EP1856474A2 - Grenade, 40mm x 53. grande vitesse, double usage - Google Patents

Grenade, 40mm x 53. grande vitesse, double usage

Info

Publication number
EP1856474A2
EP1856474A2 EP06710189A EP06710189A EP1856474A2 EP 1856474 A2 EP1856474 A2 EP 1856474A2 EP 06710189 A EP06710189 A EP 06710189A EP 06710189 A EP06710189 A EP 06710189A EP 1856474 A2 EP1856474 A2 EP 1856474A2
Authority
EP
European Patent Office
Prior art keywords
explosive
projectile
grenade
cartridge case
fuze
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.)
Withdrawn
Application number
EP06710189A
Other languages
German (de)
English (en)
Inventor
Alexander Antartis
Vasileios Boumpoutsis
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.)
Hellenic Defence Systems SA
Original Assignee
Hellenic Defence Systems 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 Hellenic Defence Systems SA filed Critical Hellenic Defence Systems SA
Publication of EP1856474A2 publication Critical patent/EP1856474A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
    • F42B12/22—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
    • F42B1/02—Shaped or hollow charges
    • F42B1/028—Shaped or hollow charges characterised by the form of the liner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/02—Driving bands; Rotating bands
    • 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
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/025—Cartridges, i.e. cases with charge and missile characterised by the dimension of the case or the missile

Definitions

  • the present invention pertains to the high velocity, dual purpose 40 mm X 53 grenade, used against personnel and light armoured vehicles.
  • the high velocity, dual purpose 40mm X 53 grenade is a complete one piece round, consisting of three main assemblies : the projectile body (9), the fuze (12) and the cartridge case (4).
  • Fig. 1 (longitudinal section) illustrates the main parts of the grenade currently used, which is the technical base of the present patent.
  • Fig. 2 illustrates the basic parts, disassembled, in order to have a more concrete view of the form of each part. To be more specific as to the characteristics of the parts, they are described in connection with the contribution of each one to the overall grenade function :
  • the round is fed into the weapon chamber.
  • the firing pin of the weapon strikes the percussion primer (1).
  • the primer ignites the propellant charge (3) contained in the high pressure chamber.
  • the expanding gases from the burning propellant charge are forced into the low pressure chamber (6) through the vent holes (5) and they spin the projectile through the twist rifled part of the gun barrel.
  • the projectile (consisting of parts 12, 7, 8, 9, 10 and 11) separates from its cartridge case (4) and the copper rotating band (7) under the influence of the gases produced by the propellant charge guides the projectile towards the muzzle of the barrel, at the same time causing it to spin around its longitudinal axis.
  • the projectile is filled with explosive charge (8) on which the copper truncate cone (10) is fitted, so as to form the hollow charge configuration.
  • the fuze (12) is threaded onto the projectile nose.
  • the fuze function (either by impact with the target, or by self destruction) initiates the spit-back (11), which is fitted on the big base of the truncate cone (10).
  • the spit-back is a hollow charge which develops a jet opposite to that developed by the projectile, which in turn detonates the explosive (8) through the cylindrical small base protrusion of the copper truncate cone.
  • the explosive charge detonates the hollow charge (i.e.
  • the copper truncate cone (10) which discharges a plasma jet directed towards the target, while at the same time it fragments the internally pre-fragmented steel jacket (9), dispersing the fragments circumferentially.
  • the dual purpose of the grenade i.e. the hollow charge against light armoured targets and the fragmentation against personnel.
  • the main disadvantage that this type of grenade presents is that the piercing depth of the steel target is not satisfactory.
  • Fig. 3 longitudinal section of the general configuration - pertains to the geometry and the form of the metal and synthetic parts of the projectile (which are illustrated in
  • Fig. 4, 5, 6,7, 8, 9, 10 and 11 to the type of explosive charge (28), to the geometry and the material of the rotating band (27), as well as to the geometry and the type of the spit-back explosive (30).
  • the present invention essentially solves the problems associated with the above.
  • the novelties introduced in this patent ensure the maximum piercing/penetrating capability of the projectile as well the optimization of its fragmentation.
  • Fig. 8 shows a perspective (axis symmetric) projection of the special grooving of the copper cone.
  • main projectile body (illustrated in Fig. 4, 5, 6 and 7), which consists of the body (32) and the internally p re-fragmented steel jacket (33).
  • the rotating band (27), illustrated in Fig. 4 and 5, is manufactured with the use of a plastic injection machine which is electronically programmed and controls parameters and temperatures.
  • the rotating band is made of a polyamide composition with a with a 30% content of glass fibers or a polycarbonate composition with a 10% content of carbon fibers and a 20% content of glass fibers.
  • the materials used for the manufacture of the rotating band, its form (27.1), as well as the geometry of its circumferential fitting (32.1 , 32.2, 32.3) on the cylindrical projectile body (32) (Fig. 4, detail A and sections A-A & B-B) ensure the maximum strength of the band, which in turn gives the round the required spinning velocity so as to ensure a steady flight, even under extreme environmental conditions. All the aforementioned are novelties introduced in the present patent.
  • the explosive charge (28) - illustrated in Fig. 3 - is an explosive composition consisting of the explosive HMX with the addition of plastic binder (Octastit VIII) (HMX + plastic binder), as opposed to the explosive composition, consisting of the explosive RDX and Stearic Acid (Composition A-5) used up to now.
  • the spit-back (30) (the geometry of which is illustrated in Fig. 11), the spherical radius SR 5,0 mm (with a ⁇ 0,125 tolerance), the liner diameter 0 5,8 mm (30.1) as well as the type of explosive (30.2), which is a composition consisting of the explosive RDX, with the addition of Calcium Stearate, Polyisobutylene and Graphite (Composition CH-6 (RDX, Calcium Stearate, Polyisobutylene, Graphite)) as plastic binders, all ensure the detonation of the explosive after the function of the fuze.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Toys (AREA)
  • Prostheses (AREA)

