EP1023573A1 - Launcher with enhanced tightness for ammunitions comprising a launcher associated with a sub-projectile - Google Patents

Launcher with enhanced tightness for ammunitions comprising a launcher associated with a sub-projectile

Info

Publication number
EP1023573A1
EP1023573A1 EP98947606A EP98947606A EP1023573A1 EP 1023573 A1 EP1023573 A1 EP 1023573A1 EP 98947606 A EP98947606 A EP 98947606A EP 98947606 A EP98947606 A EP 98947606A EP 1023573 A1 EP1023573 A1 EP 1023573A1
Authority
EP
European Patent Office
Prior art keywords
launcher
seal
face
launcher according
projectile
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
EP98947606A
Other languages
German (de)
French (fr)
Other versions
EP1023573B1 (en
Inventor
Jean-Claude Sauvestre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1023573A1 publication Critical patent/EP1023573A1/en
Application granted granted Critical
Publication of EP1023573B1 publication Critical patent/EP1023573B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F42B14/061—Sabots for long rod fin stabilised kinetic energy projectiles, i.e. multisegment sabots attached midway on the projectile
    • 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
    • F42B14/02—Driving bands; Rotating bands

Definitions

  • the present invention relates to ammunition for small, medium and large caliber weapons, and more particularly to an improved launcher with improved sealing, for ammunition of the type comprising an undersized bullet and a launcher, in particular for hunting or training weapons.
  • the launch techniques frequently used today use a launcher generally consisting of two or more elements surrounding the sub-projectile.
  • the elements of the launcher assembled together in contiguous planes by a locking system, can be made of metal alloys or plastic.
  • the aerodynamic forces exerted on the projectile at the exit of the weapon cause the separation of the elements of the launcher which, after separation, each follow their own trajectory and fall at varying distances from the weapon.
  • patent FR-A-2,555,728 describes ammunition for hunting weapons comprising an under-calibrated projectile stabilized by empennage, comprising a tapered bullet of dense alloy associated with a launcher made of plastic.
  • patents FR-A-2,599,828 and FR-A-2,606,500 describe hunting bullets of the type comprising a sub-projectile and a launcher made of several detachable elements, the characteristics of which are improved.
  • patent FR-A-2,599,828 describes a bullet with great stability on trajectory, and therefore providing good shooting precision, but destabilizing beyond a certain distance.
  • Patent FR-A-2,606,500 relates to ammunition providing a high initial speed and limiting the violence of the recoil shock, constituted by an undersized bullet and a launcher of the caliber of the weapon, comprising an open external annular chamber, separated from the propellant charge by a partition liable to rupture under the pressure of the gases generated by the combustion of the charge.
  • One of the difficulties faced by this technique of the sub-calibrated bullet associated with a launcher is that of sealing, and more particularly sealing against propellant gases when the charge is ignited. Although these difficulties are encountered very particularly in the case of launchers in two or more elements, the problem of sealing also arises in the case of monoblock launchers.
  • it is essential that the presence of the launcher does not interfere with the cartridge-filling operations during which the sub-projectile and the launcher are placed in a cartridge comprising a primed cartridge case and a charge of propellant powder.
  • the present invention specifically relates to a launcher with improved sealing for ammunition of the type comprising a launcher associated with a sub-projectile on which it can adapt, comprising one or more elements and at least one peripheral seal.
  • a subject of the invention is also a launcher for ammunition of the type comprising a launcher associated with a sub-projectile on which it can be adapted, providing both an improved seal against combustion gases and a reduction of the recoil shock of the weapon.
  • the invention also relates to a complete bullet consisting of an under-calibrated projectile associated with a launcher, and comprising an optimized seal.
  • the launcher according to the present invention is distinguished in that it comprises at least one seal continuously encircling the external face and the internal face of each element, each seal preferably consisting of a single piece.
  • each element of the launcher is crossed by one or more perforations ensuring the joining of the joint, and the launcher of the invention preferably comprises at least two separable elements.
  • the joint covers at least in part not only the external face, but also the internal face and the edge of the junction plane of each launcher element, and it has a thickness such that it exceeds beyond the surface. external, of the internal surface, and of the junction plane, from a distance between 0 and 1 mm, and preferably between 0.1 and 0.5 mm in the case of hunting ammunition.
  • the seal can be formed on each element of the launcher by molding in a flexible material chosen from natural or artificial rubbers, and for example in vulcanizable rubber or in thermoplastic elastomer, preferably having excellent adhesion to the material constituting the launcher, and containing, where appropriate, usual fillers intended to improve the mechanical properties thereof, for example an anti-ultraviolet agent improving resistance to aging or a lubricating agent intended to facilitate sliding against the wall of the barrel of the weapon.
  • the hardness of the rubber used is chosen according to the conditions of use, and it is generally between 20 and 120 (Shore hardness), and preferably between 50 and 90.
  • each element is crossed by one or more perforations allowing the material to pass during the molding of the seal.
  • the seal disposed on the rear part of the launcher element preferably comprises an annular seal closing the space between the launcher and the internal wall of the sleeve, delimiting an external annular chamber in the immediate vicinity of the load.
  • this cover deforms, causing the chamber containing the charge to communicate with the external annular chamber, and allowing thus the relaxation of the gases. This results in a reduction in the recoil shock felt by the user of the weapon, as well as an optimization of the speed of combustion of the powder.
  • the launcher When the launcher has a single seal, it is preferably placed on the front part of each element. In fact, the tests carried out with the ammunition in accordance with the invention have shown that this arrangement facilitates the cartoning operations.
  • front part within the meaning of the invention means the area formed approximately by half of the launcher located towards the front of the projectile.
  • the seal according to the present invention is preferably placed in this front part, and more preferably at a distance from the front edge of the launcher representing less than 30% of the length of the launcher.
  • the part of the launcher located in front of the joint can be independent of the other part.
  • it then consists of two cylindrical elements arranged longitudinally on the same axis and separated by the seal attached to the edge of one of the two elements.
  • the seal is arranged at the front end of the launcher, of which it envelops the front face, the latter preferably comprising transverse notches facilitating the attachment of the seal to the launcher and the 'assembly of the elements when the launcher is in two or more elements.
  • the launcher with improved sealing in accordance with the present invention can be made of metal or of a metal alloy, for example of aluminum alloy, or alternatively of plastic material produced by molding or by injection, for example of polyamide.
  • the invention also relates to a method for manufacturing a launcher with improved sealing for ammunition of the type comprising a launcher associated with a sub-projectile, comprising one or more elements each comprising an integrated flexible seal.
  • thermoplastic elastomer or vulcanizable rubber is carried out directly on each element of the launcher, on a part of the wall of the launcher crossed by perforations.
