WO2020097741A1 - Cartouche et douille - Google Patents

Cartouche et douille Download PDF

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Publication number
WO2020097741A1
WO2020097741A1 PCT/CA2019/051636 CA2019051636W WO2020097741A1 WO 2020097741 A1 WO2020097741 A1 WO 2020097741A1 CA 2019051636 W CA2019051636 W CA 2019051636W WO 2020097741 A1 WO2020097741 A1 WO 2020097741A1
Authority
WO
WIPO (PCT)
Prior art keywords
case
cartridge
cartridge case
base end
end portion
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/CA2019/051636
Other languages
English (en)
Inventor
Yann ROUTHIER
John Macdougall
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.)
General Dynamics Ordnance and Tactical Systems Canada Inc
Original Assignee
General Dynamics Ordnance and Tactical Systems Canada Inc
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 General Dynamics Ordnance and Tactical Systems Canada Inc filed Critical General Dynamics Ordnance and Tactical Systems Canada Inc
Publication of WO2020097741A1 publication Critical patent/WO2020097741A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/26—Cartridge cases
    • F42B5/28—Cartridge cases of metal, i.e. the cartridge-case tube is of metal
    • F42B5/285—Cartridge cases of metal, i.e. the cartridge-case tube is of metal formed by assembling several elements
    • 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
    • F42B5/26—Cartridge cases
    • F42B5/36—Cartridge cases modified for housing an integral firing-cap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0807—Primers; Detonators characterised by the particular configuration of the transmission channels from the priming energy source to the charge to be ignited, e.g. multiple channels, nozzles, diaphragms or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
    • F42C19/083—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition characterised by the shape and configuration of the base element embedded in the cartridge bottom, e.g. the housing for the squib or percussion cap

Definitions

  • the technical field relates generally to cartridge cases and cartridges for weapon systems, and more particularly, relates to relatively lightweight cartridge cases including a front shell and a reinforcing cap that is coupled to the front shell for weapon systems, and cartridges including such cartridge cases.
  • Cartridges include a cartridge case that contains other major components of the cartridge used in weapon systems, including a propellant, a projectile or bullet, and a primer.
  • Prior art small caliber cartridge cases can be divided into 3 groups; brass cartridge cases, other metallic cartridge cases that are lighter weight than brass cartridge cases, and polymer lightweight cartridge cases.
  • Prior art lightweight cartridge cases made of polymers or combinations of polymers and metals may have varying levels of functional mechanical resistance. These varying levels depend on the weapon system used to fire the cartridge including all of the mechanical interactions that occur between the cartridge and the feeding, firing and extracting components in those weapon systems.
  • polymer cartridge cases require a thicker wall to compensate for reduced mechanical strength properties compared to conventional brass cartridge cases. This means a smaller inside diameter at the case body section is available for polymer cartridge cases.
  • a reduced internal case volume is of concern for end users of polymer lightweight cartridge cases due to the performance specification requirements of each small caliber cartridge. Reduced internal case volume translates to less propellant powder capacity and therefore, reduced muzzle velocity, resulting in less kinetic energy in the projectile at any distance after firing.
  • polymers are typically much weaker than metals and therefore, using polymers to form lightweight cartridge cases would normally require a thickening of the wall section along the length of a cartridge case to resist the forces imparted onto the cartridge case during weapon firing. This translates into a reduced cartridge internal volume, thus imposing a reduced maximum propellant charge weight that can be loaded into the cartridge case. In turn, this reduces the maximum velocity at which a projectile leaves a weapon system, resulting in reduced kinetic energy delivery to the target.
  • gluing projectiles to the cartridge case mouth of polymer lightweight cartridge cases to meet the CIP, SAAMI or military specification mandatory bullet extraction force requirements, such as the NATO (North Atlantic Treaty Organization) STANAG (STANdardization Agreement), is another concern with this sub-category of cartridge case designs.
  • bonding agent polymers do not offer enough spring back force on their own as compared to metals to adequately hold a projectile in the case mouth using standard mechanical assembly methods. Projectiles held too lightly by the case mouth normally exhibit more variable bullet extraction forces and thus, tend to increase the projectiles' standard deviation with respect to muzzle velocity, which then negatively affects accuracy and dispersion on the target.
