube comprising the sealed wall
  • Figure 3 is a view similar to Figure 2 showing the wall pierced immediately after the passage of the ball
  • FIG. 4 is a sectional view along the plane IV-IV of Figure 2.
  • the rifle grenade comprises at one of its ends a metal tube 1 intended to be threaded on the barrel of a rifle 2 (shown in dotted lines) and at its other end a rocket 3 and a head 4 containing an explosive charge 5.
  • the tube 1 comprises, upstream of the rocket 3, a bullet trap 6 and an auxiliary charge 7 of propellant powder in the form of a block having an axial recess 8.
  • the rear end of the tube 1 carries a tail unit 9.
  • the rocket 3, the head 4, the explosive charge 5, the bullet trap 6 are elements known in themselves, which it is therefore not necessary to describe here. The same is true of their method of assembly.
  • the face 7a of the make-up charge block 7 opposite the explosive head 4 is (see also FIG. 2) separated from the rear end of the tube 1 by a sealed wall 10.
  • the sealed wall 10 is made in one piece with the rest of the metal tube 1.
  • this wall 10 has an axial cavity 11 determining a reduction in the thickness of this wall, sufficient for the bullet fired by the powerful rifle pierces this wall 10 without tearing it off, as it will be explained in more detail later.
  • the axial cavity 11 is located on the face 10a of the wall 10 adjacent to the block 7 of additional charge and is therefore opposite the face receiving the ball.
  • This cavity 11 has a flared section, for example in an arc, centered on the axis of the tube 1, as indicated in FIG. 2.
  • This cavity 11 can also be conical. Plan view (see Figure 4), the cavity 11 is circular but may have a shape not of revolution.
  • the cavity 11 has a diameter substantially equal to or slightly greater than the caliber of the bullet.
  • the face 10a of the sealed wall 10 adjacent to the make-up charge block 7 is connected to the internal face 1a of the tube 1 by a fillet 10b.
  • the grenade tube according to the invention can be easily manufactured from a preform molded or forged from metal or molded from composite plastic or from a solid bar of sufficiently resistant light alloy. In the same way it can be made of composite with an insert integrating the wall.
  • the thickness of the wall 10 of the tube 1 must be sufficient to withstand the impact of the bullet. In other words, the ball must be able to pierce the wall opposite the cavity 11 without tearing off the latter.
  • the minimum thickness of the wall 10 in line with the cavity 11 is of the order of 0.5 mm.
  • the above-mentioned thicknesses can vary depending on the nature of the alloy used.
  • the wall 10 provides greater rigidity to the tube 1 than in the case of known embodiments, so that the thickness of the side wall of the tube 1 can be reduced, which makes it possible to lighten the latter.
  • the bullet 16 When the bullet 16 is fired, the latter pierces a hole 12 (see FIG. 3) in the zone of reduced thickness adjacent to the cavity 11, without tearing off the rest of the wall 10 and thus enters the bullet trap 6 , deforms it, creating a space between the bullet trap and the wall.
  • the propellant gases thereof penetrate into the interior cavity of the booster charge block 7 and ensure that the latter is ignited.
  • the pressure of the combustion gases of this powder propels the grenade at a predetermined speed and cocks the rocket.
  • the hole 12 is formed not by the pressure of the propellants of the bullet, but by the bullet itself, these propellants are not likely to propel into the internal cavity of the make-up charge block 7 the humidity or other impurity possibly contained inside the tube 1, which would risk inhibiting the combustion of the block 7 of additional charge and which is retained by the part of the partition 10 surrounding the hole 12.
  • the cavity 11 is adjacent to the make-up charge block 7 and therefore located in a sealed chamber, this cavity 11 is not likely to retain moisture or other impurities liable to affect the operation of the grenade.
  • the wall 10 is in one piece with the rest of the tube 1, this wall is not likely to be damaged during assembly of the grenade, so that the latter has safety and security characteristics. reliability significantly improved compared to those of known embodiments.
  • the wall 10 is part of a tubular insert 13 in which is housed the additional charge 7.
  • This insert 13 can be of a material different from the tube 1, such as a composite plastic material loaded with fibers, or conversely the rest of the tube can be made of composite plastic material and the insert 13 metal.
  • the wall 10 is part of a tubular member 14 attached to the rest of the tube 1, for example by screwing.
  • the wall 10 forms part of the rear part of the tube 1 to which is attached, for example by screwing, the part 15 of the tube which contains the make-up charge 7.
  • the shape of the cavity 11 can be different from that shown, provided that the latter provides the wall 10 with an area of axial weakness which can be pierced by the bullet, without tearing away from the rest of the wall.

