WO2009043406A2 - Cartouche et canons améliorés - Google Patents

Cartouche et canons améliorés Download PDF

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Publication number
WO2009043406A2
WO2009043406A2 PCT/EP2008/006261 EP2008006261W WO2009043406A2 WO 2009043406 A2 WO2009043406 A2 WO 2009043406A2 EP 2008006261 W EP2008006261 W EP 2008006261W WO 2009043406 A2 WO2009043406 A2 WO 2009043406A2
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
cartridge
barrel
sheath
phase
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.)
Ceased
Application number
PCT/EP2008/006261
Other languages
English (en)
Other versions
WO2009043406A3 (fr
Inventor
Noemi Exposito Morales
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2009043406A2 publication Critical patent/WO2009043406A2/fr
Publication of WO2009043406A3 publication Critical patent/WO2009043406A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/28—Gas-expansion chambers; Barrels provided with gas-relieving ports
    • 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
    • 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
    • F42B5/16—Cartridges, i.e. cases with charge and missile characterised by composition or physical dimensions or form of propellant charge, with or without projectile, or powder

Definitions

  • the present invention intends to achieve ballistic values superior to those achieved by conventional barrels, whether they are smooth or striated, with the advantage that is provided by the rotation of the projectile using a smooth barrel in its helicoidal groove version and a slightly sub-calibrated projectile.
  • the firing mechanism existing until the first third of the 19 th century consisted of a hammer with a flint fragment at its end, which upon the trigger of the weapon being actuated struck a steel disc, lighting a small amount of gunpowder placed in a hole at the end of the barrel, which thus transmitted the deflagration to the gunpowder which drove the bullet inside the barrel of the weapon.
  • the bore of the rifle (internal surface of the barrel) was smooth and the lead bullet spherical, which facilitated its deformation and deflection during the firing, making it almost impossible to hit an enemy at more than 100 m.
  • the poor quality of the gunpowder used made the stray bullets practically inoffensive at more than 500 m.
  • the threaded bore consists of engraving a series of grooves along the internal surface of the barrel, which turn in a certain direction around the axis of the barrel, and at a certain distance (groove passage).
  • the grooves cause the bullet to rotate (gyroscope effect), and in this way keep a stable trajectory during their advancement, as they maintain their axis parallel with the line of flight. As a consequence, it increases the reach and the accuracy of the weapon.
  • the next great innovation was the appearance of the cartridge, which contains in a single element, the projection loading thereof and the fulminate which initiates the firing, which until then came separate or partially wrapped in the paper that was used as a plug for the charge.
  • the first cartridges appeared around the decade of 1840, and tended to be wrapped in cardboard or waxed cloth and sometimes did not include the primer which was placed in a similar manner to the traditional percussion weapons tearing the cartridge at its rear part upon inserting the cartridge and locking the weapon.
  • the loading of the weapon was simplified and was extremely sped up with the use of the cartridge.
  • the sheath which serves as a bearer of the projection charge (gunpowder) and is the part which has the rest of the elements which compose the cartridge
  • initiating capsule which is the part of the cartridge where the initiating substance in charge of beginning the ignition is housed
  • gunpowder which is the propelling charge of the cartridge, whose mission is to drive the bullet
  • bullet which is the projectile fired.
  • the plug which on the one hand takes maximum advantage of the gases produced in the combustion of the gunpowder thanks to a perfect internal sealing of the cartridge at the moment of firing and, on the other, contains and protects the pellets in their trajectory inside the barrel, preventing that they deform due to brushing against the walls.
  • barrels With regard to the types of barrels, there is a distinction made between: smooth barrels, more appropriate for cartridges with pellets (shotguns), and threaded barrels, which have spiral grooves inside the barrel which make the bullet turn on its axis.
  • the fulminate upon being struck, detonates violently. This explosion causes a blaze which in contact with the gunpowder initiates a chemical reaction which turns it into gas. Due to this reaction, an increase in volume is produced, which translates into pressure which drives the bullet.
  • the present invention proposes a sheathed cartridge, and which uses two separate propellant charges, which cause the explosion to be produced in two phases, the first of them at the centre of a gas expansion chamber, and the second when the projectile has already advanced considerably down the barrel, there not existing in the current state of the art any of these characteristics.
  • the present invention by making use of explosive propellants in the two phases mentioned, instantaneously releases a large quantity of gas, which through effect of the overpressure can even become plasma.
  • the explosion of the first of the two phases which supported by the cartridge is produced when the detonation of the initiating capsule transmits its push through the cannula of the sheath to the first phase assembly + projectile, driving it and moving it towards the centre of the open gas expansion chamber, until situating itself at the beginning of the set of crests which are between the grooves, at the same time that it separates from the neck of the sheath.
  • the innovation in the design of the barrel consists in the use of a gas expansion chamber (open area of greater calibre that the chamber or the tube) and of a series of rectilinear longitudinal grooves or slightly helicoidal which, starting at the bottom of the gas expansion chamber walls extend in smooth decline along the barrel, crests emerging from between them which, in turn, make up the initial structure of the calibration of the bore.
  • Pushing force is produced because the explosion takes place right behind the projectile, and therefore takes advantage of the part of the explosive push in the direction of the vector of the barrel, such as the push reflected by certain areas of the chamber walls.
  • Pulling force the grooves, which serve as a relief in the explosion, are relatively narrow passages which due to the Venture Effect create jets of high pressure which pull the projectile by its sides, additionally transferring to it a rotational movement, if helicoidal grooves are used, which will give it stability, both in its path down the barrel and in flight.