  • a brass or steel cartridge case effectively functions as a thermal sink in conventional weapon systems.
  • heat generated from the burning gases gets absorbed by a highly conductive brass or steel cartridge case and the heat gets expelled out of the weapon with the brass or steel case during the post-firing extraction cycle.
  • a polymer cartridge case does not conduct heat very well, the polymer case will not absorb the heat as efficiently as a brass or steel cartridge case and therefore, does not remove heat as effectively upon being ejected from the weapon system. This, in turn, causes the weapon system to heat up quicker and imposes a more controlled and shorter firing sequence in order to not overheat the weapon system components.
  • polymers tend to rapidly lose their mechanical properties. This can be problematic when a weapon has been heated due to sustained firing and a polymer cartridge is then left for a time within the cartridge chamber. Past a certain temperature point, the polymer cartridge case could melt in the hot chamber or even rupture upon subsequent firing.
  • Prior art lightweight metallic cartridge cases can be divided into two main categories.
  • the first category includes a shell with an interior reinforcement and a second category includes a shell with an exterior reinforcement.
  • Lightweight metallic cartridge cases with an interior reinforcement may use lightweight aluminum for the interior reinforcement component. However, doing so may result in instances of aluminothermic reaction whereby the aluminum combusts when exposed to high temperatures and gas pressures above 40,000 PSI, which are typical conditions experienced during cartridge firing. The combusting aluminum can then no longer hold back the gas pressure and can split completely though the interior reinforcement, transferring the pressure to the outer shell which then stretches to failure.
  • U.S. Patent Application Publication No. 2019/0226817 Al utilizes a third component to achieve a strong coupling of two main components of the lightweight cartridge case.
  • This additional third component is required to prevent a flange failure when under substantially maximum extraction or pressurization force(s) as it is not only the only deformation mechanism of the manufacturing process used to build such cartridge cases, but also the main stress reducing and therefore supporting feature of the design.
  • this design fails to create an airtight seal between the two main components without the use of a fourth part, a gasket between the shell and the reinforcing cap, as no satisfactory definition of boundary conditions are given to achieve this mandatory goal.
  • a cartridge case adapted to be chambered in a weapon system includes a generally cylindrical front shell having a shell wall that surrounds an internal volume for containing a propellant.
  • the shell wall defines a case base end portion, a case body portion extending forward from the case base end portion towards a case mouth portion that is configured for holding a projectile.
  • the case base end portion has a first interlocking feature.
  • a reinforcing cap is disposed adjacent to the case base end portion on a side opposite the internal volume.
  • the reinforcing cap has an annular extraction groove, a primer pocket, a flash hole for providing fluid communication between the primer pocket and the internal volume, and a second interlocking feature.
  • the second interlocking feature extends inwardly towards the first interlocking feature to define a rib edge that is rounded, radiused, relatively sharp or pointed and engages the first interlocking feature to couple the reinforcing cap to the case base end portion of the generally cylindrical front shell.
  • a cartridge adapted to be chambered in a weapon system includes a cartridge case.
  • the cartridge case includes a generally cylindrical front shell having a shell wall that surrounds an internal volume.
  • the shell wall defines a case base end portion, a case body portion extending forward from the case base end portion towards a case mouth portion.
  • the case base end portion has a first interlocking feature.
  • a reinforcing cap is disposed adjacent to the case base end portion on a side opposite the internal volume.
  • the reinforcing cap has an annular extraction groove, a primer pocket, a flash hole for providing fluid communication between the primer pocket and the internal volume, and a second interlocking feature.
  • the second interlocking feature extends inwardly towards the first interlocking feature to define a rib edge that is rounded, radiused, relatively sharp or pointed and engages the first interlocking feature to couple the reinforcing cap to the case base end portion of the generally cylindrical front shell.
  • the cartridge further includes a projectile disposed in the case mouth portion.
  • a propellant is disposed in the internal volume and is ignitable to propel the projectile from the case mouth in a forward direction.
  • a primer is disposed in the primer pocket and is ignitable for igniting the propellant.
  • FIG. 1 is a side cross-sectional view illustrating a cartridge case in accordance with an exemplary embodiment
  • FIG. 2 is a side cross-sectional view illustrating a cartridge in accordance with an exemplary embodiment
  • FIG. 3 is a side cross-sectional view illustrating a cartridge case in accordance with an exemplary embodiment.