  • the device according to the present invention is applicable in all ammunition, of small, medium or large caliber, of the type comprising an under-calibrated projectile, for example a sub-calibrated bullet, and a launcher made up of one or more separable elements, in the field of hunting, sport or training weapons, and preferably in that of hunting weapons.
  • This device is inserted in an assembly constituted by a cartridge, which consists of: a primed socket; a charge of propellant powder; a complete bullet comprising a launcher according to the invention, of the caliber of the weapon, and a sub-calibrated bullet.
  • the present invention provides the advantage of reducing the standard deviation of pressure and speed. , and therefore to decrease the dispersion of the shot. In addition, there is no disturbance in the trajectory of the sub-projectile.
  • Figure 1 a half-section view of a complete bullet, comprising an undersized bullet and a launcher with improved sealing according to the invention.
  • Figure 2 a half-section view showing a second embodiment of the launcher according to the invention, comprising a seal in the rear part.
  • Figure 3 a half-section view showing another embodiment of the launcher according to the invention, comprising a seal in the front part.
  • Figure 4 a half-section view showing another embodiment of the launcher according to the invention, comprising two seals.
  • Figure 5a a front view of a variant of the launcher of the invention comprising a seal in the front part, corresponding to the embodiment of Figure 5b.
  • Figure 5b a partial sectional view along AA of the launcher of Figure 5a.
  • Figure 1 shows, in half-view, a cartridge comprising a launcher element (1) of substantially semi-cylindrical shape, a cartridge case (2), a primer (3) and a propellant charge (4).
  • the shape of the internal wall of the launcher (1) is intended to adapt in known manner to the body of the sub-calibrated bullet (5) of the arrow-bullet type.
  • the internal face of the launcher has teeth (6) cooperating with grooves (7) formed on the body of the ball (5).
  • the launcher has on its external face annular grooves of substantially semi-circular section (8 and 9) forming decompression grooves, and limiting the friction surface in the barrel of the weapon.
  • the front part (10) of the launcher has a conical internal surface (11) of diameter widening from the rear towards the front, in order to facilitate the separation of the launcher element under the effect of the aerodynamic forces s' exerting at the exit of the barrel of the weapon.
  • the rear part (12) has an annular skirt (13) and a groove (14), at the level of the connection with the body of the launcher element.
  • the skirt (13) is crossed by two series of perforations (15) arranged in a transverse plane, each series can include, for example, 3 or 4 perforations in the wall of the launcher.
  • the annular skirt (13) is truncated at its two ends so that its section is not entirely semi-circular but covers an arc of approximately 170 °; thus the two launcher elements (1) put in place are not joined by the edges of their respective annular skirts (13) but a space is provided between them, in which the seal takes place as indicated below.
  • the seal (16) envelops the entire annular skirt (13) and the groove (14), and the natural or artificial rubber which constitutes it fills the perforations (15) passing through the wall. It projects slightly beyond the external surface of the launcher (1), above the groove (14) to seal, on the one hand with the wall of the socket, preventing any infiltration of the gases generated by the combustion propellant charge (4), on the other hand with the inner wall of the tube, after firing.
  • the seal (16) also protrudes slightly beyond the junction plane of the launcher elements, so that the two launcher elements once assembled, are joined by their respective seals (16) which are strongly compressed l one against the other.
  • the protrusion beyond the external surface and beyond the junction plane is of the order of 0.3 to 0.5 mm in the case of hunting ammunition.
  • FIG 2 is a variant of the launcher of Figure 1 where the seal (17) is formed in an annular groove (18) whose bottom is pierced by openings (19) passing through the entire wall of the element (1) of the launcher. As shown in Figure 2, the seal (17) completely envelopes the launcher element (1) and has an edge (17a) projecting in the junction plane of the two launcher elements.
  • each launcher element (1) has a seal (20) placed in a groove (21) provided in the front part of the launcher. This groove is pierced by a series of perforations (22) passing through the wall of the launcher, ensuring the formation of the seal also on the internal wall of the launcher.
  • the seal (21) has a slightly flattened shape ensuring good sealing contact with the wall of the sleeve and the internal wall of the tube, in the launching phase.
  • the variant of improved waterproof launcher shown in Figure 4 comprises two seals, one (16) identical to that of Figure 1, arranged on the rear part of the element (1) of the launcher, the another (20) formed by overmolding in the annular groove (21) located in the front part of the launcher.
  • the bottom of this groove (21) has a series of perforations (22) passing through the thickness of the wall, and facilitating the overmolding of the thermoplastic elastomer or of the vulcanizable rubber which fills any the annular groove (21) over its entire length, penetrates into the perforations (22) and envelops the launcher in the plane of this groove.
  • a seal (23) can be provided on the seal (16).
  • This cover is preferably formed by molding the seal in thermoplastic elastomer or vulcanizable rubber and is an integral part thereof. Its height is such that the peripheral edge of the cover (23) is in contact with the internal wall of the sleeve (2) when the bullet is placed in the cartridge.
  • this seal (23) defines with the seal (16) and the wall of the sleeve an external annular chamber which is in the immediate vicinity of the propellant charge.
  • the cover (23) deforms, thereby causing the chamber containing the charge to communicate with the external annular chamber, and thus allowing the gas relaxation. This ensures a reduction in the recoil shock felt by the user of the weapon.
  • the variant embodiment shown in Figures 5a and 5b comprises the same launcher element (1) as in the previous Figures, but the seal (24) is fixed to the front end of the launcher (1), on its front part which it envelops by partially covering it.
  • the front part of the element (1) comprises an annular rib (25) crossed by several perforations, as well as three notches (26, 27, 28) transverse, intended to strengthen the attachment of the seal. (24) in natural or artificial rubber on the element (1) of the launcher.
  • the seal (24) completely covers the three notches but leaves the enlarged front face of the rib (25) visible.
  • a notch (26) is provided in the central part of the front part of the element (1) and the other two notches (27, 28) are provided at each of the two ends.
  • the seal (24) completely fills the volume of the notches (26, 27, 28) and protrudes slightly beyond the outer and inner surfaces of the element (1) and in the plane of junction of two elements (1) to ensure a good seal at the same time in the cartridge case, and in the barrel after firing.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Manipulator (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Gasket Seals (AREA)
  • Emergency Lowering Means (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Fishing Rods (AREA)
  • Pens And Brushes (AREA)

Abstract

The invention concerns ammunitions for weapons of all calibre. The launcher is designed for ammunitions comprising a launcher (1) associated with a sub-projectile (5) whereon it can be adapted, comprising one or several separable elements, and it includes at least a pad (16) continuously enclosing the outer surface and the inner surface of each element, the wall of each element being traversed by one or several perforations (15) making the pad integral with the launcher. The invention is in particular applicable to hunting and training weapons.

