US3528336A - Muzzle assembly for smooth-bore projectiles - Google Patents

Muzzle assembly for smooth-bore projectiles Download PDF

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Publication number
US3528336A
US3528336A US716519A US3528336DA US3528336A US 3528336 A US3528336 A US 3528336A US 716519 A US716519 A US 716519A US 3528336D A US3528336D A US 3528336DA US 3528336 A US3528336 A US 3528336A
Authority
US
United States
Prior art keywords
barrel
assembly
discs
projectile
muzzle
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 - Lifetime
Application number
US716519A
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English (en)
Inventor
Fredrik Donner
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.)
Tampella Oy AB
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Tampella Oy AB
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Filing date
Publication date
Application filed by Tampella Oy AB filed Critical Tampella Oy AB
Application granted granted Critical
Publication of US3528336A publication Critical patent/US3528336A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/32—Muzzle attachments or glands

Definitions

  • the spacer discs are located between the disc members to form outlet openings along the periphery of the assembly to exhaust firing gases therethrough.
  • the disc members form an inner diameter along the entire length of the radial opening section. This inner diameter is substantially identical to the inner diameter of the barrel on the firearm.
  • the outlet openings extend from the inner diameter of the radial opening section to the periphery of the assembly at an acute angle of inclination with respect to the trajectory of the projectile.
  • MUZZLE ASSEMBLY FOR SMOOTH-BORE PROJECTILES BACKGROUND OF THE INVENTION Various types of muzzle assemblies on rifled barrels for firearms are known. Generally, cage-like structures are involved, provided with radial openings of a greater or lesser size, and having a larger inner diameter than the barrel. Further, in muzzle assemblies the disposition of the openings for the explosive gases is so formed that the gases are to a greater or lesser extent deflected backwards.
  • Firearms such as mortars, grenade launchers and the like which fire smooth-bore, fin-stabilized projectiles are well known in the prior art.
  • the barrels on these types of firearms are smoothbore so that the peripheral surface of the smoothbore projectiles contact the inner diameter surface thereof upon firing the firearm.
  • the use of muzzle assemblies on such smooth-bore barrels is heretofore unknown in the prior art.
  • the object of the invention is to make a barrel end or muz zle assembly, especially for smoothbore barrels, by means of which the passage of the projectile can be beneficially influenced.
  • the barrel-end is characterised according to the invention in that radial openings are provided in the barrel or the assembly on the inner circumference of the barrel-end or muzzle assembly, having an identical inner diameter, corresponding to the barrel.
  • the openings can be formed as annularly running grooves. In this instance the ,series of grooves can be spiral. Further, the openings can be formed as outletslots passing through the barrel or the assembly.
  • the openings or holes in the barrel-end and the like are so distributed that contact of the projectile or its fin-assembly is maintained with the barrel up to the barrel-end.
  • some fins of the fin-assembly are always in contact with the inner wall of the barrel-end or barrelextension.
  • the design according to the invention of the barrelend and the like leads to an increased stabilising effect of the barrel on the projectile.
  • the accuracy of the weapon is considerably increased. On average, the accuracy is twice as great as previously.
  • the projectile itself is subject to less scatter. Further, the weapons stability is increased.
  • the reduction or exclusion of the jet effect directly at the barrel mouth means that the projectile can achieve a higher muzzle velocity, resulting in a longer range.
  • the named design of the barrelend or barrel-extension causes a quieter shot. This has the advantage of making it more difficult to discover the site of the weapon from the noise.
  • outletslots are preferably arranged at an inclination running at an acute angle to the direction of flight of the projectile. In this way the explosive gases can escape undisturbed in the effective direction. Turbulence and thereby sources of loss are avoided.
  • the construction of the muzzle assembly with oblique outlet slots is preferably done by the assembly of a number of obliquely-angled annular discs alternating with distance-discs.
  • a larger number of obliquely-running guide-surfaces and outlet slots for the explosive gases in the direction of the projectile trajectory are obtained.
  • the construction is characterised by its simplicity.
  • the inner diameter of the annular discs should correspond to the inner diameter of the barrel.
  • the annular discs can be assembled into a package" of discs with the distancediscs, in fact between a base-part and a head part. Connection is by anchor bolts passing through the discs.
  • a muzzle assembly made up of many single discs, as a unit which can be attached as a whole part to the barrel-end of the mortar or the like. So that the discs are locked on one another, a locking-rod can be passed through the discs.
