EP0687884A1 - Sleeve for preventing bowing - Google Patents

Sleeve for preventing bowing Download PDF

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Publication number
EP0687884A1
EP0687884A1 EP95401236A EP95401236A EP0687884A1 EP 0687884 A1 EP0687884 A1 EP 0687884A1 EP 95401236 A EP95401236 A EP 95401236A EP 95401236 A EP95401236 A EP 95401236A EP 0687884 A1 EP0687884 A1 EP 0687884A1
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EP
European Patent Office
Prior art keywords
tube
sleeve according
arcuate sleeve
ring
envelope
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
EP95401236A
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German (de)
French (fr)
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EP0687884B1 (en
Inventor
Patrick Balbo
Fabienne Mandereau
Philippe Grelat
Guy Malassenet
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.)
Giat Industries SA
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Giat Industries SA
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Publication date
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Publication of EP0687884A1 publication Critical patent/EP0687884A1/en
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/44—Insulation jackets; Protective jackets

Definitions

  • the technical field of the present invention is that of anti-arcuate sleeves for large caliber artillery tube.
  • the main function of the anti-bending sleeve is to limit the bending, that is to say the deformation of the tube, due to external conditions: rain, heating for example, which cause a modification of the temperature of the tube in one direction. other than that of its axis.
  • a temperature gradient between the upper part and the lower part of the tube generates a deformation of the latter and affects the accuracy of the shot.
  • Patent FR-A-1 445 546 describes a device for preventing the arching of a barrel according to which an envelope is placed around the tube at a certain distance from this one. This creates a fluid mattress within which the temperature differences cause convection phenomena which restore thermal uniformity. However, no precise structure is described for fixing this envelope on the tube.
  • the object of the present invention is to provide an anti-arcuate sleeve making it possible to overcome the drawbacks of the prior art by reducing its mass and minimizing the temperature gradient surrounding the tube.
  • the invention proposes an anti-arcuate sleeve for a large caliber artillery tube, consisting of an envelope, surrounding the tube at a distance and whose length is substantially equal to that of the emerging part of the tube, characterized in that it comprises a front ring fixed near the free end of the tube and a rear ring fixed at the level of the smoke box of the tube, and in that the casing is in the form of two half shells assembled by means of connection.
  • each ring is provided with a groove for receiving the envelope.
  • the anti-arcuate sleeve comprises at least one intermediate ring disposed substantially at the middle part of the envelope, this ring being provided on either side with a groove receiving the end of the two envelope elements, this ring being applied directly to the tube by clamping.
  • an insulating washer for example made of rubber, is arranged between the intermediate ring and the tube.
  • each intermediate ring being provided with longitudinal holes making the sub-assemblies defined by the casing communicate, the front and rear rings and the intermediate ring or rings.
  • each half-shell has a semi-circular profile in section
  • the envelope has a conical profile, the large base of which is formed by the rear ring
  • the half-shells, the H, L profiles. and ⁇ are produced using sheets using a folding technique.
  • An advantage of the present invention lies in the implementation of simple manufacturing techniques excluding any molding, machining or mechanical welding operation, leading to a reduction in manufacturing costs.
  • Another advantage of the invention lies in the fact that the sleeve resists recoil accelerations greater than 5000 m / s2.
  • Yet another advantage of the invention lies in the possibility of partial or total replacement of the sleeve without affecting the characteristics of the tube itself.
  • Yet another advantage of the invention lies in the fact that elements of the sleeve have an identical structure.
  • Figure 1 shows an artillery tube 1 provided with a smoke box 2, terminated by a muzzle brake 3 towards the front.
  • the tube 1 conventionally extends the barrel chamber and need not be described more fully. However, it has a generally frustoconical shape between the smoke box 2 and the muzzle brake 3, the large base being located towards the smoke box.
  • an anti-arcuate sleeve 4 of which the primary objective is to limit the deformations of the tube detrimental to the performance of the weapon.
  • the anti-arcuate sleeve 4 comprises a rear ring 5 and a front ring 6 between which is a spacer 7.
  • the rear ring 5 is guided over a bearing surface produced on the smoke box 2.
  • the front ring 6 is held in a groove made on the tube.
  • the front ring 6 can be fixed at any distance from the rear ring 5 depending on the characteristics sought by those skilled in the art. It is preferred, according to the invention, to fix the front ring 6 as close as possible to the muzzle brake 3.
  • the casing 7 is placed at a distance from the tube 1 and can completely or partially surround said tube.
  • the casing 7 completely surrounds the tube 1 and has a generally frustoconical shape similar to that of the tube, this embodiment being chosen for reasons of convenience.
  • the envelope 7 is made up of two half-shells 8 and 9 joined by an H-shaped connection means 10 at their adjacent edges, and held by collars 11.
  • Each half-shell 8 and 9 can be reinforced by external and / or internal reinforcement means.
  • FIG. 1 shows an external reinforcement means 12 consisting of a cross-sectional profile in the shape of an ⁇ applied against the external surface of each half-shell enclosing the collars 11, by gluing, riveting or welding. The length of this profile is substantially equal to that of the half-shell, pressing against the two rings 5 and 6.
  • the rear 5 and front 6 rings each have a circular groove on their lateral face facing the envelope and in which is housed at least the corresponding end portion of the envelope 7.
  • the groove 24 of the rear ring 5 is visible in FIGS. 3 and 4, and the groove 28 of the front ring 6 is visible in FIG. 4.
  • the position of the two half-shells 8 and 9 can be arbitrary relative to the tube 1.
  • the two half-shells 8 and 9 can be placed towards the upper and lower parts of the tube 1.
  • the lower half-shell 8 can be provided with openings 13 promoting air circulation.
  • This variant can be implemented in particular when the tube 1 is of great length and of large caliber undergoing very strong recoil accelerations (6000 g).
  • the spacer 7 then consists of two elements 7a and 7b in the extension of one another.
  • the element 7a itself consists of two half-shells 8a and 9a joined by collars 11, while the element 7b itself consists of two half-shells 8b and 9b joined by collars 11.
  • the rear ring 5 of the element 7b is guided on the front ring 6 of the element 7a, this ensuring coaxial guidance of the elements 7a and 7b.
  • the intermediate rings 14 and 15 have bearing faces on which the two elements 7a and 7b come to bear.
  • each element 7a and 7b comprises connection elements 10a and 10b for connecting the two half-shells 8a, 9a and 8b, 9b constituting each element, and reinforcement means 12a and 12b of ⁇ -shaped cross section.
  • the upper half-shells 9a and 9b have holes 16 allowing the air to escape through the upper part of the sleeve without for this allowing the runoff water to enter it. These openings have a diameter smaller than that of the openings 13 in Figure 1, which allow them to quickly evacuate any liquid on board when crossing a river.
  • FIG 3 shows in more detail the half-shell 9a of the element 7a of the envelope of Figure 2, the constituent parts are shown in an exploded view.
  • the half-shell 9a is reinforced by a profile 12a of cross section in the shape of an ⁇ in projecting view and by a profile 12a of straight section in the form of ⁇ on the external side on the one hand, and by two profiles 18 and 19 in the form of T on the internal side on the other hand.
  • the complementary half-shells 8a and 9a of the element 7a are joined by means of the two connection means 10a on which notches 20 can be made to cooperate with lugs 21 projecting at the edge of said half-shells. shells.
  • the intermediate ring 14 is isolated from the tube 1 by a washer 22, for example made of rubber. This is for example glued to the intermediate ring 14 and makes it possible to prohibit the transmission of the inevitable deformations of the tube 1 to the anti-arcuate sleeve 4 and vice versa. It is the same for the intermediate ring 15 when it is used.
  • FIG 4 there is shown an element 7a of the envelope and more particularly the half-shell 8a whose component parts are assembled.
  • the half-shell 8a is provided with holes 13 of large diameter for the evacuation of fluids during operation, of the reinforcing profile 12a projecting on the external side and of the T-shaped profile 19 on the internal side, the other two profiles 12a and 18 not being shown.
  • the half-shell 8a or 8b is constituted by a single piece applied to the intermediate rings 14 and 15.
  • the rear ring 5 is provided with a groove 24 in which the half-shell engages 8a, the end of the profile 19 coming to bear against the edge of this groove.
  • Each intermediate ring 14 or 15 receives a rubber washer 22.
  • This washer can be arranged in a groove made in the thickness of the ring.
  • Each intermediate ring has a notch 25 receiving the projecting edge 26 of the profile 19.
  • the intermediate rings 14 and 15 are provided with longitudinal holes 27 to communicate the sub-assemblies delimited by the envelope.
  • the front ring 6 has a groove 28 receiving the half-shell 8b and the end of the profile 19.
  • the male part 29 and the female part 30 of the collars 11 have also been shown joining the half-shells together, for example using a screw.
  • the weakly stressed parts 14, 15, 5 and 10a can be made of aluminum alloy and plastic.
  • the solution according to the invention makes it possible to increase the length usually accepted on the tubes for the anti-arcuate sleeves by approximately 1.50 m while reducing the mass by more than 20%.
  • the solution used in the invention makes it possible to maintain an air layer around the tube which is neither subjected to solar radiation, nor to wind, nor to precipitation.
  • the homogeneity of this layer of air over the entire length of the tube is ensured by the holes 13 and 16 of the half-shells and the holes 25 of the intermediate rings 14 and 15.
  • the holes 16 will be, given their position on the upper generatrix of the half-shell, small enough not to let rainwater in while being large enough to allow an exchange of air to the outside, for example with a diameter of around 2 mm.
  • the openings 13 will, given their position on the lower generatrix of the half-shell, be large enough to allow, when crossing a ford, a rapid evacuation of the water which has seeped into the anti-sheath arching during the maneuver.
  • FIG. 5 shows in section the intermediate ring 14 positioned on the tube (not shown) by means of the washer 22, provided with the communication holes 25.
  • the half-shell 8a is applied to the outer surface of this ring as explained above.
  • the half-shell is engaged in the H-shaped profile 10 and is provided on its external surface with omega-shaped profiles 12 and the male 29 and female 30 parts forming a collar 11 for connection.
  • the complementary half-shell also includes these same elements.
  • Each collar 11 has a tab 40 welded to the external surface of the half-shell. This tab 40 receives the male or female part as the case may be.
  • the corresponding half-shells are placed opposite, making the male and female parts correspond, the connection of which is ensured, for example by screwing.
  • FIG 6 there is shown a cross section of a half-shell 8a for example on which has been reported externally the two reinforcements 12a in omega on the outer side and the T-shaped reinforcements 19 on the inner side.
  • connection means 10 H-shaped from the half-shell 8a to the corresponding half-shell not shown.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Connection Of Plates (AREA)