Description

LANCEUR A ETANCHEITE AMELIOREE POUR MUNITIONS DU TYPE COMPORTANT UN LANCEUR ASSOCIE A UN SOUS-PROJECTILE IMPROVED SEALING LAUNCHER FOR AMMUNITION OF THE TYPE COMPRISING A LAUNCHER ASSOCIATED WITH A SUB-PROJECTILE
La présente invention concerne les munitions pour armes de petit, moyen et gros calibre, et plus particulièrement un lanceur perfectionné à étanchéité améliorée, pour munitions du type comportant une balle sous-calibrée et un lanceur, notamment pour armes de chasse ou d'entraînement.The present invention relates to ammunition for small, medium and large caliber weapons, and more particularly to an improved launcher with improved sealing, for ammunition of the type comprising an undersized bullet and a launcher, in particular for hunting or training weapons.
Dans le domaine des armes de chasse et d'entraînement, on connaît les munitions à projectile sous-calibré associant un sous-projectile et un lanceur dont la fonction essentielle est de propulser le sous-projectile à la vitesse désirée.In the field of hunting and training weapons, we know that ammunition with a sub-calibrated projectile associates a sub-projectile and a launcher whose essential function is to propel the sub-projectile at the desired speed.
Les techniques de lancement fréquemment employées actuellement utilisent un lanceur généralement constitué de deux ou plusieurs éléments entourant le sous-projectile. Les éléments du lanceur, assemblés entre eux à plans jointifs par un système de verrouillage, peuvent être réalisés en alliages métalliques ou en matière plastique. Après mise à feu, les forces aérodynamiques qui s'exercent sur le projectile à la sortie de l'arme provoquent la séparation des éléments du lanceur qui, après séparation, suivent chacun une trajectoire propre et tombent à des distances variables de l'arme.The launch techniques frequently used today use a launcher generally consisting of two or more elements surrounding the sub-projectile. The elements of the launcher, assembled together in contiguous planes by a locking system, can be made of metal alloys or plastic. After firing, the aerodynamic forces exerted on the projectile at the exit of the weapon cause the separation of the elements of the launcher which, after separation, each follow their own trajectory and fall at varying distances from the weapon.
Par exemple, le brevet FR-A-2.555.728 décrit des munitions pour arme de chasse comportant un projectile sous- calibré stabilisé par empennage, comprenant une balle effilée en alliage dense associée à un lanceur en matière plastique.For example, patent FR-A-2,555,728 describes ammunition for hunting weapons comprising an under-calibrated projectile stabilized by empennage, comprising a tapered bullet of dense alloy associated with a launcher made of plastic.
Diverses variantes et améliorations ont été apportées à la technique décrite dans le brevet précité, et par exemple, les brevets FR-A-2.599.828 et FR-A-2.606.500 décrivent des balles de chasse du type comportant un sous-projectile et un lanceur en plusieurs éléments détachables, dont les caractéristiques sont améliorées. Ainsi, le brevet FR-A-2.599.828 décrit une balle à grande stabilité sur trajectoire, et procurant donc une bonne précision de tir, mais se déstabilisant au-delà d'une certaine distance. Le brevet FR-A-2.606.500 concerne des munitions procurant une vitesse initiale élevée et limitant la violence du choc de recul, constituée par une balle sous-calibrée et un lanceur au calibre de l'arme, comportant une chambre annulaire externe ouverte, séparée de la charge propulsive par une cloison susceptible de se rompre sous la pression des gaz engendrés par la combustion de la charge . L'une des difficultés auxquelles est confrontée cette technique de la balle sous-calibrée associée à un lanceur est celle de 1 ' étanchéité, et plus particulièrement l'étanchéité aux gaz propulsifs lors de la mise à feu de la charge. Bien que ces difficultés soient rencontrées tout particulièrement dans le cas des lanceurs en deux ou plusieurs éléments, le problème de l'étanchéité se pose aussi dans le cas des lanceurs monoblocs. De plus, il est indispensable que la présence du lanceur ne gêne pas les opérations d' encartouchage au cours desquelles le sous-projectile et le lanceur sont mis en place dans une cartouche comportant une douille amorcée et une charge de poudre propulsive.Various variants and improvements have been made to the technique described in the aforementioned patent, and for example, the patents FR-A-2,599,828 and FR-A-2,606,500 describe hunting bullets of the type comprising a sub-projectile and a launcher made of several detachable elements, the characteristics of which are improved. Thus, patent FR-A-2,599,828 describes a bullet with great stability on trajectory, and therefore providing good shooting precision, but destabilizing beyond a certain distance. Patent FR-A-2,606,500 relates to ammunition providing a high initial speed and limiting the violence of the recoil shock, constituted by an undersized bullet and a launcher of the caliber of the weapon, comprising an open external annular chamber, separated from the propellant charge by a partition liable to rupture under the pressure of the gases generated by the combustion of the charge. One of the difficulties faced by this technique of the sub-calibrated bullet associated with a launcher is that of sealing, and more particularly sealing against propellant gases when the charge is ignited. Although these difficulties are encountered very particularly in the case of launchers in two or more elements, the problem of sealing also arises in the case of monoblock launchers. In addition, it is essential that the presence of the launcher does not interfere with the cartridge-filling operations during which the sub-projectile and the launcher are placed in a cartridge comprising a primed cartridge case and a charge of propellant powder.
Cette étanchéité est généralement obtenue en utilisant un joint périphérique souple formant une ceinture autour des éléments du lanceur, comme par exemple dans le brevet FR-A- 2.694.081 où un joint annulaire périphérique est monté dans une gorge prévue dans la paroi externe du lanceur. Un autre exemple de joint annulaire périphérique est décrit dans la demande de brevet O-91.18256 où le joint est placé sur le sous-projectile, entre deux éléments de lanceur. Cependant, un tel joint doit être conçu de manière à se rompre à la sortie du tube de l'arme pour permettre la séparation des éléments du lanceur. Or il est difficile de mettre au point un joint d' étanchéité annulaire capable de se rompre sans perturber la séparation des éléments du lanceur et la trajectoire du projectile.This tightness is generally obtained by using a flexible peripheral seal forming a belt around the elements of the launcher, as for example in patent FR-A-2,694,081 where a peripheral annular seal is mounted in a groove provided in the external wall of the launcher . Another example of a peripheral annular seal is described in patent application O-91.18256 where the seal is placed on the sub-projectile, between two launching elements. However, such a seal must be designed so as to rupture at the outlet of the barrel of the weapon to allow the separation of the elements of the launcher. However, it is difficult to develop an annular seal capable of breaking without disturbing the separation of the elements of the launcher and the trajectory of the projectile.
