EP1023573B1 - Treibkäfig mit verbesserter gasabdichtung für submunitionskörper - Google Patents

Treibkäfig mit verbesserter gasabdichtung für submunitionskörper Download PDF

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Publication number
EP1023573B1
EP1023573B1 EP98947606A EP98947606A EP1023573B1 EP 1023573 B1 EP1023573 B1 EP 1023573B1 EP 98947606 A EP98947606 A EP 98947606A EP 98947606 A EP98947606 A EP 98947606A EP 1023573 B1 EP1023573 B1 EP 1023573B1
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EP
European Patent Office
Prior art keywords
launcher
seal
launcher according
face
wall
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
EP98947606A
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English (en)
French (fr)
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EP1023573A1 (de
Inventor
Jean-Claude Sauvestre
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Individual
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Individual
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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
    • F42B14/061—Sabots for long rod fin stabilised kinetic energy projectiles, i.e. multisegment sabots attached midway on the projectile
    • 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

Definitions

  • the present invention relates to ammunition for weapons small, medium and large caliber, and more particularly a improved launcher with improved sealing, for ammunition type comprising an undersized ball and a launcher, in particular for hunting or training weapons.
  • Launch techniques commonly used today use a launcher usually consisting of two or several elements surrounding the sub-projectile.
  • the elements of the launcher assembled together in contiguous planes by a locking system, can be made of alloys metallic or plastic.
  • the aerodynamic forces exerted on the projectile at the exit of the weapon cause the separation of the elements of the launcher which, after separation, each follow a trajectory clean and fall at varying distances from the weapon.
  • patent FR-A-2,555,728 describes ammunition for hunting weapon comprising an under-calibrated projectile stabilized by empennage, including a tapered ball dense alloy associated with a plastic launcher.
  • patents FR-A-2,599,828 and FR-A-2,606,500 describe hunting bullets of the type comprising a sub-projectile and a launcher made of several detachable elements, the characteristics of which are improved.
  • patent FR-A-2,599,828 describes a ball with great stability on trajectory, and providing so good shooting accuracy, but destabilizing beyond a certain distance.
  • FR-A-2,606,500 relates to ammunition providing a high initial speed and limiting the violence of the recoil shock, constituted by a undersized bullet and a launcher of the caliber of the weapon, comprising an open external annular chamber, separated from the propellant charge by a partition likely to rupture under the pressure of the gases generated by the combustion of the charge.
  • the present invention specifically relates to a launcher with improved sealing for ammunition of the type comprising a launcher associated with a sub-projectile on which it can adapt, comprising one or more elements and at least one peripheral seal.
  • the invention also relates to a launcher for ammunition of the type comprising a launcher associated with a sub-projectile to which it can adapt, providing both improved seal against combustion gases and reduction of the recoil shock of the weapon.
  • the invention also relates to a complete bullet constituted by an under-calibrated projectile associated with a launcher, and comprising an optimized seal.
  • the launcher according to the present invention is distinguished by what it includes at least one seal around continuously the external face and the internal face of each element, each joint preferably consisting of a single piece.
  • each element of the launcher is crossed by one or several perforations ensuring the joining of the joint, and the launcher of the invention preferably comprises at least two separable elements.
  • the seal covers at least in part not only the outer face but also the face internal and singing of the junction plane of each element of launcher, and it has a thickness such that it exceeds beyond the outer surface, the inner surface, and the junction plane, from a distance between 0 and 1 mm, and preferably between 0.1 and 0.5 mm in the case of hunting ammunition.
  • the seal can be formed on each element of the launcher by molding in a flexible material chosen from rubbers natural or artificial, for example of vulcanizable rubber or in thermoplastic elastomer, preferably having excellent adhesion to the material constituting the launcher, and where appropriate containing usual charges intended to improve its mechanical properties, for example an anti-ultraviolet agent improving resistance to aging agent or a lubricating agent intended to facilitate sliding against the wall of the barrel.
  • the hardness of rubber used is chosen according to conditions of use, and it is generally between 20 and 120 (Shore hardness), and preferably between 50 and 90.
  • each element is crossed by one or more perforations letting the material pass during the molding of the joint.
  • the seal on the rear of the element launcher preferably includes an annular sealing cap the space between the launcher and the internal wall of the socket, delimiting an external annular chamber in the immediate vicinity of the load.
  • the launcher When the launcher has only one joint, it is preferably placed on the front of each element. In Indeed, the tests carried out with ammunition conforming to the invention have shown that this arrangement facilitates Cartoning operations.
  • front part within the meaning of the invention means the area consisting approximately of half of the launcher is finding forward of the projectile.
  • the seal conforms to the present invention is preferably placed in this part front, and more preferably at a distance from the front edge of the launcher representing less than 30% of the length of the launcher.
  • the part of the launcher located in front of the joint can be independent on the other side.
  • this then consists of two cylindrical elements arranged longitudinally on the same axis and separated by the seal attached to the edge of one of the two elements.
  • the seal is disposed at the front end of the launcher, of which it envelops the front face, this preferably comprising notches transversal facilitating the attachment of the joint on the launcher and the assembly of the elements when the launcher is in two or more elements.
  • the improved waterproof launcher in accordance with this invention can be made of metal or a metal alloy, for example aluminum alloy, or plastic manufactured by molding or injection, for example in polyamide.
  • the invention also relates to a method for manufacture a launcher with improved sealing for ammunition of the type comprising a launcher associated with a sub-projectile, comprising one or more elements each comprising a seal integrated soft seal.
