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
  • F42B8/26—Hand grenades

Definitions

• the invention relates to the field of firearms and more precisely a fragmentable grenade into projectiles of low kinetic energy so as not to cause serious injuries to the persons affected by them but nevertheless to constitute a sufficiently deterrent weapon against one. violent disturbers of public order.
• the grenades currently used by the police when they are in critical situation most often contain a product capable of turning into a gas having an unpleasant physiological action on the human being, for example a tear gas.
• these grenades are not suitable for all situations, and in particular in the event of encirclement or confinement of the user inside a room, because the inconvenient action of the gas applies equally well to this user only to troublemakers.
• the invention aims to remedy this drawback by creating a grenade allowing its users such as members of the police, in critical situation of policing exceeded, to disperse or at least temporarily destabilize delinquents or violent troublemakers and thus allow themselves the few seconds necessary for a decision to open up or to be arrested, even in a confined space such as a room.
• the invention relates to a grenade fragmentable into projectiles of low kinetic energy, of the type comprising an igniter device associated with a detonator housed in a sheath, grenade characterized in that it comprises outside the sheath, for take the place of a grenade body, individual studs made of non-metallic material each secured to the sheath by assembly means adapted to disassemble during an explosion of the detonator, so that this explosion causes the projection of the individual pads.
• FIG. 1 is a schematic longitudinal section of part of a grenade according to the invention
• FIG. 2 is a schematic cross section of the grenade of FIG. 1, along line II-II of this figure, and
• FIG. 3 is an enlarged view of part of Figure 2, better showing the shape of a stud forming part of a grenade according to the invention and the attachment of this stud to the sheath for the detonator.
• the grenade part of which is shown diagrammatically in the figures, comprises a tubular sheath 1 of generally cylindrical shape adapted to internally receive a detonator 2 associated with an igniter 3;
• the igniter of the igniter-detonator assembly is that of a hand grenade, but naturally an igniter intended to allow the launch of the grenade by means of a firearm, for example such as that known commercially and in the art under the name of igniter BTR, is perfectly usable and interchangeable with this manual igniter 3;
• the sheath 1 is tubular, open at one end for the introduction of the detonator and the fixing of the igniter, and comprises at its end a bottom 11;
• the detonator contains an explosive of the "civilian" type, therefore not very rapid, so that the pressure increase is less than that of a conventional grenade.
• the grenade comprises, instead of a conventional body made for example of cast iron or light alloy (depending on whether the grenade is of the "defensive” or “offensive” type) containing an explosive product, a body made up of separate studs made of non-material metallic each secured to the sheath by means of mutual assembly of the stud and the sheath.
• the studs 4 can also, while remaining independent of each other, be more secured to the sheath 1 by being pressed against it; if they are, they can be either as a whole, by a single surrounding body, or in groups, by several bodies; it is thus possible, for example, to have an overall connection of the studs to the sheath by means, as an entourage member, of an envelope 5 such as an envelope of heat-shrinkable material, disposed around all of the studs 4 and heat-shrunk on them, as in the figures, or have a joining in groups such as a strapping by means of O-rings.
• an envelope 5 such as an envelope of heat-shrinkable material
• the pads 4 are made of a flexible, elastically deformable material, for example an elastomer such as natural rubber or a synthetic equivalent.
• the attachment of the individual studs 4 to the sheath can be ensured by various assembly means provided that these means allow the studs to disassemble from the sheath easily during an explosion of the detonator and to be thrown in the radial direction outwards relative to the sheath with a regular spatial distribution and neighboring respective energies.
• each stud comprises, projecting from a body 41, a stud 42 having an outer shape approximately of revolution but comprising a longitudinal slot and a bulge s' extending in particular in a direction perpendicular to the plane of the slot, in the region of its end, stud adapted to be clipped into a hole 12 in the side wall of the sheath, the diameter of which is less than the largest external dimension of the bulge but greater than that of a narrowed area of the stud by which it is connected to the body of the stud.