De plus, l'étanchéité lors du stockage ou de la manipulation par l'utilisateur dans des conditions de chaleur ou d'humidité importantes, est délicate à obtenir, en particulier dans le cas des munitions du type balle flèche sous-calibrée. La présente invention a précisément pour objet un lanceur à étanchéité améliorée pour munitions du type comportant un lanceur associé à un sous-projectile sur lequel il peut s'adapter, comprenant un ou plusieurs éléments et au moins un joint d' étanchéité périphérique.In addition, the seal during storage or handling by the user in conditions of high heat or humidity, is difficult to obtain, in particular in the case of ammunition of the bullet type bullet sub-calibrated. The present invention specifically relates to a launcher with improved sealing for ammunition of the type comprising a launcher associated with a sub-projectile on which it can adapt, comprising one or more elements and at least one peripheral seal.
L'invention a également pour objet un lanceur pour munitions du type comportant un lanceur associé à un sous-projec- tile sur lequel il peut s'adapter, procurant à la fois une étanchéité améliorée vis-à-vis des gaz de combustion et une réduction du choc en recul de l'arme.A subject of the invention is also a launcher for ammunition of the type comprising a launcher associated with a sub-projectile on which it can be adapted, providing both an improved seal against combustion gases and a reduction of the recoil shock of the weapon.
L'invention a encore pour objet une balle complète constituée par un projectile sous-calibré associé à un lanceur, et comportant un joint d'étanchéité optimisé.The invention also relates to a complete bullet consisting of an under-calibrated projectile associated with a launcher, and comprising an optimized seal.
Le lanceur suivant la présente invention se distingue en ce qu'il comporte au moins un joint d'étanchéité ceinturant de manière continue la face externe et la face interne de chaque élément, chaque joint étant constitué de préférence d'une seule pièce.The launcher according to the present invention is distinguished in that it comprises at least one seal continuously encircling the external face and the internal face of each element, each seal preferably consisting of a single piece.
Suivant une forme préférentielle de réalisation, la paroi de chaque élément du lanceur est traversée par une ou plusieurs perforations assurant la solidarisâtion du joint, et le lanceur de l'invention comprend de préférence au moins deux éléments séparables.According to a preferred embodiment, the wall of each element of the launcher is crossed by one or more perforations ensuring the joining of the joint, and the launcher of the invention preferably comprises at least two separable elements.
Plus particulièrement, le joint recouvre au moins en partie non seulement la face externe, mais aussi la face interne et le chant du plan de jonction de chaque élément de lanceur, et il a une épaisseur telle qu'il dépasse au-delà de la surface externe, de la surface interne, et du plan de jonction, d'une distance comprise entre 0 et 1 mm, et de préférence entre 0,1 et 0,5 mm dans le cas des munitions de chasse. Le joint peut être formé sur chaque élément du lanceur par moulage en un matériau souple choisi parmi les caoutchoucs naturels ou artificiels, et par exemple en caoutchouc vulcani- sable ou en élastomère thermoplastique, présentant de préférence une excellente adhérence sur la matière constituant le lanceur, et contenant le cas échéant des charges usuelles destinées à en améliorer les propriétés mécaniques, par exem- pie un agent anti-ultraviolet améliorant la résistance au vieillissement ou un agent lubrifiant destiné à faciliter le glissement contre la paroi du tube de l'arme. La dureté du caoutchouc utilisé est choisie en fonction des conditions d'utilisation, et elle est généralement comprise entre 20 et 120 (dureté Shore) , et de préférence entre 50 et 90.More particularly, the joint covers at least in part not only the external face, but also the internal face and the edge of the junction plane of each launcher element, and it has a thickness such that it exceeds beyond the surface. external, of the internal surface, and of the junction plane, from a distance between 0 and 1 mm, and preferably between 0.1 and 0.5 mm in the case of hunting ammunition. The seal can be formed on each element of the launcher by molding in a flexible material chosen from natural or artificial rubbers, and for example in vulcanizable rubber or in thermoplastic elastomer, preferably having excellent adhesion to the material constituting the launcher, and containing, where appropriate, usual fillers intended to improve the mechanical properties thereof, for example an anti-ultraviolet agent improving resistance to aging or a lubricating agent intended to facilitate sliding against the wall of the barrel of the weapon. The hardness of the rubber used is chosen according to the conditions of use, and it is generally between 20 and 120 (Shore hardness), and preferably between 50 and 90.
Afin d'assurer une parfaite solidarisation du joint et de l'élément du lanceur sur lequel il est fixé, la paroi de chaque élément est traversée par une ou plusieurs perforations laissant passer la matière lors du moulage du joint.To ensure perfect attachment of the seal and the element of the launcher on which it is fixed, the wall of each element is crossed by one or more perforations allowing the material to pass during the molding of the seal.
Bien entendu, il est possible de prévoir un seul joint par élément de lanceur, ou plusieurs joints disposés séparément sur le même élément, par exemple un premier joint sur la partie avant et un deuxième joint sur la partie arrière de 1 ' élément .Of course, it is possible to provide a single seal per launcher element, or several seals arranged separately on the same element, for example a first seal on the front part and a second seal on the rear part of the element.
Le joint disposé sur la partie arrière de l'élément de lanceur comporte de préférence un opercule annulaire obturant l'espace entre le lanceur et la paroi interne de la douille, délimitant une chambre annulaire externe au voisinage immédiat de la charge. Lors de la mise à feu et de la phase propulsive, sous l'action de la montée en pression des gaz de combustion, cet opercule se déforme, provoquant la mise en communication de la chambre contenant la charge avec la chambre annulaire externe, et permettant ainsi la détente des gaz. Il en résulte une réduction du choc en recul ressenti par l'utilisateur de l'arme, ainsi qu'une optimisation de la vitesse de combustion de la poudre.The seal disposed on the rear part of the launcher element preferably comprises an annular seal closing the space between the launcher and the internal wall of the sleeve, delimiting an external annular chamber in the immediate vicinity of the load. During firing and the propellant phase, under the action of the increase in pressure of the combustion gases, this cover deforms, causing the chamber containing the charge to communicate with the external annular chamber, and allowing thus the relaxation of the gases. This results in a reduction in the recoil shock felt by the user of the weapon, as well as an optimization of the speed of combustion of the powder.