  • the exemplary embodiments taught herein provide a cartridge case for a cartridge adapted to be chambered in a weapon system.
  • the cartridge case includes a generally cylindrical front shell having a shell wall that surrounds an internal volume for containing a propellant.
  • the shell wall defines a case base end portion, a case body portion extending forward from the case base end portion, and a case mouth portion that extends forward of the case body portion and that is configured for holding a projectile.
  • the case base end portion has a first interlocking feature.
  • a reinforcing cap is disposed adjacent to the case base end portion on a side opposite the internal volume.
  • the reinforcing cap has an annular extraction groove, a primer pocket, a flash hole for providing fluid communication between the primer pocket and the internal volume.
  • a second interlocking feature engaging the first interlocking feature to couple the reinforcing cap to the case base end portion of the generally cylindrical front shell.
  • the generally cylindrical front shell includes a first metallic material and the reinforcing cap includes a second, relatively lightweight metallic material that is different than the first metallic material.
  • this novel, bi-metallic, multi-part cartridge case including the reinforcing cap locked onto a relatively thin-wall front shell allows for a redistribution of mass to reinforce critical, stress supporting areas of the cartridge case as compared to conventional lightweight cartridge cases.
  • Another additional advantage of the cartridge case disclosed herein is that, in some embodiments, a significant weight reduction of the cartridge case is achieved. Additionally, as such, the cartridge including the cartridge case has a significant weight reduction while maintaining all appreciable features of the conventional brass design.
  • the cartridge case includes the metallic reinforcing cap and the metallic front shell that has a relatively constant wall thickness through its entire length.
  • the front shell is dimensioned to fit properly into typical, existing small arms weapon system chambers and properly seals the chambers upon firing the cartridge.
  • the reinforcing cap is dimensioned to ensure that conventional weapon extractor systems can reliably grab and extract the spent cartridge case after firing.
  • the reinforcing cap is designed to prevent case failures at peak pressure and temperature during the firing cycle by effectively supporting the aft end of the steel case body of the front shell of the cartridge case.
  • both the front shell and the reinforcing cap are effectively joined together by means of plastic deformation of the front shell within the reinforcing cap.
  • the reinforcing cap which may be made from aluminum, is isolated from the hot burning propellant gases. This provides a positive protection against possible“bum through” observed in many prior art interior reinforcement lightweight cartridge case designs.
  • an additional advantage of the cartridge case disclosed herein is that, in some embodiments, an overall weight of the cartridge case is reduced by roughly 50% while the internal volume available to receive the propellant powder charge is increased by about 8% as compared to conventional brass cartridge cases. Further, the cartridge including such cartridge case has an overall weight reduction of at least 10% as compared to cartridges that include conventional brass cartridge cases.
  • the front shell is formed of 305 stainless steel, which has a nominal density of 7.99 g/cc
  • the reinforcing cap is formed of 7075-T6 aluminum, which has a density of 2.81 g/cc. While maximizing the aluminum to stainless steel volume ratio, the cartridge case has a weight reduction, when compared to a typical brass cartridge case, of about 50% for most conventional small arms ammunition.
  • the cartridge case maximizes internal case volume by introducing a constant wall thickness front shell, which is supported by the attached external reinforcing cap.
  • a constant wall thickness front shell which is supported by the attached external reinforcing cap.
  • conventional brass cartridge cases do not have a constant wall thickness.
  • the typical brass case is thinnest at the mouth and shoulder region and becomes progressively thicker as it nears its base. This is a consequence of the progressive deep drawing manufacturing process itself and cannot be remedied.
  • wall thickness In order to produce a full, solid case base using brass, wall thickness must smoothly increase from the thin neck area to the thick base area.
  • the internal case volume of brass cartridge cases is less than the internal case volume of the cartridge case disclosed herein.
  • the cartridge case isolates the aluminothermic sensitive area of the cartridge case so the cartridge case will not be susceptible to an aluminothermic reaction.
  • Prior art aluminum interior reinforcement metallic cartridge cases are susceptible to aluminothermic reactions by the nature of the sensitivity of aluminum to exposure to high temperatures and flame.