Abstract

A rifle grenade comprises, at one end, a tube designed to be fitted to the barrel of a gun and, at the other end, a fuse and a head enclosing an explosive charge, the said tube comprising, upstream of the fuse, a bullet-trap and a booster-charge of propellant powder protected from external influences by a sealed wall. The said sealed wall is integral with a tubular element of the said tube and comprises an axial cavity defining a reduction in the thickness of the wall sufficient to ensure that the bullet shot by the gun shall pierce the wall without tearing it. The purpose is to increase the operational safety of rifle grenade.

Description

La prèsente invention concerne une grenade à fusil comprenant à l'une de ses extrémités un tube destiné à être enfile sur le canon d'un fusil et à son autre extrémité une fusée et une tête renfermant une charge explosive.The present invention relates to a rifle grenade comprising at one of its ends a tube intended to be threaded on the barrel of a rifle and at its other end a rocket and a head containing an explosive charge.

Dans les réalisation connues, le tube de la grenade comporte en amont de la fusée, un piège à balle et une charge d'appoint de poudre propulsive pouvant se présenter sous la forme de poudre en vrac ou d'un bloc, cette charge d'appoint étant protégée des agressions extérieures par un dispositif d'étanchéité.In known embodiments, the grenade tube comprises, upstream of the rocket, a bullet trap and a booster charge of propellant powder which may be in the form of loose powder or a block, this charge of make-up being protected from external aggressions by a sealing device.

Ce dispositif d'étanchéité est constitué par une coupelle réalisée dans une mince feuille en métal tel que l'étain ou l'aluminium ou en matiére plastique, qui coiffe l'extrémité de la charge d'apoint. Le piège à balle et la charge d'appoint sont retenus à la paroi interne du tube par un appui pouvant se présenter sous la forme d'un disque ou d'une plaquette carrée sur lequel vient s'appliquer la coupelle en feuille mince de métal ou de matière plastique. Ce disque ou cette plaquette est percé par un trou axial de diamètre supérieur au calibre de la balle de fusil.This sealing device consists of a cup made of a thin sheet of metal such as tin or aluminum or plastic, which covers the end of the make-up charge. The bullet trap and the make-up charge are retained at the internal wall of the tube by a support which can be in the form of a disc or a square plate on which the cup made of thin metal sheet is applied. or plastic. This disc or this plate is pierced by an axial hole of diameter greater than the caliber of the rifle bullet.

Lors du tir, la coupelle mince est déchirée sous l'effect de la pression de gaz de la cartouche du fusil, et ceux-ci engendrent l'allumage périphérique de la charge d'appoint qui entoure le piège à balle.When fired, the thin cup is torn under the effect of the gas pressure from the rifle cartridge, and these generate the peripheral ignition of the booster charge which surrounds the bullet trap.

Après destruction de la coupelle mince en métal la balle traverse le trou axial du disque ou de la plaque et la balle pénètre dans la piège à balle.After destruction of the thin metal cup the bullet crosses the axial hole of the disc or plate and the bullet enters the bullet trap.

La vitesse initiale de la grenade est déterminée d'une part par l'énergie des gaz de la cartouche du fusil et d'autre par la pression des gaz de combustion de la charge d'appoint.The initial speed of the grenade is determined on the one hand by the energy of the gases of the rifle cartridge and on the other hand by the pressure of the combustion gases of the booster charge.

Cette réalisation connue présente de nombreux inconvénients.This known embodiment has many drawbacks.

La plupart de ces inconvénients sont liés à la présence de ce dispositif d'étanchéité et notamment à la fragilité de la mince coupelle et à la forme de l'appui qui permet la rétention d'eau ou d'impuretés pouvant affecter la combustion régulière de la charge d'appoint.Most of these drawbacks are linked to the presence of this sealing device and in particular to the fragility of the thin cup and to the shape of the support which allows the retention of water or impurities which can affect the regular combustion of the extra charge.

D'une part, cette fragilité rend comliquée la mise en place de cette coupelle et peut entraîner des défectuosités de montage.On the one hand, this fragility makes it difficult to put this cup in place and can lead to assembly faults.

D'autre part, en raison de cetter fragilité, la coupelle risque d'être endommagée facilement d'une maniére accidentelle lors des manipulations usuelles ou intentionnelles par un saboteur.On the other hand, due to this fragility, the cup risks being easily damaged in an accidental manner during the usual or intentional manipulations by a saboteur.

Ainsi, en cas de montage, défecteux ou d'endommagement de cette coupelle, l'étanchéité de la charge d'appoint n'est plus assurée. Cette dernière étant hydrophile, sa combustion risque alors d'être inhibée par l'humidité environnante.Thus, in the event of assembly, defective or damage to this cup, the tightness of the makeup charge is no longer ensured. As the latter is hydrophilic, its combustion risks being inhibited by the surrounding humidity.