Abstract

Manchon anti-arcure pour tube (1) d'artillerie de gros calibre, constitué d'une enveloppe (7), entourant à distance le tube et dont la longueur est sensiblement égale à celle de la partie émergente du tube, caractérisé en ce qu'il comprend une bague avant (6) fixée au voisinage de l'extrémité libre du tube (1) et une bague arrière (5) fixée au niveau de la boîte à fumée (2) du tube, et en ce que l'enveloppe se présente sous la forme de deux demi-coquilles (8, 9) assemblées par un moyen de connexion (10).Anti-arcure sleeve for large caliber artillery tube (1), consisting of a casing (7), surrounding the tube at a distance and the length of which is substantially equal to that of the emerging part of the tube, characterized in that 'it comprises a front ring (6) fixed in the vicinity of the free end of the tube (1) and a rear ring (5) fixed at the level of the smoke box (2) of the tube, and in that the casing is in the form of two half-shells (8, 9) assembled by a connection means (10).

Description

Le domaine technique de la présente invention est celui des manchons anti-arcure pour tube d'artillerie de gros calibre.The technical field of the present invention is that of anti-arcuate sleeves for large caliber artillery tube.

La conception moderne des tubes d'artillerie implique l'utilisation d'un manchon anti-arcure, c'est-à-dire d'une pièce supplémentaire coopérant avec le tube pour éviter sa courbure. En effet, le tube qui sert à lancer les projectiles est une pièce relativement longue fixée au niveau de l'affût à une extrémité. Elle doit donc résister notamment à l'action de son propre poids, aux contraintes résultant du coup de canon et des conditions atmosphériques.The modern design of artillery tubes implies the use of an anti-arcuate sleeve, that is to say an additional part cooperating with the tube to avoid its curvature. Indeed, the tube which is used to launch the projectiles is a relatively long piece fixed at the level of the mount at one end. It must therefore resist in particular the action of its own weight, the stresses resulting from the cannon shot and atmospheric conditions.

