Bullet Trap and Bullet Deflector in Rifle Grenade
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Patentamt 0171534 JEuropaischesEuropean Patent Office Publication number: B1 Office europeen des brevets EUROPEAN PATENT SPECIFICATION F42B 11/42 @ Date of publication of patent specification: 17.05.89 (bD Intel.4: (§) Application number: 85106963.3 (22) Date of filing: 05.06.85 Bullet trap and bullet deflector in rifle grenade. Priority: 11.06.84 US 619342 Proprietor: THE STATE OF ISRAEL MINISTRY OF DEFENCE ISRAEL MILITARY INDUSTRIES 64 Sderoth Bialik P.O.Box 1044 Date of publication of application: Ramat Hasharon 47 100 (IL) 19.02.86 Bulletin 86/08 Inventor: Gordon, Tsvi Joseph Publication of the grant of the patent: 31 Tchernihovsky Street 17.05.89 Bulletin 89/20 Jerusalem 92 587 (IL) Inventor: Moseinco, David 15/5 Beit Hakerem Street Designated Contracting States: Jerusalem 96 343 (IL) BEDEFRGBITNLSE (74) Representative: Altenburg, Udo, Dipl.-Phys. References cited: etal AT-B-341378 Patent- und Rechtsanwalte Bardehle- DE-A-2428 624 Pagenberg-Dost-Altenburg & Partner Postfach FR-A-2461921 86 06 20 FR-A-2 515 808 D-8000 Munchen 86 (DE) CD FR-A-2 517 820 US-A-3 425 349 CO Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been IU paid. (Art. 99(1 ) European patent convention). Courier Press, Leamington Spa, England. EP 0 171 534 B1 Description angular bore of the bullet deflector, to be deflected thereby out of the assembly's housing, BACKGROUND OF THE INVENTION without reaching the fuse and/or the explosive. 1. Field of the Invention The invention will best be understood from the The present invention is generally directed to 5 following description when read in conjunction improvements in an assembly for launching with the accompanying drawings. explosives by means of a rifle and, more particu- larly, to improvements in rifle grenades to be BRIEF DESCRIPTION OF THE DRAWINGS launched with live ammunition is to be used. Fig. 1 is a simplified side view of a rifle grenade 10 which includes the invention; and 2. Description of the Prior Art Fig. 2 is a cross-sectional view of a bullet trap All known prior art rifle grenade assemblies and bullet deflector arrangement in accordance hereafter simply referred to as grenade, include a with the invention. fuse which is intended to be activated by gas pressure from a fired blank cartridge in the rifle. 15 DETAILED DESCRIPTION OF THE PREFERRED As is known, the gas pressure causes the fuse's EMBODIMENTS aft diaphragm to become deformed in a forward In order to fully appreciate the advantages direction toward the explosive matter of the realized with the present invention, it is believed grenade. It in turn pushes fore an armi.ig pin important to briefly summarize the prior art. which enables the fuse to be armed to enable the 20 As used in this specification the term "rifle explosion of the explosives upon hitting a target. grenade" or simply "grenade" denotes a grenade A danger has existed in the prior art in that if such as an anti-personnel, a smoke or an anti-tank instead of loading a blank cartridge into the rifle, grenade adapted to be projected by a rifle, car- live ammunition is used, the live bullet may, and bine or smaller firearm. It comprises a grenade often does, deform the diaphragm thus arming 25 body to which is fitted a tubular, fin stabilized tail. the fuse prematurely very near the soldier. This in The tail is adapted to be fitted to a rifle muzzle turn could lead to an explosion near the soldier directly or via a suitable adapter. The grenade and thus endanger him and those around him. It body includes explosives located within a head is also possible for the bullet to pass through the portion and a fuse which is typically aft of the entire fuse and penetrate and ignite the 30 explosives. explosives, which is clearly most dangerous. Prior art grenades are designed to be propelled FR-A-2 461 921 discloses a rifle grenade with to a target by firing a special launching cartridge bullet trapping means in combination with bullet which, upon detonation, generates propulsion deflector means. In cases in which the bullet gases. They serve to project the grenade towards continues its travel beyond said trapping means it 35 its target, with the grenade exploding upon, or is deflected from the axial direction by the deflec- immediately prior to, impact as a result of the tor means. However in cases the bullet continues arming of the fuse. beyond the deflector it may still reach the head The rifle or the like which is employed is position and bring about the explosion of the normally used to fire live bullets. It is only when it explosive material therein. 