Lorsque le lanceur comporte un seul joint, celui-ci est placé de préférence sur la partie avant de chaque élément. En effet, les essais effectués avec les munitions conformes à l'invention ont montré que cette disposition facilite les opérations d' encartouchage.When the launcher has a single seal, it is preferably placed on the front part of each element. In fact, the tests carried out with the ammunition in accordance with the invention have shown that this arrangement facilitates the cartoning operations.
Par "partie avant" au sens de l'invention, on entend la zone constituée approximativement par la moitié du lanceur se trouvant vers l'avant du projectile. Le joint conforme à la présente invention est placé de préférence dans cette partie avant, et plus préférentiellement à une distance du bord avant du lanceur représentant moins de 30% de la longueur du lanceur.By "front part" within the meaning of the invention means the area formed approximately by half of the launcher located towards the front of the projectile. The seal according to the present invention is preferably placed in this front part, and more preferably at a distance from the front edge of the launcher representing less than 30% of the length of the launcher.
En particulier, dans le cas d'un joint unique optimisé, disposé en partie avant, il est possible de réunir les éléments du lanceur de manière à obtenir un lanceur monobloc ou équivalent, comportant un joint d'étanchéité dans la partie avant, à proximité de son extrémité avant. Cette position du joint peut paraître surprenante compte tenu des techniques connues usuelles en la matière, où les systèmes d'étanchéité, de formes diverses, sont toujours placés dans la partie arrière du lanceur ou du projectile, au niveau du cône de forcement, afin de limiter les problèmes de mise à poste des munitions .In particular, in the case of a single optimized joint, disposed at the front, it is possible to combine the elements of the launcher so as to obtain a one-piece launcher or equivalent, having a seal in the front part, near its front end. This position of the seal may seem surprising given the usual known techniques in the field, where the sealing systems, of various shapes, are always placed in the rear part of the launcher or projectile, at the forcing cone, in order to limit the problems of placing ammunition.
Suivant une variante conforme à l'invention, la partie du lanceur se trouvant en avant du joint peut être indépendante de l'autre partie. Dans le cas d'un lanceur cylindrique, celui-ci est alors constitué de deux éléments cylindriques disposés longitudinalement sur le même axe et séparés par le joint d'étanchéité fixé sur le bord de l'un des deux éléments. Suivant une autre variante de l'invention, le joint est disposé à l'extrémité avant du lanceur, dont il enveloppe la face frontale, celle-ci comportant de préférence des échan- crures transversales facilitant l'accrochage du joint sur le lanceur et l'assemblage des éléments lorsque le lanceur est en deux ou plusieurs éléments.According to a variant according to the invention, the part of the launcher located in front of the joint can be independent of the other part. In the case of a cylindrical launcher, it then consists of two cylindrical elements arranged longitudinally on the same axis and separated by the seal attached to the edge of one of the two elements. According to another variant of the invention, the seal is arranged at the front end of the launcher, of which it envelops the front face, the latter preferably comprising transverse notches facilitating the attachment of the seal to the launcher and the 'assembly of the elements when the launcher is in two or more elements.
Le lanceur à étanchéité améliorée conforme à la présente invention peut être réalisé en métal ou en alliage métallique, par exemple en alliage d'aluminium, ou encore en matière plastique fabriquée par moulage ou par injection, par exemple en polyamide.The launcher with improved sealing in accordance with the present invention can be made of metal or of a metal alloy, for example of aluminum alloy, or alternatively of plastic material produced by molding or by injection, for example of polyamide.
L'invention concerne aussi un procédé permettant de fabriquer un lanceur à étanchéité améliorée pour munitions du type comportant un lanceur associé à un sous-projectile, comprenant un ou plusieurs éléments comportant chacun un joint d'étanchéité souple intégré.The invention also relates to a method for manufacturing a launcher with improved sealing for ammunition of the type comprising a launcher associated with a sub-projectile, comprising one or more elements each comprising an integrated flexible seal.
Conformément au procédé suivant la présente invention, on effectue un surmoulage par injection d'élastomère thermoplastique ou de caoutchouc vulcanisable directement sur chaque élément du lanceur, sur une partie de la paroi du lanceur traversée par des perforations.According to the process according to the present invention, an overmolding by injection of thermoplastic elastomer or vulcanizable rubber is carried out directly on each element of the launcher, on a part of the wall of the launcher crossed by perforations.
Le dispositif conforme à la présente invention est applicable dans toutes munitions, de petit, moyen ou gros calibre, du type comportant un projectile sous-calibré, par exemple une balle sous-calibrée, et un lanceur constitué d'un ou plusieurs éléments séparables, dans le domaine des armes de chasse, de sport ou d'entraînement, et de préférence dans celui des armes de chasse. Ce dispositif est inséré dans un ensemble constitué par une cartouche, qui se compose de : une douille amorcée; une charge de poudre propulsive; une balle complète comprenant un lanceur selon 1 ' in- vention, au calibre de l'arme, et une balle sous-calibrée.The device according to the present invention is applicable in all ammunition, of small, medium or large caliber, of the type comprising an under-calibrated projectile, for example a sub-calibrated bullet, and a launcher made up of one or more separable elements, in the field of hunting, sport or training weapons, and preferably in that of hunting weapons. This device is inserted in an assembly constituted by a cartridge, which consists of: a primed socket; a charge of propellant powder; a complete bullet comprising a launcher according to the invention, of the caliber of the weapon, and a sub-calibrated bullet.
Outre une excellente étanchéité statique de la cartouche lors du stockage et de la manipulation, et une excellente étanchéité dynamique aux gaz propulsifs lors de la mise à feu, la présente invention procure l'avantage de diminuer l' écart- type de pression et de vitesse, et par conséquent de diminuer la dispersion du tir. De plus, on ne constate aucune perturbation de la trajectoire du sous-projectile.In addition to an excellent static seal of the cartridge during storage and handling, and an excellent dynamic seal against propellant gases during ignition, the present invention provides the advantage of reducing the standard deviation of pressure and speed. , and therefore to decrease the dispersion of the shot. In addition, there is no disturbance in the trajectory of the sub-projectile.
