EP1355119A1 - Method for expanding a bullet and expandable bullet - Google Patents
Method for expanding a bullet and expandable bullet Download PDFInfo
- Publication number
- EP1355119A1 EP1355119A1 EP03100967A EP03100967A EP1355119A1 EP 1355119 A1 EP1355119 A1 EP 1355119A1 EP 03100967 A EP03100967 A EP 03100967A EP 03100967 A EP03100967 A EP 03100967A EP 1355119 A1 EP1355119 A1 EP 1355119A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bullet
- cavity
- point
- sealing surface
- filling agent
- 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- Withdrawn
Links
Images
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
- the present invention relates to a method according to the preamble of claim 1 for expanding a bullet and to a bullet according to the preamble of claim 2.
- This type of bullet is used especially in hunting or other type of shooting, in which the expansion of the bullet is important.
- the bullet point begins to strongly expand immediately the bullet hits its target, for example the skin of a game animal.
- This action of the bullet does, however, often cause the surface muscles of the game animal to crush. As a result, this damage caused by the bullet makes part of the felled game animal inedible.
- the bullets on the market also often have a very narrow operating range in view of their rate of travel. This means that a bullet shot at a lower rate of travel does not open properly when it hits the target, but on the other hand, higher rates of travel make the bullet burst into pieces as it hits the target. In both cases, the operation of the bullet results in that the animal dies slowly.
- the basic idea of the invention is to provide a bullet body made of copper or some other soft, but high-tensile metal and having a hollow cavity or recess.
- a point piece made of plastic or the like can be arranged in this hollow space.
- the specific design of the body and the point piece arranged in the hollow space produces a bullet with steady flight properties, but which expands effectively when it hits the target.
- the method and bullet of the present invention are suitable for use both in hunting and in other shooting.
- the bullet is also suitable for both rifle and pistol shooting.
- the present method for expanding the point of a bullet then preferably comprises a bullet described later in more detail and having a substantially cylindrical body 1 and a substantially conically convergent point 2.
- a cavity 4 is arranged to extend from the point towards the base 3 of the bullet, and the cavity is at least partly filled with a filling agent 5.
- the filling agent 5 presses into the cavity 4 due to the force action between the bullet and target and guided by the sealing surface 6.
- the filling agent pressing into the cavity also frees the point of the bullet for the force action directed to it by the target and speeds up the expansion of the bullet.
- the filling agent when pressing into the cavity, also expands the bullet at its opening in the cavity. This way, the expanding point of the bullet is subjected to an ever-increasing force action directed by the target to the bullet and speeding up the final expansion of the bullet.
- the extent and rate of the expansion of the bullet can be significantly adjusted by selecting a different length and/or diameter for the cavity.
- the shape of the sealing surface and the material of the bullet body can also be used to influence the expansion of the bullet.
- Attached Figure 1 shows a preferred embodiment of the bullet, in which the bullet comprises a substantially cylindrical body 1 and a conically convergent point 2 made of copper, for instance, or by combining several materials.
- a preferably cylindrical cavity 4 is arranged to extend from the point of the bullet towards the base 3 of the bullet.
- the diameter and length of the cavity vary strongly depending on the use of the bullet, the gun type and calibre.
- the diameter of the cavity can be 20 to 60% of the diameter of the body.
- the length of the cavity can in turn vary between 5 and 48% of the entire length of the bullet.
- This cavity 4 is arranged to receive a filling agent 5 that fills it at least partly.
- the filling agent often comprises a separate stopper-like piece made especially for this purpose and is referred to as point piece hereafter.
- the length of the point piece also affects the properties of the bullet and is preferably 15 to 90% in relation to the length of the cavity.
- This filling agent preferably comprises a plastic material, but may also comprise a combination of several materials.
- a sealing surface 6 is formed at the point 2 of the bullet between the cavity 4 and the point piece 5.
- An essential feature of the sealing surface is its conical shape, whereby the sealing surface expands towards the point of the bullet.
- the angle ⁇ between the sealing surface and the longitudinal axis 7 of the bullet is in the range of 10° to 80°, preferably about 45°. Because the point piece forms the outermost section of the point of the bullet, it extends beyond the cylindrical walls of the cavity and can be described as a mushroom with a small pileus, for instance.
- the positioning of the sealing surface can also be used to affect the behaviour of the bullet.
- the sealing surface has a diameter that can vary between 30 to 90% of the diameter of the body of the bullet, and the selected diameter of the sealing surface defines its positioning in relation to the cylindrical body 1.
- Attached Figure 2 shows a second alternative embodiment of the bullet that differs from the embodiment of Figure 1 in the structure of the sealing surface 6 at the point 2 of the bullet.
- the conical shape of the sealing surface 6 is arranged to extend from the edge of the cavity 4 to the outer jacket 8 of the bullet.
- the sealing surface of the bullet comprises, however, not only the conical surface 6 but also a cylindrical section 9 that is substantially parallel to the longitudinal axis 7 of the bullet.
- This type of cylindrical section is conventionally only 0.1 to 2.0 mm in size.