40 is desired to project a grenade that the latter is Rifle grenades with bullet trapping means are fitted over the rifle muzzle. A distinct danger also known from AT-B-341 378 and DE-A-2 428 therefore arises that, as a result of an oversight, 378. instead of using the required launching cartridge, It is believed that a rifle grenade which is to be a live cartridge, i.e. one containing a bullet, will be launched with live ammunition rather than with 45 fired for launching the grenade. The firing of such blank cartridges could be made very safe if a live cartridge with the grenade mounted on the properly designed. With such a grenade, a soldier muzzle of the rifle carries with it extreme danger would not have to carry special blank cartridges for the firer and for those in his immediate but would be able to use the conventional ball surroundings. ammo for grenade launching. so In the prior art, in order to reduce the dangers In accordance with the invention there is pro- involved in the accidental firing of a live cartridge vided a rifle grenade of the kind specified in the rather than the special launching cartridge, it has preamble of claim 1, characterized in that said been proposed to provide such rifle grenades bullet deflector means comprise a block of matter with so-called "bullet deflectors". with a bore whose axis forms an acute angle with 55 These deflectors, located ahead or fore of the the longitudinal axis of the grenade, extending muzzle and aft of the grenade body, were from a central location on an aft side of the block designed to deflect any bullet from reaching the toward a side wall thereof. grenade body in case a live bullet was used, while The function of the bullet deflector is to deflect enabling the gases, produced by firing the live any bullet which may not have been trapped by eo cartridge, to reach the grenade body, typically the the bullet trap from reaching the fuse or even aft end of the fuse, to propel the entire grenade to passing it and penetrating the explosives. Thus, a the target while at the same time arming the fuse. bullet with excessive acceleration which may not It has been found that the need to carry special have been trapped by the bullet trap will exit the cartridges for rifle grenade launching by a rifle latter axialiy and in all probability enter the 65 designed for live cartridges, known as ball EP 0 171 534 B1 4 functions. One ammunition, complicates matters. In the heat of The steel element 40 serves two and it from battle the likelihood is high that ball ammo may is to trap the bullet 60 prevent The other function be used instead of the special cartridges, thus advancing into the fuse 14. follows. As result of bullet subjecting the soldier and those around him to may be explained as a volume of element 40 increases and nearby premature life-endangering explosives. 5 trapping the elements ahead of it, thereby In order to put the invention in proper context, thus deforms the is directed to Fig. 1, wherein a rifle providing a forward force. In an arrangement attention fore of the 10 in accordance with the invention is wherein a bullet deflector is included grenade deform elements As in the art it includes a forward or trap, this forward force serves to shown. prior the 12 with head 13, containing the 10 of the deflector which in turn press against fore section a forward and a fuse 14 aft of it. It also includes a fuse diaphragm 14d. It in turn pushes a explosives, the fuse arming tail section 16 with an internal bore 17 to enable fuse arming piston 14p to start the rifle grenade to be mounted to a rifle muzzle process. invention, the steel element 40 directly or through an adapter. At the aft end, In the present bullet into the free stabilizing fins 18 are formed. The rifle grenade of 15 upon trapping a expands space 42 it is symmetrical the invention, unlike the prior art, is 47 around it. As to the cavity present thus retain the bullet designed to be used with live cartridges, known about axis 45 and helps ball ammunition (ammo). When the rifle is along axis 45. Cavity 42 is preferably cone shaped as section. In the cone fired with a loaded live cartridge the bullet is followed by a cylindrical is gradually dissi- propelled fore and the forces of gases propel the 20 shaped section slug energy is in the entire rifle grenade 10 to the target.