EP0267090B1 - Grenade à fusil - Google Patents

Grenade à fusil Download PDF

Info

Publication number
EP0267090B1
EP0267090B1 EP87402311A EP87402311A EP0267090B1 EP 0267090 B1 EP0267090 B1 EP 0267090B1 EP 87402311 A EP87402311 A EP 87402311A EP 87402311 A EP87402311 A EP 87402311A EP 0267090 B1 EP0267090 B1 EP 0267090B1
Authority
EP
European Patent Office
Prior art keywords
wall
tube
charge
bullet
grenade
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
EP87402311A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0267090A1 (fr
Inventor
François Ambrosi
Jean-Pascal Guardiola
Michel Schilling
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 SA
Original Assignee
Luchaire 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 SA filed Critical Luchaire SA
Priority to AT87402311T priority Critical patent/ATE61874T1/de
Publication of EP0267090A1 publication Critical patent/EP0267090A1/fr
Application granted granted Critical
Publication of EP0267090B1 publication Critical patent/EP0267090B1/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
    • 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

Definitions

  • the present invention relates to a rifle grenade comprising at one of its ends a tube intended to be threaded on the barrel of a rifle and at its other end a rocket and a head containing an explosive charge.
  • the grenade tube comprises, upstream of the rocket, a bullet trap and a booster charge of propellant powder which may be in the form of loose powder or a block, this charge of make-up being protected from external aggressions by a sealing device.
  • This sealing device consists of a cup made of a thin sheet of metal such as tin or aluminum or plastic, which covers the end of the make-up charge.
  • the bullet trap and the make-up charge are retained at the internal wall of the tube by a support which can be in the form of a disc or a square plate on which the cup made of thin metal sheet is applied. or plastic. This disc or this plate is pierced by an axial hole of diameter greater than the caliber of the rifle bullet.
  • the thin cup When fired, the thin cup is torn under the effect of the gas pressure from the rifle cartridge, and these generate the peripheral ignition of the booster charge which surrounds the bullet trap.
  • the bullet After destruction of the thin metal cup the bullet crosses the axial hole of the disc or plate and the bullet enters the bullet trap.
  • the initial speed of the grenade is determined on the one hand by the energy of the gases of the rifle cartridge and on the other hand by the pressure of the combustion gases of the booster charge.
  • This known embodiment has many drawbacks.
  • the regularity of ignition of the make-up charge depends closely on the mechanical characteristics of the cup, since the rupture of the latter is controlled by the pressure of the gases in the cartridge. Thus, if the mechanical characteristics of this cup are irregular, the ignition of the booster charge is itself irregular, which correlatively affects the effectiveness of the grenade.
  • the regularity of ignition of the make-up charge can be affected by the presence of water or impurities (mud, sand) in the grenade tube. In fact, during firing, this water or these impurities are propelled into the combustion chamber and can thus disturb the combustion of the make-up charge.
  • water or impurities mud, sand
  • BE-A-827 664 discloses in particular a rifle grenade according to the preamble of claim 1 and comprising at one of its ends a tube intended to be threaded on the barrel of a rifle and at its other end a rocket and a head containing an explosive charge.
  • the tube comprises, upstream of the rocket, a bullet trap and a booster charge of propellant powder protected from external aggressions by a sealed wall. This make-up charge is located downstream of the aforementioned wall and has an axial recess in which the bullet trap is located.
  • This grenade has the drawbacks mentioned above.
  • the object of the present invention is to remedy the drawbacks of the embodiments described above, by creating a launching tube whose implementation is simpler and whose operation is safer and more reliable than those of the abovementioned embodiments.
  • the grenade is characterized in that the sealed wall is made in one piece with a tubular element of said tube, this wall having an axial cavity determining a reduction in the thickness of this wall sufficient for the bullet fired by the rifle can pierce this wall without tearing it off.
  • this sealed wall is made in one piece with the entire tube.
  • the invention also makes it possible to eliminate the risks of accidental damage to this sealed wall and makes any sabotage more complex.
  • the orifice which allows the ignition of the make-up powder by the gases of the rifle cartridge is produced by the bullet and not by the pressure of these gases, which has the following advantages:
  • the ignition of the booster charge is not influenced by the presence of water, sand or mud in the pomegranate tune
  • the sealed wall made in one piece with an element of the tube or with the whole of the tube increases the rigidity of the latter and ensures better containment of the make-up charge.
  • the thickness of the cylindrical wall of the tube can be reduced, which makes it possible to lighten this tube and to reduce its cost.
  • a person skilled in the art could fear that the design of a tight wall in one piece with the tube capable of being traversed by the bullet would cause the bursting of this wall and the projection of fragments backwards which could injure the shooter.
  • the axial cavity formed in the sealed wall is located on the face of this wall opposite to the face receiving the ball.
  • This arrangement makes the cavity more accessible and therefore easier to produce, for example by milling the pre-rated wall.
  • the face of the sealed wall which is opposite to the cavity remains flat and smooth, so that it limits the possibilities of retaining water, mud or other impurities.
  • the cavity formed in the wall has a flared section, for example a section in an arc of a circle or triangular, so that the point of smallest thickness is located on the axis of the tube and that the thickness of the wall gradually increases towards the outside of this axis.