  • thermoplastic elastomer or vulcanizable rubber directly on each launcher element, on part of the launcher wall crossed by perforations.
  • the device according to the present invention is applicable in all ammunition, small, medium or large caliber, of the type comprising an under-calibrated projectile, for example a undersized ball, and a launcher made up of one or more separable elements, in the field of hunting weapons, of sport or training, and preferably in that of weapons of hunting.
  • the present invention provides the advantage of reducing the standard deviation pressure and speed, and therefore decrease the dispersion of the shot. In addition, there is no disturbance of the trajectory of the sub-projectile.
  • Figure 1 a half-section view of a complete bale, including an undersized bullet and a waterproof launcher improved according to the invention.
  • Figure 2 a half-section view showing a second embodiment of the launcher according to the invention, comprising a seal at the rear.
  • Figure 3 a half-section view showing another shape of the launcher according to the invention, comprising a gasket in front.
  • Figure 4 a half-section view showing another shape of the launcher according to the invention, comprising two seals.
  • Figure 5a a front view of a variant launcher of the invention comprising a seal in the front part, corresponding to the embodiment of Figure 5b.
  • Figure 5b a partial sectional view along A-A of Figure 5a launcher.
  • Figure 1 shows, in half-view, a cartridge comprising a launcher element (1) of substantially shaped semi-cylindrical, a socket (2), a primer (3) and a charge propellant (4).
  • the shape of the inner wall of the launcher (1) is intended to fit in a known manner on the body of the sub-calibrated bullet (5) of the arrow-bullet type.
  • the inner face of the launcher has teeth (6) cooperating with grooves (7) formed on the body of the ball (5).
  • the launcher has annular grooves on its external face of substantially semi-circular section (8 and 9) forming decompression grooves, and limiting the surface of friction in the barrel of the weapon.
  • the front part (10) of the launcher has a surface internal conical (11) diameter widening from the rear forward, to facilitate separation of the element from launcher under the effect of aerodynamic forces exerted at the out of the barrel.
  • the rear part (12) has an annular skirt (13) as well as a groove (14), at the connection with the body of the launcher element.
  • the skirt (13) is crossed by two series of perforations (15) arranged in a transverse plane, each series can include for example 3 or 4 perforations in the wall of the launcher.
  • the annular skirt (13) is truncated at both ends so that its cross-section is not entirely semicircular but covers an arc of circle of about 170 °; thus the two launcher elements (1) set up are not joined by the edges of their skirts respective annulars (13) but a space is provided between them, in which the seal takes place as shown below.
  • the seal (16) envelops the entire annular skirt (13) and the throat (14), and natural or artificial rubber which constitutes it fills the perforations (15) passing through Wall. It protrudes slightly beyond the surface external of the launcher (1), above the groove (14) to ensure sealing on the one hand with the wall of the socket, preventing any infiltration of gases generated by combustion propellant charge (4), on the other hand with the wall internal of the tube, after firing.
  • the seal (16) also protrudes slightly beyond the junction plane of the elements of launcher, so that the two launcher elements one once assembled, be joined by their seals (16) which are strongly compressed against each other.
  • the overshoot beyond the outer surface and beyond of the junction plane is of the order of 0.3 to 0.5 mm in the case hunting ammunition.
  • the embodiment shown in Figure 2 is a variant of the launcher in Figure 1 where the seal (17) is formed in an annular groove (18) whose bottom is pierced by openings (19) passing through the entire wall of the element (1) of the launcher. As shown in Figure 2, the seal (17) completely envelops the element launcher (1) and has an edge (17a) projecting in the plane of junction of the two launcher elements.
  • each launcher element (1) has a seal (20) placed in a groove (21) provided in the part front of the launcher. This groove is pierced by a series of perforations (22) passing through the wall of the launcher, ensuring the formation of the seal also on the internal wall of the launcher.
  • the seal (21) has a slightly flattened shape ensuring good sealing contact with the wall of the socket and the inner wall of the tube, in the launch phase.
  • the improved waterproof launcher variant shown in Figure 4 includes two seals, one (16) identical to that of Figure 1, arranged on the part rear of the element (1) of the launcher, the other (20) formed by overmolding in the annular groove (21) located in the front part of the launcher.
  • the bottom of this groove (21) has a series of perforations (22) crossing the thickness of the wall, and facilitating overmolding thermoplastic elastomer or vulcanizable rubber which fills the entire annular groove (21) over its entire length, enters the perforations (22) and envelops the launcher in the plane of this gorge.
  • a cover (23) can be provided on the seal (16).
  • This cover is preferably formed by molding the seal in thermoplastic elastomer or vulcanizable rubber and an integral part thereof. Her height is such that the peripheral edge of the cover (23) either in contact with the internal wall of the socket (2) when the bullet is placed in the cartridge.
  • this cover (23) defines with the seal (16) and the wall of the socket an external annular chamber which is in the vicinity immediate propellant charge.
  • the variant embodiment shown in Figures 5a and 5b comprises the same launcher element (1) as on the Previous figures, but the seal (24) is fixed at the front end of the launcher (1), on its front part that it envelops by partially covering it.
  • the front part of the element (1) comprises an annular rib (25) crossed by several perforations, as well as three transverse notches (26, 27, 28), intended for reinforce the attachment of the rubber seal (24) natural or artificial on the element (1) of the launcher.
  • the seal (24) completely covers the three notches but leaves the enlarged front face of the rib (25) visible.
  • a notch (26) is provided in the central part of the front part of the element (1) and the other two notches (27, 28) are provided at each of the two ends.
  • the seal (24) completely fills the volume of the notches (26, 27, 28) and protrudes slightly beyond the exterior and interior surfaces of element (1) and in the junction plane of two elements (1) to ensure a good seal at the same time in the cartridge case, and in the barrel after firing.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Gasket Seals (AREA)
  • Manipulator (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Fishing Rods (AREA)
  • Pens And Brushes (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Emergency Lowering Means (AREA)