Trois techniques sont utilisées pour réaliser actuellement les manchons anti-arcure : par moulage, par mécano-soudage et par enroulé filamentaire, suivies à chaque fois d'usinages particuliers pour assurer après assemblage l'alignement des portées. C'est donc un inconvénient important au regard des dimensions des pièces à manipuler. D'autre part, compte tenu des accélérations de recul mises en jeu au coup de canon, le dimensionnement des manchons anti-arcure oblige à limiter la longueur de ceux-ci pour des questions de tenue mécanique, ou bien à augmenter les épaisseurs des parois, donc de la masse suspendue.Three techniques are currently used to produce anti-arcuate sleeves: by molding, by mechanical welding and by filament wound, followed each time by specific machining to ensure alignment of the spans after assembly. It is therefore an important drawback with regard to the dimensions of the parts to be handled. On the other hand, taking into account the recoil accelerations brought into play by the cannon shot, the dimensioning of the anti-arcuate sleeves means that they have to be limited in length for reasons of mechanical strength, or else the thicknesses of the walls have to be increased. , therefore of the suspended mass.

Le manchon anti-arcure a principalement pour fonction de limiter l'arcure, c'est-à-dire la déformation du tube, due aux conditions extérieures : pluie, échauffement par exemple, qui engendrent une modification de la température du tube dans une direction autre que celle de son axe. Ainsi, un gradient de température entre la partie supérieure et la partie inférieure du tube engendre une déformation de celui-ci et affecte la précision du tir.The main function of the anti-bending sleeve is to limit the bending, that is to say the deformation of the tube, due to external conditions: rain, heating for example, which cause a modification of the temperature of the tube in one direction. other than that of its axis. Thus, a temperature gradient between the upper part and the lower part of the tube generates a deformation of the latter and affects the accuracy of the shot.

Le Brevet FR-A-1 445 546 décrit un dispositif pour empêcher l'arcure d'un canon selon lequel on dispose une enveloppe autour du tube à une certaine distance de celui-ci. On crée ainsi un matelas fluide au sein duquel les différences de température provoquent des phénomènes de convection qui rétablissent l'homogénéité thermique. Toutefois, aucune structure précise n'est décrite pour fixer cette enveloppe sur le tube.Patent FR-A-1 445 546 describes a device for preventing the arching of a barrel according to which an envelope is placed around the tube at a certain distance from this one. This creates a fluid mattress within which the temperature differences cause convection phenomena which restore thermal uniformity. However, no precise structure is described for fixing this envelope on the tube.

Le but de la présente invention est de proposer un manchon anti-arcure permettant de pallier les inconvénients de l'art antérieur en diminuant sa masse et en minimisant le gradient de température entourant le tube.The object of the present invention is to provide an anti-arcuate sleeve making it possible to overcome the drawbacks of the prior art by reducing its mass and minimizing the temperature gradient surrounding the tube.

L'invention propose à cet effet un manchon anti-arcure pour un tube d'artillerie de gros calibre, constitué d'une enveloppe, entourant à distance le tube et dont la longueur est sensiblement égale à celle de la partie émergente du tube, caractérisé en ce qu'il comprend une bague avant fixée au voisinage de l'extrémité libre du tube et une bague arrière fixée au niveau de la boîte à fumée du tube, et en ce que l'enveloppe se présente sous la forme de deux demi-coquilles assemblées par un moyen de connexion.To this end, the invention proposes an anti-arcuate sleeve for a large caliber artillery tube, consisting of an envelope, surrounding the tube at a distance and whose length is substantially equal to that of the emerging part of the tube, characterized in that it comprises a front ring fixed near the free end of the tube and a rear ring fixed at the level of the smoke box of the tube, and in that the casing is in the form of two half shells assembled by means of connection.

Selon une caractéristique de l'invention, chaque bague est munie d'une rainure de réception de l'enveloppe.According to a characteristic of the invention, each ring is provided with a groove for receiving the envelope.

Selon d'autres caractéristiques de l'invention :

  • les deux demi-coquilles sont munies au niveau de leurs bords adjacents d'un moyen de connexion constitué par un profilé en forme de H, par exemple,
  • chaque demi-coquille est munie de moyens de renfort externe et/ou interne, le moyen de renfort interne étant constitué par un profilé en forme de T et le moyen de renfort externe par un profilé à section droite en forme de Ω, par exemple, et
  • chaque demi-coquille est munie de percements pour assurer la circulation de l'air entre l'espace interne délimité par les demi-coquilles et le tube, et l'extérieur.
According to other characteristics of the invention:
  • the two half-shells are provided at their adjacent edges with a connection means constituted by an H-shaped profile, for example,
  • each half-shell is provided with external and / or internal reinforcement means, the internal reinforcement means consisting of a T-shaped profile and the external reinforcement means by a straight section profile in the shape of an Ω, for example, and
  • each half-shell is provided with openings to ensure air circulation between the space internal delimited by the half-shells and the tube, and the outside.

Selon encore une autre caractéristique de l'invention, le manchon anti-arcure comporte au moins une bague intermédiaire disposée sensiblement au niveau de la partie médiane de l'enveloppe, cette bague étant munie de part et d'autre d'une rainure recevant l'extrémité des deux éléments d'enveloppe, cette bague étant appliquée directement sur le tube par serrage.According to yet another characteristic of the invention, the anti-arcuate sleeve comprises at least one intermediate ring disposed substantially at the middle part of the envelope, this ring being provided on either side with a groove receiving the end of the two envelope elements, this ring being applied directly to the tube by clamping.

Selon une autre caractéristique de l'invention, une rondelle isolante, par exemple en caoutchouc, est disposée entre la bague intermédiaire et le tube.According to another characteristic of the invention, an insulating washer, for example made of rubber, is arranged between the intermediate ring and the tube.

Selon un exemple préférentiel de réalisation, il est prévu deux bagues intermédiaires, chaque bague intermédiaire étant munie de trous longitudinaux faisant communiquer les sous-ensembles délimités par l'enveloppe, les bagues avant et arrière et la ou les bagues intermédiaires.According to a preferred embodiment, two intermediate rings are provided, each intermediate ring being provided with longitudinal holes making the sub-assemblies defined by the casing communicate, the front and rear rings and the intermediate ring or rings.

