EP0258125B1 - Subcalibre arrow-type projectile having an increased impact efficiency on soft targets - Google Patents

Subcalibre arrow-type projectile having an increased impact efficiency on soft targets Download PDF

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Publication number
EP0258125B1
EP0258125B1 EP87401851A EP87401851A EP0258125B1 EP 0258125 B1 EP0258125 B1 EP 0258125B1 EP 87401851 A EP87401851 A EP 87401851A EP 87401851 A EP87401851 A EP 87401851A EP 0258125 B1 EP0258125 B1 EP 0258125B1
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EP
European Patent Office
Prior art keywords
bullet
projectile
sheath
launcher
bullet body
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EP87401851A
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German (de)
French (fr)
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EP0258125A1 (en
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Jean-Claude Sauvestre
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    • 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
    • F42B12/34—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect expanding before or on impact, i.e. of dumdum or mushroom type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/064—Sabots enclosing the rear end of a kinetic energy projectile, i.e. having a closed disk shaped obturator base and petals extending forward from said base

Definitions

  • the present invention relates to ammunition for small or medium caliber weapons and in particular ammunition for hunting weapons.
  • Document FR-A 2 599 828 describes, according to the preamble of claim 1, an ammunition comprising a bullet projectile sub-calibrated stabilized by tail and a detachable launcher.
  • the bullet claimed by this patent consists of at least three elements: a stabilizer generally made of plastic alloy, a very hard metal bar completely included in the bullet and a bullet body most often made of lead alloy.
  • the ball comprises at its front part at least one conical surface associated with fracture primers extending radially from the outside towards the axis of the ball.
  • Such a ball very effective on big game such as: mountain game (chamois and mouflon), medium-heavy animals (deer, deer, sika, deer and wild boar), heavy animals (deer with hair, adult wild boar), presents the disadvantage of being less effective on the deer considered to be the largest of the small game.
  • the aim of the present invention consists in the design of a ball capable of attacking small game with optimal terminal efficiency based on a capacity which is sensitive to the tender parts of the animal.
  • the invention therefore relates to ammunition for a small or medium caliber weapon and in particular for a hunting weapon, of the type comprising a projectile constituted by an under-calibrated bullet comprising a bullet body and a stabilizing stabilizer and propelled by a launcher at caliber of the weapon, characterized in that the bullet-launcher connection is ensured by means of a sheath extending the tail, said bullet body being constituted by several parts extending longitudinally and intended to separate during the impact after bursting of said sheath.
  • the bullet body, the launcher and the sheath have grooves and adents cooperating with each other so as to drive the ball and its empennage during the launching phase.
  • the ball-sheath body interface is substantially conical.
  • the bullet body further comprises a sub-projectile disposed on the longitudinal axis of the projectile, between the parts of the bullet body and the tail, the sub-projectile being able to comprise a male conical part. associated with a female conical part produced at the rear of the parts of the bullet body.
  • the bullet depicted in the figures listed above is a hunting bullet intended to be fired by a smooth-bore or lightly rifled 12-gauge weapon.
  • the elements 8 and 9 of the bullet body 7 comprise at their periphery circular grooves 13 intended on the one hand to ensure the mechanical strength of the bullet body 7 with respect to the sheath 11 during the acceleration phase of the projectile 3 in the barrel of the weapon and, on the other hand, to guarantee the mechanical connection on the trajectory between the stabilizing system 12 and the bullet body 7.
  • the stabilizer system 12 generally made of plastic alloy, is obtained by injection on the elements 8 and 9 of the bale body 7.
  • the sheath 11 of this stabilizer system has inside circular teeth 16 cooperating with the similar profile of the grooves 13 of the ball body 7 and, outside, circular grooves 17 which overlap in the grooves 13 of said ball body so that the thickness (a) of the sheath 11 remains substantially constant.
