US3479956A - Self-propelled rifle grenade capable of being launched by bullet impact - Google Patents

Self-propelled rifle grenade capable of being launched by bullet impact Download PDF

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Publication number
US3479956A
US3479956A US664667A US3479956DA US3479956A US 3479956 A US3479956 A US 3479956A US 664667 A US664667 A US 664667A US 3479956D A US3479956D A US 3479956DA US 3479956 A US3479956 A US 3479956A
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United States
Prior art keywords
grenade
nozzles
launched
rifle
propelled
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
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US664667A
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English (en)
Inventor
Louis Birkigt
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.)
Brevets Aero Mecaniques SA
Original Assignee
Brevets Aero Mecaniques SA
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 Brevets Aero Mecaniques SA filed Critical Brevets Aero Mecaniques SA
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Publication of US3479956A publication Critical patent/US3479956A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F42B30/00—Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
    • F42B30/04—Rifle grenades

Definitions

  • the invention relates to a grenade to be launched by means of a bullet from a rifle on the end of the barrel of which a tubular tail of the grenade is fitted, said bullet striking an axial obstacle carried by the grenade.
  • the grenade further comprises an auxiliary propelling charge delivering powder gases through annular nozzle means opening toward the rear, and igniting means extending from the axial obstacle to said auxiliary propelling charge.
  • the present invention relates to grenades to be launched by means of a firearm (for instance a rifle), such a grenade being fitted, in launching position, on the end of the rifle barrel and launching proper being performed by firing a bullet, which is generally, but not necessarily, of the type normally used with this rifle.
  • a firearm for instance a rifle
  • a grenade being fitted, in launching position, on the end of the rifle barrel and launching proper being performed by firing a bullet, which is generally, but not necessarily, of the type normally used with this rifle.
  • the object of the present invention is to provide a grenade of this kind which is better adapted to meet the requirements of practice than those known up to now and in particular a grenade comprising auxiliary propelling means which improve the performance obtained.
  • Such a grenade comprises a supporting sleeve located at the rear of the grenade and adapted to fit 0n the outer surface of the front end of the launching gun barrel, said sleeve carrying advantageously in the front part thereof, an axial obstacle capable of collecting and transmitting to the grenade the impulse produced by the impact of a bullet fired by the rifle.
  • the grenade further comprises an auxiliary propulsion charge located coaxially on the outside of said supporting sleeve, preferably at the level of said axial obstacle, and igniting means extending from said axial obstacle to said auxiliary propulsion charge, said igniting means being adapted to be operated by the impact of the launching bullet on said axial obstacle.
  • FIG. 1 is a diagrammatic elevational view, with parts in section, of a grenade according to this invention
  • FIG. 2 is a perspective view illustrating a modification
  • FIG. 3 is another perspective view illustrating another modification.
  • the grenade according to this invention includes an intermediate body 1 extending frontwardly to form a war-head 2 and provided, rearwardly thereof, with a supporting sleeve 3 adapted to fit on the front end of the launching rifle barrel (which may carry an accessory such as a muzzle brake or a flame shield).
  • Sleeve 3 may carry fins 4.
  • This grenade is provided with an axial obstacle 5, for instance of steel, for collecting and transmitting to the grenade the impulse resulting from the impact on said obstacle of a launching bullet fired from the rifle.
  • the Ohstacle 5 is rigid with, that is, immovable with respect to the sleeve.
  • Said obstacle consists for instance of a frustoconical piece housed in the front part of sleeve 3.
  • the grenade further comprises the following elements:
  • Auxiliary propelling means 6 capable of improving the performance of the grenade and disposed on the outside of sleeve 3 and coaxially therewith, preferably, as shown, in the front portion of said sleeve, between the front end thereof and the center of gravity G of the grenade, and
  • Igniting means extending from axial obstacle 5 to auxiliary propelling means 6, said igniting means being adapted to be operated by the impact of the launching bullet on axial obstacle 5.
  • Auxiliary propelling means 6 are advantageously arranged to include a propellent charge symmetrically disposed about the axis of the grenade, the gases from said charge flowing out through at least one nozzle 6a.
  • Auxiliary propelling means 6 may include:
  • a propellent charge made of several similar elements disposed in a circular or closed polygonal row at equal intervals from One another, which elements may feed combustion gases either to a single annular nozzle or to several circular nozzles disposed in circular row at equal intervals from one another.
  • every propellent element may feed its combustion gases to a corresponding nozzle.
  • the auxiliary propelling means 6 include several nozzles 6a disposed in circular row
  • said components Vt impart to the grenade, as soon as the auxiliary propelling charge is ignited, a stabilizing gyratory movement about the grenade axis.
  • auxiliary propelling charge 6 includes several circular nozzles disposed in a circular row or when said auxiliary propelling charge includes a single annular nozzle
  • the nozzle or nozzles 6a are arranged so that, at any point of the outlet section of the propelling stream forming a frusto-conical sheet, the discharge velocity V has a radial component Vr.
  • auxiliary propelling means 6 is disposed at the rear of the center of gravity G of the grenade
  • the arrangement of the nozzle or nozzles 6a will be such that the radial component Vr is directed outwardly and has an intensity such that the convergence point P is located slightly at the rear of the center of gravity G.
  • An ignition relay is provided between auxiliary propelling device 6 and a primer or the like 7 carried by axial obstacle and preferably located near the front of said axial obstacle.
  • This ignition relay may advantageously include a transmission charge 8 consisting of an incendiary composition located immediately at the front of primer 7, said transmission charge 8 being in communication through at least one radial conduit 9 (and preferably several such conduits) with the ignition surface S of auxiliary propelling charge 6.
  • the casing of said propelling 6 may be provided with at least one safety valve 10 or the like.
  • the firers eyes may be protected from the flames issuing from the nozzle or nozzles 6a, by providing at the rear of said nozzle 6a a baffle 11 (shown in dot-and-dash lines in FIG. 1), this baflle converging toward the rear and causing the gases issuing from the nozzle or nozzles to move toward socket 3.
  • a baffle 11 shown in dot-and-dash lines in FIG. 1
  • a grenade made according to the present invention is relatively short because the location of the booster on the outside of the supporting sleeve does not make it necessary to overdimension said sleeve in the axial direction.
  • the device does not produce an increase of the recoil, owing also to the external position of the booster.
  • the dispersion is reduced owing to the fact that the booster is located in the vicinity of the center of gravity of the grenade.
  • An improved grenade which comprises, in combination,
  • a sleeve of revolution rigid with the rear part of said body said sleeve including a cylindrical rear extension adapted to fit on the end of the barrel of a launching rifle
  • an axial obstacle immovable with respect to said sleeve adapted to receive and to transmit to said body the impact of a bullet fired from the launching rifle, said obstacle comprising a generally frusto-conical piece disposed with its small base towards the front,
  • an auxiliary propulsion means carried by said sleeve, including a powder charge surrounding said sleeve coaxially thereto and close to said obstacle, and
  • igniting means extending between said obstacle and said powder charge and operative by a launching bullet striking said obstacle, said igniting means comprising a primer located near the front of said generally frusto-conical piece.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US664667A 1966-09-14 1967-08-31 Self-propelled rifle grenade capable of being launched by bullet impact Expired - Lifetime US3479956A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU51960A LU51960A1 (is") 1966-09-14 1966-09-14
LU52164A LU52164A1 (is") 1966-09-14 1966-10-13