D'une manière générale, chaque demi-coquille présente en section un profil en demi-cercle, l'enveloppe présente un profil conique dont la grande base est constituée par la bague arrière, et les demi-coquilles, les profilés en H, L et Ω sont réalisés à l'aide de tôles selon une technique de pliage.In general, each half-shell has a semi-circular profile in section, the envelope has a conical profile, the large base of which is formed by the rear ring, and the half-shells, the H, L profiles. and Ω are produced using sheets using a folding technique.

Un avantage de la présente invention réside dans la mise en oeuvre de techniques simples de fabrication excluant toute opération de moulage, d'usinage ou de mécano-soudage, conduisant à une diminution des coûts de fabrication.An advantage of the present invention lies in the implementation of simple manufacturing techniques excluding any molding, machining or mechanical welding operation, leading to a reduction in manufacturing costs.

Un autre avantage de l'invention réside dans le fait que le manchon résiste à des accélérations de recul supérieures à 5000 m/s².Another advantage of the invention lies in the fact that the sleeve resists recoil accelerations greater than 5000 m / s².

Un autre avantage encore de l'invention réside dans la possiblité de remplacement partiel ou total du manchon sans affecter les caractéristiques du tube lui-même.Yet another advantage of the invention lies in the possibility of partial or total replacement of the sleeve without affecting the characteristics of the tube itself.

Un autre avantage encore de l'invention réside dans le fait que des éléments du manchon présentent une structure identique.Yet another advantage of the invention lies in the fact that elements of the sleeve have an identical structure.

D'autres caractéristiques et avantages de l'invention seront mieux compris à la lecture du complément de description qui va suivre donné en relation avec des dessins sur lesquels :

  • la figure 1 est une vue d'un premier mode de réalisation du manchon selon l'invention,
  • la figure 2 est une vue d'un second mode de réalisation du manchon selon l'invention,
  • la figure 3 est une vue éclatée en perspective d'une partie de la moitié supérieure du manchon du second mode de réalisation de la figure 2,
  • la figure 4 est une vue en perspective de la moitié inférieure du manchon,
  • la figure 5 est une vue en coupe d'un collier, et
  • la figure 6 est une vue en coupe transversale de l'enveloppe.
Other characteristics and advantages of the invention will be better understood on reading the additional description which follows given in relation to the drawings in which:
  • FIG. 1 is a view of a first embodiment of the sleeve according to the invention,
  • FIG. 2 is a view of a second embodiment of the sleeve according to the invention,
  • FIG. 3 is an exploded perspective view of part of the upper half of the sleeve of the second embodiment of FIG. 2,
  • FIG. 4 is a perspective view of the lower half of the sleeve,
  • FIG. 5 is a sectional view of a necklace, and
  • Figure 6 is a cross-sectional view of the envelope.

La figure 1 montre un tube d'artillerie 1 muni d'une boîte à fumée 2, terminé par un frein de bouche 3 vers l'avant. Le tube 1 prolonge classiquement la chambre du canon et n'a pas à être décrit plus complètement. Il présente toutefois une forme générale tronconique entre la boîte à fumée 2 et le frein de bouche 3, la grande base étant située vers la boîte à fumée. Au niveau de la partie intermédiaire entre la boîte à fumée 2 et le frein de bouche 3 ou bien l'extrémité avant libre si le tube 1 ne comporte pas un frein de bouche, il est bien connu de disposer un manchon anti-arcure 4 dont l'objectif premier est de limiter les déformations du tube préjudiciables aux performances de l'arme. Plus la longueur de cette partie intermédiaire est importante plus le manchon anti-arcure doit être performant, ce qui se traduit par une augmentation de la masse de la partie saillante du tube. Les accélérations de recul mises en jeu aggravent encore les inconvénients liés à la masse et détériorent la tenue mécanique de l'ensemble tube-manchon anti-arcure.Figure 1 shows an artillery tube 1 provided with a smoke box 2, terminated by a muzzle brake 3 towards the front. The tube 1 conventionally extends the barrel chamber and need not be described more fully. However, it has a generally frustoconical shape between the smoke box 2 and the muzzle brake 3, the large base being located towards the smoke box. At the intermediate part between the smoke box 2 and the muzzle brake 3 or else the free front end if the tube 1 does not have a muzzle brake, it is well known to have an anti-arcuate sleeve 4 of which the primary objective is to limit the deformations of the tube detrimental to the performance of the weapon. The greater the length of this intermediate part, the more the anti-arcuate sleeve must be efficient, which results in an increase in the mass of the projecting part of the tube. The reversing accelerations brought into play further aggravate the drawbacks linked to the mass and deteriorate the mechanical strength of the anti-arcuate tube-sleeve assembly.

Selon l'invention, le manchon anti-arcure 4 comprend une bague arrière 5 et une bague avant 6 entre lesquelles est disposée une entretoise 7. La bague arrière 5 est guidée sur une portée réalisée sur la boîte à fumée 2. La bague avant 6 est maintenue dans une gorge pratiquée sur le tube. On peut fixer la bague avant 6 à une distance quelconque de la bague arrière 5 en fonction des caractéristiques recherchées par l'homme du métier. On préfère, suivant l'invention, fixer la bague avant 6 le plus près possible du frein de bouche 3. L'enveloppe 7 est placée à distance du tube 1 et peut entourer totalement ou partiellement ledit tube. Suivant la figure 1, l'enveloppe 7 entoure complètement le tube 1 et présente une forme générale tronconique analogue à celle du tube, cette forme de réalisation étant choisie pour des raisons de commodité. L'enveloppe 7 est constituée de deux demi-coquilles 8 et 9 réunies par un moyen de connexion 10 en forme de H au niveau de leurs bords adjacents, et maintenues par des colliers 11. Chaque demi-coquille 8 et 9 peut être renforcée par des moyens de renfort externe et/ou interne. La figure 1 montre un moyen de renfort externe 12 constitué d'un profilé à section droite en forme de Ω appliqué contre la surface externe de chaque demi-coquille emprisonnant les colliers 11, par collage, rivetage ou soudage. La longueur de ce profilé est sensiblement égale à celle de la demi-coquille, en appui contre les deux bagues 5 et 6. Ces renforts permettent d'augmenter la résistance de l'enveloppe 7 à l'accélération de recul et absorbent les efforts créés par l'inertie du manchon anti-arcure.According to the invention, the anti-arcuate sleeve 4 comprises a rear ring 5 and a front ring 6 between which is a spacer 7. The rear ring 5 is guided over a bearing surface produced on the smoke box 2. The front ring 6 is held in a groove made on the tube. The front ring 6 can be fixed at any distance from the rear ring 5 depending on the characteristics sought by those skilled in the art. It is preferred, according to the invention, to fix the front ring 6 as close as possible to the muzzle brake 3. The casing 7 is placed at a distance from the tube 1 and can completely or partially surround said tube. According to Figure 1, the casing 7 completely surrounds the tube 1 and has a generally frustoconical shape similar to that of the tube, this embodiment being chosen for reasons of convenience. The envelope 7 is made up of two half-shells 8 and 9 joined by an H-shaped connection means 10 at their adjacent edges, and held by collars 11. Each half-shell 8 and 9 can be reinforced by external and / or internal reinforcement means. FIG. 1 shows an external reinforcement means 12 consisting of a cross-sectional profile in the shape of an Ω applied against the external surface of each half-shell enclosing the collars 11, by gluing, riveting or welding. The length of this profile is substantially equal to that of the half-shell, pressing against the two rings 5 and 6. These reinforcements make it possible to increase the resistance of the envelope 7 to the acceleration of recoil and absorb the forces created. by the inertia of the anti-arcuate sleeve.