  • This thickness is also dimensioned so that it contributes favorably to the radial retention of the elements 8 and 9 of the bullet 7, this, essentially in the case of shooting from a weakly rifled weapon whose speed of rotation can reach dye 300t / s.
  • Said system stabilizer carries at its rear part stabilizer 6 to ensure good stabilization of the ball 4 on the trajectory.
  • a launcher 5 nesting around the ball 4 and consisting of two elements. This launcher allows the ball 4 to be launched at the desired speed and releases it as soon as it leaves the barrel.
  • a crimping of the star type 19, for example, makes it possible to maintain the projectile 3 in the case 1, the tail 6 being penetrated into the propellant powder 2.
  • FIG. 1B represents said ball on the trajectory.
  • Figure 1C shows the bullet 4 on impact on a weak or soft target.
  • the soft flesh of game accumulating on impact in the conical recess 14 of the elements 8 and 9 of the ball 4 generate couples F x 1 which tend to deviate by an angle from said elements, these the latter resting between them on a diametral line 20 situated at the rear of the diametral plane of separation of these said elements until the sheath 11 of the stabilizing system 12 is burst.
  • the elements thus released, progress separately in the next target trajectories essentially a function of the resistance of the environment encountered by each of them.
  • FIG. 2 represents a ball 4 in flight order composed of a stabilization system 12 and a ball body 7 comprising three elements: two elements 8 and 9 designed in an identical manner to those described above and a rear element said to be a sub-projectile 21.
  • This bullet the operation of which is represented by FIG. 2A, makes it possible to ensure a greater vulnering effect on the game thanks to the release of element 21 which, less braked in the flesh of the game that elements 8 and 9 will allow it to continue its race with a speed V following a fairly straight path.
  • Element 21 can be made of steel, of a lead alloy (for example harder than that used for elements 8 and 9) or any other metallic material. Said element comprises a groove 22 allowing its connection to the stabilizing system 12 and a front shoulder 23 ensuring its centering in the elements 8 and 9 of the bullet body 7.
  • Figure 3 shows another variant derived from the first described above because the element 21 is biconical in shape.
  • the value of the angle at the apex a 1 of the front cone 24 as well as the value of the angle a 2 of the conical recess 14 contribute, at equal impact velocity and at midpoint encountered, to the value of the angle a (FIG. 3A) of spacing of the elements 8 and 9 of the ball 4.
  • FIG. 4 shows another embodiment of the invention.
  • the bullet 4 comprises a stabilizer system 12 and a bullet body 7 comprising two elements 8 and 9, the rear portion 25 of which is conical. This ensures better bursting of the sheath 11 which further comprises at the front a weakening 26 thanks to a reduction in the thickness of the sheath 11.
  • FIGS. 5, 5A and 5B represent a bullet 4 provided with a system facilitating the bursting of the sheath on impact which comprises radial fracture primers 31 and longitudinal 29.
  • each element 8 and 9 of the ball has triangular parts 27 and 28 obtained during manufacture. These said parts are located in the diametrical plane of contact of the two elements ( Figure 5B).
  • the stabilizing system 12 obtained by injection, the material cooperates inter alia with the parts 27 and 28 of the elements 8 and 9 thus forming two initiators of rupture 31.
  • the longitudinal fracture primers 29 are obtained by molding grooves with a triangular profile, extending over all or part of the length of the sheath 11.

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Abstract

1. Projectile for ammunition which may be shooted by a weapon of small or medium calibre and in particular by a sporting gun, the projectile consisting of a sub-calibrated bullet (4) comprising a bullet body (7) and stabilizer fins (6) and propelled by a launcher (5) at the calibre of the weapon, characterized in that the bullet-launcher connection is provided through the agency of a sheath (11) in extension of the fins, said bullet body consisting of several part (8, 9) extending lengthwise and adapted to part upon the impact after the bursting of the said sheath.

Description

La présente invention concerne les munitions pour armes de petit ou moyen calibre et en particulier les munitions pour armes de chasse.The present invention relates to ammunition for small or medium caliber weapons and in particular ammunition for hunting weapons.