  • This arrangement allows the ball to pierce in the wall a hole of regular shape without risk of uncontrolled bursting of the entire sealed wall.
  • FIG. 1 is a view in partial longitudinal section of a grenade according to the invention
  • FIG. 2 is a view in longitudinal section on an enlarged scale of the part of the tube comprising the sealed wall
  • Figure 3 is a view similar to Figure 2 showing the wall pierced immediately after the passage of the ball
  • FIG. 4 is a sectional view along the plane IV-IV of Figure 2.
  • the rifle grenade comprises at one of its ends a metal tube 1 intended to be threaded on the barrel of a rifle 2 (shown in dotted lines) and at its other end a rocket 3 and a head 4 containing an explosive charge 5.
  • the tube 1 comprises, upstream of the rocket 3, a bullet trap 6 and an auxiliary charge 7 of propellant powder in the form of a block having an axial recess 8.
  • the rear end of the tube 1 carries a tail unit 9.
  • the rocket 3, the head 4, the explosive charge 5, the bullet trap 6 are elements known in themselves, which it is therefore not necessary to describe here. The same is true of their method of assembly.
  • the face 7a of the make-up charge block 7 opposite the explosive head 4 is (see also FIG. 2) separated from the rear end of the tube 1 by a sealed wall 10.
  • the sealed wall 10 is made in one piece with the rest of the metal tube 1.
  • this wall 10 has an axial cavity 11 determining a reduction in the thickness of this wall, sufficient for the bullet fired by the powerful rifle pierces this wall 10 without tearing it off, as it will be explained in more detail later.
  • the axial cavity 11 is located on the face 10a of the wall 10 adjacent to the block 7 of additional charge and is therefore opposite the face receiving the ball.
  • This cavity 11 has a flared section, for example in an arc, centered on the axis of the tube 1, as indicated in FIG. 2.
  • This cavity 11 can also be conical. Plan view (see Figure 4), the cavity 11 is circular but may have a shape not of revolution.
  • the cavity 11 has a diameter substantially equal to or slightly greater than the caliber of the bullet.
  • the face 10a of the sealed wall 10 adjacent to the make-up charge block 7 is connected to the internal face 1a of the tube 1 by a fillet 10b.
  • the grenade tube according to the invention can be easily manufactured from a preform molded or forged from metal or molded from composite plastic or from a solid bar of sufficiently resistant light alloy. In the same way it can be made of composite with an insert integrating the wall.
  • the thickness of the wall 10 of the tube 1 must be sufficient to withstand the impact of the bullet. In other words, the ball must be able to pierce the wall opposite the cavity 11 without tearing off the latter.
  • the minimum thickness of the wall 10 in line with the cavity 11 is of the order of 0.5 mm.
  • the above-mentioned thicknesses can vary depending on the nature of the alloy used.
  • the wall 10 provides greater rigidity to the tube 1 than in the case of known embodiments, so that the thickness of the side wall of the tube 1 can be reduced, which makes it possible to lighten the latter.
  • the bullet 16 When the bullet 16 is fired, the latter pierces a hole 12 (see FIG. 3) in the zone of reduced thickness adjacent to the cavity 11, without tearing off the rest of the wall 10 and thus enters the bullet trap 6 , deforms it, creating a space between the bullet trap and the wall.
  • the propellant gases thereof penetrate into the interior cavity of the booster charge block 7 and ensure that the latter is ignited.
  • the pressure of the combustion gases of this powder propels the grenade at a predetermined speed and cocks the rocket.
  • the hole 12 is formed not by the pressure of the propellants of the bullet, but by the bullet itself, these propellants are not likely to propel into the internal cavity of the make-up charge block 7 the humidity or other impurity possibly contained inside the tube 1, which would risk inhibiting the combustion of the block 7 of additional charge and which is retained by the part of the partition 10 surrounding the hole 12.
  • the cavity 11 is adjacent to the make-up charge block 7 and therefore located in a sealed chamber, this cavity 11 is not likely to retain moisture or other impurities liable to affect the operation of the grenade.
  • the wall 10 is in one piece with the rest of the tube 1, this wall is not likely to be damaged during assembly of the grenade, so that the latter has safety and security characteristics. reliability significantly improved compared to those of known embodiments.
  • the wall 10 is part of a tubular insert 13 in which is housed the additional charge 7.
  • This insert 13 can be of a material different from the tube 1, such as a composite plastic material loaded with fibers, or conversely the rest of the tube can be made of composite plastic material and the insert 13 metal.
  • the wall 10 is part of a tubular member 14 attached to the rest of the tube 1, for example by screwing.
  • the wall 10 forms part of the rear part of the tube 1 to which is attached, for example by screwing, the part 15 of the tube which contains the make-up charge 7.
  • the shape of the cavity 11 can be different from that shown, provided that the latter provides the wall 10 with an area of axial weakness which can be pierced by the bullet, without tearing away from the rest of the wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Telescopes (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Fats And Perfumes (AREA)
  • Tents Or Canopies (AREA)
  • Silicon Polymers (AREA)
  • Electrotherapy Devices (AREA)
  • Materials For Medical Uses (AREA)
EP87402311A 1986-10-17 1987-10-16 Grenade à fusil Expired - Lifetime EP0267090B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402311T ATE61874T1 (de) 1986-10-17 1987-10-16 Gewehrgranate.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8614437A FR2605399B1 (fr) 1986-10-17 1986-10-17 Grenade a fusil
FR8614437 1986-10-17