Les diverses caractéristiques et avantages de la présente invention apparaîtront plus clairement dans la description ci- après relative à des formes préférentielles de réalisation, en référence aux dessins annexés, qui représentent :The various characteristics and advantages of the present invention will appear more clearly in the description below relating to preferred embodiments, with reference to the appended drawings, which represent:
Figure 1 : une vue en demi-coupe d'une balle complète, comprenant une balle sous-calibrée et un lanceur à étanchéité améliorée conforme à l'invention. Figure 2 : une vue en demi-coupe montrant une deuxième forme de réalisation du lanceur suivant l'invention, comportant un joint d'étanchéité en partie arrière.Figure 1: a half-section view of a complete bullet, comprising an undersized bullet and a launcher with improved sealing according to the invention. Figure 2: a half-section view showing a second embodiment of the launcher according to the invention, comprising a seal in the rear part.
Figure 3 : une vue en demi-coupe montrant une autre forme de réalisation du lanceur suivant l'invention, comportant un joint d'étanchéité en partie avant.Figure 3: a half-section view showing another embodiment of the launcher according to the invention, comprising a seal in the front part.
Figure 4 : une vue en demi-coupe montrant une autre forme de réalisation du lanceur suivant l'invention, comportant deux joints d'étanchéité.Figure 4: a half-section view showing another embodiment of the launcher according to the invention, comprising two seals.
Figure 5a : une vue de face d'une variante de lanceur de l'invention comportant un joint en partie avant, correspondant à la forme de réalisation de la Figure 5b.Figure 5a: a front view of a variant of the launcher of the invention comprising a seal in the front part, corresponding to the embodiment of Figure 5b.
Figure 5b : une vue partielle en coupe suivant A-A du lanceur de la Figure 5a. La Figure 1 représente, en demi-vue, une cartouche comprenant un élément de lanceur (1) de forme sensiblement hémicylindrique, une douille (2), une amorce (3) et une charge propulsive (4) . La forme de la paroi interne du lanceur (1) est destinée à s'adapter de manière connue sur le corps de la balle sous-calibrée (5) du type balle-flèche. A cet effet, la face interne du lanceur comporte des adents (6) coopérant avec des rainures (7) formées sur le corps de la balle (5) .Figure 5b: a partial sectional view along AA of the launcher of Figure 5a. Figure 1 shows, in half-view, a cartridge comprising a launcher element (1) of substantially semi-cylindrical shape, a cartridge case (2), a primer (3) and a propellant charge (4). The shape of the internal wall of the launcher (1) is intended to adapt in known manner to the body of the sub-calibrated bullet (5) of the arrow-bullet type. To this end, the internal face of the launcher has teeth (6) cooperating with grooves (7) formed on the body of the ball (5).
Le lanceur présente sur sa face externe des gorges annu- laires de section sensiblement semi-circulaire (8 et 9) formant gorges de décompression, et limitant la surface de frottement dans le tube de l'arme.The launcher has on its external face annular grooves of substantially semi-circular section (8 and 9) forming decompression grooves, and limiting the friction surface in the barrel of the weapon.
La partie avant (10) du lanceur comporte une surface interne conique (11) de diamètre s ' élargissant de l'arrière vers l'avant, afin de faciliter la séparation de l'élément de lanceur sous l'effet des forces aérodynamiques s ' exerçant à la sortie du tube de l'arme.The front part (10) of the launcher has a conical internal surface (11) of diameter widening from the rear towards the front, in order to facilitate the separation of the launcher element under the effect of the aerodynamic forces s' exerting at the exit of the barrel of the weapon.
La partie arrière (12) comporte une jupe annulaire (13) ainsi qu'une gorge (14), au niveau du raccordement avec le corps de l'élément de lanceur. La jupe (13) est traversée par deux séries de perforations (15) disposées dans un plan transversal, chaque série pouvant comporter par exemple 3 ou 4 perforations dans la paroi du lanceur.The rear part (12) has an annular skirt (13) and a groove (14), at the level of the connection with the body of the launcher element. The skirt (13) is crossed by two series of perforations (15) arranged in a transverse plane, each series can include, for example, 3 or 4 perforations in the wall of the launcher.
Comme le montre la Figure 1, la jupe annulaire (13) est tronquée à ses deux extrémités de telle sorte que sa section ne soit pas tout à fait hémicirculaire mais couvre un arc de cercle d'environ 170°; ainsi les deux éléments de lanceur (1) mis en place ne sont pas jointifs par les bords de leurs jupes annulaires respectives (13) mais un espace est ménagé entre elles, dans lequel prend place le joint d'étanchéité comme indiqué ci-après.As shown in Figure 1, the annular skirt (13) is truncated at its two ends so that its section is not entirely semi-circular but covers an arc of approximately 170 °; thus the two launcher elements (1) put in place are not joined by the edges of their respective annular skirts (13) but a space is provided between them, in which the seal takes place as indicated below.
Le joint d'étanchéité (16) enveloppe toute la jupe annulaire (13) et la gorge (14), et le caoutchouc naturel ou artificiel qui le constitue remplit les perforations (15) traver- sant la paroi. Il dépasse légèrement au-delà de la surface externe du lanceur (1) , au-dessus de la gorge (14) pour assurer l'étanchéité, d'une part avec la paroi de la douille, empêchant toute infiltration des gaz générés par la combustion de la charge propulsive (4), d'autre part avec la paroi interne du tube, après mise à feu. Le joint (16) dépasse aussi légèrement au-delà du plan de jonction des éléments de lanceur, de telle sorte que les deux éléments de lanceur une fois assemblés, soient jointifs par leur joints d'étanchéité (16) respectifs qui sont fortement comprimés l'un contre l'autre. Le dépassement au-delà de la surface externe et au-delà du plan de jonction est de l'ordre de 0,3 à 0,5 mm dans le cas de munitions de chasse. La forme de réalisation représentée sur la Figure 2 est une variante du lanceur de la Figure 1 où le joint d'étanchéité (17) est formé dans une gorge annulaire (18) dont le fond est percé par des ouvertures (19) traversant toute la paroi de l'élément (1) du lanceur. Comme le montre la Figure 2, le joint d'étanchéité (17) enveloppe totalement l'élément de lanceur (1) et possède un bord (17a) dépassant dans le plan de jonction des deux éléments de lanceur.The seal (16) envelops the entire annular skirt (13) and the groove (14), and the natural or artificial rubber which constitutes it fills the perforations (15) passing through the wall. It projects slightly beyond the external surface of the launcher (1), above the groove (14) to seal, on the one hand with the wall of the socket, preventing any infiltration of the gases generated by the combustion propellant charge (4), on the other hand with the inner wall of the tube, after firing. The seal (16) also protrudes slightly beyond the junction plane of the launcher elements, so that the two launcher elements once assembled, are joined by their respective seals (16) which are strongly compressed l one against the other. The protrusion beyond the external surface and beyond the junction plane is of the order of 0.3 to 0.5 mm in the case of hunting ammunition. The embodiment shown in Figure 2 is a variant of the launcher of Figure 1 where the seal (17) is formed in an annular groove (18) whose bottom is pierced by openings (19) passing through the entire wall of the element (1) of the launcher. As shown in Figure 2, the seal (17) completely envelopes the launcher element (1) and has an edge (17a) projecting in the junction plane of the two launcher elements.