La diminution de la portée de la grenade résultant de l'inhibition de sa charge d'appoint rend cette grenade inefficace vis-à-vis de l'ennemi et les tireurs peuvant également être mis en danger.The reduction in the range of the grenade resulting from the inhibition of its additional charge makes this grenade ineffective vis-à-vis the enemy and the shooters can also be put in danger.

Par ailleurs, la régularité d'allumage de la charge d'appoint dépend étroitement des caractéristiques mécaniques de la coupelle, étant donné que la rupture de celle-ci est commandée par la pression des gaz de la cartouche. Ainsi, si les caractéristiques mécaniques de cette coupelle sont irrégulières, l'allumage de la charge d'appoint est lui-même irrégulier, ce qui affecte corrélativement l'efficacité de la grenade.Furthermore, the regularity of ignition of the make-up charge depends closely on the mechanical characteristics of the cup, since the rupture of the latter is controlled by the pressure of the gases in the cartridge. Thus, if the mechanical characteristics of this cup are irregular, the ignition of the booster charge is itself irregular, which correlatively affects the effectiveness of the grenade.

De même, la régularité d'allumage de la charge d'appoint peut être affectée par la présence d'eau ou d'impuretés (boue, sable) dans le tube de la grenade. En effet, lors du tir, cette eau ou ces impuretés sont propulsées dans la chambre de combustion et peuvent ainsi perturber la combustion de la charge d'appoint.Similarly, the regularity of ignition of the make-up charge can be affected by the presence of water or impurities (mud, sand) in the grenade tube. In fact, during firing, this water or these impurities are propelled into the combustion chamber and can thus disturb the combustion of the make-up charge.

On connaît en particulier selon le BE-A-827 664 une grenade à fusil selon le préamble de la revendication 1 et comprenant à l'une de ses extrémités un tube destiné à être enfilé sur le canon d'un fusil et à son autre extrémité une fusée et une tête renfermant une charge explosive. Le tube comporte en amont de la fusée un piège à balle et une charge d'appoint de poudre propulsive protégée des agressions extérieures par une paroi étanche. Cette charge d'appoint est située en aval de la paroi précitée et présente un évidement axial dans lequel est situé le piège à balle.BE-A-827 664 discloses in particular a rifle grenade according to the preamble of claim 1 and comprising at one of its ends a tube intended to be threaded on the barrel of a rifle and at its other end a rocket and a head containing an explosive charge. The tube comprises, upstream of the rocket, a bullet trap and a booster charge of propellant powder protected from external aggressions by a sealed wall. This make-up charge is located downstream of the aforementioned wall and has an axial recess in which the bullet trap is located.

Cette grenade présente les inconvénients évoqués ci-dessus.This grenade has the drawbacks mentioned above.

Le but de la présente invention est de remédier aux inconvénients des réalisations ci-dessus exposées, en créant un tube de lancement dont la mise en oeuvre soit plus simple et dont le fonctionnement soit plus sûr et plus fiable que ceux des réalisations précitées.The object of the present invention is to remedy the drawbacks of the embodiments described above, by creating a launching tube whose implementation is simpler and whose operation is safer and more reliable than those of the abovementioned embodiments.

Suivant l'invention la grenade est caractérisée en ce que la paroi étanche est réalisée d'une seule pièce avec un élément tubulaire dudit tube, cette paroi présentant une cavité axiale déterminant une réduction de l'épaisseur de cette paroi suffisante pour que la balle tirée par le fusil puisse percer cette paroi sans arracher celle-ci.According to the invention, the grenade is characterized in that the sealed wall is made in one piece with a tubular element of said tube, this wall having an axial cavity determining a reduction in the thickness of this wall sufficient for the bullet fired by the rifle can pierce this wall without tearing it off.

De préférence, cette paroi étanche est réalisée d'une seule pièce avec l'ensemble du tube.Preferably, this sealed wall is made in one piece with the entire tube.

Le fait que la paroi étanche soit d'une seule pièce avec un élément du tube ou avec l'ensemble du tube, simplifie considérablement le montage de la grenade et permet d'éviter les risques de montage défectueux et de détérioration de la paroi étanche encourus dans les réalisations connues.The fact that the watertight wall is in one piece with an element of the tube or with the whole of the tube, considerably simplifies the mounting of the grenade and makes it possible to avoid the risks of defective mounting and of deterioration of the watertight wall incurred in known embodiments.

Par ailleurs, l'invention permet également de supprimer les risques d'endommagement accidentel de cette paroi étanche et rend plus complexe un éventuel sabotage.Furthermore, the invention also makes it possible to eliminate the risks of accidental damage to this sealed wall and makes any sabotage more complex.