Publications (2)

Publication Number Publication Date
EP0267090A1 EP0267090A1 (fr) 1988-05-11
EP0267090B1 true EP0267090B1 (fr) 1991-03-20

Family

ID=9339940

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402311A Expired - Lifetime EP0267090B1 (fr) 1986-10-17 1987-10-16 Grenade à fusil

Country Status (10)

Country Link
US (1) US4793259A (es)
EP (1) EP0267090B1 (es)
JP (1) JPS63153400A (es)
AT (1) ATE61874T1 (es)
BR (1) BR8705540A (es)
CA (1) CA1277527C (es)
DE (1) DE3768763D1 (es)
ES (1) ES2002604B3 (es)
FR (1) FR2605399B1 (es)
IL (1) IL84165A (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8813065D0 (en) * 1988-06-02 1988-08-24 Galt Composites Ltd Bullet trap
BE1003971A3 (fr) * 1990-11-14 1992-07-28 Herstal Sa Perfectionnements aux projectiles.
FR2685468B1 (fr) * 1991-12-24 1995-04-28 Luchaire Defense Sa Tube douille pour grenade a fusil pouvant retenir les fragments de la balle.
US6408765B1 (en) * 1999-03-02 2002-06-25 State Of Israel-Ministry Of Defense Armament Development Authority-Rafael Door breaching device with safety adapter
US6523478B1 (en) * 2001-09-10 2003-02-25 The United States Of America As Represented By The Secretary Of The Army Rifle-launched non-lethal cargo dispenser
US6981449B2 (en) * 2003-12-22 2006-01-03 The United States Of America As Represented By The Secretary Of The Army Projectile launch assembly and method
US7526999B1 (en) * 2006-02-13 2009-05-05 Timan Bruce A Less-lethal force device
US8430029B2 (en) * 2008-01-31 2013-04-30 Bae Systems Information And Electronic Systems Integration Inc. Inertial delay fuse
US9612074B2 (en) 2013-02-20 2017-04-04 Christian Ellis Less-lethal force device impact ratio
EP3397920A4 (en) 2015-12-30 2019-07-31 Christian Ellis DEVICE FOR LESS DEADLY FORCE
CN109211030B (zh) * 2018-10-19 2023-08-22 中国人民武装警察部队工程大学 一种撞击击发式增程防暴枪榴弹

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE300194C (es) *
FR1155603A (fr) * 1956-07-07 1958-05-06 Hispano Suiza Sa Perfectionnements apportés aux dispositifs de mise à feu des engins explosifs
BE754543A (fr) * 1969-08-07 1971-02-08 Allied Res Ass Inc Dispositif permettant de propulser des grenades a fusil avec des cartouches a balle
BE804791A (fr) * 1973-09-13 1974-01-02 Herstal Sa Dispositif de lancement pour grenade
BE827664R (fr) * 1973-09-13 1975-10-08 Dispositif de lancement pour grenade
US4013011A (en) * 1975-04-08 1977-03-22 Fabrique Nationale Herstal S.A. Throwing device for grenades
FR2368686A1 (fr) * 1976-10-20 1978-05-19 France Etat Grenade fumigene
FR2517424B1 (fr) * 1981-11-27 1985-06-14 France Etat Piege a balle pour grenade a fusil
US4567831A (en) * 1984-06-11 1986-02-04 The State Of Israel, Ministry Of Defence, Military Industries Bullet trap and bullet deflector in rifle grenade

Also Published As

Publication number Publication date
ATE61874T1 (de) 1991-04-15
US4793259A (en) 1988-12-27
JPS63153400A (ja) 1988-06-25
BR8705540A (pt) 1988-05-24
ES2002604B3 (es) 1991-11-01
IL84165A (en) 1992-08-18
EP0267090A1 (fr) 1988-05-11
DE3768763D1 (de) 1991-04-25
CA1277527C (en) 1990-12-11
FR2605399A1 (fr) 1988-04-22
ES2002604A4 (es) 1988-09-01
IL84165A0 (en) 1988-03-31
JPH0447240B2 (es) 1992-08-03
FR2605399B1 (fr) 1989-01-27

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