  • the holes in the discs designed to contain the anchor bolts can be provided with radial openings into which the locking rod, running parallel to the anchor bolt, is inserted.
  • Such a muzzle assembly meets all the demands required of it, as a compact unit.
  • FIG. 1 is a longitudinal sectional view along line II-II of FIG. 2.
  • FIG. 2 is a partial sectional view along the line III III of FIG. 1.
  • FIG. 3 is a longitudinal view partially in cross-section of another embodiment of a muzzle assembly made in accordance with this invention.
  • FIG. 4 is a sectional view along the line IV- IV of FIG. 3.
  • the muzzle assembly 20 has radial outlet-slots or openings 5c, which are arranged at an acute angle to the direction of flight 6 of the projectile, i.e. outwards and obliquely upwards.
  • a large number of such slots 5c is preferably provided.
  • the explosive gases issuing from the barrel are deflected obliquely upwards and outwards, all round, by the guide-surfaces limiting slots 5c, so that the gases are afforded clean and directed guidance.
  • the withdrawal of the gases takes place in laminar fashion with a relatively smaller diversion from the flowdirection in the barrel, the angular deflection of the slots lying in the region of an acute angle to the projectiles path.
  • the angle comes to about 45 degrees, for preference.
  • the inclination of the slots can also be made slightly smaller, or slightly larger.
  • the muzzle assembly is constructed so that it has a large number of annular disc members 7 which lie at the angle of-inclination provided. Spacer discs 8 are provided between the annular discs. A package" made up of these disc members and spacer discs is located between a correspondingly-designed base-part 9 and a head-part It). The whole is held together by anchor-bolts 11, so that a compact unit results.
  • the assembly can be screwed on the thread 12 or barrel 1.
  • Disc 13 grips under the projecting part of the barrel 1.
  • the anchor-bolts 11 are screwed tight by nuts 14.
  • the spacer discs 8 are essentially plate-parts of restricted dimensions and breadth, so that an abundant free space 50 remains for the outlet-slot.
  • the discs 8 are formed as favourable to flow in their contour, and are in essence droplike. So that the discs cannot move, their position is fixed by a lockingrod 15.
  • a radially-running opening 16 is provided, in each annular disc member 7 and in each spacer disc 8, locking-rod 15 being thrust through the said opening 16.
  • Annular disc members 7 preferably have an inner diameter which corresponds to the clear diameter of barrel 1. In this way the muzzle assembly forms at the same time an extension of the barrel to guide the projectile.
  • the surface of the outflow slots 50 becomes gradually greater with the forward movement of the projectile, as more slot openings are released. The gases directed outwards all round in quiet paths.
  • Ejdimen t inFlGS. 3 arid 4 spacer discs 17 have, at the outer end, extensions 18 which run more or less parallel with the longitudinal axis of muzzle assembly 2d in an arc. In this way the spacer discs 17 are locked on the anchor-bolts 1 1, so that the discs 17 cannot twist around the axis of the anchor bolts 11. In this way automatic twist-prevention for the discs is achieved.
  • Muzzle assembly 2d corresponds in its construction to assembly 2c of FIGS. 1 and 2. Attachment to barrel 1 can be provided by means of a box nut 19, which is screwed in a corresponding way on the end of barrel 1.
  • a muzzle assembly for use at the end of a smooth-bore barrel on firearms such as mortars, grenade launchers and the like which fire smooth-bore tin-stabilized projectiles comprising:
  • said mounting means including a base portion, a head portion, at least one anchor bolt member and at least one locking rod memberj c.
  • said base portion including means to connect the muzzle assembly to the end of the barrel at one end of the radial opening section;
  • spacer members being located between said disc members to formoutlet openings along the periphery of the assembly to exhaust firing gases therethrough;
  • said disc members forming an inner diameter along the entire length of the radial opening section, said diameter is substantially identical to the inner diameter of the barrel;
  • said disc members are annular and obliquely angled and form annular outlet openings therebetween;
  • said outlet openings extend from the inner diameter of said radial opening section to the periphery of the assembly at an acute angle of inclination with respect to the trajectory of the projectile;
  • said anchor bolt member extends through said disc members and said spacer members to secure said radial opening section between said base and head portions;
  • said locking rod member extends through the spacer members to prevent turning of the spacer members about said anchor bolt member.
  • said spacer members are disc-shaped and have a hole located around each anchor bolt member
  • each said spacer member hole includes a radially extending opening to fix the position of said spacer member at each locking rod member;
  • each said locking rod member and each said anchor bolt member being parallel with respect to each other.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Joining Of Building Structures In Genera (AREA)
US716519A 1967-04-01 1968-03-27 Muzzle assembly for smooth-bore projectiles Expired - Lifetime US3528336A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO0012403 1967-04-01

