EP2965038A1 - Geschoss und verfahren zum aufpilzen eines geschosses - Google Patents

Geschoss und verfahren zum aufpilzen eines geschosses

Info

Publication number
EP2965038A1
EP2965038A1 EP14759990.6A EP14759990A EP2965038A1 EP 2965038 A1 EP2965038 A1 EP 2965038A1 EP 14759990 A EP14759990 A EP 14759990A EP 2965038 A1 EP2965038 A1 EP 2965038A1
Authority
EP
European Patent Office
Prior art keywords
bullet
nose
cavity
diameter
mushrooming
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.)
Granted
Application number
EP14759990.6A
Other languages
English (en)
French (fr)
Other versions
EP2965038B1 (de
EP2965038A4 (de
Inventor
Vesa NURMINEN
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 EP2965038A1 publication Critical patent/EP2965038A1/de
Publication of EP2965038A4 publication Critical patent/EP2965038A4/de
Application granted granted Critical
Publication of EP2965038B1 publication Critical patent/EP2965038B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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

  • the present invention relates to a bullet according to the preamble of claim 1 and a method according to the preamble of claim 6 for providing the expansion of a bullet when it hits its target.
  • This type of bullet is especially well suited for hunting big game, where it is important that the bullet expands, but it is also necessary to avoid excessive fragmentation of the bullet.
  • the cavitation bubble generated by the bullet also makes its advancement instable, because the cavitation bubble prevents the tissue mass it penetrates from supporting the bullet on the sides.
  • the centre of gravity of the bullet is in the advancing direction behind the midpoint, whereby the offset of the bullet from its direction of travel generates two force components that annul the gyro force caused by the axial rotation of the bullet. Pressure from the surrounding tissue mass will be directed to a part of the side surface of a bullet diverging from its direction, while the moment of the centre of gravity of the bullet increases in relation to the midpoint.
  • the bullet rotates around its longitudinal axis, which results in an unforeseeable direction of travel and a very small penetration.
  • the bullet of the invention is mainly characterised by what is stated in the characterising part of claim 1.
  • the method of the invention is, in turn, mainly characterised by what is stated in the characterising part of claim 6.
  • the basic idea of the invention is to provide a cylindrical solid-material bullet that has good ballistic properties and that as a result of an impact turns into a substantially blunt-nosed bullet, however, with clearly less mushrooming in comparison with the earlier bullets.
  • This type of substantially blunt-nosed or slightly concave- nosed bullet provides an as short displacement time of tissue mass as possible in the targeted game animal due to the substantially planar surface formed on the nose of the bullet.
  • a blunt-nosed or slightly concave bullet generates a strong blast wave as it advances in the tissue mass.
  • the small surface area of the nose of the bullet impacting the tissue mass leads to a low advancing resistance and high penetration of the bullet.
  • Such a bullet according to the invention displaces tissue mass rapidly, in which case the strong blast wave it generates has the strongest effect on liquid-containing tissues, such as lungs. As the cavitation bubble formed by the bullet in the muscle tissue is smaller than before, tissue damage to the muscle mass also remain smaller than before.
  • Figure 1 is a schematic representation of cavitation bubbles generated by a strongly mushrooming bullet and by a bullet of the invention
  • Figure 2 shows the penetration of a bullet according to an embodiment of the invention in conducted test firings
  • Figure 3 shows a side view of a bullet according to an embodiment of the invention
  • Figure 4 shows the nose of the bullet of Figure 3 partially and schematically cut
  • Figure 5 shows another schematic cross-section of the nose of the bullet of Figure 3.
  • Figures 6 to 9 show the operation of a bullet according to the invention in a situation after impact.
  • the starting point was to create a bullet 1 that combines good terminal ballistics, minor flesh damage regardless of the impact, good feed reliability in all weapons, even in semiau- tomatics, and sufficient external ballistics and muzzle velocity so as to achieve a firing distance of at least 300 m with so-called normal calibres.
