EP0263548A1 - Telescopic grenade - Google Patents

Telescopic grenade Download PDF

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Publication number
EP0263548A1
EP0263548A1 EP87201724A EP87201724A EP0263548A1 EP 0263548 A1 EP0263548 A1 EP 0263548A1 EP 87201724 A EP87201724 A EP 87201724A EP 87201724 A EP87201724 A EP 87201724A EP 0263548 A1 EP0263548 A1 EP 0263548A1
Authority
EP
European Patent Office
Prior art keywords
telescopic
grenade according
tail
housing
groove
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
EP87201724A
Other languages
German (de)
French (fr)
Other versions
EP0263548B1 (en
Inventor
André M. Gabriels
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.)
CESSIONE;FABRIQUE NATIONALE NOUVELLE HERSTAL
Original Assignee
FN Herstal SA
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 FN Herstal SA filed Critical FN Herstal SA
Publication of EP0263548A1 publication Critical patent/EP0263548A1/en
Application granted granted Critical
Publication of EP0263548B1 publication Critical patent/EP0263548B1/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
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/28—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
    • F42C15/30—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids of propellant gases, i.e. derived from propulsive charge or rocket motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H9/00—Equipment for attack or defence by spreading flame, gas or smoke or leurres; Chemical warfare equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/02—Stabilising arrangements
    • F42B10/12—Stabilising arrangements using fins longitudinally-slidable with respect to the projectile or missile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B30/00—Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
    • F42B30/04—Rifle grenades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
    • F42C15/188—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/28—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
    • F42C15/31—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids generated by the combustion of a pyrotechnic or explosive charge within the fuze

Definitions

  • This invention relates to a telescopic grenade, for example a grenade intended to be launched using a rifle and equipped with a bullet pass.
  • Telescopic projectiles are already known having a head extended by a tubular tail and containing an explosive charge as well as a firing chain of the latter, said tail being produced in two telescopic tubular parts, one of which is integral with said head. and carries with the latter a first part of said firing chain and the other of which carries the remaining part of the latter, guide means being distributed over said two parts in order to assign them a determined angular position, as a function of their relative axial position.
  • the projectile according to the invention consists essentially of a head extended by a tubular tail containing an explosive charge as well as a firing chain of the latter and in which said tail is made of two telescopic tubular parts, the l one is integral with said head and carries with the latter a first part of said firing chain and the other of which carries the remaining part of the latter, this projectile being provided with guide means distributed over said two parts in order to assign them an angular position according to their relative axial position.
  • This projectile is characterized in that it has means ensuring safety in the storage-transport position; means determining the exact relative position of the parts; means determining, under the effect of the propellant gases, a relative translation between the constituent parts of the tail; means preventing a untimely detonation and early trajectory safety means.
  • the projectile represented in the figures comprises a head 1 and a telescopic tubular tail 2 with tail section 3.
  • the tail 2 is produced in two parts 4-5, the part 4 of which is integral with the head 1 and the part 5 of which can slide around of the first.
  • the head 1 has inside a plate 6 provided with a percussion point 7 and a device 8 preventing an involuntary detonation.
  • the head 1 is fixed to the end of a sheath 9, the other end of which is provided with a sleeve 10.
  • a body 11 constituting the explosive charge of the projectile.
  • This body 11 has a single longitudinal groove 12 extending, at its end closest to the head 1, by a curved part 13.
  • a chamber 16 in which is housed a spring 17 acting against a shoulder 18 of the sleeve 10.
  • the latter has a circular groove 19 communicating, in the position of FIG. 2, with radial holes 20 provided for in said part 5 and communicating themselves mes with a circular chamber 21 in the housing 15.
  • radial holes 20 provided for in said part 5 and communicating themselves mes with a circular chamber 21 in the housing 15.
  • the sleeve 10 has two radial chambers 23-24 housing, each, a stressed ball 25 by a spring 26.
  • Said part 5 of the tail 2 has a groove 27 with which the balls 25 can cooperate.
  • the housing 15 is fixed to said part 5 by means of a deformable cup 29 allowing, after deformation, a translation of the housing 15 relative to the part 5.
  • an elastic locking ring 36 which can cooperate with a groove 37 in part 5.
  • the firing pyrotechnic chain comprises the percussion point 7, a detonator 30 and a relay 31 embedded in said explosive charge 11.
  • the percussion point 7 as well as the relay 31 are part of the head 1, while the detonator 30 is housed in a notch in the housing 15 which, in turn, is part of the telescopic tubular tail 2.
  • Said device 8 preventing an inadvertent detonation of the projectile in flight consists of a damper 32, the damping of which is determined by a spring 33.
  • the head 1 is extended by a protective tube 34 for the explosive charge 11.
  • the part 5 with the housing 15 occupies an angular position relative to the head 1 and the part 4 in such a way that the point 7 is misaligned with respect to the detonator 30, any relative movement of the part 5 relative to the head 1 being prevented by the contact of an extension 35 against the plate 6.
  • the extension 35 can be fixed either on said part 5 or on the plate 6.
  • the projectile is ready to be engaged on the sleeve at the end of the barrel of a rifle used for its launching.
  • the propellants enter, through the grooves 22, in the circular groove 19 and, thus, through the holes 20 in the groove 21.
  • the housing 15, by deforming the bowl 29, moves relative to the part 5.
  • the elastic ring 36 falls into the groove 37, thus ensuring the locking of the housing 15 relative to the part 5.
  • the balls 25 move in the two radial chambers 23-24 against the force of the springs 26, the latter undergoing a deformation such that they become inoperative.
  • the device 8 prevents any further progression of the part 5 until impact.
  • the spring 33 is calculated to avoid inadvertent detonation, for example by contact of the projectile with rain tropical, etc.
  • part 5 Upon impact, the high mass of part 5 is set in motion and communicates all of its energy to the detonator when it strikes the striker 7.
  • the safety of the start of the trajectory of the projectile according to the invention is controllable by the presence of the tube 34 with which the housing 15 cooperates. Indeed, during the path of the latter in the tube 34, it works there as a dash-pot, slowing down said path in a way by evacuating through a calibrated orifice the air present in the free volume 38, the latter being created when the projectile is in the position shown in FIG. 2.
  • the calibrated orifice can be produced by the radial clearance between the outside diameter of the housing 15 and the inside diameter of the tube 34.
  • said springs 26 will be calculated in such a way that they remain deformed after launching the projectile in order to avoid any friction of the balls 25 on the internal wall of part 5.
  • a make-up charge 40 can be accommodated in the free volume constituted by the ball-passing plug 41 and the sleeve 10.
  • FIG. 10 shows an embodiment in which is interposed, between the springs 26, a bar 39 made of a frangible material which can be destroyed by the passage of the ball in order to make the support for the springs 26 disappear.
  • FIG. 11 shows an embodiment in which the groove 12 is provided in the tube 34, while the groove 13 is provided in an extension 42 of the plate 6.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Toys (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Tents Or Canopies (AREA)

