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EP0150229B1 - Bullet - Google Patents

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Publication number
EP0150229B1
EP0150229B1 EP84100331A EP84100331A EP0150229B1 EP 0150229 B1 EP0150229 B1 EP 0150229B1 EP 84100331 A EP84100331 A EP 84100331A EP 84100331 A EP84100331 A EP 84100331A EP 0150229 B1 EP0150229 B1 EP 0150229B1
Authority
EP
European Patent Office
Prior art keywords
slug
grooves
spherical bodies
bullet
section
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.)
Expired
Application number
EP84100331A
Other languages
German (de)
French (fr)
Other versions
EP0150229A1 (en
Inventor
Leroy James Sullivan
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.)
Branscomb Corp NV
Original Assignee
Branscomb Corp NV
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
Priority to DE8484100331T priority Critical patent/DE3475730D1/en
Application filed by Branscomb Corp NV filed Critical Branscomb Corp NV
Priority to EP84100331A priority patent/EP0150229B1/en
Priority to AT84100331T priority patent/ATE39386T1/en
Priority to AT84106760T priority patent/ATE42400T1/en
Priority to HU842985A priority patent/HU192037B/en
Priority to PCT/EP1984/000174 priority patent/WO1985000218A1/en
Priority to AU31005/84A priority patent/AU578029B2/en
Priority to EP84106760A priority patent/EP0129777B1/en
Priority to DE8484106760T priority patent/DE3477835D1/en
Priority to BR8406941A priority patent/BR8406941A/en
Priority to HU845419A priority patent/HU197441B/en
Priority to US06/621,735 priority patent/US4644866A/en
Priority to IL9437884A priority patent/IL94378A/en
Priority to CA000457266A priority patent/CA1278952C/en
Priority to KR1019840003532A priority patent/KR870002025B1/en
Priority to ES1984287861U priority patent/ES287861Y/en
Priority to NO850702A priority patent/NO160274C/en
Priority to DK079585A priority patent/DK163378C/en
Publication of EP0150229A1 publication Critical patent/EP0150229A1/en
Priority to ES1985291322U priority patent/ES291322Y/en
Priority to ES1985291320U priority patent/ES291320Y/en
Priority to ES1985291319U priority patent/ES291319Y/en
Priority to ES1985291321U priority patent/ES291321Y/en
Priority to US06/902,297 priority patent/US4700630A/en
Priority to US07/078,549 priority patent/US4829904A/en
Priority to NO883792A priority patent/NO170440C/en
Application granted granted Critical
Publication of EP0150229B1 publication Critical patent/EP0150229B1/en
Priority to IL94378A priority patent/IL94378A0/en
Priority to FI903702A priority patent/FI903702A0/en
Priority to DK113391A priority patent/DK113391A/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B7/00—Shotgun ammunition
    • F42B7/02—Cartridges, i.e. cases with propellant charge and missile
    • F42B7/10—Ball or slug shotgun cartridges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/02—Stabilising arrangements
    • F42B10/22—Projectiles of cannelured type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/02—Driving bands; Rotating bands
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor

Definitions

  • the present invention relates to ammunition and is particularly useful in ammunition for use in conventional small arms weapons having non- rifled barrels.
  • a novel ammunition round comprising a casing for containing a propelling charge, a substantially full bore slug of ogival shape and a plurality of elongate elements preventing the slug from tilting off axis as it travels down a barrel, characterized in that the slug has a plurality of grooves in its outer surface extending substantially along the longitudinal axis of the slug, the elongate elements being seated in the grooves and having a dimension substantially the same as the radial depth of the grooves and extending substantially the length of the slug.
  • DE-C-583098 discloses a slug or bullet which has a star-shaped rear portion which is attached to the ogival front portion of the slug and which has a plurality of V-shaped grooves.
  • the grooves are located tubular elongate elements.
  • the tubular elements significantly increase the overall diameter of the composite projectile, causing the slug to be undersized.
  • the elements are secondary projectiles and extend longitudinally only over the length of the rear attachment portion.
  • FR-A-1124740 discloses a shotgun slug in accordance with the preamble of claim 1 with plural secondary projectiles in the form of spherical pellets which are housed in U-shaped grooves formed in the sides of a round-nosed, parallel- sided slug.
  • the secondary projectiles can be located in a hollowed out portion of the slug.
  • an ammunition round comprises a slug which has a plurality of grooves in its outer surface, each of the grooves being substantially "U” shaped in cross section and containing a plurality of spherical bodies arranged in rows in each of the grooves, characterized in that the slug is of ogival shape that the grooves extend helically around or substantially parallel to the longitudinal axis of the slug, and that the spherical bodies have a diameter substantially equal to that of the cross-section of the grooves to support and stabilize the slug in a barrel through which it is fired.
  • the ammunition of the invention is intended for use primarily as a shotgun slug and the bullet or slug may be made of steel or, as conventional, of lead.
  • the spherical bodies lying in the grooves may be formed of steel, plastics or any other suitable material.
  • the slug will preferably be formed of lead, for use e.g. when deer hunting, with a normal shotgun.
  • a military version would be formed of steel, with steel balls in the grooves, thus additionally providing a multiple projectile round.
  • the balls scatter like a shotgun for short range and the central streamlined projectile has long range energy and accuracy, so the round can be used as in applications normally requiring a rifle.
  • the flutes or grooves reduce frontal area and wind resistance to aid streamlining and form fins to help stabilize the slug in flight.
  • the balls in the grooves prevent the streamlined slug, with its ogival shape, from tilting in the barrel.
  • Normal shotgun slugs as for example, shown in the prior art referred to above, have a cylindrical shape which prevents tilting, but are not streamlined.
  • the balls stabilize the slug and separate from it equally well whether the grooves are helical or parallel to the axis of the slug, but if they are helical then windflow through the grooves after separation of the balls begins to spin the slug and stabilize its flight to improve accuracy.
  • a steel slug 1 of conventional ogival outline has four helical flutes 2 equiangularly positioned around its central axis 3.
  • four spherical bodies 4 are positioned, each of the spherical bodies 4 having a diameter substantially the same as although slightly less than the diameter of the cross-section of the flute 2.
  • the spherical bodies are also preferably made of steel and may be conventional ball bearings.
  • the circular sectioned wall of the flutes 2 supports the spherical bodies 4 which are retained within the flutes 2 in the radial direction, prior to firing by the wall of the casing, and after firing by the wall of the barrel.
  • the rear of the slug 1 may be abutted by a plug (not shown) in order to provide a satisfactory seal to the casing (not shown) to prevent the blast from the explosion of the charge passing around the sides of the slug.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Glanulating (AREA)
  • Golf Clubs (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

A bullet or slug having helical flutes or grooves (2) of a "U" shaped cross-section having a plurality of spherical bodies (4) positioned in each groove to stabilize the bullet or slug as it passes down the non-rifled barrel through which it is fired.

