WO2005043072A1 - Cartouche - Google Patents

Cartouche Download PDF

Info

Publication number
WO2005043072A1
WO2005043072A1 PCT/SE2004/001588 SE2004001588W WO2005043072A1 WO 2005043072 A1 WO2005043072 A1 WO 2005043072A1 SE 2004001588 W SE2004001588 W SE 2004001588W WO 2005043072 A1 WO2005043072 A1 WO 2005043072A1
Authority
WO
WIPO (PCT)
Prior art keywords
cartridge
insert
seat
pressure chamber
passage
Prior art date
Application number
PCT/SE2004/001588
Other languages
English (en)
Inventor
Torsten Werner
Original Assignee
Comtri Teknik Ab
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 Comtri Teknik Ab filed Critical Comtri Teknik Ab
Priority to EP04800251A priority Critical patent/EP1690062A1/fr
Priority to US10/533,801 priority patent/US20050268808A1/en
Priority to CA002543729A priority patent/CA2543729A1/fr
Priority to AU2004286190A priority patent/AU2004286190A1/en
Publication of WO2005043072A1 publication Critical patent/WO2005043072A1/fr
Priority to NO20062565A priority patent/NO20062565L/no

Links

Classifications

    • 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
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/26—Cartridge cases
    • 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
    • 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 invention refers to a cartridge adapted for insertion into a cartridge-seat that communicates with a low-pressure chamber, such as in a shell case and, specifically, a reusable shell case. More precisely, the invention refers to a propellant cartridge having a replaceable restriction that, upon charging or recharging the cartridge using conventional recharging tools, may be adapted to various powder charges in order to ensure a complete combustion of the entire powder charge.
  • Propellant cartridges are used in various connections, such as in weaponry for expulsion of projectiles or in industrial applications to achieve mechanical results.
  • the propellant cartridge usually comprises a propellant formed by a powder charge enclosed by a cylinder sleeve, and a detonator that is sensitive to mechanical impulse fitted into the rear end of the sleeve effective for firing the propellant.
  • the forward end of the cartridge is usually sealed through a star-crimp.
  • shell cases are known to be formed with a low- pressure chamber having a comparatively large volume wherein the combustion gases are allowed to expand to a pressure that results in a desired exit velocity for the projectile.
  • the powder charge is ignited inside a high-pressure chamber having a comparatively smaller volume and communicating with the low-pressure chamber via a gas exhaust channel.
  • the propellant cartridge may be equipped with a membrane adapted to be ruptured only when sufficient pressure, i.e. a pressure needed for a complete combustion of the powder charge, is produced by the burning propellant. Combustion gases will then flow through the ruptured membrane and into the low- pressure chamber, where the gas expands to a suitable lower pressure acting against the rear end plane of the projectile, for expelling the same at the intended velocity.
  • a reusable shell case having a high-pressure chamber and a low-pressure chamber is disclosed in WO 01/81854 Al.
  • this shell case which is separable having a dismountable rear portion that receives a propellant cartridge in a cartridge-seat forming a high-pressure chamber
  • the connection between high-pressure and low- pressure chambers is formed by a gas exhaust channel acting as a constriction which is sized to provide a pressure in the high-pressure chamber that is favorable for a complete combustion of the powder.
  • This reusable shell case contains no de- formable details that must be replaced upon recharging, except for the used propellant cartridge, for which reason the shell case is particularly suitable for repeated recharge and firing.
  • US 6,041,712 discloses a shell case having a high-pressure chamber and a low-pressure chamber connected through a gas exhaust channel acting as a constriction.
  • the channel is formed in a front wall of a cartridge-seat that is formed integrally in the case, in another embodiment the channel is formed in a front wall of a sleeve adapted for protecting the propellant cartridge against the high pressures that are generated in this connection.
  • a membrane or a plug of material is arranged in the propellant cartridge and dimensioned to be ruptured at a predetermined pressure.
  • Drive pressure and exit velocity may be varied and adapted to different projectiles, primarily by dimensioning the size of the powder charge, or by choosing a powder with respect to its properties such as burning speed, for example.