Le document FR-A 2 599 828 décrit selon le préambule de la revendication 1 une munition comportant un projectile à balle sous-calibrée stabilisée par empennage et un lanceur détachable. La balle revendiquée par ce brevet est constituée par au moins trois éléments : un stabilisateur généralement en alliage de plastique, un barreau métallique très dur totalement inclus dans la balle et un corps de balle le plus souvent en alliage de plomb. Selon un mode particulier, la balle comporte à sa partie avant au moins une surface conique associée à des amorces de rupture s'étendant radialement de l'extérieur vers l'axe de la balle.Document FR-A 2 599 828 describes, according to the preamble of claim 1, an ammunition comprising a bullet projectile sub-calibrated stabilized by tail and a detachable launcher. The bullet claimed by this patent consists of at least three elements: a stabilizer generally made of plastic alloy, a very hard metal bar completely included in the bullet and a bullet body most often made of lead alloy. According to a particular embodiment, the ball comprises at its front part at least one conical surface associated with fracture primers extending radially from the outside towards the axis of the ball.

Une telle balle, très performante sur gros gibiers tels que : gibiers de montagne (chamois et mouflons), animaux mi-lourds (daims, cerfs, sika, cerfs et sangliers), animaux lourds (cerfs coiffés, sangliers adultes), présente l'inconvénient d'être moins efficace sur le chevreuil considéré comme le plus grand des petits gibiers.Such a ball, very effective on big game such as: mountain game (chamois and mouflon), medium-heavy animals (deer, deer, sika, deer and wild boar), heavy animals (deer with hair, adult wild boar), presents the disadvantage of being less effective on the deer considered to be the largest of the small game.

En effet, la résistance du gibier à l'impact et la consistance des chairs doivent être assez importantes pour permettre l'éclatement de la tête d'une telle balle et générer ainsi des éclats meurtriers. Par contre cette même balle traversera aisément le corps d'un chevreuil en n'abandonnant que peu d'énergie. Par ailleurs sa puissance est telle, qu'elle risque d'agir trop brutalement si elle rencontre un gros os de ce même animal causant ainsi des dégâts trop importants.Indeed, the resistance of the game to the impact and the consistency of the flesh must be important enough to allow the bursting of the head of such a ball and thus generate deadly splinters. On the other hand this same ball will easily cross the body of a deer while giving up only little energy. Furthermore, its power is such that it risks acting too brutally if it encounters a large bone of the same animal, thus causing too great damage.

Le but de la présente invention consiste en la conception d'une balle capable d'agresser des gibiers de petite taille avec une efficacité terminale optimale basée sur une capacité vulnérante pour les parties tendres de l'animal.The aim of the present invention consists in the design of a ball capable of attacking small game with optimal terminal efficiency based on a capacity which is sensitive to the tender parts of the animal.

L'invention concerne donc une munition pour arme de petit ou de moyen calibre et en particulier pour arme de chasse, du type comportant un projectile constitué par une balle sous-calibrée comprenant un corps de balle et un empennage stabilisateur et propulsée par un lanceur au calibre de l'arme, caractérisé en ce que la liaison balle-lanceur est assurée par l'intermédiaire d'une gaine prolongeant l'empennage, ledit corps de balle étant constitué par plusieurs parties s'étendant longitudinalement et destinées à se séparer lors de l'impact après éclatement de ladite gaine.The invention therefore relates to ammunition for a small or medium caliber weapon and in particular for a hunting weapon, of the type comprising a projectile constituted by an under-calibrated bullet comprising a bullet body and a stabilizing stabilizer and propelled by a launcher at caliber of the weapon, characterized in that the bullet-launcher connection is ensured by means of a sheath extending the tail, said bullet body being constituted by several parts extending longitudinally and intended to separate during the impact after bursting of said sheath.

