EP0448422B1 - Grenade d'exercise tirable par fusil et système d'instruction au tir de grenades à fusil - Google Patents

Grenade d'exercise tirable par fusil et système d'instruction au tir de grenades à fusil Download PDF

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Publication number
EP0448422B1
EP0448422B1 EP19910400398 EP91400398A EP0448422B1 EP 0448422 B1 EP0448422 B1 EP 0448422B1 EP 19910400398 EP19910400398 EP 19910400398 EP 91400398 A EP91400398 A EP 91400398A EP 0448422 B1 EP0448422 B1 EP 0448422B1
Authority
EP
European Patent Office
Prior art keywords
tube
nose
training grenade
grenade
warhead
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.)
Expired - Lifetime
Application number
EP19910400398
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0448422A1 (fr
Inventor
François Ambrosi
Pierre Laurent
Thierry Dupré
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.)
Luchaire Defense SA
Original Assignee
Luchaire Defense 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 Luchaire Defense SA filed Critical Luchaire Defense SA
Publication of EP0448422A1 publication Critical patent/EP0448422A1/fr
Application granted granted Critical
Publication of EP0448422B1 publication Critical patent/EP0448422B1/fr
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
    • F42B8/00—Practice or training ammunition
    • F42B8/12—Projectiles or missiles
    • F42B8/18—Rifle grenades

Definitions

  • the present invention relates to an exercise grenade intended to be fired by means of a rifle.
  • a completely inert grenade comprises a metal tube provided with a rear stabilization stabilizer and a solid front part which closes said tube, this front part carrying a hollow warhead containing an inert marking substance.
  • the marking substance contained in the hollow warhead can be plaster, barium sulphate or any other powdery or liquid product.
  • the invention also relates to a system for training in the shooting of rifle grenades, comprising the abovementioned exercise grenade and its associated propellant cartridge, and allowing automatic operation of the rifle equipped with a magazine for real cartridges.
  • the warhead is integral with the metal tube which is commonly called a sleeve tube, or a ball.
  • Exercise grenades comprising a cartridge tube, the interior of which has a bullet trap which absorbs the bullet from a real cartridge and which moreover requires the addition of propellant powder.
  • This bullet trap is destroyed with each shot, as well as the powder, so that no part of these grenades is recoverable.
  • these grenades are fired by means of a propellant cartridge which does not have the external form of a cartridge with real bullet, so that they are not usable in the magazines of the automatic rifles, nor ensure a automatic resetting of these rifles.
  • the warhead ends with a rounded point.
  • This warhead has a relatively high conical shape, so that upon impact at a low angle of incidence, this warhead may not be broken. In this case, the location of the impact is not marked.
  • the purpose of the present invention is to create an exercise grenade whose warhead is liable to break, even during an impact at very low incidence and on very loose soil and without the massive front part of the tube risking '' be damaged by the shock after destruction of the warhead.
  • the invention thus relates to an exercise grenade intended to be fired by means of a rifle, and a propellant cartridge, this grenade comprising a metal tube provided with a rear stabilizing stabilizer and a solid front part which closes said tube, this front part carrying a hollow warhead containing a marking substance, this warhead being detachably fixed by fitting into the massive front part of the tube, this warhead being strong enough to support the shot, but being destructible on impact.
  • the massive front part of the tube is made in one piece with this tube, the diameter of this part being substantially equal to or slightly greater than the rest of the tube, the warhead fitted on this massive front part has a shoulder.
  • internal annular bearing on the front surface of the massive part of the tube, and the front end of the warhead has a flat surface, this warhead being shaped so that its wall can break when it strikes the ground.
  • the exercise grenade according to the invention is thus inexpensive, since the most expensive part, that is to say the tube, can be recovered with each shot.
  • the massive front part of the tube gives it great mechanical resistance which allows it to absorb impact shocks.
  • this massive front part of the tube is capable of trapping a real bullet inadvertently fired. This massive part thus guarantees great security to soldiers during exercise.
  • the warhead has an outer wall having thinned areas.
  • said thinned areas consist of grooves made on the surface of the wall of the warhead.
  • said grooves extend in the longitudinal direction of the warhead.
  • the warhead has a rear end piece which fits on the massive part of the tube. This interlocking allows both the removal of the destroyed warhead to recover the tube and the replacement on the latter of a new warhead.
  • the warhead can be made in one piece, by molding in a frangible plastic material such as polystyrene.
  • the exercise grenade intended to be fired by means of a rifle comprises a metal tube 1 provided with a rear stabilizing stabilizer 2 and a solid front part 3 which closes said tube .
  • This massive front part carries a hollow warhead 4 containing a marking substance 5.
  • the warhead 4 is removably attached to the massive front part 3 of the tube 1, this warhead 4 being strong enough to support the shot, but being destructible on impact.
  • the tube 1 has for example a total length equal to 235 mm and a diameter equal to 33 mm.
  • the warhead 4 has a wall having thinned areas 6 formed by grooves formed on the internal surface of the wall of the warhead 4 and in the longitudinal direction of the latter. At the level of these grooves 6, the number of which is equal to six in the example shown, the thickness of the wall of the warhead 4 is reduced substantially by half.
  • Figure 4 shows that the cross section of the grooves 6 is in an arc, the radius of curvature of which can be of the order of 4 mm.
  • Figure 5 shows on the other hand that the depth of the grooves 6 gradually increases from the rear to the front of the warhead 4 and stop at a certain distance from the front end 7 of the warhead.
  • the warhead 4 has a rear end piece 8 which fits onto the solid part 3 of the tube 1.
  • the thickness of the wall of this rear end piece 8 is greater than that of the wall of the front part 4 of the warhead.
  • the internal surface 8a of this end piece has a series of ribs 8b aligned in the axis of the warhead 4. These ribs 8b have a height of the order of a few tenths of a mm. These ribs 8b make it possible to center the warhead 4 with respect to the tube 1 and create air passages which prevent air compression when the nozzle 8 is engaged on the tube 1.
  • the front part 4 of the warhead has a slightly frustoconical shape.
  • the thickness of the wall of the latter gradually decreases between the large base and the small flat base which corresponds to the end 7 of the warhead of said frustoconical part.
  • This small flat base forms a sharp angle ridge with the side wall of the warhead.
  • the warhead 4, including the rear end piece 8, is molded in one piece from relatively breakable plastic material such as polystyrene.
  • the internal surface 8a (see FIG. 3) of the rear end piece 8 of the warhead 4, intended to be fitted onto the solid part 3 of the tube 1 has at its end adjacent to the warhead proper, an annular shoulder 9 on which is supported by a removable plug or not or a closure plate 10 (see Figure 1).
  • This plug or this plate 10 is made of flexible plastic material or not and is based on the shoulder 9 of the end piece 8. Depending on the case, they are fitted, glued or welded to this shoulder 9.
  • the tube 1 is made in a single piece of metal or alloy such as aluminum or other light alloy resistant to impact. It is designed in such a way that it is capable of trapping a ball fired by mistake and of inflating the massive part 3 enough to alert the shooting officer in a visible and non-maskable manner of this error. In addition, the tube is protected by a colored surface treatment which cracks under the action of the above swelling thus creating a very visible ring.
  • the rear tail unit 2 of the tube 1 comprises a sleeve 14 carrying fins 15.
  • This sleeve 14 is mounted in an annular recess 16 formed at the rear of the tube 1 which axially retains the tail unit 2.
  • This empennage 2 is advantageously molded in a single piece of plastic.
  • FIG. 1 shows that the bottom 17 of the tube 1 has an axial cavity 18 of dimension adapted to the end of a bale.
  • This cavity 18 has at its entrance a conical surface flared towards the outside which is extended towards the front of a cylindrical blind hole of diameter equal to 2 mm.
  • This cavity 18 is used to trap the bullet of a real cartridge fired by mistake, instead of a propellant cartridge without a bullet.
  • the exercise grenade just described has ballistic characteristics identical to that of a real grenade.
  • the warhead 4 bursts and the marking powder 5 spreads on the ground.
  • This bursting of the warhead 4 is the consequence of the choice of the material which constitutes it, of the thickness of its wall, of the presence of the weakening zones 6, of the shape and of the arrangement of these.
  • the tube 1 which is the most expensive part can be recovered to reconstitute a grenade ready to be used.
  • This operation can be carried out manually, without tools, on the very ground of the shooting.
  • the replacement of a new warhead on the tube can be carried out manually without any tools.
  • the shape and the arrangement of the weakening zones 6 on the warhead 4 can be modified.
  • the fixing by fitting of the warhead 4 on the end of the tube can be replaced by other means.
  • the tip 8 of the warhead could have an internal thread which can be screwed manually onto an external thread at the end of the tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
EP19910400398 1990-02-21 1991-02-15 Grenade d'exercise tirable par fusil et système d'instruction au tir de grenades à fusil Expired - Lifetime EP0448422B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9002116A FR2658599B1 (fr) 1990-02-21 1990-02-21 Grenade d'exercice tirable par fusil et systeme d'instruction au tir de grenades a fusil.
FR9002116 1990-02-21