  • a static constriction of the connection between high-pressure and low-pressure chambers in a re- chargeable device may be limiting for the possibility to control the projectile's exit velocity, particularly when a low velocity is desired, since a static constriction will be optimized only for a propellant charge of a certain size.
  • the invention aims to solve the above mentioned problem by providing a cartridge that by itself operates as a high-pressure chamber without being dependent on the shell case for generating the pressure and temperature required for a complete and perfect combustion of the powder charge.
  • This object also includes the provision of a cartridge that is readily adaptable to differently sized propellant charges upon recharging by use of conventional reloading tools.
  • the objects of the invention are met in a cartridge equipped with a separate and exchangeable insert formed with a passage going there through and acting as a constriction which delays the passage of combustion gases exhausted from the cartridge.
  • the insert has an outer diameter adapted to the inside diameter of the cartridge in order to be depressed into the cartridge similar to a bullet of adequate caliber, by use of conventional reloading tools.
  • the insert may be combined with a stemming covering the passage at the inner or outer end of the insert.
  • a stemming covering the passage at the inner or outer end of the insert.
  • the purpose of such a stemming is. primarily to protect the powder charge, though it may alternatively be dimensioned to be ruptured by a predetermined gas pressure, similar to the prior art membranes.
  • Fig. 1 shows one embodiment of a propellant cartridge according to the invention
  • Fig. 2 shows the propellant cartridge according to the invention applied in a divisible shell case.
  • figs. 1 and 2 show a propellant cartridge 1 shaped as a cylindrical container having a primer 2 received in its rear end, and a propellant charge 3, such as a powder charge 3, received in the container- shaped portion.
  • the cartridge 1 is adapted for insertion into a cartridge seat 4 shaped as a cylindrical chamber having an open rear end, and which has a wall 5 in its opposite, forward end.
  • the cartridge-seat 4 communicates with a low-pressure chamber 6 formed in a shell case as illustrated in the drawings, or alternatively in any other type of expulsion device.
  • the connection between cartridge- seat and low-pressure chamber is formed as a central opening through the wall 5.
  • the diameter of a gas exhaust passage between the high-pressure chamber and the low-pressure chamber is critical in respect of ensuring a proper pressure and temperature for the complete and perfect combustion of a propellant charge that is sized to control the exit velocity of the subject projectile P.
  • a fixed diameter of this gas exhaust passage restricts the possibility of achieving constant exit velocities, particularly within a lower velocity range.
  • the passage I between high- and low-pressure chambers is no longer decisive for the control of exit velocities by sizing the powder charge or by the choice of powder properties.
  • a separate and exchangeable insert 7 is inserted.
  • Said insert covers the section of the cartridge and has a passage 8 going there through, through which passage the combustion gas exits from the cartridge.
  • the passage 8 connects the low-pressure chamber 6 to the inner volume of the cartridge, and may have a length sufficient to reach through the front wall 5 of the cartridge-seat in order to mouth in the low-pressure chamber, as in the shown embodiment.
  • the insert 7 is cylindrical, having a portion 9 inserted into the container portion of the cartridge, the diameter of which is adapted to seal against the cylindrical wall of the cartridge container portion.
  • a front end of the insert 7 is formed with a shoulder 10.
  • the shoulder 10 has a radial extension and connects the portion 9, which is inserted into the cartridge, to a portion 11 of less diameter extend- ing from the cartridge and received by the opening I when the cartridge is seated in the cartridge-seat.
  • the shoulder 10 is shaped and adapted to be forced into sealing contact with the front wall 5 of the cartridge-seat upon ignition of the powder charge.
  • the insert 7 preferably is made of a material having less hardness than the material of the cartridge- seat in order to allow for a slight deformation in the surface of the shoulder 10. This way will be secured a sealing contact that prevents combustion gases rom leaking past the envelope surface of the insert 7.
  • the insert 7 is made of metal or light metal, such as aluminum, copper or copper alloy.
  • the passage 8 is dimensioned in respect of the powder charge size, the desired expulsion pressure and exit velocity, and operates like a constriction that delays the flow of combustion gases into the low-pressure chamber whereby a pressure that is sufficient for a complete combustion is built up in the cartridge.