  • the above goals are achieved by a solid-material bullet that does not have a separate plastic nose that could bend, detach or cause imbalance.
  • the bullet 1 also has a longish smooth nose 2 that is sufficiently small to achieve reliable feed and good external ballistics in the weapon.
  • the pressure F directed to it is adapted to act on the mushrooming of the nose 2, whereby a mushroom 5 forms on the nose and preferably reaches a size that is at most 1.2 x the diameter of the bullet body.
  • the cavity provided on the nose of the bullet is clearly shorter in total length l_i than the calibre of the bullet, that is, in small calibres (approximately 6 to 7 mm in hunting) it is at most 70% of the calibre, and in large calibres (approximately 11 to 12 mm in hunting) it is approximately 40% of the calibre. It has also been detected that when forming the cavity 4 of several cavity parts 6 and 7, it is advantageous to arrange the last cavity to be clearly shorter than the previous one. Thus, Li - 1_ 2 » L 2 . Such a last part of the cavity can also be made to narrow conically.
  • each cavity part 6 and 7 By making the diameter of each cavity part 6 and 7 smaller than the preceding one in the direction away from the outermost tip, it is possible to control the fragmenting of the created mushrooms 5a and 5b.
  • the bullet 1 according to Figure 4 behaves in the manner shown in Figures 6 to 9.
  • the first mushrooming takes place in the bullet right after is has hit its target. See the mushroom 5a in the figures.
  • the mushrooming is caused by tissue mass that presses by force F into the cavity 4 in the bullet. As the bullet presses into the tissue mass, it mushrooms naturally at a point where the material strengths of the nose 2 are the smallest, i.e. in the figure, this is the step-shaped point 8, in which two consecutive cavity parts 6 and 7 meet.
  • the mushrooming comprises both bending of the material surrounding the cavity part 6 and stretching of the material neck 9 at the step-shaped point 8, see Figure 7.
  • the mushrooming is also assisted by a sufficient difference in the diameters d of consecutive cavity parts, when these are used. When the difference is too small, consecutive mushrooming cannot take place, and the mushrooming extends immediately over the entire length Li of the cavity 4. Thus, reliable effectuation of consecutive mushrooming requires that d 2 «di.
  • the fragmenting of the mushroom 5a produced on the nose 2 of the bullet 1 can also be assisted by arranging a shoulder 10 according to Figure 5 or some other discontinuity area of the surface arc of the bullet on the nose of the bullet essentially at the boundary of each consecutive cavity part.
  • This type of shoulder reduces the material strength of the area and assists in a natural manner the fragmenting of the mushroom.
  • This type of shoulder to be formed on the outer surface of the nose in accordance with Figure 5 can also be replaced by a weakening 10 of a groove-like material neck 9 formed at the bottom of a cavity provided on the nose and/or at the joint of consecutive cavities.
  • the bullet 1 of a solid material it is advantageous to arrange at least two parallel grooves 13 on a jacket 12 of the body 11 of the bullet, in the area outside the nose, to prevent excessive pressure from forming in the barrel of the firing weapon.
  • a preferred embodiment for said solid material and, thus, for the body of the bullet is brass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP14759990.6A 2013-03-08 2014-03-06 Geschoss Not-in-force EP2965038B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20135220A FI126940B (fi) 2013-03-08 2013-03-08 Luoti ja menetelmä luodin laajentamiseksi sienettymällä
PCT/FI2014/050165 WO2014135752A1 (en) 2013-03-08 2014-03-06 Bullet and method for expanding a bullet

Publications (3)

Publication Number Publication Date
EP2965038A1 true EP2965038A1 (de) 2016-01-13
EP2965038A4 EP2965038A4 (de) 2016-10-19
EP2965038B1 EP2965038B1 (de) 2018-05-16

Family

ID=51490678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14759990.6A Not-in-force EP2965038B1 (de) 2013-03-08 2014-03-06 Geschoss

Country Status (4)

Country Link
US (1) US20160025469A1 (de)
EP (1) EP2965038B1 (de)
FI (1) FI126940B (de)
WO (1) WO2014135752A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021170899A1 (en) 2020-02-28 2021-09-02 Sako Oy Bullet
EP4105593A1 (de) 2021-06-14 2022-12-21 Sako OY Unterschall, expansions- und bleifreies projektil