Abstract

The telescopic grenade is characterised in that it has means (29-35) ensuring safety in the storage and transport position and means (22-19-20-21-29) which, under the effect of the propellent gases, determine a relative translational movement between the component parts (5-15) of the shank (2). <IMAGE>

Description

Cette invention concerne une grenade télescopique, par exemple une grenade destinée à être lancée à l'aide d'un fusil et équipée d'un passe-balle. On connaît déja des projectiles télescopiques ayant une tête prolongée par une queue tubulaire et contenant une charge explosive ainsi qu'une chaîne de mise à feu de cette dernière, ladite queue étant réalisée en deux parties tubulaires télescopiques dont l'une est solidaire de ladite tête et porte avec cette dernière une première partie de ladite chaîne de mise à feu et dont l'autre porte la partie restante de cette dernière, des moyens de guidage étant répartis sur lesdites deux parties afin de leur assigner une position angulaire déterminée, en fonction de leur position axiale relative.This invention relates to a telescopic grenade, for example a grenade intended to be launched using a rifle and equipped with a bullet pass. Telescopic projectiles are already known having a head extended by a tubular tail and containing an explosive charge as well as a firing chain of the latter, said tail being produced in two telescopic tubular parts, one of which is integral with said head. and carries with the latter a first part of said firing chain and the other of which carries the remaining part of the latter, guide means being distributed over said two parts in order to assign them a determined angular position, as a function of their relative axial position.

Quoique ces projectiles connus sont très efficaces, la présente invention concerne un tel projectile présentant des avantages considérables, s'ajoutant aux avantages des projectiles déjà connus.Although these known projectiles are very effective, the present invention relates to such a projectile having considerable advantages, adding to the advantages of already known projectiles.

Ces avantages supplémentaires sont e.a.:
- une charge explosive très simple et robuste;
- un système très fiable;
- un système insensible aux chocs;
- position exacte et verrouillage des éléments télescopiques dans la position allongée;
- sécurité de début de trajectoire;
- sensibilité à l'impact contrôlable.These additional benefits are:
- a very simple and robust explosive charge;
- a very reliable system;
- a system insensitive to shocks;
- exact position and locking of the telescopic elements in the extended position;
- trajectory start safety;
- controllable impact sensitivity.