  • the passage may be designed to mouth in the low-pressure chamber as illustrated in the shown embodiment, or designed to mouth in the opening through the front wall 5.
  • the passage 8 may also be formed with radially oriented openings and a closed forward end (not shown). Adaptation of the passage particularly involves the dimensioning of the passage's cross sectional area, and may include as well the sizing of its axial length, the length of the insert, and the available volume of the cartridge that is related to the depth by which the insert is inserted in the cartridge.
  • the passage 8 may also be shaped ' different from what is illustrated here, and need not have a continuous section throughout its axial length. Further, one or several sealing elements may be arranged at the inner end or at the outer end of the insert 7, in order to seal the passage and adapted to be ruptured by ignition of the powder charge.
  • a membrane 12 is shown in broken lines to rest towards the inner end of the insert and covering the passage 8.
  • the membrane 12 may be designed and dimensioned to be ruptured by a predetermined pressure.
  • the membrane 12 may, for example, be made of synthetic material or metal, and may be formed with indication of fracture where appropriate.
  • the dimensioning of the passage 8 is less critical for building up a desired pressure in the cartridge 1.
  • the passage and membrane may be dimensioned in combination to secure the necessary pressure within the cartridge.
  • a propellant cartridge 1 is shown to be mounted in a divisible shell case 13, a shell case known per se from WO 01/81854 Al.
  • This shell case has a dismountable rear portion 14 having a through hole 15.
  • the rear portion 14 is shown being connected to a front portion 16 by means of a threaded connection.
  • a portion 17 formed with a reduced diameter in the rear end of the cartridge 1 is received through the hole 15.
  • a primer 2 is mounted in said reduced diameter portion, the primer substantially leveling with a rear end plane 18 of the dismountable rear portion of the shell case when the cartridge is mounted therein.
  • the inventive solution ensures that the primer upon reloading the shell case always is correctly positioned for an effective impulse from the firing pin upon firing.
  • the insert 7 which is insert- able into the cartridge compensates for variations in length of the cartridge- seat, thus preventing misfiring of the cartridge.
  • the insert 7 is depressed into the cartridge at an insertion depth that puts the forward end of the insert into contact with the wall 5 of the cartridge-seat before the rear portion of the shell case is screwed completely onto the front portion. Then, the rear portion is screwed down to its end position, whereby the insert 7 is further depressed into the cartridge thus securing a bearing contact in both ends of the propellant cartridge.
  • the cartridge initially has an oversized but adjustable axial length in relation to the cartridge-seat it will be ensured that the primer 2 always assumes the correct axial position for ignition through the impact by the firing pin.
  • This aspect of the invention may be particularly important with respect to reloading in active service conditions wherein particulate matter in the threaded connection between the shell case portions might obstruct a complete screwing together of the shell case portions.
  • constriction is formed in a separate and exchangeable insert there will be provided increased possibilities for optimization of the propellant cartridge with respect to a desired exit velocity, by choosing the proper constriction in order to secure a favorable pressure and resulting temperature in the high- pressure chamber. Further, since the insert has the same external dimension as a bullet caliber matching the cartridge diameter, the cartridge may readily be charged or recharged by the use of conventional reloading tools.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne une cartouche (1) conçue pour être insérée dans un logement de cartouche communiquant avec une chambre à basse pression. Cette cartouche fonctionne elle-même comme une chambre à pression grâce à un insert comportant un étranglement retardant l'écoulement des gaz de combustion dans la chambre à basse pression. Cet insert est conçu pour être inséré dans la cartouche à l'aide d'outils de recharge classiques.
PCT/SE2004/001588 2003-11-04 2004-11-03 Cartouche WO2005043072A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP04800251A EP1690062A1 (fr) 2003-11-04 2004-11-03 Cartouche
US10/533,801 US20050268808A1 (en) 2003-11-04 2004-11-03 Cartridge
CA002543729A CA2543729A1 (fr) 2003-11-04 2004-11-03 Cartouche
AU2004286190A AU2004286190A1 (en) 2003-11-04 2004-11-03 Cartridge
NO20062565A NO20062565L (no) 2003-11-04 2006-06-02 Drivpatron