  • the exterior aluminum reinforcing end cap becomes completely insulated from the high flame temperature exposure and hot gas pressure generated during the cartridge firing process and therefore, the reinforcing end cap will not be susceptible to an aluminothermic reaction.
  • An additional advantage of the cartridge case disclosed herein is that, in some embodiments, a stronger mechanical interlock is formed between the front shell and the reinforcing cap via the first and second interlocking features.
  • a stronger mechanical interlock is formed between the front shell and the reinforcing cap via the first and second interlocking features.
  • a significantly increased stress supporting area is created.
  • the cartridge case is enhanced to withstand the weapon extraction forces that a cartridge case will be subjected to in a weapon system.
  • cartridge case splits are eliminated.
  • prior art polymer cartridge cases are severely limited in respect to possible dimensional changes in the case mouth area because of the geometrical and physical limitations imposed by current industrial and military standards regarding the weapon chamber and the projectile dimensions.
  • the exterior form of the cartridge case and the corresponding bullet are precisely defined to ensure commonality and interchangeability between the various cartridges and weapons (for a given caliber) produced by the plethora of manufacturers around the world.
  • Polymers typically being mechanically weaker than metals, would normally require a thicker case mouth wall section to sustain the high pressures and stresses involved in firing a cartridge.
  • An additional advantage of the cartridge case disclosed herein is that in some embodiments, the cartridge case does not experience any material creep when linked.
  • prior art polymer cartridges which have undergone material creep after being linked can be problematic and induce failures when going through a fully automatic machine gun firing cycle.
  • localized“bulging” of the polymer case at sections directly adjacent to the metallic link edges may occur and generate irregular case exterior diameters, which may in turn reduce performance reliability.
  • the material creeping phenomenon is the result of the constant pressure applied by a metallic link’s press-fit on a softer polymer cartridge case where the link firmly grabs the case.
  • Polymer cartridge cases have been known to be more susceptible to material creep or flow when stressed by the metallic links after being stored for extended periods of time.
  • the cartridge cases disclosed herein are creep-resistant, for example similar to the creep resistance of conventional brass cartridge cases.
  • the cartridge case is resistant to long-term ultraviolet (UV) light exposure.
  • UV ultraviolet
  • stainless steel and aluminum, for example, which form the front shell and the reinforcing cap, respectively are impervious to UV radiation and as such, their mechanical properties are not affected by long-term exposure to UV radiation. This is however not the case with many polymeric materials, which may experience material strength degradation as a result of long-term exposure to UV radiation.
  • the cartridge case is corrosion free.
  • stainless steel and aluminum, for example, which form the front shell and the reinforcing cap, respectively are corrosion-resistant metals. Galvanic corrosion between these two metals has been extensively studied, for example, using accelerated aging methods and the minimal resulting corrosion does not exceed what is currently acceptable for the long-term storage requirements of a cartridge case.
  • the cartridge case disclosed herein is compatible with high capacity cartridge loading and packaging equipment.
  • an important factor in the design of a new ammunition is its successful viability industrialization potential within existing industrial manufacturing facilities, thus obviating the requirement for new, specialized production equipment.
  • the cartridge cases disclosed herein can be efficiently and effectively manufactured on current, existing high-capacity loading and packing production equipment that is typically used in ammunition manufacturing plants today.
  • Production cadences for the cartridge cases disclosed herein are expected to be similar to those of cartridges made with conventional brass cartridge cases. This is however not the case with the more sensitive and complex polymer cartridge case designs.
  • An additional advantage of the cartridge case disclosed herein is that in some embodiments, the cartridge cases can be efficiently manufactured at a competitive cost.
  • being able to load the cartridge cases disclosed herein on existing production equipment means only a minimal tooling investment is required to get up to and achieve typical brass cartridge case level production rates.
  • the production cadences for the cartridge cases disclosed herein are similar to those with brass cartridge cases while steel and aluminum raw base materials are less expensive than brass.
  • price-wise, the cartridge cases disclosed herein will be competitive with brass cartridge cases once fully industrialized.
  • polymer cartridge cases, even when fully industrialized will still remain much more expensive due to their special manufacturing process requirements and resulting lower production cadence.
  • FIG. 1 is a side view illustrating a cartridge case 10 that is adapted to be chambered in a weapon system in accordance with an exemplary embodiment.