L'orifice qui permet l'allumage de la poudre d'appoint par les gaz de la cartouche du fusil est réalisé par la balle et non pas par la pression de ces gaz, ce qui présente les avantages suivants :The orifice which allows the ignition of the make-up powder by the gases of the rifle cartridge is produced by the bullet and not by the pressure of these gases, which has the following advantages:

- une plus grande régularité de l'allumage de la charge d'appoint et donc une meilleure régularité de la vitesse initiale de la grenade, ce qui permet d'améliorer sa précision,- greater regularity of ignition of the booster charge and therefore better regularity of the initial speed of the grenade, which makes it possible to improve its precision,

- l'allumage de la charge d'appoint n'est pas influencé par la présence d'eau, de sable ou de boue dans le tune de la grenade,- the ignition of the booster charge is not influenced by the presence of water, sand or mud in the pomegranate tune,

- l'allumage de la charge d'appoint n'est possible qu'après un tir de balle, de sorte que le piégeage de la grenade est pratiquement impossible.- the ignition of the booster charge is only possible after a ball is fired, so that trapping the grenade is practically impossible.

D'autre part, la paroi étanche réalisée d'une seule pièce avec un élément du tube ou avec l'ensemble du tube augmente la rigidité de ce dernier et assure un meilleur confinement de la charge d'appoint. L'épaisseur de la paroi cylindrique du tube peut être réduite, ce qui permet d'alléger ce tube et d'en réduire le coût.On the other hand, the sealed wall made in one piece with an element of the tube or with the whole of the tube increases the rigidity of the latter and ensures better containment of the make-up charge. The thickness of the cylindrical wall of the tube can be reduced, which makes it possible to lighten this tube and to reduce its cost.

L'homme du métier pouvait craindre que la conception d'une paroi étanche d'une seule pièce avec le tube susceptible d'être traversée par la balle entraînerait l'éclatement de cette paroi et la projection d'éclats vers l'arrière pouvant blesser le tireur.A person skilled in the art could fear that the design of a tight wall in one piece with the tube capable of being traversed by the bullet would cause the bursting of this wall and the projection of fragments backwards which could injure the shooter.

L'homme du métier pouvait craindre également que l'allumage de la charge d'appoint ne pourrait pas s'effectuer. En effet, on pouvait craindre que la grenade soit propulsée en avant sous l'effet du tir de la cartouche et que l'allumage d la charge d'appoint en soit différé. Le fait que l'allumage de cette charge d'appoint soit réalisé d'une manière remarquablement régulière constitue donc un triomphe d'un préjugé technique.A person skilled in the art could also fear that the ignition of the booster charge could not take place. Indeed, it was feared that the grenade would be propelled forward under the effect of the firing of the cartridge and that the ignition of the booster charge would be delayed. The fact that the ignition of this make-up charge is carried out in a remarkably regular manner therefore constitutes a triumph of a technical prejudice.

Selon une réalisation avantageuse de l'invention, la cavité axiale ménagée dans le paroi étanche est située sur la face de cette paroi opposée à la face recevant la balle.According to an advantageous embodiment of the invention, the axial cavity formed in the sealed wall is located on the face of this wall opposite to the face receiving the ball.

Cette disposition rend la cavité plus accessible donc plus facile à réaliser, par exemple par fraisage de la paroi précotée.This arrangement makes the cavity more accessible and therefore easier to produce, for example by milling the pre-rated wall.

De plus, selon cette disposition, la face de la paroi étanche qui est opposée à la cavité reste plane et lisse, de sorte qu'elle limite les possibilités de retenue d'eau, de boue ou d'autres impuretés.In addition, according to this arrangement, the face of the sealed wall which is opposite to the cavity remains flat and smooth, so that it limits the possibilities of retaining water, mud or other impurities.

Selon une version préférée de l'invention, la cavité ménagée dans la paroi a une section évasée, par exemple une section en arc de cercle ou triangulaire, de façon que le point de plus faible épaisseur soit situé sur l'axe du tube et que l'eppaisseur de la paroi augmente progressivement vers l'extérieur de cet axe.According to a preferred version of the invention, the cavity formed in the wall has a flared section, for example a section in an arc of a circle or triangular, so that the point of smallest thickness is located on the axis of the tube and that the thickness of the wall gradually increases towards the outside of this axis.

Cette disposition permet à la balle de percer dans la paroi un trou de forme régulière sans risque d'éclatement incontrôlé de la paroi étanche toute entière.This arrangement allows the ball to pierce in the wall a hole of regular shape without risk of uncontrolled bursting of the entire sealed wall.

D'autres particularités et avantages de l'invention apparaîtront encore dans la description ci-après.Other features and advantages of the invention will appear in the description below.