Claims (14)

  1. Treibkäfig für Munitionen des Typs, die einen Treibkäfig (1) umfassen, der einem Unterkalibergeschoss (5) zugeordnet ist, an das er sich anpassen kann, enthaltend ein oder mehrere voneinander trennbare Elemente und zumindest eine Dichtung, dadurch gekennzeichnet, dass zumindest eine Dichtung (16, 17, 20) vorgesehen ist, die die Außenfläche und die Innenfläche eines jeden Elements gurtartig umschließt.
  2. Treibkäfig nach Anspruch 1, dadurch gekennzeichnet, dass die Wand eines jeden Elements von einer oder mehreren Perforationen (15, 19, 22) durchsetzt ist, die das einstückige Anbinden der Dichtung gewährleisten.
  3. Treibkäfig nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass er zumindest zwei voneinander trennbare Elemente umfasst.
  4. Treibkäfig nach Anspruch 3, dadurch gekennzeichnet, dass die Dichtung zumindest teilweise die Innenfläche, die Außenfläche und die Kante der Zusammenfügungsebene eines jeden Elements des Treibkäfigs bedeckt.
  5. Treibkäfig nach Anspruch 4, dadurch gekennzeichnet, dass die Dichtung über die Außenfläche, die Innenfläche und die Zusammenfügungsebene um eine Distanz hinausgeht, die zwischen 0 und 1 mm liegt.
  6. Treibkäfig nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Dichtung durch Formung aus einem elastischen Material gebildet ist, das aus Natur- oder Kunstkautschuken ausgewählt ist.
  7. Treibkäfig nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die auf dem hinteren Abschnitt des Treibkäfigelements angeordnete Dichtung (16) ein quergerichtetes Innenhütchen (23) umfasst, das den Raum zwischen dem Treibkäfig und der Innenwand der Hülse verschließt, wodurch eine ringförmige Außenkammer in unmittelbarer Nachbarschaft der Ladung begrenzt wird.
  8. Treibkäfig nach einem der Ansprüche 1 bis 6. dadurch gekennzeichnet, dass jedes Element eine Dichtung (20) umfasst, die auf seinem vorderen Abschnitt angeordnet ist.
  9. Treibkäfig nach Anspruch 8, dadurch gekennzeichnet, dass die Dichtung (24) die Vorderseite des Treibkäfigs umhüllt.
  10. Treibkäfig nach Anspruch 9, dadurch gekennzeichnet, dass er auf seiner Vorderfläche quergerichtete bogenförmige Aussparungen (26, 27, 28) aufweist.
  11. Treibkäfig nach Anspruch 8, dadurch gekennzeichnet, dass er aus einem einzigen Element besteht, das eine Dichtung im vorderen Abschnitt umfasst.
  12. Treibkäfig nach Anspruch 3, dadurch gekennzeichnet, dass er aus zwei identischen Elementen besteht, die symmetrisch in Bezug auf die Längsachse angeordnet sind.
  13. Treibkäfig nach Anspruch 6, dadurch gekennzeichnet, dass die Dichtung aus thermoplastischem Elastomer oder aus vulkanisierbarem Kautschuk besteht und dass der Treibkäfig aus Polyamid besteht.
  14. Verfahren zur Herstellung eines Treibkäfigs für Munitionen nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass ein Aufformen durch Aufspritzen von thermoplastischem Elastomer oder vulkanisierbarem Kautschuk direkt auf jedes Element des Treibkäfigs auf einem Teil der Wand des Treibkäfigs durchgeführt wird, der von den Perforationen durchsetzt ist.
EP98947606A 1997-10-13 1998-10-06 Treibkäfig mit verbesserter gasabdichtung für submunitionskörper Expired - Lifetime EP1023573B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9712754A FR2769700B1 (fr) 1997-10-13 1997-10-13 Lanceur a etancheite amelioree pour munitions du type comportant un lanceur associe a un sous-projectile
FR9712754 1997-10-13
PCT/FR1998/002127 WO1999019685A1 (fr) 1997-10-13 1998-10-06 Lanceur a etancheite amelioree pour munitions du type comportant un lanceur associe a un sous-projectile