Selon un premier mode particulier de réalisation, le corps de balle, le lanceur et la gaine comportent des gorges et des adents coopérant entre eux de façon à assurer l'entraînement de la balle et de son empennage lors de la phase de lancement.According to a first particular embodiment, the bullet body, the launcher and the sheath have grooves and adents cooperating with each other so as to drive the ball and its empennage during the launching phase.

Selon une autre variante, l'interface corps de balle-gaine est sensiblement conique.According to another variant, the ball-sheath body interface is substantially conical.

Selon un autre mode particulier de réalisation, le corps de balle comprend de plus un sous-projectile disposé sur l'axe longitudinal du projectile, entre les parties du corps de balle et l'empennage, le sous-projectile pouvant comporter une partie conique mâle associée à une partie conique femelle réalisée à l'arrière des parties du corps de balle.According to another particular embodiment, the bullet body further comprises a sub-projectile disposed on the longitudinal axis of the projectile, between the parts of the bullet body and the tail, the sub-projectile being able to comprise a male conical part. associated with a female conical part produced at the rear of the parts of the bullet body.

Selon d'autres variantes :

  • La gaine comporte des zones de fragilisation longitudinales et/ou radiales.
  • L'avant de la balle comporte des saillies coopérant avec les zones de fragilisation de la gaine de façon à faciliter la séparation gaine-balle lors de l'impact.
According to other variants:
  • The sheath has longitudinal and / or radial weakening zones.
  • The front of the bale has projections cooperating with the zones of embrittlement of the sheath so as to facilitate the sheath-bale separation during impact.

L'invention sera mieux comprise à l'aide de la description qui va suivre, description faite en référence aux dessins annexés dans lesquels :

  • La figure 1 représente une demi-vue en coupe longitudinale d'un projectile selon l'invention.
  • La figure 1 A représente une coupe transversale selon AA de la figure 1.
  • La figure 1 B représente la balle sur trajectoire.
  • La figure 1 C représente la balle à l'impact.
  • Les figures 2 & 2A ; 3 & 3A ; 4 ; 5, 5A & 5B représentent des variantes de l'invention.
The invention will be better understood with the aid of the description which follows, description made with reference to the appended drawings in which:
  • FIG. 1 represents a half-view in longitudinal section of a projectile according to the invention.
  • FIG. 1A represents a cross section along AA of FIG. 1.
  • Figure 1B shows the ball on trajectory.
  • Figure 1C shows the bullet on impact.
  • Figures 2 &2A; 3 &3A;4; 5, 5A & 5B represent variants of the invention.

La balle représentée sur les figures énumérées ci-dessus est une balle de chasse destinée à être tirée par une arme à âme lisse ou faiblement rayée de calibre 12.The bullet depicted in the figures listed above is a hunting bullet intended to be fired by a smooth-bore or lightly rifled 12-gauge weapon.

La figure 1 représente une cartouche composée :

  • - d'une douille 1 amorcée contenant la poudre propulsive 2 et d'une amorce non représentée.
  • - d'un projectile 3 constitué par :
  • - une balle 4 comprenant elle-même un corps de balle 7, en alliage de plomb par exemple, composé de deux éléments hémicylindrinques et identiques 8 et 9, accolés et maintenus entre eux suivant un plan diamétral 10 grâce à la gaine 11 du système stabilisateur 12 comportant l'empennage 6.
FIG. 1 represents a cartridge composed:
  • - a primed socket 1 containing the propellant powder 2 and a primer not shown.
  • - a projectile 3 consisting of:
  • - a ball 4 itself comprising a ball body 7, made of lead alloy for example, composed of two semi-cylindrical and identical elements 8 and 9, joined and held together along a diametrical plane 10 thanks to the sheath 11 of the stabilizing system 12 comprising the tail 6.