A cette fin, le projectile selon l'invention consiste substantiellement en une tête prolongée par une queue tubulaire contenant une charge explosive ainsi qu'une chaîne de mise à feu de cette dernière et dans lequel ladite queue est réalisée en deux parties tubulaires télescopiques dont l'une est solidaire de ladite tête et porte avec cette dernière une première partie de ladite chaîne de mise à feu et dont l'autre porte la partie restante de cette dernière, ce projectile étant pourvu de moyens de guidage répartis sur lesdites deux parties afin de leur assigner une position angulaire en fonction de leur position axiale relative. Ce projectile est caractérisé en ce qu'il présente des moyens assurant la sécurité dans la position stockage-transport; des moyens déterminant la position exacte relative des parties; des moyens déterminant, sous l'effet des gaz propulsifs, une translation relative entre les parties constitutives de la queue; des moyens empêchant une détonaton intempestive et des moyens de sécurité de début de trajectoire.To this end, the projectile according to the invention consists essentially of a head extended by a tubular tail containing an explosive charge as well as a firing chain of the latter and in which said tail is made of two telescopic tubular parts, the l one is integral with said head and carries with the latter a first part of said firing chain and the other of which carries the remaining part of the latter, this projectile being provided with guide means distributed over said two parts in order to assign them an angular position according to their relative axial position. This projectile is characterized in that it has means ensuring safety in the storage-transport position; means determining the exact relative position of the parts; means determining, under the effect of the propellant gases, a relative translation between the constituent parts of the tail; means preventing a untimely detonation and early trajectory safety means.

Pour plus de clarté, un exemple de réalisation de l'invention est décrit ci-après, à titre illustratif et non restrictif, avec référence aux dessins annexés, dans lesquels:

  • la figure 1 représente un projectile selon l'invention en position de stockage et de transport;
  • la figure 2 représente le projectile selon la figure 1 en position de lancement, c.à.d. avant le tir;
  • la figure 3 représente une coupe, à échelle agrandie, selon la ligne III-III de la figure 2;
  • la figure 4 représente, à échelle agrandie, la partie indiquée en F4 à la figure 2;
  • les figures 5 et 6 représentent des coupes selon les lignes V-V et VI-VI de la figure 4;
  • la figure 7 représente le projectile selon la figure 1 en position lancée, c.à.d. après le tir mais avant l'impact, plus spécialement selon la ligne VII-VII de la figure 1;
  • la figure 8 représente une coupe solon la ligne VIII-VIII de la figure 7;
  • la figure 9 représente, à échelle agrandie et en coupe, la partie indiquée en F9 à la figure 7.
  • la figure 10 est une vue semblable à celle de la figure 4, mais pour une variante d'exécution;
  • la figure 11 représente une variante d'exécution de la figure 2.
For greater clarity, an exemplary embodiment of the invention is described below, by way of illustration and without limitation, with reference to the appended drawings, in which:
  • FIG. 1 represents a projectile according to the invention in the storage and transport position;
  • Figure 2 shows the projectile according to Figure 1 in the launch position, i.e. before firing;
  • 3 shows a section, on an enlarged scale, along the line III-III of Figure 2;
  • FIG. 4 represents, on an enlarged scale, the part indicated at F4 in FIG. 2;
  • Figures 5 and 6 show sections along lines VV and VI-VI of Figure 4;
  • Figure 7 shows the projectile according to Figure 1 in the launched position, i.e. after the shot but before the impact, more especially along the line VII-VII of FIG. 1;
  • Figure 8 shows a section on line VIII-VIII of Figure 7;
  • FIG. 9 represents, on an enlarged scale and in section, the part indicated in F9 in FIG. 7.
  • Figure 10 is a view similar to that of Figure 4, but for an alternative embodiment;
  • FIG. 11 represents an alternative embodiment of FIG. 2.

Le projectile représenté dans les figures comporte une tête 1 et une queue tubulaire télescopique 2 avec empennage 3. La queue 2 est réalisée en deux parties 4-5 dont la partie 4 est solidaire de la tête 1 et dont la pa rtie 5 peut coulisser autour de la première. La tête 1 présente à l'intérieur un plateau 6 pourvu d'une pointe de percussion 7 et un dispositif 8 empêchant une détonation involontaire. La tête 1 est fixée sur l'extrémité d'un fourreau 9 dont l'autre extrémité est pourvue d'un manchon 10.The projectile represented in the figures comprises a head 1 and a telescopic tubular tail 2 with tail section 3. The tail 2 is produced in two parts 4-5, the part 4 of which is integral with the head 1 and the part 5 of which can slide around of the first. The head 1 has inside a plate 6 provided with a percussion point 7 and a device 8 preventing an involuntary detonation. The head 1 is fixed to the end of a sheath 9, the other end of which is provided with a sleeve 10.