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0302916A SE0302916D0 (sv) 2003-11-04 2003-11-04 Utbytbar drivpatron
SE0302916-2 2003-11-04

Publications (1)

Publication Number Publication Date
WO2005043072A1 true WO2005043072A1 (fr) 2005-05-12

Family

ID=30439663

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2004/001588 WO2005043072A1 (fr) 2003-11-04 2004-11-03 Cartouche

Country Status (7)

Country Link
US (1) US20050268808A1 (fr)
EP (1) EP1690062A1 (fr)
AU (1) AU2004286190A1 (fr)
CA (1) CA2543729A1 (fr)
NO (1) NO20062565L (fr)
SE (1) SE0302916D0 (fr)
WO (1) WO2005043072A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU92216A1 (fr) * 2013-06-17 2014-12-18 Securinov Sa Douille régulée en pression de combustion pour petit et moyen calibre
WO2014203215A1 (fr) * 2013-06-20 2014-12-24 Atlantis Manufacturing Management Services Proprietary Limited Coup complet de grenade
CN104541020A (zh) * 2012-04-24 2015-04-22 法克有限公司 能量传递装置
EP2643652A4 (fr) * 2010-11-25 2017-03-08 Advanced Material Engineering Pte Ltd Projectile en cartouche

Families Citing this family (30)