Les bagues arrière 5 et avant 6 comportent chacune une rainure circulaire sur leur face latérale en regard de l'enveloppe et dans laquelle vient se loger au moins la partie d'extrémité correspondante de l'enveloppe 7. La rainure 24 de la bague arrière 5 est visible sur les figures 3 et 4, et la rainure 28 de la bague avant 6 est visible sur la figure 4.The rear 5 and front 6 rings each have a circular groove on their lateral face facing the envelope and in which is housed at least the corresponding end portion of the envelope 7. The groove 24 of the rear ring 5 is visible in FIGS. 3 and 4, and the groove 28 of the front ring 6 is visible in FIG. 4.

La position des deux demi-coquilles 8 et 9 peut être quelconque par rapport au tube 1. En particulier, on peut disposer les deux demi-coquilles 8 et 9 vers les parties supérieure et inférieure du tube 1. La demi-coquille inférieure 8 peut être munie de percements 13 favorisant la circulation de l'air.The position of the two half-shells 8 and 9 can be arbitrary relative to the tube 1. In particular, the two half-shells 8 and 9 can be placed towards the upper and lower parts of the tube 1. The lower half-shell 8 can be provided with openings 13 promoting air circulation.

Un autre mode de réalisation est représenté sur la figure 2 où on voit que chaque demi-coquille est elle-même réalisée en deux parties.Another embodiment is shown in Figure 2 where we see that each half-shell is itself made in two parts.

Cette variante peut être mise en oeuvre en particulier lorsque le tube 1 est d'une grande longueur et de gros calibre subissant de très forte accélérations de recul (6000 g)..This variant can be implemented in particular when the tube 1 is of great length and of large caliber undergoing very strong recoil accelerations (6000 g).

L'entretoise 7 est alors constituée de deux éléments 7a et 7b dans le prolongement l'un de l'autre. L'élément 7a est lui-même constitué de deux demi-coquilles 8a et 9a réunies par des colliers 11, alors que l'élément 7b est lui-même constitué de deux demi-coquilles 8b et 9b réunies par des colliers 11. Pour fixer les deux éléments 7a et 7b entre eux, la bague arrière 5 de l'élément 7b vient se guider sur la bague avant 6 de l'élément 7a, ceci assurant un guidage coaxial des éléments 7a et 7b. Les bagues intermédiaires 14 et 15 comportent des faces d'appui sur lesquelles viennent s'appuyer les deux éléments 7a et 7b. Comme dans le mode de réalisation précédent, chaque élément 7a et 7b comprend des éléments de connexion 10a et 10b pour relier les deux demi-coquilles 8a, 9a et 8b, 9b constituant chaque élément, et des moyens de renfort 12a et 12b de section droite en forme de Ω. Enfin, les demi-coquilles supérieures 9a et 9b comportent des percements 16 permettant à l'air de s'échapper par la partie supérieure du manchon sans pour cela permettre à l'eau de ruissellement d'y pénétrer. Ces percements ont un diamètre inférieur à celui des percements 13 de la figure 1, qui eux permettent une évacuation rapide de tout liquide embarqué lors du franchissement d'une rivière.The spacer 7 then consists of two elements 7a and 7b in the extension of one another. The element 7a itself consists of two half-shells 8a and 9a joined by collars 11, while the element 7b itself consists of two half-shells 8b and 9b joined by collars 11. To fix the two elements 7a and 7b between them, the rear ring 5 of the element 7b is guided on the front ring 6 of the element 7a, this ensuring coaxial guidance of the elements 7a and 7b. The intermediate rings 14 and 15 have bearing faces on which the two elements 7a and 7b come to bear. As in the previous embodiment, each element 7a and 7b comprises connection elements 10a and 10b for connecting the two half-shells 8a, 9a and 8b, 9b constituting each element, and reinforcement means 12a and 12b of Ω-shaped cross section. Finally, the upper half-shells 9a and 9b have holes 16 allowing the air to escape through the upper part of the sleeve without for this allowing the runoff water to enter it. These openings have a diameter smaller than that of the openings 13 in Figure 1, which allow them to quickly evacuate any liquid on board when crossing a river.