Aux dessins annexés, donnés à titre d'exemples non limitatifs :In the appended drawings, given by way of nonlimiting examples:

- la figure 1 est une vue en coupe longitudinale partielle d'une grenade conforme à l'invention,FIG. 1 is a view in partial longitudinal section of a grenade according to the invention,

- la figure 2 est une vue en coupe longitudinale à échelle agrandie de la partie du tube comportant la paroi étanche,FIG. 2 is a view in longitudinal section on an enlarged scale of the part of the tube comprising the sealed wall,

- la figure 3 est une vue analogue à la figure 2 montrant la paroi percée immédiatement aprés le passage de la balle,- Figure 3 is a view similar to Figure 2 showing the wall pierced immediately after the passage of the ball,

- la figure 4 est une vue en coupe selon le plan IV-IV de la figure 2.- Figure 4 is a sectional view along the plane IV-IV of Figure 2.

- les figures 5 à 7 sont des vues analogues à la figure 2 concernant des variantes.- Figures 5 to 7 are views similar to Figure 2 concerning variants.

Dans la realisation de la figure 1, la grenade à fusil comprend à l'une de ses extrémités un tube métallique 1 destiné à être enfilé sur le canon d'un fusil 2 (représenté en pointillés) et à son autre extrémité une fusée 3 et une tête 4 renfermant une charge explosive 5. Le tube 1 comporte en amont de la fusée 3 un piège à balle 6 et une charge d'appoint 7 de poudre propulsive sous forme d'un bloc présentant un évidement axial 8. L'extrémité arriére du tube 1 porte en empennage 9. La fusée 3, la tête 4, la charge explosive 5, le piège à balle 6 sont des éléments connus en eux-mêmes, qu'il n'est donc pas nécessaire de décrire ici. Il en est de même d leur mode d'assemblage.In the embodiment of FIG. 1, the rifle grenade comprises at one of its ends a metal tube 1 intended to be threaded on the barrel of a rifle 2 (shown in dotted lines) and at its other end a rocket 3 and a head 4 containing an explosive charge 5. The tube 1 comprises, upstream of the rocket 3, a bullet trap 6 and an auxiliary charge 7 of propellant powder in the form of a block having an axial recess 8. The rear end of the tube 1 carries a tail unit 9. The rocket 3, the head 4, the explosive charge 5, the bullet trap 6 are elements known in themselves, which it is therefore not necessary to describe here. The same is true of their method of assembly.

La face 7a du bloc 7 de charge d'appoint opposée a la tête explosive 4 est (voir également la figure 2) séparée de l'extrémité arrière du tube 1 par une paroi étanche 10.The face 7a of the make-up charge block 7 opposite the explosive head 4 is (see also FIG. 2) separated from the rear end of the tube 1 by a sealed wall 10.

Conformément à l'invention, la paroi étanche 10 est réalisée d'une seule pièce avec le reste du tube métallique 1. De plus, cette paroi 10 présente une cavité axiale 11 déterminant une réduction de l'épaisseur de cette paroi, suffisante pour que la balle tirée par le fusil puissde percer cette paroi 10 sans arracher celle-ci, comme on l'expliquera plus en détail plus loin.According to the invention, the sealed wall 10 is made in one piece with the rest of the metal tube 1. In addition, this wall 10 has an axial cavity 11 determining a reduction in the thickness of this wall, sufficient for the bullet fired by the powerful rifle pierces this wall 10 without tearing it off, as it will be explained in more detail later.

Dans la réalisation représentée, la cavité axiale 11 est située sur la face 10a de la paroi 10 adjacente au bloc 7 de charge d'appoint et est donc opposée à la face recevant la balle.In the embodiment shown, the axial cavity 11 is located on the face 10a of the wall 10 adjacent to the block 7 of additional charge and is therefore opposite the face receiving the ball.

Cette cavité 11 a une section évasée, par exemple en arc de cercle, centrée sur l'axe du tube 1, comme indiqué sur la figure 2. Cette cavité 11 peut également être conique. Vue en plan (voir figure 4), la cavité 11 est circulaire mais peut présenter une forme non de révolution.This cavity 11 has a flared section, for example in an arc, centered on the axis of the tube 1, as indicated in FIG. 2. This cavity 11 can also be conical. Plan view (see Figure 4), the cavity 11 is circular but may have a shape not of revolution.

Par ailleurs, la cavité 11 a un diamétre sensiblement égal ou légérement supérieur au calibre de la balle.Furthermore, the cavity 11 has a diameter substantially equal to or slightly greater than the caliber of the bullet.

Comme on le voit également sur la figure 2, la face 10a de la paroi étanche 10 adjacente au bloc 7 de charge d'appoint est raccordée à la face interne 1a du tube 1 par un congé 10b.As can also be seen in FIG. 2, the face 10a of the sealed wall 10 adjacent to the make-up charge block 7 is connected to the internal face 1a of the tube 1 by a fillet 10b.