Les éléments 8 et 9 du corps de balle 7 comportent à leur périphérie des sillons circulaires 13 destinés d'une part à assurer la tenue mécanique du corps de balle 7 vis-à-vis de la gaine 11 pendant la phase d'accélération du projectile 3 dans le tube de l'arme et, d'autre part à garantir la liaison mécanique sur trajectoire entre le système stabilisateur 12 et le corps de balle 7.The elements 8 and 9 of the bullet body 7 comprise at their periphery circular grooves 13 intended on the one hand to ensure the mechanical strength of the bullet body 7 with respect to the sheath 11 during the acceleration phase of the projectile 3 in the barrel of the weapon and, on the other hand, to guarantee the mechanical connection on the trajectory between the stabilizing system 12 and the bullet body 7.

Ces mêmes éléments comportent à leur partie avant un évidement conique 14 dont l'utilité sera précisée plus loin et à leur partie arrière un cône 15.These same elements comprise at their front part a conical recess 14 the usefulness of which will be specified below and at their rear part a cone 15.

Le système stabilisateur 12, généralement en alliage de plastique, est obtenu par injection sur les éléments 8 et 9 du corps de balle 7. La gaine 11 de ce système stabilisateur comporte à l'intérieur des adents circulaires 16 coopérant avec le profil similaire des sillons 13 du corps de balle 7 et, à l'extérieur, des gorges circulaires 17 s'imbriquant dans les sillons 13 dudit corps de balle de telle manière que l'épaisseur (a) de la gaine 11 reste sensiblement constante.The stabilizer system 12, generally made of plastic alloy, is obtained by injection on the elements 8 and 9 of the bale body 7. The sheath 11 of this stabilizer system has inside circular teeth 16 cooperating with the similar profile of the grooves 13 of the ball body 7 and, outside, circular grooves 17 which overlap in the grooves 13 of said ball body so that the thickness (a) of the sheath 11 remains substantially constant.

Cette épaisseur est dimensionnée également de telle sorte qu'elle contribue favorablement au maintien radial des éléments 8 et 9 de la balle 7 et ce, essentiellement dans le cas de tir à partir d'une arme faiblement rayée dont la vitesse de rotation peut at- teindre 300t/s.This thickness is also dimensioned so that it contributes favorably to the radial retention of the elements 8 and 9 of the bullet 7, this, essentially in the case of shooting from a weakly rifled weapon whose speed of rotation can reach dye 300t / s.

Ces gorges 17 coopèrent avantageusement avec les adents 18 du lanceur 5 pour assurer une parfaite tenue mécanique du projectile 3 pendant sa phase d'accélération dans le tube de l'arme. Ledit système stabilisateur porte à sa partie arrière le stabilisateur 6 pour assurer une bonne stabilisation de la balle 4 sur trajectoire.These grooves 17 advantageously cooperate with the teeth 18 of the launcher 5 to ensure perfect mechanical strength of the projectile 3 during its acceleration phase in the barrel of the weapon. Said system stabilizer carries at its rear part stabilizer 6 to ensure good stabilization of the ball 4 on the trajectory.

- un lanceur 5 s'imbriquant autour de la balle 4 et constitué de deux éléments. Ce lanceur permet le lancement de la balle 4 à la vitesse désirée et libère cette dernière dès la sortie du tube de l'arme.- A launcher 5 nesting around the ball 4 and consisting of two elements. This launcher allows the ball 4 to be launched at the desired speed and releases it as soon as it leaves the barrel.

Un sertissage du type étoile 19, par exemple, permet de maintenir le projectile 3 dans la douille 1, l'empennage 6 étant pénétré dans la poudre propulsive 2.A crimping of the star type 19, for example, makes it possible to maintain the projectile 3 in the case 1, the tail 6 being penetrated into the propellant powder 2.

Les conceptions, constitution et fonctionnement du lanceur 5 seront avantageusement compris à la lecture des brevets français 83 18 988, 86 08 094, 86 10 659 et 8610 660.The designs, construction and operation of the launcher 5 will be advantageously understood on reading French patents 83 18 988, 86 08 094, 86 10 659 and 8610 660.