La figure 3 montre plus en détail la demi-coquille 9a de l'élément 7a de l'enveloppe de la figure 2, dont les parties constitutives sont représentées suivant une vue éclatée. Concrètement, on retrouve la bague arrière 5, la demi-coquille 9a et la bague intermédiaire 14. Dans cette forme de réalisation, la demi-coquille 9a est renforcée par un profilé 12a de section droite en forme de Ω en vue saillante et par un profilé 12a de section droite en forme de Ω côté externe d'une part, et par deux profilés 18 et 19 en forme de T côté interne d'autre part. Les demi-coquilles complémentaires 8a et 9a de l'élément 7a sont réunies à l'aide des deux moyens de connexion 10a sur lesquels des encoches 20 peuvent être ménagées pour coopérer avec des ergots 21 en saillie au niveau de l'arête desdites demi-coquilles. Ainsi, tout déplacement relatif des demi-coquilles est interdit. Sur la figure 3, on voit encore que la bague intermédiaire 14 est isolée du tube 1 par une rondelle 22 par exemple en caoutchouc. Celle-ci est par exemple collée sur la bague intermédiaire 14 et permet d'interdire la transmission des déformations inévitables du tube 1 au manchon anti-arcure 4 et réciproquement. Il en est de même de la bague intermédiaire 15 lorsque celle-ci est utilisée.Figure 3 shows in more detail the half-shell 9a of the element 7a of the envelope of Figure 2, the constituent parts are shown in an exploded view. Concretely, there is the rear ring 5, the half-shell 9a and the intermediate ring 14. In this embodiment, the half-shell 9a is reinforced by a profile 12a of cross section in the shape of an Ω in projecting view and by a profile 12a of straight section in the form of Ω on the external side on the one hand, and by two profiles 18 and 19 in the form of T on the internal side on the other hand. The complementary half-shells 8a and 9a of the element 7a are joined by means of the two connection means 10a on which notches 20 can be made to cooperate with lugs 21 projecting at the edge of said half-shells. shells. Thus, any relative movement of the half-shells is prohibited. In FIG. 3, it can also be seen that the intermediate ring 14 is isolated from the tube 1 by a washer 22, for example made of rubber. This is for example glued to the intermediate ring 14 and makes it possible to prohibit the transmission of the inevitable deformations of the tube 1 to the anti-arcuate sleeve 4 and vice versa. It is the same for the intermediate ring 15 when it is used.

Sur la figure 4, on a représenté un élément 7a de l'enveloppe et plus particulièrement la demi-coquille 8a dont les parties constitutives sont assemblées. On voit que la demi-coquille 8a est munie de percements 13 de grand diamètre pour l'évacuation des fluides lors du fonctionnement, du profilé de renfort 12a en saillie côté externe et du profilé 19 en forme de T côté interne, les deux autres profilés 12a et 18 n'étant pas représentés. La demi-coquille 8a ou 8b est constituée par une pièce unique appliquée sur les bagues intermédiaires 14 et 15. Sur cette figure 4, on voit que la bague arrière 5 est munie d'une rainure 24 dans laquelle s'engage la demi-coquille 8a, l'extrémité du profilé 19 venant en appui contre le bord de cette rainure. Chaque bague intermédiaire 14 ou 15 reçoit une rondelle 22 en caoutchouc. Cette rondelle peut être disposée dans une rainure pratiquée dans l'épaisseur de la bague. Chaque bague intermédiaire comporte une encoche 25 recevant le bord saillant 26 du profilé 19. Les bagues intermédiaires 14 et 15 sont munies de trous longitudinaux 27 pour faire communiquer les sous-ensembles délimités par l'enveloppe. On voit encore que la bague avant 6 comporte une rainure 28 recevant la demi-coquille 8b et l'extrémité du profilé 19. On a encore représenté la partie mâle 29 et la partie femelle 30 des colliers 11 réunissant les demi-coquilles entre elles, par exemple à l'aide d'une vis.In Figure 4, there is shown an element 7a of the envelope and more particularly the half-shell 8a whose component parts are assembled. We see that the half-shell 8a is provided with holes 13 of large diameter for the evacuation of fluids during operation, of the reinforcing profile 12a projecting on the external side and of the T-shaped profile 19 on the internal side, the other two profiles 12a and 18 not being shown. The half-shell 8a or 8b is constituted by a single piece applied to the intermediate rings 14 and 15. In this figure 4, it can be seen that the rear ring 5 is provided with a groove 24 in which the half-shell engages 8a, the end of the profile 19 coming to bear against the edge of this groove. Each intermediate ring 14 or 15 receives a rubber washer 22. This washer can be arranged in a groove made in the thickness of the ring. Each intermediate ring has a notch 25 receiving the projecting edge 26 of the profile 19. The intermediate rings 14 and 15 are provided with longitudinal holes 27 to communicate the sub-assemblies delimited by the envelope. It can also be seen that the front ring 6 has a groove 28 receiving the half-shell 8b and the end of the profile 19. The male part 29 and the female part 30 of the collars 11 have also been shown joining the half-shells together, for example using a screw.

Pour réduire encore la masse du manchon anti-arcure, les pièces faiblement sollicitées 14, 15, 5 et 10a peuvent être réalisées en alliage d'aluminium et en matière plastique. La solution selon l'invention permet d'augmenter la longueur habituellement admise sur les tubes pour les manchons anti-arcure d'environ 1,50 m tout en réduisant la masse de plus de 20 %.To further reduce the mass of the anti-arcuate sleeve, the weakly stressed parts 14, 15, 5 and 10a can be made of aluminum alloy and plastic. The solution according to the invention makes it possible to increase the length usually accepted on the tubes for the anti-arcuate sleeves by approximately 1.50 m while reducing the mass by more than 20%.

D'autre part, on comprend que la solution utilisée dans l'invention permet de maintenir une couche d'air autour du tube qui n'est soumise ni au rayonnement solaire, ni au vent, ni aux précipitations. L'homogénéité de cette couche d'air sur toute la longueur du tube est assurée par les percements 13 et 16 des demi-coquilles et des percements 25 des bagues intermédiaires 14 et 15. Les percements 16 seront, compte tenu de leur position sur la génératrice supérieure de la demi-coquille, suffisamment petits pour ne pas laisser pénétrer l'eau de pluie tout en étant suffisamment gros pour permettre un échange d'air vers l'extérieur, par exemple avec un diamètre de l'ordre de 2 mm. Les percements 13 seront, compte tenu de leur position sur la génératrice inférieure de la demi-coquille, suffisamment gros pour permettre, lors du franchissement d'un gué, une évacuation rapide de l'eau qui s'est infiltrée dans le manchon anti-arcure au cours de la manoeuvre. On peut par exemple adopter une surface cumulée des percements inférieurs 13 égale ou légèrement supérieure à celle des percements supérieurs 16 pour assurer, à l'intérieur du manchon anti-arcure, un courant d'air qui aura pour effet de minimiser le gradient de température entre la génératrice supérieure et la génératrice inférieure du tube.On the other hand, it is understood that the solution used in the invention makes it possible to maintain an air layer around the tube which is neither subjected to solar radiation, nor to wind, nor to precipitation. The homogeneity of this layer of air over the entire length of the tube is ensured by the holes 13 and 16 of the half-shells and the holes 25 of the intermediate rings 14 and 15. The holes 16 will be, given their position on the upper generatrix of the half-shell, small enough not to let rainwater in while being large enough to allow an exchange of air to the outside, for example with a diameter of around 2 mm. The openings 13 will, given their position on the lower generatrix of the half-shell, be large enough to allow, when crossing a ford, a rapid evacuation of the water which has seeped into the anti-sheath arching during the maneuver. One can for example adopt a cumulative surface of the lower openings 13 equal or slightly greater than that of the upper openings 16 to ensure, inside the anti-arcuate sleeve, a current of air which will have the effect of minimizing the temperature gradient between the upper generator and the lower generator of the tube.