Publications (1)

Publication Number Publication Date
US3479956A true US3479956A (en) 1969-11-25

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US664667A Expired - Lifetime US3479956A (en) 1966-09-14 1967-08-31 Self-propelled rifle grenade capable of being launched by bullet impact

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US (1) US3479956A (is")
CH (1) CH461998A (is")
LU (2) LU51960A1 (is")

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3880044A (en) * 1973-07-05 1975-04-29 Us Army Muzzle attachment for accelerating a projectle
FR2448706A1 (fr) * 1979-02-09 1980-09-05 Luchaire Sa Perfectionnements apportes aux munitions, notamment antichars, lancees par une arme a tir tendu
FR2508623A2 (fr) * 1979-02-09 1982-12-31 Luchaire Sa Perfectionnements apportes aux munitions, notamment antichars, lancees par une arme a tir tendu
US5153374A (en) * 1990-11-14 1992-10-06 Fabrique Nationale Nouvelle Herstal, En Abrege Fnnh, Societe Anonyme Projectiles
FR2712686A1 (fr) * 1993-11-16 1995-05-24 Poudres & Explosifs Ste Nale Ensemble propulseur-allumeur adaptable aux grenades à bouchon.
US8196513B1 (en) * 2009-12-04 2012-06-12 The United States Of America As Represented By The Secretary Of The Navy Stand-off disrupter apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1376119A (en) * 1917-07-11 1921-04-26 Us Ordnance Co Rifle-grenade
US1448436A (en) * 1919-10-27 1923-03-13 Robert D Day Rifle and hand grenade
US1900790A (en) * 1930-07-25 1933-03-07 Brandt Edgar William Grenade
US3007410A (en) * 1950-10-04 1961-11-07 Blacker Latham Valenti Stewart Reaction-propelled aerial and other bodies
US3071073A (en) * 1959-05-21 1963-01-01 Brevets Aero Mecaniques Projectiles to be launched by means of a firearm and including an auxiliary propulsion motor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1376119A (en) * 1917-07-11 1921-04-26 Us Ordnance Co Rifle-grenade
US1448436A (en) * 1919-10-27 1923-03-13 Robert D Day Rifle and hand grenade
US1900790A (en) * 1930-07-25 1933-03-07 Brandt Edgar William Grenade
US3007410A (en) * 1950-10-04 1961-11-07 Blacker Latham Valenti Stewart Reaction-propelled aerial and other bodies
US3071073A (en) * 1959-05-21 1963-01-01 Brevets Aero Mecaniques Projectiles to be launched by means of a firearm and including an auxiliary propulsion motor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3880044A (en) * 1973-07-05 1975-04-29 Us Army Muzzle attachment for accelerating a projectle
FR2448706A1 (fr) * 1979-02-09 1980-09-05 Luchaire Sa Perfectionnements apportes aux munitions, notamment antichars, lancees par une arme a tir tendu
FR2508623A2 (fr) * 1979-02-09 1982-12-31 Luchaire Sa Perfectionnements apportes aux munitions, notamment antichars, lancees par une arme a tir tendu
US5153374A (en) * 1990-11-14 1992-10-06 Fabrique Nationale Nouvelle Herstal, En Abrege Fnnh, Societe Anonyme Projectiles
FR2712686A1 (fr) * 1993-11-16 1995-05-24 Poudres & Explosifs Ste Nale Ensemble propulseur-allumeur adaptable aux grenades à bouchon.
US8196513B1 (en) * 2009-12-04 2012-06-12 The United States Of America As Represented By The Secretary Of The Navy Stand-off disrupter apparatus

Also Published As

Publication number Publication date
LU52164A1 (is") 1968-05-08
DE1578088A1 (de) 1971-08-12
LU51960A1 (is") 1968-03-20
CH461998A (fr) 1968-08-31

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