EP1864077A1 - Projectile a expansion pour armes a feu - Google Patents

Projectile a expansion pour armes a feu

Info

Publication number
EP1864077A1
EP1864077A1 EP05714402A EP05714402A EP1864077A1 EP 1864077 A1 EP1864077 A1 EP 1864077A1 EP 05714402 A EP05714402 A EP 05714402A EP 05714402 A EP05714402 A EP 05714402A EP 1864077 A1 EP1864077 A1 EP 1864077A1
Authority
EP
European Patent Office
Prior art keywords
projectile
plunger
expansion
shank
fact
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.)
Withdrawn
Application number
EP05714402A
Other languages
German (de)
English (en)
Inventor
Laudemiro Martini Filho
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.)
CBC Companhia Brasileira de Cartuchos
Original Assignee
CBC Companhia Brasileira de Cartuchos
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 CBC Companhia Brasileira de Cartuchos filed Critical CBC Companhia Brasileira de Cartuchos
Publication of EP1864077A1 publication Critical patent/EP1864077A1/fr
Withdrawn legal-status Critical Current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
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/34—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect expanding before or on impact, i.e. of dumdum or mushroom type

Definitions

  • projectiles especially those used in police work and personal defense, must feature a high capability for stopping an attacker at once, without traversing the target and thus risking injuring innocent people. That is particularly important when the use of said ammunition is considered under extreme situations, such as that involving life risk for the police officer, an innocent pedestrian, etc.
  • projectiles used in police operations must be able to pass through tactical obstacles that offer protection to the criminal, such as vehicle doors and windscreen.
  • tactical obstacles that offer protection to the criminal, such as vehicle doors and windscreen.
  • the same projectile must do so without altering its original trajectory, lest there is serious risk of injury to bystanders that were not the intended target of police action.
  • hollow-point projectile design can be found on PCT/BR04/000006, "LEAD-FREE MONOBLOC EXPANSION PROJECTILE AND MANUFACTURING PROCESS" filed by the same Applicant, which describes a solid monobloc projectile with a cavity on the longitudinal axis which is opened towards the fore end of the projectile.
  • Said hollow-point projectile which features a plurality of regularly spaced grooves distributed over the external front face, opens up upon hitting a soft target, creating a flower-shaped element which is much more effective in transferring energy to the target than are standard solid profile projectiles.
  • the storage and loading of the ammunition raises issues for hollow-pointed projectiles, which could collect dust and other external particles in the open cavity, possibly compromising the performance of the ammunition when fired.
  • Knapworst patent ⁇ rojectile Among the fundamental design features of the Knapworst patent ⁇ rojectile are the use of the plastic plunger conical head to force the projectile wall open upon impact (there are no external slits to foster the opening of the projectile wall into a flower shape) and the precise machining of the shapes of both the plunger shank and the corresponding projectile shaft that receives it upon impact. Knapworst's patent design, although solving many of the already addressed inconveniences of open-cavity projectiles, presents some inconveniences of its own. The precision of machining and use of annealing become critical for the performance of the projectile, because the slightest geometrical or dimensional imperfection might cause problems such as irregular expansion of the cavity, breakage of the plunger, etc.
  • the projectile of the present invention combines the advantages of both the solid and hollow point designs, featuring the initial ballistics of a solid projectile and the terminal (target) ballistic effects of a hollow-point projectile, without the risk of collecting undesired foreign matter into the cavity in the unfired configuration and also eliminating the possible feeding problems from the magazine to the barrel chamber. That is achieved with comparably simple manufacturing process control, with major reduction of precision requirements at no risk to the performance of the projectile .
  • One object of the present invention is to disclose a projectile that easily and quickly deforms upon expansion when penetrating soft targets. Another object of the present invention is to ensure the proper sinking of the plunger into the projectile body, so that after the initial impact the cavity in the front face of the projectile is completely exposed and brings about the desired terminal (target) ballistic effects. Another object of the present invention is to avoid any sort of fragmentation of the projectile, so as to avoid unintended damage to targets other than the one intentionally fired upon.
  • Fig. 1 is a side view illustrating the general external shape of an unfired projectile according to the present invention, with slits (a) and in the alternative configuration without slits (b) ;
  • Fig. 2 is a longitudinal cross-section view illustrating an unfired projectile according to the present invention
  • Fig . 3 is a longitudinal cross-section view illustrating a projectile according to the present invention in its fired configuration, after it has hit the target, with slits (a) and in the alternative configuration without slits (b) ;
  • Fig. 4 is a perspective view illustrating a projectile according to the present invention in its fired configuration, after it has hit the target, with slits (a) and an the alternative configuration without slits (b) ;
  • Fig. 5 is a longitudinal cross-section view illustrating an unfired projectile according to the state of the art
  • Fig. 6 is a longitudinal cross-section view illustrating a projectile according to the state of the art in its fired configuration, after it has hit the target;
  • Fig. 7 is a perspective view illustrating a projectile according to the state of the art in its fired configuration, after it has hit the target .