La figure 5 représente en coupe la bague intermédiaire 14 positionnée sur le tube (non représenté) par l'intermédiaire de la rondelle 22, munie des trous 25 de communication. La demi-coquille 8a est appliquée sur la surface extérieure de cette bague comme expliqué précédemment. La demi-coquille est engagée dans le profilé en H 10 et est munie sur sa surface externe des profilés en oméga 12 et des parties mâles 29 et femelle 30 formant un collier 11 de liaison. La demi-coquille complémentaire comporte elle aussi ces mêmes éléments. Chaque collier 11 comporte une patte 40 soudée sur la surface externe de la demi-coquille. Cette patte 40 reçoit la partie mâle ou femelle selon le cas. Au montage, on place les demi-coquilles correspondantes en vis-à-vis en faisant correspondre les parties mâle et femelle dont la liaison est assurée par exemple par vissage.FIG. 5 shows in section the intermediate ring 14 positioned on the tube (not shown) by means of the washer 22, provided with the communication holes 25. The half-shell 8a is applied to the outer surface of this ring as explained above. The half-shell is engaged in the H-shaped profile 10 and is provided on its external surface with omega-shaped profiles 12 and the male 29 and female 30 parts forming a collar 11 for connection. The complementary half-shell also includes these same elements. Each collar 11 has a tab 40 welded to the external surface of the half-shell. This tab 40 receives the male or female part as the case may be. During assembly, the corresponding half-shells are placed opposite, making the male and female parts correspond, the connection of which is ensured, for example by screwing.

Sur la figure 6, on a représenté une coupe transversale d'une demi-coquille 8a par exemple sur laquelle on a rapporté extérieurement les deux renforts 12a en oméga côté externe et les renforts 19 en forme de T côté interne. On voit également le moyen de connexion 10 en forme de H de la demi-coquille 8a à la demi-coquille correspondante non représentée.In Figure 6, there is shown a cross section of a half-shell 8a for example on which has been reported externally the two reinforcements 12a in omega on the outer side and the T-shaped reinforcements 19 on the inner side. We also see the connection means 10 H-shaped from the half-shell 8a to the corresponding half-shell not shown.

Claims (15)

Manchon anti-arcure pour tube (1) d'artillerie de gros calibre, constitué d'une enveloppe (7), entourant à distance le tube et dont la longueur est sensiblement égale à celle de la partie émergente du tube, caractérisé en ce qu'il comprend une bague avant (6) fixée au voisinage de l'extrémité libre du tube (1) et une bague arrière (5) fixée au niveau de la boîte à fumée (2) du tube, et en ce que l'enveloppe se présente sous la forme de deux demi-coquilles (8, 9) assemblées par un moyen de connexion (10).Anti-arching sleeve for large caliber artillery tube (1), consisting of an envelope (7), surrounding the tube at a distance and whose length is substantially equal to that of the emerging part of the tube, characterized in that '' It comprises a front ring (6) fixed in the vicinity of the free end of the tube (1) and a rear ring (5) fixed at the level of the smoke box (2) of the tube, and in that the casing is in the form of two half-shells (8, 9) assembled by a connection means (10). Manchon anti-arcure selon la revendication 1, caractérisé en ce que chaque bague (5, 6) est munie d'une rainure de réception (24, 28) de l'enveloppe (7).Anti-arcuate sleeve according to claim 1, characterized in that each ring (5, 6) is provided with a groove for receiving (24, 28) the envelope (7). Manchon anti-arcure selon la revendication 1 ou 2, caractérisé en ce que les deux demi-coquilles (8, 9) sont munies au niveau de leurs bords adjacents d'un moyen de connexion (10).Anti-arcuate sleeve according to claim 1 or 2, characterized in that the two half-shells (8, 9) are provided at their adjacent edges with a connection means (10). Manchon anti-arcure selon la revendication 3, caractérisé en ce que le moyen de connexion (10) est constitué par un profilé en forme de H.Anti-arcuate sleeve according to claim 3, characterized in that the connection means (10) consists of an H-shaped profile. Manchon anti-arcure selon l'une quelconque des revendications 1 à 4, caractérisé en ce chaque demi-coquille (8, 9) est munie de moyens de renfort externe (12 ; 12a, 12b) et/ou interne (18, 19).Anti-arcuate sleeve according to any one of claims 1 to 4, characterized in that each half-shell (8, 9) is provided with external reinforcement means (12; 12a, 12b) and / or internal (18, 19) . Manchon anti-arcure selon la revendication 5, caractérisé en ce que le moyen de renfort interne (18, 19) est constitué par un profilé en forme de T et le moyen de renfort externe (12 ; 12a, 12b) par un profilé de section droite en forme de Ω.Anti-arcuate sleeve according to claim 5, characterized in that the internal reinforcement means (18, 19) consists of a T-shaped profile and the external reinforcement means (12; 12a, 12b) by a section profile straight Ω-shaped. Manchon anti-arcure selon l'une quelconque des revendications 1 à 6, caractérisé en ce que chaque demi-coquille (8, 9) est munie de percements (13, 16) pour assurer la circulation de l'air entre l'espace interne délimité par les demi-coquilles et le tube, et l'extérieur.Anti-arcuate sleeve according to any one of Claims 1 to 6, characterized in that each half-shell (8, 9) is provided with openings (13, 16) to ensure the circulation of air between the space internal delimited by the half-shells and the tube, and the outside. Manchon anti-arcure selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte au moins une bague intermédiaire (14, 15) disposée sensiblement au niveau de la partie médiane de l'enveloppe (7), munie de part et d'autre d'une rainure (24, 26) recevant l'extrémité des deux éléments (7a, 7b) de l'enveloppe.Anti-arcuate sleeve according to any one of the preceding claims, characterized in that it comprises at least one intermediate ring (14, 15) disposed substantially at the level of the middle part of the envelope (7), provided on the one hand and other of a groove (24, 26) receiving the end of the two elements (7a, 7b) of the envelope. Manchon anti-arcure selon la revendication 8, caractérisé en ce que la bague intermédiaire (14, 15) est appliquée directement sur le tube (1) par serrage.Anti-arcuate sleeve according to claim 8, characterized in that the intermediate ring (14, 15) is applied directly to the tube (1) by tightening. Manchon anti-arcure selon la revendication 9, caractérisé en ce qu'une rondelle isolante (22), par exemple en caoutchouc, est disposée entre la bague intermédiaire (14, 15) et le tube (1).Anti-arcuate sleeve according to claim 9, characterized in that an insulating washer (22), for example made of rubber, is arranged between the intermediate ring (14, 15) and the tube (1). Manchon anti-arcure selon l'une quelconque des revendications 8 à 10, caractérisé en ce qu'il comprend deux bagues intermédiaires (14, 15).Anti-arcuate sleeve according to any one of claims 8 to 10, characterized in that it comprises two intermediate rings (14, 15). Manchon anti-arcure selon l'une quelconque des revendications 8 à 11, caractérisé en ce que chaque bague intermédiaire (14, 15) est munie de trous (25) longitudinaux faisant communiquer les sous-ensembles délimités par l'enveloppe (7), les bagues avant (6) et arrière (5) et la ou les bagues intermédiaires (14, 15).Anti-arcuate sleeve according to any one of claims 8 to 11, characterized in that each intermediate ring (14, 15) is provided with longitudinal holes (25) communicating the sub-assemblies delimited by the envelope (7), the front (6) and rear (5) rings and the intermediate ring (s) (14, 15). Manchon anti-arcure selon l'une quelconque des revendications 1 à 12, caractérisé en ce que chaque demi-coquille (7) présente en section un profil en demi-cercle.Anti-arcuate sleeve according to any one of claims 1 to 12, characterized in that each half-shell (7) has in section a semi-circular profile. Manchon anti-arcure selon la revendication 13, caractérisé en ce que l'enveloppe présente un profil tronconique dont la grande base est constituée par la bague arrière (5).Anti-arcuate sleeve according to claim 13, characterized in that the envelope has a frustoconical profile, the large base of which is formed by the rear ring (5). Manchon anti-arcure selon l'une quelconque des revendications 1 à 14, caractérisé en ce que les demi-coquilles, les profilés en H (10), T (18, 19) et Ω (12 ; 12a, 12b) sont réalisés à l'aide de tôles selon une technique de pliage.Anti-arcuate sleeve according to any one of Claims 1 to 14, characterized in that the half-shells, the profiles in H (10), T (18, 19) and Ω (12; 12a, 12b) are produced using sheets using a folding technique.
EP95401236A 1994-06-16 1995-05-29 Sleeve for preventing bowing Expired - Lifetime EP0687884B1 (en)