Autour du fourreau 9 et entre le plateau 6 et le manchon 10 est prévu un corps 11 constituant la charge explosive du projectile. Ce corps 11 présente une seule rainure longitudinale 12 se prolongeant, en son extrémité la plus voisine de la tête 1, par une partie courbe 13.Around the sheath 9 and between the plate 6 and the sleeve 10 is provided a body 11 constituting the explosive charge of the projectile. This body 11 has a single longitudinal groove 12 extending, at its end closest to the head 1, by a curved part 13.

Avec la rainure 12-13 coopère un doigt 14 fixé dans un boîtier 15 monté de manière axialement coulissable sur la partie 5 de la queue 2.With the groove 12-13 cooperates a finger 14 fixed in a housing 15 mounted axially sliding on the part 5 of the tail 2.

Entre les deux parties 4-5 est formée une chambre 16 dans laquelle est logé un ressort 17 agissant contre un épaulement 18 du manchon 10. Ce dernier présente une rainure circulaire 19 communiquant, dans la position de la figure 2, avec des trous radiaux 20 prévus dans ladite partie 5 et communiquant eux-mê mes avec une chambre circulaire 21 dans le boîtier 15. Dans la rainure 19 débouchent deux rainures 22 reliant la rainure 19 avec l'intérieur de ladite partie 5. Le manchon 10 présente deux chambres radiales 23-24 logeant, chacune, une bille 25 sollicitée par un ressort 26.Between the two parts 4-5 is formed a chamber 16 in which is housed a spring 17 acting against a shoulder 18 of the sleeve 10. The latter has a circular groove 19 communicating, in the position of FIG. 2, with radial holes 20 provided for in said part 5 and communicating themselves mes with a circular chamber 21 in the housing 15. In the groove 19 open two grooves 22 connecting the groove 19 with the interior of said part 5. The sleeve 10 has two radial chambers 23-24 housing, each, a stressed ball 25 by a spring 26.

Ladite partie 5 de la queue 2 présente une rainure 27 avec laquelle les billes 25 peuvent coopérer.Said part 5 of the tail 2 has a groove 27 with which the balls 25 can cooperate.

Le boîtier 15 est fixé sur ladite partie 5 au moyen d'une cuvette déformable 29 permettant, après déformation, une translation du boîtier 15 par rapport à la partie 5. Dans une rainure du boîtier 15 est montée une bague élastique de verrouillage 36 qui peut coopérer avec une rainure 37 dans la partie 5.The housing 15 is fixed to said part 5 by means of a deformable cup 29 allowing, after deformation, a translation of the housing 15 relative to the part 5. In an groove of the housing 15 is mounted an elastic locking ring 36 which can cooperate with a groove 37 in part 5.

La chaîne pyrotechnique de mise à feu comprend la pointe de percussion 7, un détonateur 30 et un relais 31 enfoncé dans ladite charge explosive 11. La pointe de percussion 7 ainsi que le relais 31 font partie de la tête 1, tandis que le détonateur 30 est logé dans une encoche du boîtier 15 qui,à son tour, fait partie de la queue tubulaire télescopique 2.The firing pyrotechnic chain comprises the percussion point 7, a detonator 30 and a relay 31 embedded in said explosive charge 11. The percussion point 7 as well as the relay 31 are part of the head 1, while the detonator 30 is housed in a notch in the housing 15 which, in turn, is part of the telescopic tubular tail 2.

Ledit dispositif 8 empêchant une détonation intempestive du projectile en vol est constitué par un amortisseur 32 dont l'amortissement est déterminé par un ressort 33.Said device 8 preventing an inadvertent detonation of the projectile in flight consists of a damper 32, the damping of which is determined by a spring 33.

Enfin, la tête 1 est prolongée par un tube de protection 34 pour la charge explosive 11.Finally, the head 1 is extended by a protective tube 34 for the explosive charge 11.

Le projectile susdécrit s'utilise et fonctionne de la manière suivante.The above-described projectile is used and operates in the following manner.