  • FIG. 2 is a side cross-sectional view illustrating a cartridge 12 including the cartridge case 10 depicted in FIG. 1.
  • the cartridge case 10 includes a generally cylindrical front shell 14 and a reinforcing cap 16 that is interlocked with the front shell 14.
  • the front shell 14 has a shell wall 18 that surrounds an internal volume 20 for containing a propellant 22.
  • the shell wall 18 defines a case base end portion 24, a case body portion 26 extending forward (e.g., distal direction 66) from the case base end portion 24 towards a case mouth portion 30, and optionally a case shoulder portion 28 extending forward from the case body portion 26 and tapering inwardly to the case mouth portion 30.
  • the cartridge case 10 for a pistol may not include a case shoulder portion 28 and, as such, the case body portion 26 extends straight forward to and terminates at the case mouth portion 30 without tapering inwardly such that the case mouth portion 30 has a substantially similar diameter compared to the case body portion 26.
  • the cartridge case 10 for a rifle may include the case shoulder portion 28 that tapers inwardly and that is disposed between the case body portion 26 and the case mouth portion 30 which has a narrower diameter than the case body portion 26.
  • the case mouth portion 30 holds a projectile 32.
  • the case base end portion 24 has a first interlocking feature 34.
  • the reinforcing cap 16 is disposed adjacent to the case base end portion 24 on a side opposite the internal volume 20.
  • the reinforcing cap 16 has an annular extraction groove 36, a primer pocket 38, a flash hole 40 for providing fluid communication between the primer pocket 38 and the internal volume 20, and a second interlocking feature 42.
  • the second interlocking feature 42 engages the first interlocking feature 34 to couple the reinforcing cap 16 to the case base end portion 24 of the front shell 14.
  • the cartridge case 10 is a bi-metallic cartridge case.
  • the front shell 14 is formed of a first metallic material and the reinforcing cap 16 is formed of a second relatively lightweight metallic material that is different than the first metallic material.
  • the first metallic material is selected from carbon steel, stainless steel, brass, aluminum, aluminum alloys, nickel, and nickel alloys, for example, stainless steel.
  • the second relatively lightweight metallic material is selected from aluminum and alloys thereof, titanium and alloys thereof, magnesium and alloys thereof, for example an aluminum alloy.
  • the shell wall 18 of the front shell 14 has a substantially constant wall thickness.
  • advantageously having the front shell 14 with a substantially constant wall thickness allows the front shell 14 of the cartridge case 10 to have an enhanced internal volume 20 as compared to the internal volume of conventional brass cartridge cases that are formed by a deep drawing process or the like and therefore, can hold an increase volume of the propellant 22.
  • the case base end portion 24 of the front shell 14 has an annular bulge section 44 that forms at least part of the first interlocking feature 34.
  • the case base end portion 24 has a base 46, the annular bulge section 44 with an annular tapered forward section 48 (in the distal direction 66) and an annular flared distal section 50 (in the distal direction 66) that extends to the aft section of the case body portion 26.
  • the first interlocking feature 34 is configured at least in part as an annular recessed feature 134, e.g., groove, annular V-shaped groove, or the like, that is defined between the annular tapered forward section 48 and the annular flared distal section 50 of the case base end portion 24.
  • annular recessed feature 134 e.g., groove, annular V-shaped groove, or the like
  • the reinforcing cap 16 has a reinforcing cap body portion 52 that includes the primer pocket 38, the annular extraction groove 36, and the flash hole 40.
  • a reinforcing cap sleeve portion 54 extends forward from the reinforcing cap body portion 52.
  • the reinforcing cap sleeve portion 54 and the reinforcing cap body portion 52 together form a pocket 56 that has the case base end portion 24 disposed therein.
  • the reinforcing cap sleeve portion 54 has a locking rib 43 that forms at least part of the second interlocking feature 42.
  • the locking rib 43 is an annular locking rib that extends or tapers inwardly towards the groove or annular recessed feature 134, for example tapers inwardly to a rib edge 142 that is rounded, radiused, relatively sharp or pointed (e.g., slight radius or non-radius rib edge such as having a radius of from about 0 to about 0.5 mm), to substantially match the annular tapered forward section 48 and flares outwardly therefrom to substantially match the annular flared distal section 50, thereby defining a substantially V-shaped annular locking rib, and engages with the annular recessed feature 134 of the case base end portion 24 to securely interlock the reinforcing cap 16 with the front shell 14.