Publications (1)

Publication Number Publication Date
US3528336A true US3528336A (en) 1970-09-15

Family

ID=7352772

Family Applications (1)

Application Number Title Priority Date Filing Date
US716519A Expired - Lifetime US3528336A (en) 1967-04-01 1968-03-27 Muzzle assembly for smooth-bore projectiles

Country Status (10)

Country Link
US (1) US3528336A (no)
DE (1) DE1553895A1 (no)
DK (1) DK130129B (no)
FI (1) FI46778C (no)
FR (1) FR1597401A (no)
GB (1) GB1227414A (no)
IL (1) IL29671A (no)
NL (1) NL166787C (no)
NO (1) NO123865B (no)
SE (1) SE341706B (no)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703122A (en) * 1970-12-10 1972-11-21 Gen Electric Muzzle brake torque assist for multi-barrel weapons
US3905445A (en) * 1972-01-12 1975-09-16 Bolt Beranek & Newman Vortex turbulence noise generation suppressor
US4310296A (en) * 1978-02-15 1982-01-12 Societe Nationale Elf Aquitaine Heat-shield for gas-burning flare in oil production installations, particularly platforms at sea
EP0156945A2 (de) * 1983-10-14 1985-10-09 Rheinmetall GmbH Befestigung für ein Mündungsteil auf einem Waffenrohr
US4928573A (en) * 1988-10-26 1990-05-29 The United States Of America As Represented By The Secretary Of The Army Silencer for saboted projectiles
US5325759A (en) * 1993-04-19 1994-07-05 Warner Joseph G Flash suppressor
US5509345A (en) * 1994-01-26 1996-04-23 Cyktich; James M. Muzzle attachment for improving firearm accuracy
US20070221051A1 (en) * 2006-03-21 2007-09-27 Burkholder Daniel E Mortar blast attenuator diffuser
US8844422B1 (en) 2011-09-16 2014-09-30 Ut-Battelle, Llc Suppressor for reducing the muzzle blast and flash of a firearm
US8875612B1 (en) * 2012-09-06 2014-11-04 Ut-Battelle, Llc Suppressors made from intermetallic materials
WO2018078320A1 (en) * 2016-10-28 2018-05-03 Bae Systems Plc Noise attenuation device
US20180195826A1 (en) * 2017-01-11 2018-07-12 Palmetto State Armory, LLC Modified pistol upper
US10539386B2 (en) * 2016-12-29 2020-01-21 Pedro Cortés Contreras Muzzle brake for firearms
CN112414206A (zh) * 2020-11-19 2021-02-26 北京天创凯睿科技有限公司 一种炮镜

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025546C2 (de) * 1990-08-11 2002-03-14 Rheinmetall W & M Gmbh Mündungsbremse für eine großkalibrige Rohrwaffe
DE4231183C1 (de) * 1992-09-17 1994-03-31 Heckler & Koch Gmbh Schalldämpfer für Feuerwaffen
EP3315892A1 (en) * 2016-10-28 2018-05-02 BAE SYSTEMS plc Noise attenuation device

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703122A (en) * 1970-12-10 1972-11-21 Gen Electric Muzzle brake torque assist for multi-barrel weapons
US3905445A (en) * 1972-01-12 1975-09-16 Bolt Beranek & Newman Vortex turbulence noise generation suppressor
US4310296A (en) * 1978-02-15 1982-01-12 Societe Nationale Elf Aquitaine Heat-shield for gas-burning flare in oil production installations, particularly platforms at sea
EP0156945A2 (de) * 1983-10-14 1985-10-09 Rheinmetall GmbH Befestigung für ein Mündungsteil auf einem Waffenrohr
EP0156945A3 (en) * 1983-10-14 1987-01-21 Rheinmetall Gmbh Fixture for a muzzle piece to a barrel of a weapon
US4726280A (en) * 1983-10-14 1988-02-23 Rheinmetall Gmbh Mounting of a muzzle member on a gun barrel
US4928573A (en) * 1988-10-26 1990-05-29 The United States Of America As Represented By The Secretary Of The Army Silencer for saboted projectiles
US5325759A (en) * 1993-04-19 1994-07-05 Warner Joseph G Flash suppressor
US5509345A (en) * 1994-01-26 1996-04-23 Cyktich; James M. Muzzle attachment for improving firearm accuracy
US20070221051A1 (en) * 2006-03-21 2007-09-27 Burkholder Daniel E Mortar blast attenuator diffuser
US7798046B2 (en) * 2006-03-21 2010-09-21 Honeywell International Inc. Mortar blast attenuator diffuser
US8844422B1 (en) 2011-09-16 2014-09-30 Ut-Battelle, Llc Suppressor for reducing the muzzle blast and flash of a firearm
US8875612B1 (en) * 2012-09-06 2014-11-04 Ut-Battelle, Llc Suppressors made from intermetallic materials
WO2018078320A1 (en) * 2016-10-28 2018-05-03 Bae Systems Plc Noise attenuation device
US10670363B2 (en) 2016-10-28 2020-06-02 Bae Systems Plc Noise attenuation device
US10539386B2 (en) * 2016-12-29 2020-01-21 Pedro Cortés Contreras Muzzle brake for firearms
US20180195826A1 (en) * 2017-01-11 2018-07-12 Palmetto State Armory, LLC Modified pistol upper
US10619964B2 (en) * 2017-01-11 2020-04-14 Palmetto State Armory, LLC Modified pistol upper
CN112414206A (zh) * 2020-11-19 2021-02-26 北京天创凯睿科技有限公司 一种炮镜

Also Published As

Publication number Publication date
NL6804528A (no) 1968-10-02
GB1227414A (no) 1971-04-07
DK130129B (da) 1974-12-23
FR1597401A (no) 1970-06-29
SE341706B (no) 1972-01-10
DK130129C (no) 1975-06-09
FI46778B (no) 1973-02-28
IL29671A (en) 1972-04-27
DE1553895A1 (de) 1972-04-13
FI46778C (fi) 1973-06-11
NL166787C (nl) 1981-09-15
NO123865B (no) 1972-01-24

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