RU218009U1 - 7.62 mm double-bullet cartridge - Google Patents

Abstract

The utility model relates to the field of firearms and can be used in combat conditions, when it is necessary to create a high density of fire. The proposed design of a 7.62-mm double-bullet cartridge includes: a regular 7.62-mm bullet with a recess in the tail section and a tubular bullet, which with its head part cuts into the recess in the tail section of the lead bullet, designed in combination to destroy manpower and equipment the enemy with greater efficiency due to the high accuracy of fire. Also, the improved ballistic performance of the 7.62-mm double-bullet cartridge can be widely used and this cartridge can be used in combat operations in urban combat in order to increase the fire density by several times. The use of this utility model allows you to improve the quality and efficiency of shooting by increasing the number and dispersion of bullets.

Description

The utility model relates to the field of small weapons and can be used by motorized rifle units or special forces in the course of combat operations in urban areas, when it is necessary to create a high density of fire.

Known domestic 12.7-mm two-bullet cartridge 1SL-9-A-4012 and 12.7-mm two-bullet tracer cartridge 1SLT-9-A-4427, which are designed to increase the efficiency of fire and do not replace other regular cartridges.

However, the main disadvantage of the above prototype is a sharp increase in the dispersion of bullets at ranges greater than 150-200 m, which affects the accuracy of fire and ultimately leads to the limited distribution and use of these cartridges in today's intense combat.

Also known is the American cartridge M198 of the 1964 model, which has 2 bullets of 5.2 g each. The first bullet has a recess in the tail section, where the head of the second bullet enters.

However, this foreign sample of the cartridge, with an increase in the firing range over 150 m, sharply loses the speed of the bullet, as a result of which dispersion increases and the firing efficiency decreases.

An American two-bullet cartridge is known from the prior art (patent for invention US 2014/0261042 A1), consisting of a first bullet with a recess in the tail, a second bullet, a cartridge case, a propellant powder charge and an igniter primer. The proposed cartridge may have at least two submunitions. The back of the first cartridge has a cavity or notch to support the front of the subsequent cartridge. It is proposed to install a retaining insert in the sleeve to prevent longitudinal movement and hold the second and subsequent bullets.

The disadvantage of this invention is the use of additional support structures in this cartridge, as a result, the complexity and cost of manufacturing the cartridge increases significantly.

Known patent for the invention of the US cartridge US 3862600 A, designed for rifled weapons. Tests of this multi-bullet cartridge showed a large spread of striking elements at short distances (at a distance of 18 m from the muzzle of the barrel to the target, the spread was 0.1 m). This patent proposes application to .45 caliber (11.43×23) weapons.

The disadvantage of the patent is the use of cone-shaped bullets having a non-classical shape, which in turn leads to additional costs for retooling existing production equipment.

There is a domestic patent for the invention RU 2438093 C1. It proposes the use of a three-bullet cartridge for 12.7 mm caliber weapons. In the second and subsequent bullets of complex geometric shape, a through longitudinal channel is made with a consistent increase in its cross section.

In all available patents for inventions, bullets are given that have a non-classical shape, which requires the retooling of existing production equipment and the investment of material resources, as well as the production of a new type of small arms.

The purpose of the utility model is to increase the efficiency of firing by improving the accuracy and increasing the density of fire.

The use of multi-bullet cartridges is of interest and has certain advantages, as it allows several times to increase the density of fire.

The claimed utility model is illustrated by figure 1, which shows the design of a 7.62-mm double-bullet cartridge. The proposed device consists of a 7.62 mm bullet with a notch in the tail (1), a 7.62 mm tubular bullet (2), a propellant charge (3), an igniter primer (4), a sleeve (5). Distinctive features are that it uses a 7.62 mm bullet with a notch in the tail, having a mass of 5.1 grams and an initial exit velocity from the bore of 860 meters per second, which houses the head of a 7.62 mm tubular bullet weighing 4.7 grams, with a longitudinal hole with a diameter of 2 mm, made according to the Krnk-Hebler scheme, having an initial departure speed of 800 meters per second. Used sleeve (5) is designed to accommodate and protect from external influences propellant powder charge, fastening the primer and two bullets, basing the cartridge in the chamber of the weapon and obturation of powder gases when fired. The propelling powder charge (3) is a 1.75 g powder charge located in the sleeve, during the combustion of which the bullets are pushed out of the bore. The primer-igniter (4) is designed to ignite the propellant powder charge (3).

The goal of the utility model is achieved through the use of a 7.62-mm double-bullet cartridge, which uses a standard caliber of 7.62, as a result of which there is no need to re-equip the existing production equipment and invest material resources, as well as to produce a new type of small arms. Accuracy of fire is achieved due to high ballistic performance. The density of fire is achieved by increasing the number of bullets per meter of the front, when compared with standard ammunition, the utility model allows you to increase it by 2 times. As a result, the effectiveness of firing from individual small arms is increased. The claimed device is suitable for widespread use in the course of combat missions in urban environments.

Thus, the 7.62-mm double-bullet cartridge makes it possible to increase the efficiency of firing from individual small arms by increasing the density and accuracy of fire.

List of sources used

1. Fundamentals of small arms cartridges. V.A. Korolev, A.V. Gusev, A.V. Kurenkov. Penza PFVAMTO, 2012, pp. 8-48.

2. Live cartridges of small arms: monograph, in 4 books. / Dvoryaninov V.N. Book 2: Modern foreign cartridges [Text].

3. US patent No. 0261042 A1, IPC F42B 5/03, publ. 09/18/2014

4. US patent 3862600 A, IPC F42B 5/02, publ. March 5, 1975

5. RF patent No. 2438093, IPC F42B 5/02, publ. July 29, 2010

6. Instructions on shooting - M .: Military Publishing House of the USSR Ministry of Defense, 1985

Claims (1)

7.62 mm double-bullet cartridge, consisting of a 7.62 mm bullet with a notch in the tail, a 7.62 mm tubular bullet, a propellant charge, an igniter primer, a cartridge case, characterized in that 7.62 mm is used a bullet with a notch in the tail, having a mass of 5.1 grams and an initial velocity of departure from the bore of 860 meters per second, which houses the head of a 7.62-mm tubular bullet weighing 4.7 grams, with a longitudinal hole with a diameter of 2 mm, made according to the Krnk-Hebler scheme, having an initial departure speed of 800 meters per second.

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