  • the present invention eliminates the inconveniences found in the state of the art by the use of a specific configuration that comprises two pieces:
  • a deformable, cylindrical projectile body (1) with a front part tapering towards the front end.
  • This cylindrical projectile features an internal cavity opened towards the front end, being said cavity composed of an expansion chamber (2) and a cylindiical shaft extension (3) which is continuously connected with it and is positioned right behind, both cavities featuring radial symmetry regarding the longitudinal axis of the projectile, being the shape of said expansion chamber preferably identical to that described in PCT/BR04/000006, "LEAD-FREE MONOBLOC EXPANSION PROJECTILE AND MANUFACTURING PROCESS" filed by the same Applicant, and
  • a plunger (4) with the general shape of a nail, with a head (5) and a shank (6), also featuring radial symmetry regarding the longitudinal axis of the projectile.
  • the external shape of the head (5) of the plunger (4) is such that the projectile presents in its unfired configuration an uninterrupted aerodynamic profile that is preserved after firing until the moment of impact.
  • the cross-section of the shank (6) of the plunger (4) is preferably that of a regular polyhedron with 3 to 8 sides, with contact between the elements occurring at the tips of the polyhedral figure, thus leaving a certain amount of free section between the shank (6) and the cylindrical shaft (3). This is important to facilitate the exhaustion of the air trapped inside the cylindrical shaft (3) and suddenly pressurized by the sinking of the shank (6) into it upon impact.
  • the maximum cross section radius of the shank (6) is slightly bigger than the nominal cross-section radius of the cylindrical shaft (3), with the penetration of the shank (6) into the shaft (3) being allowed by deformation of the plastic material of the plunger (4) under the force of the projectile impact. This serves the purpose of hindering the separation between the projectile body (1) and the plunger (4) after impact, achieving a press-fit between them.
  • one of the objects of the present invention is to disclose a projectile that easily and quickly deforms upon expansion when penetrating soft targets. That is preferably achieved by following the same cavity design guidelines described in PCT/BP04/000006, "LEAD-FREE MONOBLOC EXPANSION PROJECTILE AND MANUFACTURlNG PROCESS" filed by the same Applicant, including the preferential use of external slits around the open face of the specially designed cavity to foster the forming of a flower-shape element after impact.
  • the ideal design is such that the energy transfer to the targeted body should be performed by the whole projectile.
  • part of the energy will inevitably end up transferred to the plunger, in a direct proportion to its mass. Therefore it is advisable to make the plunger (4) mass much smaller that that of the projectile body (1), so that in the event of an accidental separation, the smallest possible amount of energy is transferred to the "stray" plunger (4) .
  • the mass of the plunger (4) is no more than 5% of the total mass of the projectile in its unfired configuration .
  • the reliance on the apparently fragile flower-shape pattern of the projectile to transfer energy to the target might suggest fragmentation is an issue.
  • the sequence of events from firing to final disposition of the projectile is as follows:
  • the projectile is fired, follows its external ballistic path and eventually hits its target.
  • the plunger (4) is forced inside by the pressure of the target against the external surface of the plunger head (5), which drives the whole plunger (4) towards the rear part of the projectile body (1).
  • the plunger (4) sinks into the projectile body (1), it leaves behind and thus exposes the expansion chamber (2), which is penetrated and filled up by target material . It is important to observe that the force that actually expands the expansion chamber (2) is the one caused by penetration of target material into it.
  • Another important aspect of the present invention is that upon sinking into the projectile body (1), no part of the plunger (4) head (5) touches the internal surface of the expansion chamber (2) except for the bottom of said chamber at the end of the course of the sinking movement, so that the plunger (4) has no active role in the expansion of the projectile upon impact.
  • the projectile body (1) material is preferably from the copper class or a copper alloy.
  • the material of the plunger (4) is preferably polyamide or polyethylene. This plastic material is resistant to breakage and yet somewhat flexible in view of the forces applied to the plunger (4). Alternatively, metallic powder can be added in the casting of the plunger (4) in order to make it magnetically traceable inlo the target after firing.
  • the manufacturing process includes the following sequence that is generally similar to the sequence described in PCT/BR04/000006, "LEAD-FREE MONOBLOC EXPANSION PROJECTILE AND MANUFACTURING PROCESS" filed by the same Applicant: obtaining a cylinder of soft material preferably from the copper class or copper alloy, by cutting a wire; forming the cavity in one or more operations, by cold forming, being the cylindrical shaft: (3) formed in the same operation of cold forming with the expansion chamber (2) or alternatively in a separate operation of cold forming, or alternatively by drilling.
  • the cylindrical shaft (3) is placed right behind the expansion chamber (2) and is continuously connected to it; forming the forward part of the piece obtained, in a die, also forming the slits (if required for the ammunition being manufactured) in the same operation, and annealing, polishing and cleaning the formed projectile . All these operations are well known by those skilled in the art of ammunition manufacture.
  • the basic approach of the manufacturing process according to the present invention eliminates the need for strict, repetitive and costly manufacturing process controls. Nevertheless, the possibility of major geometric and/or dimensional inconsistencies must be accounted for, and that is the reason for including this final calibration step.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