Dans la forme de réalisation représentée sur la Figure 3, chaque élément de lanceur (1) comporte un joint d'étanchéité (20) mis en place dans une gorge (21) prévue dans la partie avant du lanceur. Cette gorge est percée par une série de perforations (22) traversant la paroi du lanceur, assurant la formation du joint également sur la paroi interne du lanceur. Le joint (21) présente une forme légèrement aplatie assurant un bon contact d'étanchéité avec la paroi de la douille et la paroi interne du tube, dans la phase de lancement.In the embodiment shown in Figure 3, each launcher element (1) has a seal (20) placed in a groove (21) provided in the front part of the launcher. This groove is pierced by a series of perforations (22) passing through the wall of the launcher, ensuring the formation of the seal also on the internal wall of the launcher. The seal (21) has a slightly flattened shape ensuring good sealing contact with the wall of the sleeve and the internal wall of the tube, in the launching phase.
La variante de lanceur à étanchéité améliorée représentée sur la Figure 4 comprend deux joints d'étanchéité, l'un (16) identique à celui de la Figure 1, disposé sur la partie arrière de l'élément (1) du lanceur, l'autre (20) formé par surmoulage dans la gorge annulaire (21) se trouvant dans la partie avant du lanceur. Comme sur la Figure 3, le fond de cette gorge (21) comporte une série de perforations (22) traversant l'épaisseur de la paroi, et facilitant le surmou- lage de l'élastomère thermoplastique ou du caoutchouc vulcani- sable qui remplit toute la gorge annulaire (21) sur toute sa longueur, pénètre dans les perforations (22) et enveloppe le lanceur dans le plan de cette gorge. Pour améliorer l'étanchéité, un opercule (23) peut être prévu sur le joint (16) . Cet opercule est de préférence formé par moulage du joint en élastomère thermoplastique ou en caoutchouc vulcanisable et en fait partie intégrante. Sa hauteur est telle que le bord périphérique de l'opercule (23) soit en contact avec la paroi interne de la douille (2) lorsque la balle est mise en place dans la cartouche. De plus, cet opercule (23) définit avec le joint (16) et la paroi de la douille une chambre annulaire externe qui se trouve au voisi- nage immédiat de la charge propulsive. Lors de la mise à feu, sous l'action de la pression des gaz de combustion, l'opercule (23) se déforme, provoquant alors la mise en communication de la chambre contenant la charge avec la chambre annulaire externe, et permettant ainsi la détente des gaz. Ceci assure une réduction du choc en recul ressenti par l'utilisateur de 1 ' arme .The variant of improved waterproof launcher shown in Figure 4 comprises two seals, one (16) identical to that of Figure 1, arranged on the rear part of the element (1) of the launcher, the another (20) formed by overmolding in the annular groove (21) located in the front part of the launcher. As in FIG. 3, the bottom of this groove (21) has a series of perforations (22) passing through the thickness of the wall, and facilitating the overmolding of the thermoplastic elastomer or of the vulcanizable rubber which fills any the annular groove (21) over its entire length, penetrates into the perforations (22) and envelops the launcher in the plane of this groove. To improve the seal, a seal (23) can be provided on the seal (16). This cover is preferably formed by molding the seal in thermoplastic elastomer or vulcanizable rubber and is an integral part thereof. Its height is such that the peripheral edge of the cover (23) is in contact with the internal wall of the sleeve (2) when the bullet is placed in the cartridge. In addition, this seal (23) defines with the seal (16) and the wall of the sleeve an external annular chamber which is in the immediate vicinity of the propellant charge. During firing, under the action of the pressure of the combustion gases, the cover (23) deforms, thereby causing the chamber containing the charge to communicate with the external annular chamber, and thus allowing the gas relaxation. This ensures a reduction in the recoil shock felt by the user of the weapon.
La variante de réalisation représentée sur les Figures 5a et 5b comprend le même élément de lanceur (1) que sur les Figures précédentes, mais le joint d'étanchéité (24) est fixé à l'extrémité avant du lanceur (1), sur sa partie frontale qu'il enveloppe en la recouvrant partiellement. A cet effet, la partie frontale de l'élément (1) comprend une nervure annulaire (25) traversée par plusieurs perforations, ainsi que trois échancrures (26, 27, 28) transversales, destinées à renforcer l'accrochage du joint d'étanchéité (24) en caoutchouc naturel ou artificiel sur l'élément (1) du lanceur. Le joint (24) recouvre totalement les trois échancrures mais laisse apparente la face avant élargie de la nervure (25) .The variant embodiment shown in Figures 5a and 5b comprises the same launcher element (1) as in the previous Figures, but the seal (24) is fixed to the front end of the launcher (1), on its front part which it envelops by partially covering it. For this purpose, the front part of the element (1) comprises an annular rib (25) crossed by several perforations, as well as three notches (26, 27, 28) transverse, intended to strengthen the attachment of the seal. (24) in natural or artificial rubber on the element (1) of the launcher. The seal (24) completely covers the three notches but leaves the enlarged front face of the rib (25) visible.
Comme le montre la Figure 5a, une échancrure (26) est prévue dans la partie centrale de la partie frontale de l'élément (1) et les deux autres échancrures (27, 28) sont prévues à chacune des deux extrémités .As shown in Figure 5a, a notch (26) is provided in the central part of the front part of the element (1) and the other two notches (27, 28) are provided at each of the two ends.
Comme le montrent les Figures 5a et 5b, le joint (24) remplit totalement le volume des échancrures (26, 27, 28) et déborde légèrement au-delà des surfaces extérieure et intérieure de l'élément (1) et dans le plan de jonction de deux éléments (1) afin d'assurer une bonne étanchéité à la fois dans la douille de la cartouche, et dans le tube de l'arme après mise à feu. As shown in Figures 5a and 5b, the seal (24) completely fills the volume of the notches (26, 27, 28) and protrudes slightly beyond the outer and inner surfaces of the element (1) and in the plane of junction of two elements (1) to ensure a good seal at the same time in the cartridge case, and in the barrel after firing.