Abstract

La présente invention se rapporte à une grenade, 40mm X 53, à grande vitesse et à double usage (combat et perforation/pénétration) composée d'une douille (22), du projectile (27, 28, 29, 30, 31, 32, 33) et de la fusée (21). Le cône tronqué en cuivre (29), qui est disposé sur la charge explosive (28), avec laquelle le projectile est rempli, porte des rainures (29.1 et 29.2) d'une forme spéciale qui assure la création d'un jet de plasma symétrique, ceci permettant d'obtenir une capacité maximale de perforation/pénétration de la cartouche. La forme et la géométrie des rainures (33.1) du blindage d'acier préfragmenté, distinct (33), qui est enfermé dans un corps en aluminium (32) du projectile, permet une fragmentation maximale de la cartouche. La forme et la matière de la ceinture du projectile (27), ainsi que la géométrie (27.1, 27.2 et 27.3) de ces parties d'ajustement sur les rainures du corps de projectile en aluminium (32) permet l'obtention d'une résistance maximale de la ceinture de projectile, même dans le cas de conditions extérieures les plus extrêmes. Le type d'explosif utilisé dans le projectile permet un déclenchement réussi de la charge perforante (cône tronqué en cuivre (29)), ainsi que la fragmentation du blindage d'acier préfragmenté (33). La géométrie de la charge à jet vers l'arrière (30), la forme du chemisage (30.1) et le type d'explosif (30.2) utilisé dans la charge à jet vers l'arrière permettent un déclenchement efficace de l'explosif du projectile, après l'impact de la fusée, ou pendant le vol du projectile par autodéclenchement.
EP06710189A 2005-03-03 2006-02-15 Grenade, 40mm x 53. grande vitesse, double usage Withdrawn EP1856474A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GR20050100106 2005-03-03
PCT/GR2006/000007 WO2006092637A2 (fr) 2005-03-03 2006-02-15 Grenade, 40mm x 53. grande vitesse, double usage