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9534876B2 (en) * 2013-05-28 2017-01-03 Ra Brands, L.L.C. Projectile and mold to cast projectile
US11268791B1 (en) 2014-05-23 2022-03-08 Vista Outdoor Operations Llc Handgun cartridge with shear groove bullet
US10345085B2 (en) 2017-01-20 2019-07-09 Lehigh Defense, LLC Projectile having leading surface standoffs
USD853519S1 (en) 2017-09-14 2019-07-09 F. Richard Langner Piston for driving water out a disrupter
USD852922S1 (en) * 2017-09-14 2019-07-02 F. Richard Langner Slug for launching from a disruptor
USD877848S1 (en) * 2017-09-20 2020-03-10 Skychase Holdings Corporation Bullet
US20190120603A1 (en) * 2017-10-19 2019-04-25 Richard C. Cole Projectile with radial grooves
WO2020019005A1 (en) 2018-07-16 2020-01-23 Mendes Fernando Ferreira Bullet
USD898861S1 (en) * 2019-06-18 2020-10-13 Sinterfire, Inc. Projectile
IT202200006401A1 (it) * 2022-03-31 2023-10-01 Donati Spa Pallottola con punta sferica

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1023469A (en) * 1911-08-22 1912-04-16 John D S Haslett Cartridge.
US1080974A (en) * 1913-09-08 1913-12-09 Winchester Repeating Arms Co Mushroom-bullet.
US1080977A (en) * 1913-09-13 1913-12-09 Winchester Repeating Arms Co Mushroom-bullet.
US1493614A (en) * 1920-09-01 1924-05-13 Remington Arms Co Inc Mushroom bullet
GB1590600A (en) * 1976-10-30 1981-06-03 Dynamit Nobel Ag Bullet
DE2909471A1 (de) * 1979-03-10 1980-09-11 Schirnecker Hans Ludwig Geschoss, beispielsweise fuer jagdzwecke, und verfahren zu seiner herstellung
US5099765A (en) * 1991-02-25 1992-03-31 Czetto Jr Paul High penetration bullet
US5097768A (en) * 1991-03-11 1992-03-24 Petrovich Paul A Petalling projectile
US6016754A (en) * 1997-12-18 2000-01-25 Olin Corporation Lead-free tin projectile
DE19930475A1 (de) * 1999-07-01 2001-01-04 Dynamit Nobel Ag Teilzerlegungsgeschoß
US6694888B2 (en) * 2001-10-02 2004-02-24 Bill Jopson Frangible bullet
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
WO2003093758A1 (de) * 2002-04-30 2003-11-13 Ruag Ammotec Gmbh Teilzerlegungs- und deformationsgeschosse mit identischer treffpunktlage
US20040244629A1 (en) * 2002-09-25 2004-12-09 Bill Jopson Frangible bullet
DE10325547B4 (de) * 2003-06-05 2005-06-23 Heckler & Koch Gmbh Hohlspitzgeschoss
US20060124022A1 (en) * 2004-12-13 2006-06-15 Olin Corporation, A Corporation Of The State Of Virginia Firearm projectile with bonded rear core
US8186277B1 (en) * 2007-04-11 2012-05-29 Nosler, Inc. Lead-free bullet for use in a wide range of impact velocities

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021170899A1 (en) 2020-02-28 2021-09-02 Sako Oy Bullet
US12085370B2 (en) 2020-02-28 2024-09-10 Sako Oy Bullet
EP4105593A1 (de) 2021-06-14 2022-12-21 Sako OY Unterschall, expansions- und bleifreies projektil

Also Published As

Publication number Publication date
FI20135220A (fi) 2014-09-09
EP2965038B1 (de) 2018-05-16
FI126940B (fi) 2017-08-15
EP2965038A4 (de) 2016-10-19
US20160025469A1 (en) 2016-01-28
WO2014135752A1 (en) 2014-09-12

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