Le tube de la grenade conforme à l'invention peut être fabriqué facilement à partir d'une ébauche moulée ou forgée en métal ou moulée en matiére plastique composite ou à partir d'un barreau massif en alliage léger suffisamment résistant. D'une même maniere il peut être réalisé en composite avec un insert intégrant la paroi.The grenade tube according to the invention can be easily manufactured from a preform molded or forged from metal or molded from composite plastic or from a solid bar of sufficiently resistant light alloy. In the same way it can be made of composite with an insert integrating the wall.

L'épaisseur de la paroi 10 du tube 1 doit être suffisante pour résister à l'impact de la balle. Autrement dit, la balle doit pouvoir percer la paroi en regard de la cavité 11 sans arracher cette derniére.The thickness of the wall 10 of the tube 1 must be sufficient to withstand the impact of the bullet. In other words, the ball must be able to pierce the wall opposite the cavity 11 without tearing off the latter.

Les essais ont montré qu'une épaisseur d'alliage léger de 1,5 mm était suffisante pour conférer à la paroi 10 une résistance suffisante à l'impact de la balle. Cette résistance est renforcée par la présence du congé annulaire 10b de raccordement entre la face 10a de la paroi 10 adjacente au bloc 7 de charge d'appoint et la face interne 1a de tube 1.Tests have shown that a light alloy thickness of 1.5 mm is sufficient to give the wall 10 sufficient resistance to the impact of the bullet. This resistance is reinforced by the presence of the annular leave 10b for connection between the face 10a of the wall 10 adjacent to the block 7 of additional load and the internal face 1a of tube 1.

L'épaisseur minimale de la paroi 10 au droit de la cavité 11 est de l'ordre de 0,5 mm. Bien entendu, les épaisseurs précitées peuv ent varier en fonction de la nature de l'alliage utilisé.The minimum thickness of the wall 10 in line with the cavity 11 is of the order of 0.5 mm. Of course, the above-mentioned thicknesses can vary depending on the nature of the alloy used.

La paroi 10 assure une plus grande rigidité au tube 1 que dans le cas des réalisations connues, de sorte que l'eppaisseur de la paroi latérale du tube 1 peut être réduite, ce qui permet d'alléger celui-ci.The wall 10 provides greater rigidity to the tube 1 than in the case of known embodiments, so that the thickness of the side wall of the tube 1 can be reduced, which makes it possible to lighten the latter.

Par ailleurs, étant donné que la paroi 10 est d'une seule piéce avec le reste du tube 1, la charge d'appoint 7 située en aval de cette paroi est parfaitement protégée à l'égard de l'humidité pouvant pénétrer à l'intérieur du tube 1.Furthermore, since the wall 10 is in one piece with the rest of the tube 1, the make-up charge 7 located downstream of this wall is perfectly protected with respect to moisture which can penetrate to the inside of tube 1.

Le fonctionnement de la grenade que l'on vient de décrire est le suivant :The operation of the grenade that has just been described is as follows:

Lors du tir de la balle 16, celle-ci perce un trou 12 (voir figure 3) dans la zone d'épaisseur réduite adjacente à la cavité 11, sans arracher le reste de la paroi 10 et pénètre ainsi dans le piège à balle 6, le déforme, créant ainsi un espace entre le piége à balle et la paroi.When the bullet 16 is fired, the latter pierces a hole 12 (see FIG. 3) in the zone of reduced thickness adjacent to the cavity 11, without tearing off the rest of the wall 10 and thus enters the bullet trap 6 , deforms it, creating a space between the bullet trap and the wall.

Après le passage de la balle 16, les gaz de propulsion de celle-ci pénètrent dans la cavité intérieure du bloc 7 de charge d'appoint et assurent la mise à feu de cette derniére. La pression des gaz de combustion de cette poudre propulse la grenade à une vitesse prédéterminée et arme la fusée.After the bullet 16 has passed, the propellant gases thereof penetrate into the interior cavity of the booster charge block 7 and ensure that the latter is ignited. The pressure of the combustion gases of this powder propels the grenade at a predetermined speed and cocks the rocket.

Etant donné que le trou 12 est formé non pas par la pression des gaz de propulsion de la balle, mais par la balle elle-même, ces gaz de propulsion ne risquent pas de propulser dans la cavité interne du bloc 7 de charge d'appoint l'humidité ou autre impureté éventuellement contenue à l'intérieur du tube 1, qui risquerait d'inhiber la combustion du bloc 7 de charge d'appoint et qui est retenue par la partie de la cloison 10 entourant le trou 12.Since the hole 12 is formed not by the pressure of the propellants of the bullet, but by the bullet itself, these propellants are not likely to propel into the internal cavity of the make-up charge block 7 the humidity or other impurity possibly contained inside the tube 1, which would risk inhibiting the combustion of the block 7 of additional charge and which is retained by the part of the partition 10 surrounding the hole 12.