• each stud 4 can be secured to the sheath by several pins 42 and several corresponding holes 12 in the sheath.
• Other types of assemblies are also possible, for example with dovetail, by hooking, by gluing, etc.
• the assembly is firm enough to prevent separation of the studs from the sheath under the effect of a small force exerted on them (for example that due to the friction of the studs against the fabric of a garment during the introduction or removal of the grenade from a pocket of this item of clothing), they may not otherwise be tightened against the sheath by one (or more) surrounding member (s).
• the body 41 of the pads can take a large number of shapes, depending on the arrangement of the pads around the sheath.
• the studs 41 are juxtaposed annularly around the sheath, in several identical crowns themselves juxtaposed in succession along the central axis of the sheath 1 to form a body of grenade externally general cylindrical shape.
• the body 41 of the studs 4 has a general shape in a straight prism whose base (therefore the cross section) is approximately in the shape of an isosceles trapezium whose parallel rectilinear sides are replaced by concentric curvilinear sides to constitute a circular crown section, the short side belonging to the face of the body 41 of the stud intended to be attached to the sheath and connected to the stud 42 having a radius approximately equal to the outside radius of the sheath 1, and the angles of which are replaced by rounded zones; the dihedral angle formed by the inclined lateral faces of the prism naturally depends on the number of studs constituting the crown, and in the case of six studs, it is approximately 60 degrees; in general, this angle is approximately equal to 360 degrees / n, n being the number of studs extending along the crown.
• each stud 4 may include a positioning groove for this surround member.
• the material constituting the sheath can be the same as that constituting the studs.
• the igniter device may as well be a hand grenade igniter as a rifle grenade igniter or the like.
• the igniter device comprises a plug to which a lever is attached, and means for attaching the lever to the plug comprising a pin attached to a pulling ring; in the second, it includes a self-propelling plug containing a charge intended to cause the projection of the grenade and a pyrotechnic delay chain, provided with a percussion primer, the assembly, playing the role of a cartridge, being intended to be introduced into the barrel of the rifle, which makes the grenade independent of the weapon itself which triggers the propulsion process.
• the grenade is projectable by hand, and in the second by means of a firearm such as a rifle as is conventional: the user shoots, the grenade itself, projected, is separates from the igniter device, and can reach a distance close to a hundred meters, the explosion occurring, depending on the setting of the pyrotechnic chain, with a delay of approximately 2.5 to 6 seconds; in both cases, the explosion leads to the disassembly of the studs 4 and the sheath 1, and in most cases the at least partial destruction of the assembly means 42, 12, and of the sheath 1 as well as of the member or members surrounding 5 of the studs, if there are any; the studs 4 are then projected as in the case of a conventional grenade, but with less violence as a result of the choice of the explosive of the detonator and the absence of explosive around the sheath of the detonator, and an impact relatively amortized thanks to the choice of material constituting the studs.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
• Peptides Or Proteins (AREA)
• Manipulator (AREA)
• Toys (AREA)
• Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
• Professional, Industrial, Or Sporting Protective Garments (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=9484625

Family Applications (1)

Country Status (10)

Cited By (1)

Families Citing this family (6)

Family Cites Families (4)

• 1995
  • 1995-11-16 FR FR9513590A patent/FR2741436B1/fr not_active Expired - Fee Related
• 1996
  • 1996-11-12 AT AT96938299T patent/ATE193373T1/de active
  • 1996-11-12 EP EP96938299A patent/EP0861413B1/de not_active Expired - Lifetime
  • 1996-11-12 AU AU75771/96A patent/AU7577196A/en not_active Abandoned
  • 1996-11-12 PT PT96938299T patent/PT861413E/pt unknown
  • 1996-11-12 DE DE69608569T patent/DE69608569T2/de not_active Expired - Lifetime
  • 1996-11-12 WO PCT/FR1996/001784 patent/WO1997018435A1/fr active IP Right Grant
  • 1996-11-12 ES ES96938299T patent/ES2146912T3/es not_active Expired - Lifetime
  • 1996-11-12 TR TR1998/00867T patent/TR199800867T2/xx unknown
• 2000
  • 2000-08-14 GR GR20000401877T patent/GR3034183T3/el unknown

Non-Patent Citations (1)

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