Claims

REVENDICATIONS
1. Lanceur pour munitions du type comportant un lanceur (1) associé à un sous-projectile (5) sur lequel il peut s'adapter, comprenant un ou plusieurs éléments séparables et au moins un joint d'étanchéité, caractérisé en ce qu'il comporte au moins un joint d'étanchéité (16,17,20) ceinturant de manière continue la face externe et la face interne de chaque élément .1. Launcher for ammunition of the type comprising a launcher (1) associated with a sub-projectile (5) on which it can be adapted, comprising one or more separable elements and at least one seal, characterized in that it comprises at least one seal (16, 17, 20) continuously encircling the external face and the internal face of each element.
2. Lanceur selon la revendication 1, caractérisé en ce que la paroi de chaque élément est traversée par une ou plusieurs perforations (15,19,22) assurant la solidarisation du joint.2. Launcher according to claim 1, characterized in that the wall of each element is crossed by one or more perforations (15,19,22) ensuring the joining of the joint.
3. Lanceur selon l'une quelconque des revendications 1 et 2, caractérisé en ce qu'il comprend au moins deux éléments séparables . 3. Launcher according to any one of claims 1 and 2, characterized in that it comprises at least two separable elements.
4. Lanceur selon la revendication 3, caractérisé en ce que le joint recouvre au moins en partie la face interne, la face externe et le chant du plan de jonction de chaque élément de lanceur .4. Launcher according to claim 3, characterized in that the seal covers at least partially the internal face, the external face and the edge of the junction plane of each launcher element.
5. Lanceur selon la revendication 4, caractérisé en que le joint dépasse au-delà de la face externe, de la face interne, et du plan de jonction, d'une distance comprise entre 0 et 1 mm.5. Launcher according to claim 4, characterized in that the joint protrudes beyond the outer face, the inner face, and the junction plane, by a distance between 0 and 1 mm.
6. Lanceur selon l'une quelconque des revendications précédentes, caractérisé en ce que le joint est formé par moulage en un matériau souple choisi parmi les caoutchoucs naturels ou artificiels.6. Launcher according to any one of the preceding claims, characterized in that the seal is formed by molding in a flexible material chosen from natural or artificial rubbers.
7. Lanceur selon l'une quelconque des revendications précédentes, caractérisé en ce que le joint (16) disposé sur la partie arrière de l'élément de lanceur comporte un opercule transversal (23) obturant l'espace entre le lanceur et la paroi interne de la douille, délimitant une chambre annulaire externe au voisinage immédiat de la charge.7. Launcher according to any one of the preceding claims, characterized in that the seal (16) disposed on the rear part of the launcher element comprises a transverse cover (23) closing the space between the launcher and the internal wall of the socket, delimiting an external annular chamber in the immediate vicinity of the load.
8. Lanceur selon l'une quelconque des revendications 1 à 6, caractérisé en ce que chaque élément comporte un joint (20) disposé sur sa partie avant. 8. Launcher according to any one of claims 1 to 6, characterized in that each element comprises a seal (20) disposed on its front part.
9. Lanceur selon la revendication 8, caractérisé en ce que le joint (24) enveloppe la face frontale du lanceur.9. Launcher according to claim 8, characterized in that the seal (24) envelops the front face of the launcher.
10. Lanceur selon la revendication 9, caractérisé en ce qu'il présente des échancrures transversales (26,27,28) sur sa face frontale.10. Launcher according to claim 9, characterized in that it has transverse notches (26,27,28) on its front face.
11. Lanceur selon la revendication 8, caractérisé en ce qu'il est constitué par un seul élément comportant un joint en partie avant.11. Launcher according to claim 8, characterized in that it consists of a single element comprising a seal in the front part.
12. Lanceur selon la revendication 3, caractérisé en ce qu'il est constitué de deux éléments identiques disposés symétriquement par rapport à l'axe longitudinal.12. Launcher according to claim 3, characterized in that it consists of two identical elements arranged symmetrically with respect to the longitudinal axis.
13. Lanceur selon la revendication 6, caractérisé en ce que le joint est réalisé en élastomère thermoplastique ou en caoutchouc vulcanisable et que le lanceur est en polyamide 14. Procédé de fabrication d'un lanceur pour munitions selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on effectue un surmoulage par injection d' élastomère thermoplastique ou de caoutchouc vulcanisable directement sur chaque élément du lanceur, sur une partie de la paroi du lanceur traversée par des perforations. 13. Launcher according to claim 6, characterized in that the seal is made of thermoplastic elastomer or of vulcanizable rubber and that the launcher is of polyamide 14. A method of manufacturing a launcher for ammunition according to any one of the preceding claims, characterized in that an overmolding by injection of thermoplastic elastomer or vulcanizable rubber is carried out directly on each element of the launcher, on a part of the wall of the launcher crossed by perforations.
EP98947606A 1997-10-13 1998-10-06 Launcher with enhanced tightness for ammunitions comprising a launcher associated with a sub-projectile Expired - Lifetime EP1023573B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9712754 1997-10-13
FR9712754A FR2769700B1 (en) 1997-10-13 1997-10-13 IMPROVED SEALING LAUNCHER FOR AMMUNITION OF THE TYPE COMPRISING A LAUNCHER ASSOCIATED WITH A SUB-PROJECTILE
PCT/FR1998/002127 WO1999019685A1 (en) 1997-10-13 1998-10-06 Launcher with enhanced tightness for ammunitions comprising a launcher associated with a sub-projectile

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EP1023573A1 true EP1023573A1 (en) 2000-08-02
EP1023573B1 EP1023573B1 (en) 2002-01-02

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EP (1) EP1023573B1 (en)
AT (1) ATE211539T1 (en)
AU (1) AU9446198A (en)
CA (1) CA2305549C (en)
DE (1) DE69803401T2 (en)
ES (1) ES2169927T3 (en)
FR (1) FR2769700B1 (en)
PT (1) PT1023573E (en)
WO (1) WO1999019685A1 (en)

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Publication number Priority date Publication date Assignee Title
US2672814A (en) * 1949-10-07 1954-03-23 Schlumberger Well Surv Corp Fluid sealing and burr elimination projectile for perforator guns
US4187783A (en) * 1978-03-13 1980-02-12 The United States Of America As Represented By The Secretary Of The Army Discarding sabot munition
FR2555728B1 (en) 1983-11-29 1987-03-20 Sauvestre Jean Claude HUNTING WEAPON AMMUNITION
DE3617415C2 (en) * 1986-05-23 1995-09-07 Mauser Werke Oberndorf Sub-caliber sabot bullet
FR2606500B1 (en) 1986-06-05 1990-07-06 Sauvestre Jean Claude HUNTING AMMUNITION WITH INCREASED COMBUSTION VOLUME
FR2599828B1 (en) 1986-06-05 1990-08-24 Sauvestre Jean Claude SMALL OR MEDIUM CALIBER AMMUNITION WITH IMPROVED EFFICIENCY AND LIMITED RANGE, ESPECIALLY FOR HUNTING
FR2662241B1 (en) * 1990-05-19 1994-09-23 Sauvestre Jean Claude TANDEM LAUNCHING SYSTEM WITH CENTRAL SEALING.
FR2708730B1 (en) * 1993-08-06 1995-10-20 Sauvestre Jean Claude Launcher with controlled separation of elements for ammunition.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9919685A1 *

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Publication number Publication date
FR2769700A1 (en) 1999-04-16
CA2305549A1 (en) 1999-04-22
CA2305549C (en) 2007-06-05
EP1023573B1 (en) 2002-01-02
DE69803401T2 (en) 2002-08-01
PT1023573E (en) 2002-06-28
WO1999019685A1 (en) 1999-04-22
ATE211539T1 (en) 2002-01-15
ES2169927T3 (en) 2002-07-16
AU9446198A (en) 1999-05-03
DE69803401D1 (en) 2002-02-28
FR2769700B1 (en) 1999-12-24

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