L’invention concerne un projectile à expansion alliant les avantages d’une pointe à structures pleine et creuse, présentant les caractéristiques balistiques initiales d’un projectile plein et les effets balistiques finaux (cible) d’un projectile à pointe creuse, sans risque d’introduction d’un corps étranger indésirable dans la cavité préalablement au tir, et éliminant également les éventuels problèmes de chargement entre le magasin et le fût du canon grâce à un procédé de fabrication simple. Selon l’invention, un plongeur (4) est initialement mis en place dans la chambre d’expansion (2) d’un projectile. Lorsque le plongeur s’enfonce dans le corps (1) du projectile, sa tête (5) ne vient pas au contact de la surface interne de la chambre d’expansion (2) mais vient au contact du fond de la chambre (2), si bien que le plongeur (4) n’intervient pas activement dans l’expansion du projectile au moment de l’impact.
EP05714402A 2005-03-17 2005-03-17 Projectile a expansion pour armes a feu Withdrawn EP1864077A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/BR2005/000035 WO2006096944A1 (fr) 2005-03-17 2005-03-17 Projectile a expansion pour armes a feu

Publications (1)

Publication Number Publication Date
EP1864077A1 true EP1864077A1 (fr) 2007-12-12

Family

ID=36991217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05714402A Withdrawn EP1864077A1 (fr) 2005-03-17 2005-03-17 Projectile a expansion pour armes a feu

Country Status (3)

