EP0471617B1 - Ceinture d'étanchéité pour projectile flèche - Google Patents

Ceinture d'étanchéité pour projectile flèche Download PDF

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Publication number
EP0471617B1
EP0471617B1 EP91402230A EP91402230A EP0471617B1 EP 0471617 B1 EP0471617 B1 EP 0471617B1 EP 91402230 A EP91402230 A EP 91402230A EP 91402230 A EP91402230 A EP 91402230A EP 0471617 B1 EP0471617 B1 EP 0471617B1
Authority
EP
European Patent Office
Prior art keywords
sabot
projectile
band
seal
area
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
EP91402230A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0471617A1 (fr
Inventor
Marc Berville
Laurent Queille
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.)
Giat Industries SA
Original Assignee
Giat Industries 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 Giat Industries SA filed Critical Giat Industries SA
Publication of EP0471617A1 publication Critical patent/EP0471617A1/fr
Application granted granted Critical
Publication of EP0471617B1 publication Critical patent/EP0471617B1/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
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/067—Sealing aspects in sabots, e.g. sealing between individual segments of the sabots or sealing between the outer surface of the sabot and the inner surface of the barrel
    • 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
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/061—Sabots for long rod fin stabilised kinetic energy projectiles, i.e. multisegment sabots attached midway on the projectile