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Publication number Priority date Publication date Assignee Title
WO2010003013A1 (fr) * 2008-07-02 2010-01-07 Safariland, Llc Projectile non létal en une seule pièce
FR2938907B1 (fr) * 2008-11-27 2013-12-13 Nexter Munitions Dispositif propulsif a progressivite regulee.
US10081057B2 (en) 2010-11-10 2018-09-25 True Velocity, Inc. Method of making a projectile by metal injection molding
US10048049B2 (en) 2010-11-10 2018-08-14 True Velocity, Inc. Lightweight polymer ammunition cartridge having a primer diffuser
US10591260B2 (en) 2010-11-10 2020-03-17 True Velocity Ip Holdings, Llc Polymer ammunition having a projectile made by metal injection molding
US10041770B2 (en) 2010-11-10 2018-08-07 True Velocity, Inc. Metal injection molded ammunition cartridge
US11118875B1 (en) 2010-11-10 2021-09-14 True Velocity Ip Holdings, Llc Color coded polymer ammunition cartridge
US10429156B2 (en) 2010-11-10 2019-10-01 True Velocity Ip Holdings, Llc Subsonic polymeric ammunition cartridge
US10480915B2 (en) 2010-11-10 2019-11-19 True Velocity Ip Holdings, Llc Method of making a polymeric subsonic ammunition cartridge
US10876822B2 (en) 2017-11-09 2020-12-29 True Velocity Ip Holdings, Llc Multi-piece polymer ammunition cartridge
US10048052B2 (en) 2010-11-10 2018-08-14 True Velocity, Inc. Method of making a polymeric subsonic ammunition cartridge
US11340050B2 (en) 2010-11-10 2022-05-24 True Velocity Ip Holdings, Llc Subsonic polymeric ammunition cartridge
US10190857B2 (en) 2010-11-10 2019-01-29 True Velocity Ip Holdings, Llc Method of making polymeric subsonic ammunition
US8561543B2 (en) 2010-11-10 2013-10-22 True Velocity, Inc. Lightweight polymer ammunition cartridge casings
US10352670B2 (en) * 2010-11-10 2019-07-16 True Velocity Ip Holdings, Llc Lightweight polymer ammunition cartridge casings
US20170191813A9 (en) * 2010-11-10 2017-07-06 True Velocity, Inc. Primer diffuser for polymer ammunition cartridges
USD861118S1 (en) 2011-11-09 2019-09-24 True Velocity Ip Holdings, Llc Primer insert
FR2986318B1 (fr) * 2012-01-26 2014-02-28 Nexter Munitions Munition non letale
US9329004B2 (en) * 2014-05-08 2016-05-03 Scot M Pace Munition having a reusable housing assembly and a removable powder chamber
AU2016298943B2 (en) 2015-07-27 2021-09-16 Shell Shock Technologies LLC Fire arm cartridge and method of making
US9587918B1 (en) 2015-09-24 2017-03-07 True Velocity, Inc. Ammunition having a projectile made by metal injection molding
US9518810B1 (en) 2016-03-09 2016-12-13 True Velocity, Inc. Polymer ammunition cartridge having a two-piece primer insert
US9506735B1 (en) 2016-03-09 2016-11-29 True Velocity, Inc. Method of making polymer ammunition cartridges having a two-piece primer insert
US9523563B1 (en) 2016-03-09 2016-12-20 True Velocity, Inc. Method of making ammunition having a two-piece primer insert
US9835427B2 (en) * 2016-03-09 2017-12-05 True Velocity, Inc. Two-piece primer insert for polymer ammunition
US9551557B1 (en) 2016-03-09 2017-01-24 True Velocity, Inc. Polymer ammunition having a two-piece primer insert
DE102017110871A1 (de) * 2017-05-18 2018-11-22 Rheinmetall Waffe Munition Gmbh Antriebssystem für Patronenmunition
US10760882B1 (en) 2017-08-08 2020-09-01 True Velocity Ip Holdings, Llc Metal injection molded ammunition cartridge
CN108225133B (zh) * 2018-01-12 2020-01-31 中国工程物理研究院化工材料研究所 一种飞片式热敏爆管
US20190178616A1 (en) * 2019-02-17 2019-06-13 Dorian Robert Golej Mushroom Bullet

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2643652A4 (fr) * 2010-11-25 2017-03-08 Advanced Material Engineering Pte Ltd Projectile en cartouche
EP2643652B1 (fr) 2010-11-25 2018-05-02 Advanced Material Engineering Pte Ltd Projectile en cartouche
KR101922738B1 (ko) 2010-11-25 2018-11-27 어드밴스드 머티리얼 엔지니어링 피티이 엘티디 카트리지 추진체
CN104541020A (zh) * 2012-04-24 2015-04-22 法克有限公司 能量传递装置
EP2841688A4 (fr) * 2012-04-24 2015-12-02 Fike Corp Dispositif de transfert d'énergie
US9963398B2 (en) 2012-04-24 2018-05-08 Fike Corporation Energy transfer device
LU92216A1 (fr) * 2013-06-17 2014-12-18 Securinov Sa Douille régulée en pression de combustion pour petit et moyen calibre
WO2014203215A1 (fr) * 2013-06-20 2014-12-24 Atlantis Manufacturing Management Services Proprietary Limited Coup complet de grenade
US9557150B2 (en) 2013-06-20 2017-01-31 Atlantis Manufacturing Management Services Proprietary Limited Grenade round

Also Published As

Publication number Publication date
AU2004286190A1 (en) 2005-05-12
NO20062565L (no) 2006-06-02
EP1690062A1 (fr) 2006-08-16
US20050268808A1 (en) 2005-12-08
SE0302916D0 (sv) 2003-11-04
CA2543729A1 (fr) 2005-05-12

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