Partial Fragmentation Bullet
A partial fragmentation bullet comprising a nose core, which forms a fragmenting portion of the partial fragmentation bullet, and a rear core, which forms a penetration portion of the partial fragmentation bullet. The nose core and the rear core are made of materials having the same level of hardness. This level of hardness is in the Brinell hardness range.
Latest Brenneke GmbH Patents:
The instant application should be granted the priority date of Mar. 3, 2009, the filing date of the corresponding German patent application 10 2009 011 093.3.BACKGROUND OF THE INVENTION
The present invention relates to a partial fragmentation bullet for hunting purposes.
Modern rifle projectiles or bullets must satisfy various hunting-related requirements. The most important of these requirements is the target precision, i.e. the firing precision from various hunting weapons. Furthermore, the game is to be killed rapidly and without great agony. For this purpose, it is necessary that the bullet has a spreading effect and a depth effect in the body of the game. To fulfill this requirement, the bullet should fragment in the body of the game, and at the same time should retain a defined residual mass. This is achieved by a separation into two cores. A further requirement of modern rifle bullets is a formation of cut hair and blood at the entry wound in order to facilitate a possible search for a wounded animal, even where there is no exit wound. Since due to the elasticity of the fur coat, the skin, and the fat layer disposed below it, the point of entry frequently closes very rapidly, so that it is desirable to have an exit wound with the formation of blood, even when the firing angle is not favorable.
Coming very close to these requirements are the rifle projectiles that are attributable to the assignee of the present application and that are known world-wide under the trademark TUG (Torpedo-Universal-Geschoss [=projectile]) and TIG (Torpedo-Ideal-Geschoss [=projectile]). These projectiles have their origin in a hunting bullet patented for the founder of the assignee, Wilhelm Brenneke, on 11 Dec. 1920, by the German Patent Office under the number 370 908.
These projectiles are partial fragmentation projectiles having a casing or jacket of nickel-plated low-carbon or ingot steel that in a form-locking manner receives two lead cores, namely a softer nose core and a harder rear core. These projectiles obtain their name due to their base or bottom, which in the rear has a torpedo shape. These bases have interior ballistic advantages. The dual-core construction of the above-mentioned. Brenneke rifle bullets provide for an optimum release of energy in the target with a reliable spreading and depth effect. This occurs due to the rapidly occurring deformation and fragmentation of the front, soft lead core, while the rear, hard lead core in most cases leads to the desired exit wound. Characteristic for the TIG and TUG projectiles is a sharp edge that is formed in the region of the head of the projectile and that in most instances delivers cut hair and blood to the entry wound.
This line of development of the aforementioned type of partial fragmentation projectiles, i.e. with a soft nose core and a hard rear core, was maintained over nearly 100 years. Evidence of this is also a partial fragmentation projectile patented in 2007 (EP 1 214 560 B1). Involved here is a projectile that is free of lead. Proposed as metallic materials for these projectiles are copper, tin, zinc, iron, tungsten, titanium, silver, aluminum, tantalum, vanadium, and alloys of these metals.
It is an object of the present invention to provide an improved partial fragmentation bullet of the aforementioned general type that has a dual-core construction.
This object, and other objects and advantages of the present application, will appear more clearly from the following specification in conjunction with the accompanying schematic drawings, in which:
The partial fragmentation bullet of the present application comprises a nose core, which forms a fragmenting portion of the partial fragmentation bullet, and a rear core, which forms a penetration portion of the partial fragmentation bullet; the nose core and the rear core are made of materials having the same level of hardness or hardness value, with such level of hardness being in the Brinell hardness range (HBW). Thus, the partial fragmentation bullet of the present application breaks with the concept that was accepted and practiced for many decades, and which states that the nose core of partial fragmentation bullets must be softer than the rear core. However, with the partial fragmentation bullet of the present application, it has been surprisingly shown that it is also possible with nose cores and rear cores that have the same hardness to achieve the desired interior ballistics of bullets, namely a mushrooming and fragmentation of the nose core as well as an exit wound in most instances.
The solution of the present application makes it possible, pursuant to one advantageous embodiment of the invention, to use the same materials for the nose core and for the rear core, which results in considerable advantages in fabrication techniques during the manufacture of the bullet.
Pursuant to one advantageous embodiment of the present invention, the nose core and the rear core are made of tin.
When using materials for the rear core and the nose core having greater hardness values of up to 200 HBW it can be advantageous to provide mushrooming aids to enhance the mushrooming of the nose core. Such mushrooming aids can be in the form of hollow tips, through-bores that extend through the nose core in the longitudinal direction, or blind holes in which expanding bodies are placed.
Further specific features of the present application will be described in detail subsequently.DESCRIPTION OF SPECIFIC EMBODIMENTS
Referring now to the drawings in detail, the partial fragmentation projectile or bullet 1 shown in
With the partial fragmentation bullet 1 of
When the partial fragmentation bullet 1 of
The target ballistics of the partial fragmentation bullet 1 of
When the partial fragmentation bullet 1 of
The partial fragmentation bullets 1 of
With the partial fragmentation bullets 1 of
With the embodiment of
The specification incorporates by reference the disclosure of German priority document 10 2009 011 093.3 filed 3 Mar. 2009.
The present invention is, of course, in no way restricted to the specific disclosure of the specification and drawings, but also encompasses any modifications within the scope of the appended claims.
1. A partial fragmentation bullet (1), comprising:
- a nose core (2), wherein said nose core forms a fragmenting portion of said partial fragmentation bullet (1); and
- a rear core (3), wherein said rear core forms a penetration portion of said partial fragmentation bullet (1), further wherein said nose core (2) and said rear core (3) are made of materials having the same level of hardness, and wherein said level of hardness is in the Brinell hardness range.
2. A partial fragmentation bullet according to claim 1, wherein said level of hardness of said nose core (2) and said rear core (3) is a maximum Brinnel hardness of 200.
3. A partial fragmentation bullet according to claim 2, wherein said nose core (2) and said rear core (3) are made of the same materials.
4. A partial fragmentation bullet according to claim 3, wherein said nose core (2) and said rear core (3) are made of tin.