Applications Claiming Priority (2)

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FR9407358A FR2721390B1 (en) 1994-06-16 1994-06-16 Anti-arcuate sleeve.
FR9407358 1994-06-16

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EP0687884A1 true EP0687884A1 (en) 1995-12-20
EP0687884B1 EP0687884B1 (en) 1999-02-10

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EP (1) EP0687884B1 (en)
DE (1) DE69507744T2 (en)
FR (1) FR2721390B1 (en)
IL (1) IL113678A (en)

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US10365061B1 (en) * 2016-12-29 2019-07-30 Aaron E. Painter Firearm barrel with non-metal outer sleeve
US20190078851A1 (en) * 2017-08-16 2019-03-14 Alan Aldophsen Weapon system modification directed to short stroke piston assembly
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FR1445546A (en) 1965-04-30 1966-07-15 Le Magnesium Ind Method for preventing arcing and device for implementing this method
BE708004A (en) * 1966-12-15 1968-04-16
BE896464A (en) * 1983-04-14 1983-08-01 Mathieu Jean Pierre Gun barrel anti bending cooler - has transfer parts fitted around outside and connect to external cooler
EP0183432A1 (en) * 1984-11-26 1986-06-04 Vickers Plc Thermal sleeve for gun barrels
EP0307308A1 (en) * 1987-09-09 1989-03-15 ETAT-FRANCAIS représenté par le DELEGUE GENERAL POUR L'ARMEMENT (DPAG) Anti-bending device for a gun barrel

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US3090150A (en) * 1960-06-13 1963-05-21 Fairchild Engine & Airplane Hand guard construction
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FR1445546A (en) 1965-04-30 1966-07-15 Le Magnesium Ind Method for preventing arcing and device for implementing this method
BE708004A (en) * 1966-12-15 1968-04-16
BE896464A (en) * 1983-04-14 1983-08-01 Mathieu Jean Pierre Gun barrel anti bending cooler - has transfer parts fitted around outside and connect to external cooler
EP0183432A1 (en) * 1984-11-26 1986-06-04 Vickers Plc Thermal sleeve for gun barrels
EP0307308A1 (en) * 1987-09-09 1989-03-15 ETAT-FRANCAIS représenté par le DELEGUE GENERAL POUR L'ARMEMENT (DPAG) Anti-bending device for a gun barrel

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EP2053338A3 (en) * 2007-10-26 2011-09-14 Krauss-Maffei Wegmann GmbH & Co. KG Small or medium bore machine cannon
EP2610574A1 (en) * 2007-10-26 2013-07-03 Krauss-Maffei Wegmann GmbH & Co. KG Small or medium caliber machine gun
EP2610574B1 (en) 2007-10-26 2016-11-30 Krauss-Maffei Wegmann GmbH & Co. KG Small or medium caliber machine gun
WO2012156214A1 (en) * 2011-05-13 2012-11-22 Rheinmetall Waffe Munition Gmbh Barrel cover

Also Published As

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US5650586A (en) 1997-07-22
IL113678A0 (en) 1995-08-31
EP0687884B1 (en) 1999-02-10
FR2721390B1 (en) 1996-08-14
IL113678A (en) 1998-02-22
DE69507744T2 (en) 1999-06-10
FR2721390A1 (en) 1995-12-22
DE69507744D1 (en) 1999-03-25

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