Dans la position de stockage-transport (figure 1), la partie 5 avec le boîtier 15 occupe une position angulaire par rapport à la tête 1 et la partie 4 d'une telle manière que la pointe 7 est désalignée par rapport au détonateur 30, tout mouvement relatif de la partie 5 par rapport à la tête 1 étant empêché par le contact d'un prolongement 35 contre le plateau 6. Le prolongement 35 peut être fixé soit sur ladite partie 5, soit sur le plateau 6.In the storage-transport position (FIG. 1), the part 5 with the housing 15 occupies an angular position relative to the head 1 and the part 4 in such a way that the point 7 is misaligned with respect to the detonator 30, any relative movement of the part 5 relative to the head 1 being prevented by the contact of an extension 35 against the plate 6. The extension 35 can be fixed either on said part 5 or on the plate 6.

Pour amener le projectile en position de tir (figure 2), une traction est exercée sur la partie 5. Le doigt 14 parcourt la rainure 12 jusqu'au moment où les billes 25 s'engagent dans les encoches 27-28, déterminant ainsi la position relative exacte des parties 4 et 5. Dans cette position le ressort 17 est sous tension.To bring the projectile into the firing position (FIG. 2), a traction is exerted on the part 5. The finger 14 traverses the groove 12 until the balls 25 engage in the notches 27-28, thus determining the exact relative position of parts 4 and 5. In this position the spring 17 is under tension.

Le projectile est prêt à être engagé sur le manchon à l'extrémité du canon d'un fusil utilisé pour son lancement.The projectile is ready to be engaged on the sleeve at the end of the barrel of a rifle used for its launching.

Lors du lancement, les gaz propulsifs entrent, par les rainures 22, dans la rainure circulaire 19 et, ainsi, par les trous 20 dans la rainure 21. Par l'effet des gaz propulsifs sur les parois de cette rainure 21, le boîtier 15, en déformant la cuvette 29, se déplace par rapport à la partie 5. En fin de course la bague élastique 36 tombe dans la rainure 37, assurant ainsi le verrouillage du boîtier 15 par rapport à la partie 5. En même temps, sous l'action des gaz propulsifs, les billes 25 se déplacent dans les deux chambres radiales 23-24 contre l'effort des ressorts 26, ces derniers subissant une déformation tel le qu'ils deviennent inopérants.During launch, the propellants enter, through the grooves 22, in the circular groove 19 and, thus, through the holes 20 in the groove 21. By the effect of the propellant gases on the walls of this groove 21, the housing 15, by deforming the bowl 29, moves relative to the part 5. At the end of the race, the elastic ring 36 falls into the groove 37, thus ensuring the locking of the housing 15 relative to the part 5. At the same time, under the action of the propellant gases, the balls 25 move in the two radial chambers 23-24 against the force of the springs 26, the latter undergoing a deformation such that they become inoperative.

Après que la grenade a quitté le manchon du fusil, les parties 4-5 du projectile s'emboîtent, conjointement avec l'action de détente du ressort 17 et les forces aérodynamiques, pendant que le doigt 14 parcourt d'abord la rainure 12, puis la rainure 13.After the grenade has left the rifle sleeve, the parts 4-5 of the projectile interlock, together with the action of relaxation of the spring 17 and the aerodynamic forces, while the finger 14 first traverses the groove 12, then groove 13.

Lorsque le doigt 14 pénètre dans la rainure 13, il entraîne la rotation de la partie 5 par rapport à l'ensemble 1-4. Le projectile est maintenant dans la position de la figure 7 dans laquelle la chaîne pyrotechnique est alignée.When the finger 14 enters the groove 13, it causes the rotation of the part 5 relative to the assembly 1-4. The projectile is now in the position of FIG. 7 in which the pyrotechnic chain is aligned.

Dans cette position le dispositif 8 empêche toute progression ultérieure de la partie 5 jusqu'à l'impact. En effet, le ressort 33 est calculé pour éviter une détonation intempestive, par exemple par le contact du projectile avec de la pluie tropicale, etc.In this position the device 8 prevents any further progression of the part 5 until impact. Indeed, the spring 33 is calculated to avoid inadvertent detonation, for example by contact of the projectile with rain tropical, etc.

Lors de l'impact, la masse élevée de la partie 5 est mise en mouvement et communique toute son énergie au détonateur lorsque celui-ci frappe le percuteur 7.Upon impact, the high mass of part 5 is set in motion and communicates all of its energy to the detonator when it strikes the striker 7.