Definitions

  • the field of the present invention is that of sealing belts for arrow projectiles.
  • An arrow projectile is composed in a known manner of an under-calibrated penetrator secured to a caliber shoe.
  • the sabot is made up of several segments (generally three), which separate and release the indenter at the exit of the barrel of the weapon under the action of aerodynamic forces.
  • this function is fulfilled by the belt, and on the other hand between the different segments of the sabot this function is fulfilled by a elastomeric seal deposited on the shoe and tearing when the segments are separated.
  • Patent DE2537116 describes a sub-calibrated projectile, the shoe of which has a one-piece rear part. The latter achieves both gas tightness and support of the belt. However, the breaking characteristics of such a shoe are difficult to control and such a solution cannot be transposed to arrow munitions having a rear seal made of elastomer.
  • Another advantage is that the means ensuring the mechanical joining by matching the shape of the belt with the material constituting the seal will prevent the seal from being torn off during the course of the projectile in the barrel of the weapon.
  • the recesses may be substantially cylindrical holes whose axis is disposed at a distance from the rear area which is less than their radius.
  • the belt comprises at the rear zone a substantially cylindrical extension which is coaxial with it and the securing means comprise holes made on the extension in a substantially radial direction and regularly distributed over at least one circumference of the extension.
  • Figure 2 is a view of the previous one in direction F.
  • FIG. 4 represents a variant of the previous embodiment.
  • Figures 5A and 5B show the belt alone according to a second embodiment of the invention.
  • FIG. 6 schematically represents an arrow projectile equipped with a belt according to a third embodiment.
  • Figure 8 is a variant of this third embodiment of the belt.
  • an arrow projectile 1 is conventionally constituted by a shoe 2, comprising several segments, generally three, and in which is disposed an indenter 3 of heavy material, for example depleted uranium.
  • the different segments of the sabot are held by a front hoop 4 and a belt 5 which is intended to seal between the barrel of the weapon and the projectile during firing.
  • This seal is for example obtained by injection of an elastomer (such as a polymer vulcanizable at high temperature) on the assembled shoe and placed in a suitable mold.
  • an elastomer such as a polymer vulcanizable at high temperature
  • the seal includes an outer lip 7 slightly over-calibrated (of the order of 121 mm for a caliber of 120 mm), and it comes into contact with the belt 5 at a rear annular zone 8 thereof.
  • the seal 6 could possibly not have a lip but in this case the external diameter of the seal will nevertheless be close to the external diameter of the belt and therefore therefore greater than the caliber of the barrel of the weapon. The external part of the seal will therefore be in contact with the internal surface of the barrel of the weapon.
  • the contact of the seal at the level of the annular zone 8 makes it possible to avoid any leakage of propellant gases between the seal and the belt and also prevents leaks from propagating between the barrel of the weapon and the belt in the event that occurs cracking of the latter.
  • the axis of these holes is arranged at a distance d (FIG. 3B) which is less than the radius of the holes, thus the holes open out at the level of the rear annular zone 8.
  • Such an arrangement makes it possible to obtain recesses which have, from the rear zone 8 at least one narrowed zone (here the opening of the holes on the rear zone 8) followed by an enlarged zone (the diameter of the holes).
  • the material constituting the seal will, during its injection, penetrate into the recesses, and the narrowing of the latter will make it possible to mechanically retain the seal.
  • Figure 4 shows, in uncut external view, an alternative embodiment in which the recesses 12 which are formed on the flange in a radial direction have a trapezoidal section.
  • FIGS. 5A and 5B show a second embodiment of the invention in which the belt 5 carries at the annular zone 8 substantially cylindrical bores 13, and regularly distributed (here nine bores).
  • the axes 14 are inclined so that they intersect the axis of the belt in front of the annular zone 8.
  • This extension carries bores 17, regularly distributed, produced on a circumference of the extension in a substantially radial direction and in the vicinity of the rear annular zone 8.
  • the holes are cylindrical and tangent to the annular zone 8, but any other shape would be possible.
  • the holes thus constitute the means for securing the belt and the seal.
  • the extension 16 may advantageously be used to attach a connecting ring 19 to the projectile which will allow the assembled projectile to be secured with a socket containing the propellant charge (not shown here).
  • a connecting ring 19 is described in patent application FR2620214.
  • first fastening means not shown here which will be, for example, rivets arranged in holes 20 regularly distributed over a circumference of the extension and coming opposite other holes carried by the ring 19.
  • the fixing means will be dimensioned so that the rupture of the second means occurs under the effect of the pressure of the propellant gases, the first means not breaking.
  • the holes 17 will also be dimensioned in such a way that the rupture of the extension 16 occurs if necessary preferably at the level of the holes 20 and of the first means of fixing the ring 19.
  • Holes 24 are distributed over a circumference situated in another radial plane 22.
  • the extension 16 also has a thinned zone 23 at the holes 17 and the holes 24.
  • the thinned zone 23 constitutes an initiation of rupture allowing the separation of the belt 5 from the ring 19.
  • the rupture will occur at the level of the plane 22 in which there are the holes 24 which are not filled with the material of the seal, that is to say behind the holes 17 which will continue to fulfill their function of securing the seal and the belt .
  • an annular groove may be provided making the extension thinner.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)
  • Sealing Material Composition (AREA)
  • Package Frames And Binding Bands (AREA)
  • Adhesive Tapes (AREA)
  • Decoration Of Textiles (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Golf Clubs (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP91402230A 1990-08-13 1991-08-12 Ceinture d'étanchéité pour projectile flèche Expired - Lifetime EP0471617B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9010285 1990-08-13
FR909010285A FR2665761B1 (fr) 1990-08-13 1990-08-13 Ceinture d'etancheite pour projectile fleche.

Publications (2)

Publication Number Publication Date
EP0471617A1 EP0471617A1 (fr) 1992-02-19
EP0471617B1 true EP0471617B1 (fr) 1995-06-07

Family

ID=9399635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402230A Expired - Lifetime EP0471617B1 (fr) 1990-08-13 1991-08-12 Ceinture d'étanchéité pour projectile flèche

Country Status (8)