  • Suction force the gases, which have been absorbed by the projectile at a higher velocity than this (and which turn like a whirlwind if helicoidal grooves are used), create a pressure drop zone in front of it. This gas (or plasma) flow is furthermore able to extend, far in front of the fire mouth, the impact of the projectile with the atmosphere.
  • the smooth grooves will be of the length necessary to end up speeding up the projectile with the charge of the second phase of the cartridge, and will be of the same calibre from the area of the grooves to the fire mouth, being able to add any type of flash hider, muzzle brake or other type of flash or recoil attenuator.
  • Figure 1. Shows a schematic view of the barrel with the cartridge inserted in the chamber thereof.
  • Figure 2. Shows a quartering of the cartridge.
  • Figure 3. Shows the phases of the process. PREFERRED EMBODIMENT OF THE INVENTION
  • the present invention consists of a barrel and an improved cartridge, so that the explosion is produced in two phases, thereby achieving ballistic values greater than those achieved by conventional barrels.
  • the barrel is made up of a smooth bore (1) and a chamber (2) to house in its interior the cartridge (3).
  • the gas expansion chamber (4) made up of two differentiated areas: the first open area (5) and of greater calibre than the smooth tube, and a second area (6) formed by a plurality of longitudinal helicoidal or rectilinear grooves, whose flows pull, suction and provide rotational movement to the projectile about its own axis, giving it stability, in the event that they are helicoidal.
  • the curved bottom of said grooves stems from the curvature of the lateral end of the open area (5) and the crests form part of the calibration of the smooth tube.
  • the chamber (2) houses a cartridge (3), with the first phase protruding until the centre of the expansion chamber, and with the projectile inserted therein, so that this is featured inside the bore formed by the set of crests, in order to focus the explosion of the first phase in the gas expansion chamber (4), and that said first explosion phase does not run into and has a space until the crests of the grooves (6) allowing it to have an advanced explosion produced by the detonation.
  • the cartridge (3) is composed of an exterior sheath which has an initiating capsule (7) housed in its rear end.
  • an initiating capsule (7) housed in its rear end.
  • the charges, both of quick, compact explosiveness the charge of the second phase (8), in an inverted cone shape at the end facing the first phase, and the charge of the first phase (9), doubly threaded at one end of the cannula and at the neck of the sheath, and at the other end threaded in turn the projectile (10), which will preferably be of the sabot type, with the advantage of minimising the friction and increasing the surface exposed to the explosions, without increasing the mass of the projectile too much.
  • a metallic cannula (11 ) transmits the detonation of the initiating capsule (7) until the explosive of the first phase (9).
  • the projectile (10) After the explosion of the first phase (9), the projectile (10) abruptly accelerates due to that push, pull and suction, at the same time that it begins to turn in the direction of the grooves, if they are helicoidal (6), pulled along by the lateral currents and suctioned by the resulting whirlwind.
  • the friction is reduced to a minimum, helping the second phase speed up the projectile as much as possible from the velocity achieved by the first phase.
  • the consecutive, but "almost" simultaneous, explosion of the second phase mainly generates pushing force, since the projectile is practically in the smooth span and furthermore, it speeds it up starting from a velocity and acceleration already achieved by the first phase.
  • the distance that the first phase (9) can advance until the limit of the grooves (6) will be greater than the length of the material stuffed into the neck of the cannula (11).
  • both the first phase (9) as well as the second (8) can have secondary initiating charges, both in order to ensure the lighting of the phases and so that they do so in the times set, in a uniform and standardised manner, in order to establish standardised ballistic values, in necessary cases.
  • opening valves can be added for drops in interior pressure, in order to counteract the possible decelerating effect that could produce an implosion after the explosion of the second phase due to the difference between the volume to be filled and the volume produced by the explosion of the second phase.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention porte sur un canon du type de ceux qui possèdent une âme lisse et une chambre à l'intérieur de laquelle est logée une cartouche, lequel canon comporte une chambre d'expansion des gaz située entre la chambre précitée et le reste du tube lisse, la chambre d'expansion des gaz comprenant deux zones différenciées: une zone ouverte de calibre supérieur à celui du tube lisse et une autre zone comprenant une pluralité de rainures longitudinales hélicoïdales ou rectilignes. Le fond incurvé des rainures s'étend depuis la courbure située à l'extrémité de la zone ouverte et les crêtes situées entre les rainures participent au calibrage du tube lisse. La cartouche est enveloppée d'un étui dans lequel se trouvent les charges des deux phases. La détonation de la capsule d'amorçage est transmise à la première phase via une canule métallique. Entre les deux phases de l'explosion se crée un espace de sécurité qui empêche les deux phases d'exploser en même temps.
PCT/EP2008/006261 2007-10-01 2008-07-30 Cartouche et canons améliorés Ceased WO2009043406A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200702557(4) 2007-10-01
ES200702557 2007-10-01

Publications (2)

Publication Number Publication Date
WO2009043406A2 true WO2009043406A2 (fr) 2009-04-09
WO2009043406A3 WO2009043406A3 (fr) 2009-07-23

Family

ID=40874917

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/006261 Ceased WO2009043406A2 (fr) 2007-10-01 2008-07-30 Cartouche et canons améliorés

Country Status (1)

Country Link
WO (1) WO2009043406A2 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH517282A (de) * 1970-05-20 1971-12-31 Hubertus Handelsgmbh Handfeuerwaffe
US3837108A (en) * 1973-06-05 1974-09-24 G Seitz Device for the reduction of kinetic energy of bullets from cartridge ammunition
US4527348A (en) * 1984-01-27 1985-07-09 D. C. Brennan Firearms, Inc. Gun barrel
FR2570175A1 (fr) * 1984-09-12 1986-03-14 Jacquier Pierre Chambre(s) de compensation. dispositif visant a modifier le regime de fonctionnement des armes a feu

Also Published As

Publication number Publication date
WO2009043406A3 (fr) 2009-07-23

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