Il est à remarquer que la sécurité du début de trajectoire du projectile selon l'invention est contrôlable par la présence du tube 34 avec lequel le boîtier 15 coopère. En effet, pendant le cheminement de ce dernier dans le tube 34, il y travaille comme un dash-pot, freinant en quelque sorte ledit cheminement en évacuant par un orifice calibré l'air présent dans le volume libre 38, ce dernier étant créé lorsque le projectile est en position représenté par la figure 2. L'orifice calibré peut être réalisé par le jeu radial entre le diamètre extérieur du boîtier 15 et le diamètre intérieur du tube 34.It should be noted that the safety of the start of the trajectory of the projectile according to the invention is controllable by the presence of the tube 34 with which the housing 15 cooperates. Indeed, during the path of the latter in the tube 34, it works there as a dash-pot, slowing down said path in a way by evacuating through a calibrated orifice the air present in the free volume 38, the latter being created when the projectile is in the position shown in FIG. 2. The calibrated orifice can be produced by the radial clearance between the outside diameter of the housing 15 and the inside diameter of the tube 34.

Dans une réalisation préférentielle, lesdits ressorts 26 seront calculés d'une telle manière qu'ils restent déformés après lancement du projectile afin d'éviter tout frottement des billes 25 sur la paroi interne de la partie 5.In a preferred embodiment, said springs 26 will be calculated in such a way that they remain deformed after launching the projectile in order to avoid any friction of the balls 25 on the internal wall of part 5.

Comme représenté dans les dessins, une charge d'appoint 40 peut être logée dans le volume libre constitué par le bouchon passe-balle 41 et le manchon 10.As shown in the drawings, a make-up charge 40 can be accommodated in the free volume constituted by the ball-passing plug 41 and the sleeve 10.

La figure 10 montre une exécution dans laquelle est interposé, entre les ressorts 26, un barreau 39 réalisé en une matière frangible pouvant être détruite par le passage de la balle afin de faire disparaître le support des ressorts 26.FIG. 10 shows an embodiment in which is interposed, between the springs 26, a bar 39 made of a frangible material which can be destroyed by the passage of the ball in order to make the support for the springs 26 disappear.

La figure 11 représente une exécution dans laquelle la rainure 12 est prévue dans le tube 34, tandis que la rainure 13 est prévue dans un prolongement 42 du plateau 6.FIG. 11 shows an embodiment in which the groove 12 is provided in the tube 34, while the groove 13 is provided in an extension 42 of the plate 6.

Il est évident que de nombreuses modifications peuvent être apportées à l'exemple susdécrit, sans pour autant sortir du cadre de l'invention. It is obvious that many modifications can be made to the example described above, without going beyond the ambit of the invention.

Claims (15)