Country Link
US (1) US5189254A (ja)
EP (1) EP0471617B1 (ja)
JP (1) JPH0658699A (ja)
AT (1) ATE123565T1 (ja)
DE (1) DE69110212T2 (ja)
FR (1) FR2665761B1 (ja)
IL (1) IL99112A (ja)
NO (1) NO174268C (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH684803A5 (de) * 1993-03-05 1994-12-30 Contraves Ag Treibkäfig für ein unterkalibriges, flügelstabilisiertes und mit Drall verschossenes Wuchtgeschoss.
US6279214B1 (en) * 1999-07-14 2001-08-28 Alliant Techsystems Inc. Moisture seal for composite sabot with depleted uranium penetrator
FR2842896B1 (fr) * 2002-07-26 2004-10-22 Giat Ind Sa Ceinture d'etancheite pour un projectile, projectile sous calibre et munition equipes d'une telle ceinture
DE10320194A1 (de) * 2003-05-07 2004-12-02 Rheinmetall W & M Gmbh Abwerfbarer Treibkäfig
DE102008015421A1 (de) * 2008-03-20 2009-09-24 Rheinmetall Waffe Munition Gmbh Verfahren zur Herstellung einer Patrone und Patrone mit einem Treibkäfiggeschoss, hergestellt nach diesem Verfahren
JP5305378B2 (ja) * 2008-08-21 2013-10-02 株式会社Ｉｈｉエアロスペース オブチュレータ及び弾丸
US10502515B2 (en) * 2017-01-17 2019-12-10 Raytheon Company Launch piston brake
US10996037B2 (en) * 2018-09-04 2021-05-04 The United States Of America As Represented By The Secretary Of The Army Obturator for robust and uniform discard

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191217267A (en) * 1912-07-24 1912-12-05 Albert Ammerman Ackerman Improvements in or relating to Projectiles.
BE572090A (ja) * 1957-11-28
US3131938A (en) * 1960-07-08 1964-05-05 William R Barry Packing cartridge assembly
LU57539A1 (ja) * 1968-12-12 1970-06-15
SE400373B (sv) * 1974-08-21 1978-03-20 Bofors Ab Drivspegel for underkalibrig projektil
DE2844870C2 (de) * 1978-10-14 1984-10-18 Rheinmetall GmbH, 4000 Düsseldorf Unterkalibriges Übungsgeschoß
DE3009342A1 (de) * 1980-03-12 1986-06-26 Rheinmetall GmbH, 4000 Düsseldorf Patronierte munition mit einer wenigstens teilverbrennbaren treibladungshuelse
US4444113A (en) * 1981-04-06 1984-04-24 The United States Of America As Represented By The Secretary Of The Army High-pressure self-sealing obturator in sabot discard projectile
US4552071A (en) * 1982-06-15 1985-11-12 United Technologies Corporation Two-piece despin obturator
DE3314749A1 (de) * 1983-04-23 1984-10-25 L'Etat Français représenté par le Délégué Général pour l'Armement, Paris Segmentierter treibkaefig
DE3332675C2 (de) * 1983-09-10 1986-10-02 Rheinmetall GmbH, 4000 Düsseldorf Heckseitige Dichtscheibe aus elastischem Material für einen Treibkäfig
DE3334022A1 (de) * 1983-09-21 1985-04-04 Mauser-Werke Oberndorf Gmbh, 7238 Oberndorf Geschosskoerper mit kunststoffuehrungsband
AT388452B (de) * 1984-10-24 1989-06-26 Voest Alpine Ag Unterkalibriges wuchtgeschoss
FR2606869B1 (fr) * 1986-11-19 1990-10-05 France Etat Armement Ceinture derapante pour projectile de tout calibre
NO163425C (no) * 1987-04-30 1990-05-23 Oerlikon Buehrle Ag Utformning av et oenskebruddsted ved hekkdelen av et drivspeil for et drivspeilprosjektil.
USH405H (en) * 1987-08-24 1988-01-05 The United States Of America As Represented By The Secretary Of The Army Rocket/launcher interface
FR2620214B1 (fr) * 1987-09-09 1990-04-13 France Etat Armement Bague de liaison entre un projectile et une douille

Also Published As

Publication number Publication date
ATE123565T1 (de) 1995-06-15
NO913133L (no) 1992-02-14
FR2665761A1 (fr) 1992-02-14
DE69110212T2 (de) 1995-11-09
FR2665761B1 (fr) 1994-09-16
IL99112A0 (en) 1992-07-15
EP0471617A1 (fr) 1992-02-19
NO913133D0 (no) 1991-08-12
DE69110212D1 (de) 1995-07-13
NO174268C (no) 1994-04-06
JPH0658699A (ja) 1994-03-04
NO174268B (no) 1993-12-27
IL99112A (en) 1994-02-27
US5189254A (en) 1993-02-23

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