EP0481874A1 - Vorrichtung zum Befestigen von am Drallgeschoss angebrachten Granaten - Google Patents

Vorrichtung zum Befestigen von am Drallgeschoss angebrachten Granaten Download PDF

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Publication number
EP0481874A1
EP0481874A1 EP91402747A EP91402747A EP0481874A1 EP 0481874 A1 EP0481874 A1 EP 0481874A1 EP 91402747 A EP91402747 A EP 91402747A EP 91402747 A EP91402747 A EP 91402747A EP 0481874 A1 EP0481874 A1 EP 0481874A1
Authority
EP
European Patent Office
Prior art keywords
projectile
submunitions
grenades
base
longitudinal axis
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Withdrawn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
EP91402747A
Other languages
English (en)
French (fr)
Inventor
Jean-Marie Poussard
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.)
Thomson Brandt Armements SA
Original Assignee
Thomson Brandt Armements 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 Thomson Brandt Armements SA filed Critical Thomson Brandt Armements SA
Publication of EP0481874A1 publication Critical patent/EP0481874A1/de
Withdrawn legal-status Critical Current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
    • 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
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
    • F42B12/58—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles

Definitions

  • the present invention relates to a projectile transporting submunitions, driven in a rotational movement around its longitudinal axis.
  • a particular field of application of this invention relates to grenade dispersing projectiles with explosive charges.
  • Such projectiles are fired from a rifled mortar allowing the rotation of the body of the projectiles at the time of launch. The trajectories of these projectiles are therefore more stable.
  • these projectiles generally include a detachable base to allow the ejection of grenades. The ejection principle is then based on the use of a piston which exerts on the base, sufficient force for the base to detach from the body of the projectile and for the grenades to exit through the opening thus created; the separation of the grenades then results from their different tangential speeds.
  • grenades must follow, after ejection, a determined trajectory which gives them on the one hand, a good angle of impact on the ground, necessary for firing their explosive charge, and on the other hand, a homogeneous distribution. It is therefore very desirable to eliminate as much as possible the disturbing elements on the trajectories of the grenades during their ejection, these disturbing elements being able for example, for a given grenade, other grenades or elements of setting in the projectile.
  • the devices existing at present do not meet this requirement, for reasons which we will detail later.
  • the object of the present invention is to overcome the aforementioned drawbacks by proposing a projectile which contains a simple means of securing grenades relative to the movement of the projectile while eliminating the disturbing elements mentioned.
  • FIG. 1 illustrates a known system for securing submunitions, for example grenades, inside a projectile.
  • the projectile has a body 5 inside which the grenades 1, 6 are placed.
  • the grenades situated at the inner periphery of the body 5 are wedged by means of a circular rod 2 comprising as many external wedging means 3 as 'there are grenades.
  • the circular rod 2 is itself keyed in a longitudinal groove 4 relative to the body 5 of the projectile, so as to block all of the grenades 1 in rotation.
  • a central grenade 6 is held by the peripheral grenades 1.
  • each peripheral grenade 1 is in contact with three other grenades and the setting means, and that the central grenade 6 is tangent to the six peripheral grenades. These contacts, as well as the circular rod 2, will favor disturbances on the trajectories of grenades during their ejection. Finally, the presence of the longitudinal groove 4 complicates the production of the longitudinal seal.
  • FIG. 2 is a cross section of a projectile transporting submunitions, for example grenades, according to a possible embodiment of the invention:
  • the body 7 of the projectile comprises, according to the invention, a central part 8 called an edge, integral with the body 7 of the projectile by means which we will describe later.
  • the edge 8 substantially follows the shape of the grenades 9 which surround it, thereby causing them to rotate the body 7 of the projectile.
  • the cross shape of the edge 8 prevents the grenades 9 of the same flat section from being in contact with each other.
  • the edge 8 also ensures, with the body 7 of the projectile, the maintenance of the grenades, without requiring other wedging means. To carry out the ejection of grenades according to the same principle as previously, it suffices to push the grenade-edge assembly out of the body of the projectile by a longitudinal translation. Each grenade 9, under the action of centrifugal force, is then ejected, and finds no disturbing element, such as for example other grenades or wedging means, on its trajectory.
  • FIG. 3 shows a longitudinal section, along the axis XX ′ of FIG. 2, of the projectile according to a possible embodiment of the invention: the projectile carries several grenades 9, placed longitudinally in columns relative to the body 7 of the projectile , around the central edge 8.
  • the edge 8 and the body 7 of the projectile are joined together by means of a detachable base 10 fixed, by means of pins 11 for example, on the body 7 of the projectile.
  • the part 12 of the base 10 has a shape which allows the wedging of the edge 8, thus blocking the edge 8 in rotation. It can be noted that the sealing is carried out very simply, using, for example, an O-ring 13.
  • the grenades have a very particular shape, as shown in section for the grenade 14, it is possible to embed the conical end of a grenade in the part 16 of complementary shape of the following grenade.
  • the last layer of grenades 14 is itself embedded in the base 10 of the projectile, in order to gain bulk.
  • the grenades of the last layer 14 are maintained, for example, by a wall 17.
  • the projectile comprises an ejection system according to a possible embodiment: a rocket 18 allows the firing of an ejection charge 19 contained in a gas generator 20.
  • the gases resulting from the combustion create a overpressure in a chamber 21 one of the walls of which constitutes a piston 22.
  • the piston 22 exerts on the central edge 8 sufficient longitudinal force to detach the base 10 from the body 7 of the projectile. Grenades 9 are then released, and dissociate from each other due to their different tangential speeds.
  • the projectile also includes a spring 23 placed between the end of the central edge 8 and the base 10, and held longitudinally, for example using walls 24.
  • the longitudinal action of the spring 23 facilitates the ejection of the grenades 14 embedded in the base 10.
  • the projectile according to the invention has been described for a very specific principle of ejection of grenades. It should be noted that the system for securing grenades with the projectile in its rotational movement is in no way limited to this principle of ejection.
  • the securing system according to the invention while also ensuring the maintenance of the submunitions, is perfectly suited to projectiles having high rotational speeds, such as for example projectiles fired from a mortar, without requiring other wedging means which should be very resistant