- the length of the cylindrical section is most preferably about 0.5 mm. It is, however, possible to make a bullet in which this cylindrical section is as much as 50% of the length of the bullet.
- the point piece in this embodiment of Figure 2 also forms the outermost section of the point of the bullet, the point piece extends beyond the cylindrical walls of the cavity in this case, too. Due to the cylindrical section of the sealing surface, a filling agent aggregation that is significant in mass and especially in volume is this way formed on the outer edge of the cavity.
- FIG. 3 shows a third alternative embodiment of the bullet that also differs from the embodiments of Figures 1 and 2 in the structure of the sealing surface 6 at the point 2 of the bullet.
- the sealing surface 6 in the embodiment of Figure 3 comprises both the conical section of Figure 1 and a planar surface 10 perpendicular to the longitudinal axis 7 of the bullet. This planar surface combines the conical section of the sealing surface to the outer jacket 8 of the bullet.
- the present bullet may naturally also comprise any obvious combination of the presented embodiments.
- the point piece 5 when hitting the target, makes the bullet expand more effectively than usually by pushing into the cavity 4 and pressing the inner walls 11 in the cavity away from each other.
- Figures 3, 4 and 5 show schematically how the bullet expands when it hits and pushes into the target.
- the point pieces push into the cavity 4 of the bullet sliding along the sealing surface 6 of the bullet when the bullet hits a targeted game animal, for instance.
- the sealing surface 6 of the bullet and the point piece 5 in the cavity prevent the fluid and muscle mass in the tissues of the game animal from entering the cavity 4, as a result of which the bullet pushes quite deep into the target.
- the pushing of the wedge-like point piece into the cavity due to the impact changes the shape of the point of the bullet as shown in Figure 4. As the bullet enters more deeply into the target, the point piece also pushes deeper into the cavity.
- the present bullet provides an inlet wound with only a little crushing and the transfer of the high kinetic energy of the bullet to the inner organs.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Toys (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20020167U FI5551U1 (fi) | 2002-04-15 | 2002-04-15 | Venttiili luoti |
FI20020167U | 2002-04-15 | ||
FI20021196A FI112701B (fi) | 2002-04-15 | 2002-06-19 | Menetelmä luodin laajentamiseksi ja luoti |
FI20021196 | 2002-06-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1355119A1 true EP1355119A1 (en) | 2003-10-22 |
Family
ID=26161278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03100967A Withdrawn EP1355119A1 (en) | 2002-04-15 | 2003-04-10 | Method for expanding a bullet and expandable bullet |
Country Status (3)
Country | Link |
---|---|
US (1) | US20040003747A1 (fi) |
EP (1) | EP1355119A1 (fi) |
FI (1) | FI112701B (fi) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006096944A1 (en) * | 2005-03-17 | 2006-09-21 | Cbc Companhia Brasileira De Cartuchos | Expansion projectile for firearms |
WO2013086544A3 (en) * | 2011-12-07 | 2013-08-01 | Sme Engineering (Pty) Ltd | A bullet |
WO2014135752A1 (en) | 2013-03-08 | 2014-09-12 | Nurminen Vesa | Bullet and method for expanding a bullet |
WO2015118173A1 (de) * | 2014-02-10 | 2015-08-13 | Ruag Ammotec Gmbh | Pb-freies deformations-teilzerlegungsgeschoss mit einem definierten aufpilz- und zerlegungsverhalten |
WO2021170899A1 (en) | 2020-02-28 | 2021-09-02 | Sako Oy | Bullet |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7373887B2 (en) * | 2006-07-01 | 2008-05-20 | Jason Stewart Jackson | Expanding projectile |
US7966937B1 (en) | 2006-07-01 | 2011-06-28 | Jason Stewart Jackson | Non-newtonian projectile |
DE102014224715B4 (de) * | 2014-10-29 | 2019-07-11 | Metallwerk Elisenhütte GmbH | Unterschallpatrone mit einem Geschoss sowie Geschoss für eine solche |
US11313657B1 (en) * | 2016-11-14 | 2022-04-26 | Erik Agazim | Multi-piece projectile with an insert formed via a powder metallurgy process |
US10914560B2 (en) * | 2018-10-30 | 2021-02-09 | Olin Corporation | Hollow point bullet |
US11428517B2 (en) | 2019-09-20 | 2022-08-30 | Npee L.C. | Projectile with insert |
DE102020116589A1 (de) * | 2020-06-24 | 2021-12-30 | Rheinmetall Waffe Munition Gmbh | Penetrator, Verwendung eines Penetrators und Geschoss |