Description

  • The present invention relates to ammunition and is particularly useful in ammunition for use in conventional small arms weapons having non- rifled barrels.
  • In our European application publication no. 0129608 there is described a novel ammunition round comprising a casing for containing a propelling charge, a substantially full bore slug of ogival shape and a plurality of elongate elements preventing the slug from tilting off axis as it travels down a barrel, characterized in that the slug has a plurality of grooves in its outer surface extending substantially along the longitudinal axis of the slug, the elongate elements being seated in the grooves and having a dimension substantially the same as the radial depth of the grooves and extending substantially the length of the slug.
  • DE-C-583098 discloses a slug or bullet which has a star-shaped rear portion which is attached to the ogival front portion of the slug and which has a plurality of V-shaped grooves. In the grooves are located tubular elongate elements. As can be seen from Figures 2 and 3 of that specification the tubular elements significantly increase the overall diameter of the composite projectile, causing the slug to be undersized. The elements are secondary projectiles and extend longitudinally only over the length of the rear attachment portion.
  • FR-A-1124740 discloses a shotgun slug in accordance with the preamble of claim 1 with plural secondary projectiles in the form of spherical pellets which are housed in U-shaped grooves formed in the sides of a round-nosed, parallel- sided slug. Alternatively, the secondary projectiles can be located in a hollowed out portion of the slug.
  • According to the present invention, an ammunition round comprises a slug which has a plurality of grooves in its outer surface, each of the grooves being substantially "U" shaped in cross section and containing a plurality of spherical bodies arranged in rows in each of the grooves, characterized in that the slug is of ogival shape that the grooves extend helically around or substantially parallel to the longitudinal axis of the slug, and that the spherical bodies have a diameter substantially equal to that of the cross-section of the grooves to support and stabilize the slug in a barrel through which it is fired.
  • The ammunition of the invention is intended for use primarily as a shotgun slug and the bullet or slug may be made of steel or, as conventional, of lead. The spherical bodies lying in the grooves may be formed of steel, plastics or any other suitable material.
  • For civilian use the slug will preferably be formed of lead, for use e.g. when deer hunting, with a normal shotgun.
  • A military version would be formed of steel, with steel balls in the grooves, thus additionally providing a multiple projectile round. The balls scatter like a shotgun for short range and the central streamlined projectile has long range energy and accuracy, so the round can be used as in applications normally requiring a rifle.
  • As in my above European application the flutes or grooves reduce frontal area and wind resistance to aid streamlining and form fins to help stabilize the slug in flight. The balls in the grooves prevent the streamlined slug, with its ogival shape, from tilting in the barrel. Normal shotgun slugs, as for example, shown in the prior art referred to above, have a cylindrical shape which prevents tilting, but are not streamlined.
  • The balls stabilize the slug and separate from it equally well whether the grooves are helical or parallel to the axis of the slug, but if they are helical then windflow through the grooves after separation of the balls begins to spin the slug and stabilize its flight to improve accuracy.
  • One example of a slug for an ammunition round according to the present invention is now described with reference to the accompanying drawings in which:
    • Fig. 1 is a side elevation of the slug itself,
    • Fig. 2 is a side elevation of the slug with the spherical bodies mounted on it, and
    • Fig. 3 is an end elevation on arrow A in Fig. 2.
  • A steel slug 1 of conventional ogival outline has four helical flutes 2 equiangularly positioned around its central axis 3. In each of the grooves 2 four spherical bodies 4 are positioned, each of the spherical bodies 4 having a diameter substantially the same as although slightly less than the diameter of the cross-section of the flute 2. The spherical bodies are also preferably made of steel and may be conventional ball bearings. The circular sectioned wall of the flutes 2 supports the spherical bodies 4 which are retained within the flutes 2 in the radial direction, prior to firing by the wall of the casing, and after firing by the wall of the barrel.
  • The rear of the slug 1 may be abutted by a plug (not shown) in order to provide a satisfactory seal to the casing (not shown) to prevent the blast from the explosion of the charge passing around the sides of the slug.

Claims (2)

1. A slug (1) which has a plurality of grooves (2) in its outer surface, each of the grooves being substantially "U" shaped in cross section and containing a plurality of spherical bodies (4) arranged in rows in each of the grooves, characterized in that the slug (1) is of ogival shape that the grooves extend helically around or substantially parallel to the longitudinal axis of the slug, and that the spherical bodies (4) have a diameter substantially equal to that of the cross-section of the grooves (2) to support and stabilize the slug in a barrel through which it is fired.
2. An ammunition round comprising a casing for containing a propelling charge and a bullet or slug of ogival shape as defined in claim 1.
EP84100331A 1983-06-22 1984-01-13 Bullet Expired EP0150229B1 (en)

Priority Applications (28)