1. Grenade télescopique du type ayant une tête (1) prolongée par une queue tubulaire (2) contenant une charge explosive (11) ainsi qu'une chaîne de mise à feu (7-30-31) de cette dernière et dans lequel ladite queue (2) est réalisée en deux parties tubulaires télescopiques (4-5) dont l'une, (4), est solidaire de ladite tête (1) et porte avec cette dernière deux parties (7-31) de ladite chaîne de mise à feu et dont l'autre, (5), porte la partie restante (30) de cette dernière, cette grenade étant pourvue de moyens de guidage (12-13-14) répartis sur lesdites deux parties (4-5) afin de leur assigner une position angulaire en fonction de leur position axiale relative, caractérisée en ce que la grenade présente des moyens (29-35) assurant la sécurité dans la position stockage-transport; et des moyens (22-19-20-21-29) déterminant, sous l'effet des gaz propulsifs, une translation relative entre les parties constitutives (5-15) de la queue (2).1. Telescopic grenade of the type having a head (1) extended by a tubular tail (2) containing an explosive charge (11) as well as a firing chain (7-30-31) of the latter and in which said tail (2) is made of two telescopic tubular parts (4-5), one of which (4) is integral with said head (1) and carries with the latter two parts (7-31) of said placing chain and the other (5) carries the remaining part (30) of the latter, this grenade being provided with guide means (12-13-14) distributed over said two parts (4-5) in order to assign them an angular position as a function of their relative axial position, characterized in that the grenade has means (29-35) ensuring safety in the storage-transport position; and means (22-19-20-21-29) determining, under the effect of the propellant gases, a relative translation between the constituent parts (5-15) of the tail (2). 2.- Grenade télescopique selon la revendication 1, caractérisée en ce que les moyens assurant la sécurité dans la position stockage-transport consistent en un prolongement (35) prévu sur l'extrémité, dirigé vers la tête (1), de la partie (5) de la queue (2).2. Telescopic grenade according to claim 1, characterized in that the means ensuring safety in the storage-transport position consist of an extension (35) provided on the end, directed towards the head (1), of the part ( 5) tail (2). 3.- Grenade télescopique selon la revendication 1, caractérisée en ce que les moyens assurant la sécurité dans la position stockage-transport consiste nt en un prolongement (35) prévu sur le plateau 6.3. Telescopic grenade according to claim 1, characterized in that the means ensuring safety in the storage-transport position consists of an extension (35) provided on the plate 6. 4.- Grenade télescopique selon la revendication 1, caractérisée en ce qu'elle présente des moyens déterminant la position exacte relative des parties (4-5) de la queue (2), ces moyens consistant en au moins une chambre radiale (23) prévue dans un manchon (10) formant l'extrémité arrière, cette chambre formant logement pour une bille (23) sollicitée par un ressort (26), ladite bille (23) pouvant coopérer avec une encoche (27) prévue à cette fin dans la paroi intérieure de ladite partie (5).4. Telescopic grenade according to claim 1, characterized in that it has means determining the exact relative position of the parts (4-5) of the tail (2), these means consisting of at least one radial chamber (23) provided in a sleeve (10) forming the rear end, this chamber forming a housing for a ball (23) biased by a spring (26), said ball (23) being able to cooperate with a notch (27) provided for this purpose in the inner wall of said part (5). 5.- Grenade télescopique selon la revendication 4, caractérisée en ce que le ressort (26) est calculé de telle façon qu'il soit détruit, respectivement déformé, d'une manière définitive par le lancement du projectile.5. Telescopic grenade according to claim 4, characterized in that the spring (26) is calculated in such a way that it is destroyed, respectively deformed, definitively by the launching of the projectile. 6.- Grenade selon la revendication 4, caractérisée en ce qu'entre les ressorts 26 diamétralement opposés est interposé un support en forme de barreau 39 réalisé en une matière frangible.6. Grenade according to claim 4, characterized in that between the diametrically opposite springs 26 is interposed a support in the form of a bar 39 made of a frangible material. 7.- Grenade selon la revendication 1, caractérisée en ce que les moyens déterminant, sous l'effet des gaz propulsifs, une translation relative entre les parties constitutives (5-15) de la queue (2) consistent en la combinaison d'au moins une rainure (22) en communication, d'une part, avec l'intérieur de la partie (5) et, d'autre part, avec une rainure circulaire (19) prévue dans le manchon (10) de la partie (4); et des trous radiaux (20) mettant en communication ladite rainure (19) avec une rainure (21) prévue dans un boîtier (15) disposé autour de l'extrémité de ladite partie (5).7. Grenade according to claim 1, characterized in that the means determining, under the effect of the propellant gases, a relative translation between the constituent parts (5-15) of the tail (2) consist of the combination of at least one groove (22) in communication, on the one hand , with the interior of the part (5) and, on the other hand, with a circular groove (19) provided in the sleeve (10) of the part (4); and radial holes (20) communicating said groove (19) with a groove (21) provided in a housing (15) disposed around the end of said part (5). 8.- Grenade télescopique selon la revendication 7, caractérisée en ce que ledit boîtier (15) porte le détonateur (30).8. Telescopic grenade according to claim 7, characterized in that said housing (15) carries the detonator (30). 9.- Grenade télescopique selon la revendication 7, caractérisée en ce que ledit boîtier (15) porte le doigt (14) coopérant avec les rainures (12-13).9. Telescopic grenade according to claim 7, characterized in that said housing (15) carries the finger (14) cooperating with the grooves (12-13). 10.- Grenade télescopique selon la revendication 9, caractérisée en ce que les rainures (12-13) sont prévues dans le corps (11).10.- Telescopic grenade according to claim 9, characterized in that the grooves (12-13) are provided in the body (11). 11.- Grenade télescopique selon la revendication 9, caractérisée en ce que les rainures (12-13) sont prévues dans le tube 34 et un prolongement du plateau 6.11. Telescopic grenade according to claim 9, characterized in that the grooves (12-13) are provided in the tube 34 and an extension of the plate 6. 12.- Grenade télescopique selon la revendication 7, caractérisée en ce que le boîtier (15) est immobilisé sur la partie (5) de la queue (2) au moyen d'une cuvette (29) pouvant être déformée par l'action des gaz propulsifs sur le boîtier (15).12. Telescopic grenade according to claim 7, characterized in that the housing (15) is immobilized on the part (5) of the tail (2) by means of a bowl (29) which can be deformed by the action of propellant gases on the housing (15). 13.- Grenade télescopique selon la revendication 1, caractérisée en ce qu'elle présente des moyens empêchant une détonation intempestive, ces moyens consistant en une butée (32) contre laquelle de boîtier (15) peut s'appuyer, cette butée étant sollicitée par un ressort (33) dont la tension est déterminante pour la résistance à rencontrer par le projectile avant que la pointe (7) puisse pénétrer dans le détonateur (30).13. Telescopic grenade according to claim 1, characterized in that it has means preventing an inadvertent detonation, these means consisting of a stop (32) against which of the housing (15) can bear, this stop being urged by a spring (33) whose tension is decisive for the resistance to be encountered by the projectile before the point (7) can penetrate the detonator (30). 14.- Grenade télescopique selon la revendication 13, caractérisée en ce que l'amortisseur (32) est monté dans le plateau (6) porteur de la pointe de percussion (7).14.- Telescopic grenade according to claim 13, characterized in that the damper (32) is mounted in the plate (6) carrying the percussion tip (7). 15.- Grenade télescopique selon la revendication 1, caractérisée en ce qu'elle présente des moyens de sécurité de début de trajectoire, ces moyens consistant en un tube (34) fixé sur la tête (1) et entourant la charge (11).15. Telescopic grenade according to claim 1, characterized in that it has safety means for the start of the trajectory, these means consisting of a tube (34) fixed on the head (1) and surrounding the load (11).
EP87201724A 1986-10-07 1987-09-10 Telescopic grenade Expired - Lifetime EP0263548B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2061065 1986-10-07
BE2/61065A BE905563A (en) 1986-10-07 1986-10-07 TELESCOPIC GRENADE.