DE102021104760A1 (de) * | 2021-02-26 | 2022-09-01 | Ruag Ammotec Ag | Deformationsgeschoss für Polizei- und Behördenmunition |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2843167A1 (de) * | 1978-10-04 | 1980-04-17 | Schirnecker Hans Ludwig | Geschoss, insbesondere jagdgeschoss |
DE2909471A1 (de) * | 1979-03-10 | 1980-09-11 | Schirnecker Hans Ludwig | Geschoss, beispielsweise fuer jagdzwecke, und verfahren zu seiner herstellung |
US4655140A (en) * | 1979-03-10 | 1987-04-07 | Schirnecker Hans Ludwig | Projectile, for example for hunting purposes, and process for its manufacture |
DE3840165A1 (de) * | 1988-06-06 | 1990-07-05 | Schirnecker Hans Ludwig | Vielfachgeschoss |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1094395A (en) * | 1914-02-17 | 1914-04-21 | Jan Willem Peppelman Van Kampen | Universal rifle-projectile. |
US1447478A (en) * | 1921-07-05 | 1923-03-06 | Emil J Koshollek | Bullet |
US2123981A (en) * | 1935-09-28 | 1938-07-19 | Remington Arms Co Inc | Ammunition |
US3003420A (en) * | 1956-10-01 | 1961-10-10 | Nosler Partition Bullet Compan | Partition bullets |
US4044685A (en) * | 1971-06-18 | 1977-08-30 | Hirtenberger Patronen-, Zundhutchen- Und Metallwarenfabrik Aktiengesellschaft | Jacketless hunting bullet with roll-back cutting flags |
DE2530155A1 (de) * | 1975-07-05 | 1977-02-03 | Dynamit Nobel Ag | Geschoss, insbesondere fuer faustfeuerwaffen und maschinenpistolen |
US4793037A (en) * | 1987-02-06 | 1988-12-27 | Carter Herman L | Method of making a bullet |
US4879953A (en) * | 1987-02-06 | 1989-11-14 | Carter Herman L | Bullet |
US4776279A (en) * | 1987-09-17 | 1988-10-11 | Pejsa Arthur J | Expanding ballistic projectile |
DE3838584A1 (de) * | 1988-11-14 | 1990-05-23 | Karl Klaus Mayer | Geschoss der deformations-klasse, fuer jagd - buechsenpatronen |
US5185495A (en) * | 1992-04-13 | 1993-02-09 | Petrovich Robert M | Projective with improved flowering |
US5404815A (en) * | 1993-08-20 | 1995-04-11 | Swift Bullet Company | Bullet and process for making same |
US5621186A (en) * | 1995-09-20 | 1997-04-15 | Trophy Bonded Bullets, Inc. | Bullet |
US6105506A (en) * | 1997-09-23 | 2000-08-22 | Antonio C. Gangale | Sabot slug for shotgun |
US6244187B1 (en) * | 1999-07-01 | 2001-06-12 | Federal Cartridge Company | Increased velocity-performance-range bullet |
-
2002
- 2002-06-19 FI FI20021196A patent/FI112701B/fi not_active IP Right Cessation
-
2003
- 2003-04-10 EP EP03100967A patent/EP1355119A1/en not_active Withdrawn
- 2003-04-14 US US10/412,386 patent/US20040003747A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2843167A1 (de) * | 1978-10-04 | 1980-04-17 | Schirnecker Hans Ludwig | Geschoss, insbesondere jagdgeschoss |
DE2909471A1 (de) * | 1979-03-10 | 1980-09-11 | Schirnecker Hans Ludwig | Geschoss, beispielsweise fuer jagdzwecke, und verfahren zu seiner herstellung |
US4655140A (en) * | 1979-03-10 | 1987-04-07 | Schirnecker Hans Ludwig | Projectile, for example for hunting purposes, and process for its manufacture |
DE3840165A1 (de) * | 1988-06-06 | 1990-07-05 | Schirnecker Hans Ludwig | Vielfachgeschoss |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006096944A1 (en) * | 2005-03-17 | 2006-09-21 | Cbc Companhia Brasileira De Cartuchos | Expansion projectile for firearms |
WO2013086544A3 (en) * | 2011-12-07 | 2013-08-01 | Sme Engineering (Pty) Ltd | A bullet |
US9316468B2 (en) | 2011-12-07 | 2016-04-19 | Sme Engineering (Pty) Ltd | Bullet |
WO2014135752A1 (en) | 2013-03-08 | 2014-09-12 | Nurminen Vesa | Bullet and method for expanding a bullet |
WO2015118173A1 (de) * | 2014-02-10 | 2015-08-13 | Ruag Ammotec Gmbh | Pb-freies deformations-teilzerlegungsgeschoss mit einem definierten aufpilz- und zerlegungsverhalten |
US11199386B2 (en) | 2014-02-10 | 2021-12-14 | Ruag Ammotec Ag | PB-free deforming/partially fragmenting projectile with a defined mushrooming and fragmenting behavior |
WO2021170899A1 (en) | 2020-02-28 | 2021-09-02 | Sako Oy | Bullet |
Also Published As
Publication number | Publication date |
---|---|
FI20021196A (fi) | 2003-10-16 |
US20040003747A1 (en) | 2004-01-08 |
FI20021196A0 (fi) | 2002-06-19 |
FI112701B (fi) | 2003-12-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
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17P | Request for examination filed |
Effective date: 20040227 |
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AKX | Designation fees paid |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20051226 |