Par ailleurs, étant donné que la cavité 11 est adjacente au bloc 7 de charge d'appoint et par conséquent située dans une chambre étanche, cette cavité 11 ne risque pas de retenir de l'humidité ou autres impuretés susceptibles d'altérer le fonctionnement de la grenade.Furthermore, since the cavity 11 is adjacent to the make-up charge block 7 and therefore located in a sealed chamber, this cavity 11 is not likely to retain moisture or other impurities liable to affect the operation of the grenade.

De plus, étant donné que la paroi 10 est d'une seule pièce avec le reste du tube 1, cette paroi ne risque pas d'être détériorée lors du montage de la grenade, de sorte que cette derniére présente des caractétistiques de sécurité et de fiabilité nettement améliorées par rapport à celles des réalisations connues.In addition, since the wall 10 is in one piece with the rest of the tube 1, this wall is not likely to be damaged during assembly of the grenade, so that the latter has safety and security characteristics. reliability significantly improved compared to those of known embodiments.

Dans la réalisation de la figure 5, la paroi 10 fait partie d'un insert tubulaire 13 dans lequel est logée la charge d'appoint 7. Cet insert 13 peut être d'un matériau différent du tube 1, tel qu'une matiére plastique composite chargée de fibres, ou inversement le reste du tube peut être en matiére plastique composite et l'insert 13 en métal.In the embodiment of Figure 5, the wall 10 is part of a tubular insert 13 in which is housed the additional charge 7. This insert 13 can be of a material different from the tube 1, such as a composite plastic material loaded with fibers, or conversely the rest of the tube can be made of composite plastic material and the insert 13 metal.

Dans la réalisation de la figure 6, la paroi 10 fait partie d'un élément tubulaire 14 rapporté au reste du tube 1, par exemple par vissage.In the embodiment of Figure 6, the wall 10 is part of a tubular member 14 attached to the rest of the tube 1, for example by screwing.

Dans la réalisation de la figure 7, la paroi 10 fait partie de la partie arriére du tube 1 à laquelle est rapportée, par exemple par vissage, la partie 15 du tube qui renferme la charge d'appoint 7.In the embodiment of FIG. 7, the wall 10 forms part of the rear part of the tube 1 to which is attached, for example by screwing, the part 15 of the tube which contains the make-up charge 7.

Bien entendu, l'invention n'est pas limitée aux exemples que l'on vient de décrire et on peut apporter à ceux-ci de nombreuses modifications sans sortir du cadre de l'invention.Of course, the invention is not limited to the examples which have just been described and numerous modifications can be made to them without departing from the scope of the invention.

Ainsi, la forme de la cavité 11 peut être différente de celle représentée, pourvu que celle-ci procure à la paroi 10 une zone de fragilité axiale pouvant être percée par la balle, sans arrachement du reste de la paroi.Thus, the shape of the cavity 11 can be different from that shown, provided that the latter provides the wall 10 with an area of axial weakness which can be pierced by the bullet, without tearing away from the rest of the wall.

Bien entendu, les dimensions peuvent varier selon les applications envisagées.Of course, the dimensions may vary depending on the applications envisaged.

Claims (7)

  1. Rifle grenade comprising at one of its extremities a tube (1) intended to be fitted onto the barrel of a gun and at its other extremity a fuse (3) and a head (4) enclosing an explosive charge (5) , the tube (1) comprising upstream of the fuse (3) a bullet-trap (6) and a booster-charge (7) of propellant powder protected from external influences by a sealed wall (10) the booster-charge (7) being downstream of the wall (10) and presenting an axial recess (8) in which the bullet-trap (6) is located, characterized in that the sealed wall (10) in integral with a tubular element of the said tube (1) , the wall (10) presenting an axial cavity (11) defining a reduction of the thickness of the wall sufficient to ensure that the bullet (16) shot by the gun shall pierce the wall without tearing it.
  2. Grenade according to claim 1, characterized in that the wall (10) is integral with the whole tube (1).
  3. Grenade according to one of claims 1 to 2, characterized in that the axial cavity (11) is located on the surface (10a) of the wall (10) opposite to the surface receiving the bullet.
  4. Grenade according to one of claims 1 to 3, characterized in that the cavity (11) has a widened-out section.
  5. Grenade according to one of claims 1 to 4, characterized in that the cavity (11) is circular.
  6. Grenade according to claim 5, characterized in that the diameter of the cavity (11) is substantially equal to, or slightly larger than the calibre of the bullet.
  7. Grenade according to one of claims 1 to 6, characterized in that the surface (10a) of the sealed wall (10) adjacent to the booster-charge (7) of propellant powder is connected to the internal surface (1a) of the tube (1) by a fillet (l0b)
EP87402311A 1986-10-17 1987-10-16 Rifle grenade Expired - Lifetime EP0267090B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402311T ATE61874T1 (en) 1986-10-17 1987-10-16 RIFLE GRENADE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8614437A FR2605399B1 (en) 1986-10-17 1986-10-17 SHOTGUN GRENADE
FR8614437 1986-10-17