Application Number Priority Date Filing Date Title
EP84100331A EP0150229B1 (en) 1984-01-13 1984-01-13 Bullet
AT84100331T ATE39386T1 (en) 1984-01-13 1984-01-13 BULLET FOR FIREARMS.
DE8484100331T DE3475730D1 (en) 1984-01-13 1984-01-13 Bullet
HU842985A HU192037B (en) 1983-06-22 1984-06-13 Cartridge for guns and plastic shoe for gun cartridges
AT84106760T ATE42400T1 (en) 1983-06-22 1984-06-13 AMMUNITION.
PCT/EP1984/000174 WO1985000218A1 (en) 1983-06-22 1984-06-13 Ammunition round
AU31005/84A AU578029B2 (en) 1983-06-22 1984-06-13 Ammunition round
EP84106760A EP0129777B1 (en) 1983-06-22 1984-06-13 Ammunition round
DE8484106760T DE3477835D1 (en) 1983-06-22 1984-06-13 Ammunition round
BR8406941A BR8406941A (en) 1983-06-22 1984-06-13 MUNICIPAL PIECE
HU845419A HU197441B (en) 1983-06-22 1984-06-13 Cartridge for guns
US06/621,735 US4644866A (en) 1983-06-22 1984-06-18 Ammunition round
IL9437884A IL94378A (en) 1984-01-13 1984-06-21 Ammunition round
KR1019840003532A KR870002025B1 (en) 1983-06-22 1984-06-22 Rifle ammunition
CA000457266A CA1278952C (en) 1983-06-22 1984-06-22 Ammunition round
ES1984287861U ES287861Y (en) 1983-06-22 1984-06-22 AMMUNITION FOR FIREARMS.
NO850702A NO160274C (en) 1983-06-22 1985-02-21 PATTERN FOR GUNS.
DK079585A DK163378C (en) 1983-06-22 1985-02-21 PATTERN FOR THE ARMY
ES1985291321U ES291321Y (en) 1983-06-22 1985-12-27 PERFECTED AMMUNITION FOR FIREARMS.
ES1985291320U ES291320Y (en) 1983-06-22 1985-12-27 ARMS AMMUNITION ARRANGEMENT
ES1985291319U ES291319Y (en) 1983-06-22 1985-12-27 FIREARMUNCTION.
ES1985291322U ES291322Y (en) 1983-06-22 1985-12-27 IMPROVED GUN AMMUNITION.
US06/902,297 US4700630A (en) 1983-06-22 1986-08-29 Ammunition round
US07/078,549 US4829904A (en) 1983-06-22 1987-09-02 Ammunition round
NO883792A NO170440C (en) 1983-06-22 1988-08-25 HAND ARMUNICATIONS
IL94378A IL94378A0 (en) 1983-06-22 1990-05-14 Ammunition round
FI903702A FI903702A0 (en) 1983-06-22 1990-07-23 PATRON.
DK113391A DK113391A (en) 1983-06-22 1991-06-13 CARTRIDGE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84100331A EP0150229B1 (en) 1984-01-13 1984-01-13 Bullet

Publications (2)

Publication Number Publication Date
EP0150229A1 EP0150229A1 (en) 1985-08-07
EP0150229B1 true EP0150229B1 (en) 1988-12-21

Family

ID=8191700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100331A Expired EP0150229B1 (en) 1983-06-22 1984-01-13 Bullet

Country Status (3)

Country Link
EP (1) EP0150229B1 (en)
AT (1) ATE39386T1 (en)
DE (1) DE3475730D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020160191A1 (en) * 2019-01-29 2020-08-06 Mark Thompson Systems and methods for matching ogive twist and barrel twist

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU595072B2 (en) * 1988-08-30 1990-03-22 Nagatoshi Maki Slug assembly for shotgun shotshell
US11268791B1 (en) 2014-05-23 2022-03-08 Vista Outdoor Operations Llc Handgun cartridge with shear groove bullet

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129608A1 (en) * 1983-06-22 1985-01-02 Branscomb Corporation N.V. Bullet

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE583098C (en) * 1932-05-07 1933-08-28 Paul Thuermer Shotgun barrel
FR1124740A (en) * 1955-04-19 1956-10-16 Hunting cartridge

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129608A1 (en) * 1983-06-22 1985-01-02 Branscomb Corporation N.V. Bullet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020160191A1 (en) * 2019-01-29 2020-08-06 Mark Thompson Systems and methods for matching ogive twist and barrel twist

Also Published As

Publication number Publication date
DE3475730D1 (en) 1989-01-26
ATE39386T1 (en) 1989-01-15
EP0150229A1 (en) 1985-08-07

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