  • a rib edge 142 that is rounded, radiused, relatively sharp or pointed (e.g., slight radius or non-radius rib edge such as having a radius of from about 0 to about 0.5 mm)
  • the cartridge 12 includes the cartridge case 10, the propellant 22, the projectile 32, and a primer 60.
  • the projectile 32 is disposed in the case mouth portion 30.
  • the propellant 22 is disposed in the internal volume 20 and is ignitable to propel the projectile 32 from the case mouth 30 in a forward direction (indicated by single headed arrow 62).
  • the primer 60 is disposed in the primer pocket 38 and is ignitable for igniting the propellant 22.
  • a cartridge case 110 is provided similarly configured as the cartridge case 10 illustrated in FIG. 1 including the front shell 14, the reinforcing cap 16, the first interlocking feature 34, and the second interlocking feature 42 but with the exception that the interlocking feature 34 includes a plurality of annular recessed features 134 and 136 and the interlocking feature 42 includes a plurality of locking ribs 43 and 68.
  • the annular recessed features 134 and 136 are axially spaced apart by the annular bulge section 44 and are independently configured as a groove, annular V-shaped groove, or the like.
  • the reinforcing cap sleeve portion 54 has the locking rib 43 and 68 that are axially spaced apart from each other and that extend inwardly to rib edges 142 and 144, substantially matching and directly interfacing with the annular recessed features 134 and 136 of the interlocking feature 34 of the case base end portion 24 to securely interlock the reinforcing cap 16 with the front shell 14.
  • this ensures an air-tight seal between the reinforcing cap 16 and the front shell 14, for example without the use or presence of any liquid and/or solid seal(s).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

La présente invention concerne des cartouches et des douilles conçues pour être reçues dans des systèmes d'arme. Dans un exemple, une douille comprend une coque avant présentant une partie d'extrémité de base de douille, une partie de corps de douille s'étendant vers l'avant depuis la partie d'extrémité de base de douille en direction d'une partie d'embouchure de douille qui est configurée pour maintenir un projectile. La partie d'extrémité de base de douille présente un premier élément de verrouillage mutuel. Un capuchon de renforcement est disposé adjacent à la partie d'extrémité de base de douille sur un côté opposé au volume interne. Le capuchon de renforcement présente une rainure d'extraction annulaire, une poche d'amorce, un évent destiné à assurer une communication fluidique entre la poche d'amorce et le volume interne, et un second élément de verrouillage mutuel qui vient en prise avec le premier élément de verrouillage mutuel pour accoupler le capuchon de renforcement à la partie d'extrémité de base de douille.
PCT/CA2019/051636 2018-11-15 2019-11-15 Cartouche et douille Ceased WO2020097741A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862767795P 2018-11-15 2018-11-15
US62/767,795 2018-11-15

Publications (1)

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WO2020097741A1 true WO2020097741A1 (fr) 2020-05-22

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EP3872438B1 (fr) 2020-02-27 2023-06-07 Rabuffo SA Cartouche de munition
DE102020124559B4 (de) 2020-09-21 2024-05-02 Ruag Ammotec Ag Patronenhülse sowie Verfahren und Werkzeug zum Fügen von Bodenstück und Hülsenmantel einer mehrteiligen Patronenhülse
CN113857772A (zh) * 2021-08-27 2021-12-31 隆昌山川机械有限责任公司 一种基于冷引伸的药筒制造方法及模具
DE102021124431A1 (de) 2021-09-21 2023-03-23 Ruag Ammotec Ag Verfahren sowie Werkzeug zum Herstellen eines Bodenstücks einer mehrteiligen Patronenhülse, Bodenstück und Patronenhülse
US11519702B1 (en) 2021-12-01 2022-12-06 General Dynamics Ordnance and Tactical Systems -Canada Inc. Cartridge and cartridge case
DE102024109615A1 (de) * 2024-04-05 2025-10-09 Swissp Defence Ag Tiefgezogene Hybridhülse

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US4598445A (en) * 1985-01-02 1986-07-08 Johnel M. O'Connor Two component cartridge case and method of assembly
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