Publications (2)

Publication Number Publication Date
EP0267090A1 EP0267090A1 (en) 1988-05-11
EP0267090B1 true EP0267090B1 (en) 1991-03-20

Family

ID=9339940

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402311A Expired - Lifetime EP0267090B1 (en) 1986-10-17 1987-10-16 Rifle grenade

Country Status (10)

Country Link
US (1) US4793259A (en)
EP (1) EP0267090B1 (en)
JP (1) JPS63153400A (en)
AT (1) ATE61874T1 (en)
BR (1) BR8705540A (en)
CA (1) CA1277527C (en)
DE (1) DE3768763D1 (en)
ES (1) ES2002604B3 (en)
FR (1) FR2605399B1 (en)
IL (1) IL84165A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8813065D0 (en) * 1988-06-02 1988-08-24 Galt Composites Ltd Bullet trap
BE1003971A3 (en) * 1990-11-14 1992-07-28 Herstal Sa Improvements shooting.
FR2685468B1 (en) * 1991-12-24 1995-04-28 Luchaire Defense Sa SOCKET TUBE FOR RIFLE WITH RIFLE THAT CAN RETAIN BALL FRAGMENTS.
US6408765B1 (en) * 1999-03-02 2002-06-25 State Of Israel-Ministry Of Defense Armament Development Authority-Rafael Door breaching device with safety adapter
US6523478B1 (en) * 2001-09-10 2003-02-25 The United States Of America As Represented By The Secretary Of The Army Rifle-launched non-lethal cargo dispenser
US6981449B2 (en) * 2003-12-22 2006-01-03 The United States Of America As Represented By The Secretary Of The Army Projectile launch assembly and method
US7526999B1 (en) * 2006-02-13 2009-05-05 Timan Bruce A Less-lethal force device
US8430029B2 (en) * 2008-01-31 2013-04-30 Bae Systems Information And Electronic Systems Integration Inc. Inertial delay fuse
US9612074B2 (en) 2013-02-20 2017-04-04 Christian Ellis Less-lethal force device impact ratio
CA3010134A1 (en) 2015-12-30 2017-07-06 Christian Ellis Less-lethal force device
CN109211030B (en) * 2018-10-19 2023-08-22 中国人民武装警察部队工程大学 Impact trigger type Cheng Fangbao grenade

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Publication number Priority date Publication date Assignee Title
DE300194C (en) *
FR1155603A (en) * 1956-07-07 1958-05-06 Hispano Suiza Sa Improvements in explosive device firing devices
BE754543A (en) * 1969-08-07 1971-02-08 Allied Res Ass Inc DEVICE FOR PROPULATING RIFLE GRENADES WITH BULLET CARTRIDGES
BE827664R (en) * 1973-09-13 1975-10-08 GRENADE LAUNCHING DEVICE
BE804791A (en) * 1973-09-13 1974-01-02 Herstal Sa GRENADE LAUNCHING DEVICE
US4013011A (en) * 1975-04-08 1977-03-22 Fabrique Nationale Herstal S.A. Throwing device for grenades
FR2368686A1 (en) * 1976-10-20 1978-05-19 France Etat Smoke generating rifle grenade - has bullet trap formed by charge itself with hole slightly smaller than bullet
FR2517424B1 (en) * 1981-11-27 1985-06-14 France Etat BALL TRAP FOR RIFLE GRENADE
US4567831A (en) * 1984-06-11 1986-02-04 The State Of Israel, Ministry Of Defence, Military Industries Bullet trap and bullet deflector in rifle grenade

Also Published As

Publication number Publication date
FR2605399A1 (en) 1988-04-22
BR8705540A (en) 1988-05-24
JPH0447240B2 (en) 1992-08-03
EP0267090A1 (en) 1988-05-11
ES2002604A4 (en) 1988-09-01
DE3768763D1 (en) 1991-04-25
FR2605399B1 (en) 1989-01-27
CA1277527C (en) 1990-12-11
ATE61874T1 (en) 1991-04-15
ES2002604B3 (en) 1991-11-01
IL84165A (en) 1992-08-18
IL84165A0 (en) 1988-03-31
US4793259A (en) 1988-12-27
JPS63153400A (en) 1988-06-25

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