Publications (2)

Publication Number Publication Date
EP1023573A1 EP1023573A1 (de) 2000-08-02
EP1023573B1 true EP1023573B1 (de) 2002-01-02

Family

ID=9512143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98947606A Expired - Lifetime EP1023573B1 (de) 1997-10-13 1998-10-06 Treibkäfig mit verbesserter gasabdichtung für submunitionskörper

Country Status (9)

Country Link
EP (1) EP1023573B1 (de)
AT (1) ATE211539T1 (de)
AU (1) AU9446198A (de)
CA (1) CA2305549C (de)
DE (1) DE69803401T2 (de)
ES (1) ES2169927T3 (de)
FR (1) FR2769700B1 (de)
PT (1) PT1023573E (de)
WO (1) WO1999019685A1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2672814A (en) * 1949-10-07 1954-03-23 Schlumberger Well Surv Corp Fluid sealing and burr elimination projectile for perforator guns
US4187783A (en) * 1978-03-13 1980-02-12 The United States Of America As Represented By The Secretary Of The Army Discarding sabot munition
FR2555728B1 (fr) 1983-11-29 1987-03-20 Sauvestre Jean Claude Munition pour arme de chasse
DE3617415C2 (de) * 1986-05-23 1995-09-07 Mauser Werke Oberndorf Unterkalibriges Treibspiegelgeschoß
FR2599828B1 (fr) 1986-06-05 1990-08-24 Sauvestre Jean Claude Munition de petit ou moyen calibre a efficacite amelioree et portee limitee, en particulier pour la chasse
FR2606500B1 (fr) 1986-06-05 1990-07-06 Sauvestre Jean Claude Munition de chasse a volume de combustion augmente
FR2662241B1 (fr) * 1990-05-19 1994-09-23 Sauvestre Jean Claude Systeme de lancement tandem a etancheite centrale.
FR2708730B1 (fr) * 1993-08-06 1995-10-20 Sauvestre Jean Claude Lanceur à séparation contrôlée d'éléments pour munitions.

Also Published As

Publication number Publication date
DE69803401D1 (de) 2002-02-28
CA2305549C (fr) 2007-06-05
CA2305549A1 (fr) 1999-04-22
WO1999019685A1 (fr) 1999-04-22
EP1023573A1 (de) 2000-08-02
FR2769700A1 (fr) 1999-04-16
ATE211539T1 (de) 2002-01-15
DE69803401T2 (de) 2002-08-01
FR2769700B1 (fr) 1999-12-24
ES2169927T3 (es) 2002-07-16
PT1023573E (pt) 2002-06-28
AU9446198A (en) 1999-05-03

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