Publications (2)

Publication Number Publication Date
EP0448422A1 EP0448422A1 (fr) 1991-09-25
EP0448422B1 true EP0448422B1 (fr) 1994-03-16

Family

ID=9393972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910400398 Expired - Lifetime EP0448422B1 (fr) 1990-02-21 1991-02-15 Grenade d'exercise tirable par fusil et système d'instruction au tir de grenades à fusil

Country Status (3)

Country Link
EP (1) EP0448422B1 (ja)
JP (1) JPH0618198A (ja)
FR (1) FR2658599B1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004017466A1 (de) * 2004-04-08 2005-11-03 Nico-Pyrotechnik Hanns-Jürgen Diederichs GmbH & Co. KG Geschoss mit Markierung des Auftreffpunktes
DE102007016488B3 (de) * 2007-04-05 2009-01-22 Diehl Bgt Defence Gmbh & Co. Kg Penetrationsfähiges Geschoss

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE478406A (ja) * 1947-08-01 Energa
BE630044A (ja) * 1962-04-16 Energa
DE1199660B (de) * 1963-04-05 1965-08-26 Karlsruhe Augsburg Iweka Blindgeschoss
DE1216736B (de) * 1964-04-23 1966-05-12 Dynamit Nobel Ag Zerfallgeschoss fuer Manoevermunition
FR2468948A1 (fr) * 1979-11-05 1981-05-08 Alsetex Dispositif de visualisation du nombre de coups tires avec une munition d'exercice
DE3642414A1 (de) * 1986-12-11 1988-06-23 Feistel Pyrotech Fab Uebungspatrone fuer rueckstossfreie abwehrwaffen

Also Published As

Publication number Publication date
EP0448422A1 (fr) 1991-09-25
FR2658599A1 (fr) 1991-08-23
FR2658599B1 (fr) 1994-06-17
JPH0618198A (ja) 1994-01-25

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