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
EP91402747A 1990-10-19 1991-10-15 Vorrichtung zum Befestigen von am Drallgeschoss angebrachten Granaten Withdrawn EP0481874A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9012954 1990-10-19
FR9012954A FR2668255B1 (fr) 1990-10-19 1990-10-19 Dispositif de solidarisation de grenades a l'interieur d'un projectile en rotation autour de son axe longitudinal.

Publications (1)

Publication Number Publication Date
EP0481874A1 true EP0481874A1 (de) 1992-04-22

Family

ID=9401392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402747A Withdrawn EP0481874A1 (de) 1990-10-19 1991-10-15 Vorrichtung zum Befestigen von am Drallgeschoss angebrachten Granaten

Country Status (3)

Country Link
EP (1) EP0481874A1 (de)
CA (1) CA2053567A1 (de)
FR (1) FR2668255B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5789695A (en) * 1995-05-15 1998-08-04 Scherer; Werner Method and apparatus for disassembling and reassembling projectiles
US6874425B1 (en) 2001-05-18 2005-04-05 Day & Zimmermann, Inc. Projectile carrying sub-munitions
EP1798514A1 (de) * 2005-12-14 2007-06-20 Israel Military Industries Ltd. Verfahren zur Konvertierug eines Geschoss mit Sekundärgeschossen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1567518A (de) * 1967-05-23 1969-04-08
US4446793A (en) * 1981-12-28 1984-05-08 Gibbs Robert L Disk deployment of expendables
EP0233833A1 (de) * 1986-01-31 1987-08-26 Loral Corporation Verfahren und Vorrichtung zum Verteilen unter Drallausnutzung
EP0346214A1 (de) * 1988-06-10 1989-12-13 Thomson-Brandt Armements Verfahren und Vorrichtung zum Auswerfen von Submunition

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1567518A (de) * 1967-05-23 1969-04-08
US4446793A (en) * 1981-12-28 1984-05-08 Gibbs Robert L Disk deployment of expendables
EP0233833A1 (de) * 1986-01-31 1987-08-26 Loral Corporation Verfahren und Vorrichtung zum Verteilen unter Drallausnutzung
EP0346214A1 (de) * 1988-06-10 1989-12-13 Thomson-Brandt Armements Verfahren und Vorrichtung zum Auswerfen von Submunition

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5789695A (en) * 1995-05-15 1998-08-04 Scherer; Werner Method and apparatus for disassembling and reassembling projectiles
US6874425B1 (en) 2001-05-18 2005-04-05 Day & Zimmermann, Inc. Projectile carrying sub-munitions
EP1798514A1 (de) * 2005-12-14 2007-06-20 Israel Military Industries Ltd. Verfahren zur Konvertierug eines Geschoss mit Sekundärgeschossen
US7490555B2 (en) * 2005-12-14 2009-02-17 Israel Military Industry Ltd. Method of converting a cluster bomb into a unitary bomb

Also Published As

Publication number Publication date
FR2668255B1 (fr) 1994-08-26
FR2668255A1 (fr) 1992-04-24
CA2053567A1 (fr) 1992-04-20

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