Publications (2)

Publication Number Publication Date
EP0263548A1 true EP0263548A1 (en) 1988-04-13
EP0263548B1 EP0263548B1 (en) 1991-01-23

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ID=3865833

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Application Number Title Priority Date Filing Date
EP87201724A Expired - Lifetime EP0263548B1 (en) 1986-10-07 1987-09-10 Telescopic grenade

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US (1) US4846070A (en)
EP (1) EP0263548B1 (en)
KR (1) KR920006526B1 (en)
AU (1) AU598306B2 (en)
BE (1) BE905563A (en)
DE (1) DE3767642D1 (en)
GR (2) GR880300143T1 (en)
IN (1) IN167867B (en)
SG (1) SG9192G (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP0431704A1 (en) * 1989-12-07 1991-06-12 FABRIQUE NATIONALE HERSTAL en abrégé FN Société Anonyme Grenade for multi-purpose use
BE1005559A3 (en) * 1991-02-14 1993-10-26 Herstal Sa Safety device, respectively time-delay, for projectile

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
BE1003971A3 (en) * 1990-11-14 1992-07-28 Herstal Sa Improvements shooting.
US5686692A (en) * 1996-09-30 1997-11-11 The United States Of America As Represented By The Secretary Of The Navy Single fuse follow-through grenade
KR101566160B1 (en) * 2013-08-23 2015-11-05 주식회사 한화 Rifle grenade using bullet trap

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FR1394582A (en) * 1963-06-14 1965-04-02 Mefina Sa Hand grenade
FR2214105A1 (en) * 1973-01-11 1974-08-09 Herstal Sa
US4448129A (en) * 1979-11-30 1984-05-15 Fabrique Nationale Herstal Telescopic projectile

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US3960084A (en) * 1973-08-08 1976-06-01 Fabrique Nationale Herstal S.A. En Abrege Fn Fuse for rifle-grenade
US4023499A (en) * 1975-01-07 1977-05-17 Fabrique Nationale Herstal S.A. Fuse for rifle-grenade
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FR1394582A (en) * 1963-06-14 1965-04-02 Mefina Sa Hand grenade
FR2214105A1 (en) * 1973-01-11 1974-08-09 Herstal Sa
US4448129A (en) * 1979-11-30 1984-05-15 Fabrique Nationale Herstal Telescopic projectile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0431704A1 (en) * 1989-12-07 1991-06-12 FABRIQUE NATIONALE HERSTAL en abrégé FN Société Anonyme Grenade for multi-purpose use
US5074217A (en) * 1989-12-07 1991-12-24 Fabrique Nationale Herstal Multiple use grenade
BE1003635A3 (en) * 1989-12-07 1992-05-12 Herstal Sa Granada a multi-purpose.
BE1005559A3 (en) * 1991-02-14 1993-10-26 Herstal Sa Safety device, respectively time-delay, for projectile

Also Published As

Publication number Publication date
US4846070A (en) 1989-07-11
EP0263548B1 (en) 1991-01-23
AU7937287A (en) 1988-04-14
KR920006526B1 (en) 1992-08-07
DE3767642D1 (en) 1991-02-28
IN167867B (en) 1990-12-29
KR880005438A (en) 1988-06-29
BE905563A (en) 1987-04-07
SG9192G (en) 1992-03-20
GR3001529T3 (en) 1992-11-23
GR880300143T1 (en) 1989-01-31
AU598306B2 (en) 1990-06-21

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