Publications (1)

Publication Number Publication Date
EP1856474A2 true EP1856474A2 (fr) 2007-11-21

Family

ID=36941529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06710189A Withdrawn EP1856474A2 (fr) 2005-03-03 2006-02-15 Grenade, 40mm x 53. grande vitesse, double usage

Country Status (2)

Country Link
EP (1) EP1856474A2 (fr)
WO (1) WO2006092637A2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7987790B1 (en) 2003-03-18 2011-08-02 Scarr Kimball R Ring airfoil glider expendable cartridge and glider launching method
WO2008099353A1 (fr) * 2007-02-14 2008-08-21 Rippel Effect Weapon Systems (Proprietary) Limited Grenade
US8661983B1 (en) 2007-07-26 2014-03-04 Kimball Rustin Scarr Ring airfoil glider with augmented stability
US8065961B1 (en) 2007-09-18 2011-11-29 Kimball Rustin Scarr Less lethal ammunition
US8511232B2 (en) 2010-06-10 2013-08-20 Kimball Rustin Scarr Multifire less lethal munitions
SE536320C2 (sv) * 2011-04-14 2013-08-20 Bae Systems Bofors Ab Kvarsittande slirande gördel för en projektil
RU2506529C1 (ru) * 2012-11-13 2014-02-10 Открытое акционерное общество "Конструкторское бюро приборостроения" Патрон
US10184327B2 (en) 2015-12-15 2019-01-22 Schlumberger Technology Corporation Downhole tool explosive with thermally conductive material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764092A (en) * 1946-03-08 1956-09-25 Mark F Massey Impact fuze for projectiles

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726224A (en) * 1950-08-23 1973-04-10 Us Army Fluted liners for shaped charges
DE1140108B (de) * 1958-05-24 1962-11-22 Rheinmetall Gmbh Verfahren und Vorrichtung zur Erzeugung eines mit hoher Geschwindigkeit sich vorwaertsbewegenden und mit hoher Winkelgeschwindigkeit rotierenden Massestrahles
GB1236694A (en) * 1969-05-23 1971-06-23 Henry Crossley Packings Ltd Projectile driving bands
US3907947A (en) * 1971-06-24 1975-09-23 Us Navy Method for shaped charge bomblet production
DE2758692A1 (de) * 1977-12-29 1979-07-05 Diehl Gmbh & Co Fuehrungsband
DE3142636C2 (de) * 1981-10-28 1984-06-14 Mauser-Werke Oberndorf Gmbh, 7238 Oberndorf Geschoßkörper mit einem Kunststofführungsband und Verfahren zu seiner Herstellung
US4470353A (en) * 1982-07-26 1984-09-11 Honeywell Inc. Stem booster
US4493264A (en) * 1982-12-27 1985-01-15 The United States Of America As Represented By The Secretary Of The Army Elastic fragmentation sleeve
DE3835888A1 (de) * 1988-10-21 1990-04-26 Rheinmetall Gmbh Granatengeschoss
US5279228A (en) * 1992-04-23 1994-01-18 Defense Technology International, Inc. Shaped charge perforator
AT397867B (de) * 1992-10-27 1994-07-25 Oregon Ets Patentverwertung Geschoss
DE29713229U1 (de) * 1997-07-25 1998-12-03 Diehl Stiftung & Co., 90478 Nürnberg Gefechtskopf
US6393991B1 (en) * 2000-06-13 2002-05-28 General Dynamics Ordnance And Tactical Systems, Inc. K-charge—a multipurpose shaped charge warhead

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764092A (en) * 1946-03-08 1956-09-25 Mark F Massey Impact fuze for projectiles

Also Published As

Publication number Publication date
WO2006092637A3 (fr) 2007-04-05
WO2006092637A2 (fr) 2006-09-08

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