Les formes avant possibles des éléments 8 et 9 sont décrites dans le brevet 86 08 093.The possible front shapes of the elements 8 and 9 are described in patent 86 08 093.

Le fonctionnement du projectile est le suivant : (figures 1, 1 B & 1 C).The operation of the projectile is as follows: (Figures 1, 1 B & 1 C).

Pendant la phase de lancement la pression p s'exercant sur l'arrière du projectile 3 propulse ce dernier à la vitesse désirée grâce au lanceur 5 qui entraîne la balle 4 par l'intermédiaire des gorges 17 de la gaine 11 et des adents 18 du lanceur 5. A la sortie de l'arme le lanceur libère la balle munie de son empennage. La figure 1 B représente ladite balle sur trajectoire.During the launch phase, the pressure p exerted on the rear of the projectile 3 propels the latter at the desired speed thanks to the launcher 5 which drives the ball 4 by means of the grooves 17 of the sheath 11 and the teeth 18 of the launcher 5. At the exit of the weapon the launcher releases the ball provided with its empennage. FIG. 1B represents said ball on the trajectory.

La figure 1 C représente la balle 4 à l'impact sur une cible peu résistante ou molle. En effet, les chairs molles du gibier s'accumulant à l'impact dans l'évidement conique 14 des éléments 8 et 9 de la balle 4, génèrent des couples F x 1 qui tendent à écarter d'un angle a lesdits éléments, ces derniers prenant appui entre eux sur une ligne diamétrale 20 située à l'arrière du plan diamétral de séparation de cesdits éléments jusqu'à obtenir l'éclatement de la gaine 11 du système stabilisateur 12. Les éléments ainsi libérés, progressent séparément dans la cible suivant des trajectoires essentiellement fonction de la résistance du milieu rencontré par chacun d'eux.Figure 1C shows the bullet 4 on impact on a weak or soft target. Indeed, the soft flesh of game accumulating on impact in the conical recess 14 of the elements 8 and 9 of the ball 4, generate couples F x 1 which tend to deviate by an angle from said elements, these the latter resting between them on a diametral line 20 situated at the rear of the diametral plane of separation of these said elements until the sheath 11 of the stabilizing system 12 is burst. The elements thus released, progress separately in the next target trajectories essentially a function of the resistance of the environment encountered by each of them.

La figure 2 représente une balle 4 en ordre de vol composée d'un système de stabilisation 12 et d'un corps de balle 7 comprenant trois éléments : deux éléments 8 et 9 conçus d'une façon identique à ceux décrits ci-dessus et un élément arrière dit sous-projectile 21. Cette balle, dont le fonctionnement est représenté par la figure 2A, permet d'assurer un effet vulnérant plus important sur le gibier grâce à la libération de l'élément 21 qui, moins freiné dans les chairs du gibier que les éléments 8 et 9 permettra de poursuivre sa course avec une vitesse V suivant une trajectoire assez rectiligne.FIG. 2 represents a ball 4 in flight order composed of a stabilization system 12 and a ball body 7 comprising three elements: two elements 8 and 9 designed in an identical manner to those described above and a rear element said to be a sub-projectile 21. This bullet, the operation of which is represented by FIG. 2A, makes it possible to ensure a greater vulnering effect on the game thanks to the release of element 21 which, less braked in the flesh of the game that elements 8 and 9 will allow it to continue its race with a speed V following a fairly straight path.

L'élément 21 peut être réalisé en acier, en alliage de plomb ( par exemple plus dur que celui utilisé pour les éléments 8 et 9) ou en tout autre matériau métallique. Cedit élément comporte une gorge 22 permettant sa liaison au système stabilisateur 12 et un épaulement avant 23 assurant son centrage dans les éléments 8 et 9 du corps de balle 7.Element 21 can be made of steel, of a lead alloy (for example harder than that used for elements 8 and 9) or any other metallic material. Said element comprises a groove 22 allowing its connection to the stabilizing system 12 and a front shoulder 23 ensuring its centering in the elements 8 and 9 of the bullet body 7.