Country Link
US (1) US20080314280A1 (fr)
EP (1) EP1864077A1 (fr)
WO (1) WO2006096944A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8567297B2 (en) 2010-09-21 2013-10-29 Adf, Llc Penetrator and method of manufacture same
US8789470B2 (en) * 2011-02-07 2014-07-29 Olin Corporation Segmenting slug
US20140026779A1 (en) * 2012-07-24 2014-01-30 Christopher A. Mekus Low Velocity Bullet for Pistols and other Handguns
US9354027B2 (en) 2013-10-24 2016-05-31 G2 Research Inc. Fragmenting projectile
US9797696B2 (en) 2014-08-14 2017-10-24 OATH Corporation Conic taper tip fracturing projectiles
US20160047638A1 (en) * 2014-08-14 2016-02-18 OATH Corporation Material based impact reactive projectiles
US10663271B2 (en) 2016-10-13 2020-05-26 G2 Research Inc. Predictably fragmenting projectiles having internally-arranged geometric features
US10690464B2 (en) 2017-04-28 2020-06-23 Vista Outdoor Operations Llc Cartridge with combined effects projectile
DE102017011359A1 (de) * 2017-12-08 2019-06-13 Ruag Ammotec Gmbh Intermediat zum Fertigen von Projektilen eines Deformationsgeschosses, Projektil, deformiertes Projektil, Werkzeug zum Fertigen des Intermediats und Verfahren zum Herstellen des Intermediats
WO2019236704A1 (fr) * 2018-06-05 2019-12-12 Norris Wayne Projectile présentant des caractéristiques d'expansion adaptatives

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US355653A (en) * 1887-01-04 Bullet
US3427976A (en) * 1966-10-19 1969-02-18 Singer General Precision Ordnance projectile
DE2530155A1 (de) * 1975-07-05 1977-02-03 Dynamit Nobel Ag Geschoss, insbesondere fuer faustfeuerwaffen und maschinenpistolen
GB1590600A (en) * 1976-10-30 1981-06-03 Dynamit Nobel Ag Bullet
DE3510343A1 (de) * 1985-03-22 1986-09-25 Hans-Ludwig 4773 Möhnesee Schirneker Bleifreies jagdgeschoss
US4665827A (en) * 1985-12-24 1987-05-19 Ellis Ii Robert K Expandable bullet
US4776279A (en) * 1987-09-17 1988-10-11 Pejsa Arthur J Expanding ballistic projectile
FR2673278B1 (fr) * 1991-02-26 1993-12-31 Giat Industries Projectile sous-calibre perforant fragmentable.
US6182574B1 (en) * 1999-05-17 2001-02-06 Gregory J. Giannoni Bullet
DE10010500A1 (de) * 2000-03-07 2001-09-13 Dynamit Nobel Ag Schadstoffreduziertes Deformationsgeschoß,vorzugsweise für Faustfeuerwaffen
EP1156297A1 (fr) * 2000-05-15 2001-11-21 SM Schweizerische Munitionsunternehmung AG Balle expansible et méthode de fabrication
US6837165B2 (en) * 2001-11-09 2005-01-04 Olin Corporation Bullet with spherical nose portion
FI112701B (fi) * 2002-04-15 2003-12-31 Nammo Lapua Oy Menetelmä luodin laajentamiseksi ja luoti
DE10317404A1 (de) * 2002-04-30 2003-11-13 Ruag Ammotec Gmbh Teilzerlegungs- und Deformationsgeschosse mit identischer Treffpunktlage
AU2003233202B2 (en) * 2002-04-30 2009-04-23 Ruag Ammotec Gmbh Partial fragmentation and deformation bullets having an identical point of impact
ITMI20021869A1 (it) * 2002-08-30 2004-02-29 Fiocchi Munizioni Spa Pallottola ad espansione controllata.
CN1914479A (zh) * 2004-02-06 2007-02-14 卡图休斯巴西公司 无铅整体膨胀射弹以及制造方法
US7360491B2 (en) * 2004-04-12 2008-04-22 Sanborn Craig M Firearm projectile apparatus, method, and product by process
US9562753B2 (en) * 2004-12-13 2017-02-07 Olin Corporation Upset jacketed bullets
US20060124022A1 (en) * 2004-12-13 2006-06-15 Olin Corporation, A Corporation Of The State Of Virginia Firearm projectile with bonded rear core
US7380502B2 (en) * 2005-05-16 2008-06-03 Hornady Manufacturing Company Rifle cartridge with bullet having resilient pointed tip

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006096944A1 *

Also Published As

Publication number Publication date
US20080314280A1 (en) 2008-12-25
WO2006096944A1 (fr) 2006-09-21

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