La figure 3 représente une autre variante dérivée de la première décrite ci-dessus car l'élément 21 est de forme biconique. La valeur de l'angle au sommet a 1 du cône avant 24 ainsi que la valeur de l'angle a 2 de l'évidement conique 14 contribuent, à vitesse d'impact égale et à milieu rencontré égal, à la valeur de l'angle a (figure 3A) d'écartement des éléments 8 et 9 de la balle 4.Figure 3 shows another variant derived from the first described above because the element 21 is biconical in shape. The value of the angle at the apex a 1 of the front cone 24 as well as the value of the angle a 2 of the conical recess 14 contribute, at equal impact velocity and at midpoint encountered, to the value of the angle a (FIG. 3A) of spacing of the elements 8 and 9 of the ball 4.

La figure 4 représente un autre mode de réalisation de l'invention. La balle 4 comporte un système de stabilisateur 12 et un corps de balle 7 comprenant deux éléments 8 et 9 dont leur partie arrière 25 est conique. Ceci permet d'assurer un meilleur éclatement de la gaine 11 qui comporte en outre à l'avant une fragilisation 26 grâce à une diminution de l'épaisseur de la gaine 11.Figure 4 shows another embodiment of the invention. The bullet 4 comprises a stabilizer system 12 and a bullet body 7 comprising two elements 8 and 9, the rear portion 25 of which is conical. This ensures better bursting of the sheath 11 which further comprises at the front a weakening 26 thanks to a reduction in the thickness of the sheath 11.

Les figures 5, 5A et 5B représentent une balle 4 munie d'un système facilitant l'éclatement de la gaine à l'impact qui comporte des amorces de rupture radiales 31 et longitudinales 29. Pour ce qui concerne les amorces de rupture radiales 31, chaque élément 8 et 9 de la balle comporte des parties triangulaires 27 et 28 obtenues lors de la fabrication. Cesdites parties sont situées dans le plan diamétral de contact des deux éléments (Figure 5B). Lors de la réalisation du système stabilisateur 12 obtenu par injection, la matière coopère entre autres avec les parties 27 et 28 des éléments 8 et 9 formant donc deux amorces de rupture 31.FIGS. 5, 5A and 5B represent a bullet 4 provided with a system facilitating the bursting of the sheath on impact which comprises radial fracture primers 31 and longitudinal 29. With regard to the radial fracture primers 31, each element 8 and 9 of the ball has triangular parts 27 and 28 obtained during manufacture. These said parts are located in the diametrical plane of contact of the two elements (Figure 5B). During the production of the stabilizing system 12 obtained by injection, the material cooperates inter alia with the parts 27 and 28 of the elements 8 and 9 thus forming two initiators of rupture 31.

Les amorces de rupture longitudinales 29 sont obtenues par réalisation au moulage de rainures à profil trianglaire, s'étendant sur tout ou partie de la longueur de la gaine 11.The longitudinal fracture primers 29 are obtained by molding grooves with a triangular profile, extending over all or part of the length of the sheath 11.

Claims (7)

1. Projectile for ammunition which may be shooted by a weapon of small or medium calibre and in particular by a sporting gun, the projectile consisting of a sub-calibrated bullet (4) comprising a bullet body (7) and stabilizer fins (6) and propelled by a launcher (5) at the calibre of the weapon, characterized in that the bullet-launcher connection is provided through the agency of a sheath (11) in extension of the fins, said bullet body consisting of several part (8, 9) extending lengthwise and adapted to part upon the impact after the bursting of the said sheath.
2. Projectile according to claim 1, characterized in that the bullet body, the launcher and the sheath comprise grooves and indentations (13, 16, 17, 18) cooperating between them so as to provide for the drive of the bullet during the launching phase.
3. Projectile according to one of claims 1 or 2, characterized in that the bullet body-sheath interface is substantially conical.
4. Projectile according to one of claims 1 to 3, characterized in that the bullet body further comprises a sub-projectile (21) arranged upon the longitudinal axis of the projectile between the parts (8, 9) of the bullet body and the fins.
5. Projectile according to claim 4, characterized in that the sub-projectile (21) comprises on the axis of the projectile a male tapering portion (24) associated with a female tapering portion formed rearwards of the parts (8, 9) of the bullet body.
6. Projectile according to one of claims 1 to 5, characterized in that the sheath comprises longitudinal and/or radial frangible zones (29, 31).
7. Projectile according to claim 6, characterized in that the forward portion of the bullet comprises projections (27, 28) cooperating with the frangible zones of the sheath so as to facilitate the sheath- bullet parting upon the impact.
EP87401851A 1986-08-07 1987-08-07 Subcalibre arrow-type projectile having an increased impact efficiency on soft targets Expired - Lifetime EP0258125B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87401851T ATE52613T1 (en) 1986-08-07 1987-08-07 SUB-CALIBRE HUNTING CARTRIDGE ARROW WITH INCREASED FINAL IMPACT IN SOFT TARGETS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8611436A FR2602583B1 (en) 1986-08-07 1986-08-07 SUB-CALIBRATED BOOM-TYPE HUNTING BALL WITH INCREASED TERMINAL EFFICIENCY ON SOFT TARGETS
FR8611436 1986-08-07

Publications (2)

Publication Number Publication Date
EP0258125A1 EP0258125A1 (en) 1988-03-02
EP0258125B1 true EP0258125B1 (en) 1990-05-09

Family

ID=9338118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87401851A Expired - Lifetime EP0258125B1 (en) 1986-08-07 1987-08-07 Subcalibre arrow-type projectile having an increased impact efficiency on soft targets

Country Status (6)

Country Link
EP (1) EP0258125B1 (en)
AT (1) ATE52613T1 (en)
DE (1) DE3762688D1 (en)
ES (1) ES2015960B3 (en)
FR (1) FR2602583B1 (en)
GR (1) GR3000697T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2786562B1 (en) 1998-11-26 2001-02-09 Jean Noel Letellier ADAPTER FOR CALIBRATED BULLET USED IN A SMOOTH CANNON WEAPON
FR2834556A1 (en) * 2002-01-10 2003-07-11 Michel Lenois Non-lethal firearm projectile comprises two hinged semi-cylindrical halves that deploy on leaving barrel and spin like aircraft propeller
GB2502507B (en) * 2012-03-22 2014-10-15 Graham Ammunition Ltd Sabot for use in conjunction with a rifled barrel

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60850C (en) * Firma J. P. SAUER & SOHN in Suhl, Thüringen Rifle projectile with flaps that spread on impact
GB574579A (en) * 1943-06-23 1946-01-11 Western Cartridge Co Improvements in or relating to expanding projectiles
US2661694A (en) * 1950-05-12 1953-12-08 James E Allen Spreader panel bullet
FR1283366A (en) * 1959-12-31 1962-02-02 Dynamit Nobel Ag Special projectile intended for hunting
US3941059A (en) * 1967-01-18 1976-03-02 The United States Of America As Represented By The Secretary Of The Army Flechette
FR2555728B1 (en) * 1983-11-29 1987-03-20 Sauvestre Jean Claude HUNTING WEAPON AMMUNITION

Also Published As

Publication number Publication date
FR2602583B1 (en) 1990-08-03
ATE52613T1 (en) 1990-05-15
EP0258125A1 (en) 1988-03-02
ES2015960B3 (en) 1990-09-16
GR3000697T3 (en) 1991-09-27
DE3762688D1 (en) 1990-06-13
FR2602583A1 (en) 1988-02-12

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