An armour piercing bullet

Abstract

The present invention relates to armour piercing bullets, especially to precision machined armour piercing bullets. A bullet (1) comprises a bullet housing (10), a core (20) and a tip (30). The bullet housing (10) comprises: a first hole (12) formed starting from the truncated front part (11) of the bullet housing (10); a second hole (13) formed at the end surface of the first hole (12), and a third hole (14) formed at the end surface of the second hole (13). The core (20) mounted into said holes (12; 13; 14). The tip (30) comprises a front part (31) and a back part (32) and is configured to be mountable into the first hole (12) of the bullet housing (10) and onto the part of the core (20).

Description

[0001] AN ARMOUR PIERCING BULLET

[0002] DESCRIPTION

[0003] Field of the invention

[0004]

[0001] The present invention relates to armour piercing bullets, especially to precision machined armour piercing bullets.

[0005] Background of the invention

[0006]

[0002] There are various types of bullets having armour piercing effect in the prior art. Such bullets are described in German patent publications Nos. DE205734, DE 211778 and DE4016051, as well as in German patent application publications Nos. DE 4024543 and DE 3023220. Similar designs are disclosed in the US patent publications Nos. US5794320 and US7520224. The bullets should not have only armour piercing properties, but these bullets must be precise for achieving better long-range and penetrating power at large distances.

[0007]

[0003] It is therefore an object of the invention to improve the bullet described above so that its efficiency in armour piercing and precision is improved.

[0008] Summary of the invention

[0009]

[0004] This aim of the invention is to design a bullet with improved armour piercing and precision characteristics.

[0010]

[0005] The aim is achieved by design of the bullet comprising a bullet housing and a core inserted within the bullet housing, and a tip also inserted in the bullet housing and covering the core from one of its sides or ends in the bullet housing.

[0011]

[0006] The bullet housing having outer profile and truncated front part. The outer profile of the bullet housing is formed in the typical shape or profile of the known bullets. The only distinctive difference is a truncated front part. The truncated front part facilitates during manufacturing process, especially drilling of the first hole in the bullet housing.

[0007] The bullet housing comprises a stepped and blind hole, where each step of the hole may be defined as separate hole - a first hole, a second hole and a third hole, respectively. The first hole of the bullet housing is formed starting from the truncated front part of the bullet housing and a central axis of the first hole coincides with a central axis of the bullet housing. The second hole the bullet housing is formed at the end surface of the first hole and a central axis of the second hole coincides with the central axis of the bullet housing. A diameter of the second hole is smaller than a diameter of the first hole. The third hole of the bullet housing is formed at the end surface of the second hole and a central axis of the third hole coincides with the central axis of the bullet housing. A diameter of the third hole is smaller than the diameter of the second hole.

[0012]

[0008] The core is a bar like member having two flat ends. The bar is mountable into the first hole, the second hole and the third hole. The diameter of the core is smaller than the diameter of the first hole and the diameter of the second hole of the bullet housing, but larger than the diameter of the third hole of the bullet housing so that the core in the third hole of the bullet housing is arranged in the formfitting manner.

[0013]

[0009] The tip comprises a front part and a back part. The back part comprises a hole and an outer diameter of the back part of the tip is smaller than the diameter of the first hole of the bullet housing so that the tip is mountable into the first hole of the bullet housing and onto the one end of the core with its hole in the back part.

[0014]

[0010] The tip may be made of titanium or titanium alloy. The bullet housing may be made of brass, cooper, or copper alloy. The core may be made of tungsten carbide or cobalt-chrome alloy.

[0015] Brief description of the drawings

[0016]

[0011] The figures illustrate generally, by way of example, but not by way of limitation, various embodiments of the invention.

[0017]

[0012] Fig. 1 illustrates a bullet (1) comprising a bullet housing (10) and a tip (30) partly inserted into the bullet housing (10).

[0013] Fig. 2 illustrates the bullet housing (10) as a part of the bullet (1) shown in Fig. 1.

[0018]

[0014] Fig. 3 illustrates a core (20) insertable in the bullet housing (10).

[0019]

[0015] Fig. 4 illustrates a tip (30) as a part of the bullet (1) shown in Fig. 1.

[0020]

[0016] Fig. 5 illustrates a cross-section of the bullet (1) as shown in Fig 1.

[0021]

[0017] Fig. 6 illustrates a cross-section of bullet housing (10) as a part of the bullet (1) shown in Figs. 1 and 5.

[0022]

[0018] Fig. 7 illustrates a cross-section of tip (30) as a part of the bullet (1) shown in Figs. 1 and 5.

[0023]

[0019] Fig. 8 illustrates another embodiment of a bullet (1).

[0024] Detailed description of the embodiments

[0025]

[0020] Fig. 1 illustrates a bullet (1) comprising a bullet housing (10) and a tip (30) partly inserted into the bullet housing (10). Fig. 2 illustrates the bullet housing (10) as a part of the bullet (1) shown in Fig. 1. The bullet housing (10) having outer profile and a truncated front part (11). As a symmetric rotational object, the bullet housing (10) has it own central axis (IX). Fig. 3 illustrates a core (20) insertable in the bullet housing (10). As a symmetric rotational object, the core (20) has its own central axis (2X). The core (20) has its own diameter (D20). Moreover, the core (20) from both its ends has a flat end surface. The core (20) cannot be seen in Fig. 1 as it is inserted into the bullet housing (10) and one of its ends is covered by the tip (30). Fig. 4 illustrates the same tip (30) as a part of the bullet (1). The tip (30) comprises a front part (31) and a back part (32). The back part (32) of the tip (30) is mountable into the bullet housing (10) and onto the one end of the core (20) within the bullet housing (10). As a symmetric rotational object, the tip (30) has its own central axis (3X). Upon assembly the central axis (3X) of the tip (30), the central axis (2X) of the core (20) and the central axis (IX) of the bullet housing (10) are aligned. In the present embodiment, the tip (30) is made of titanium alloy, the bullet housing (30) is made of brass, and the core (20) is made of tungsten carbide.

[0026]

[0021] Fig. 5 illustrates a cross-section of the bullet (1) as shown in Fig 1, where it is clearly seen, how the core (20) is inserted into the bullet housing (10) and covered from one side with the tip (30).

[0027]

[0022] Fig. 6 illustrates a cross-section of bullet housing (10) as a part of the bullet (1) shown in Figs. 1 and 5. The bullet housing (10) comprises a first hole (12), a second hole (13) and a third hole (14). The first hole (12) is formed starting from the truncated front part (11) of the bullet housing (10) and a central axis of the first hole (12) coincides with a central axis (IX) of the bullet housing (10). The second hole (13) formed at the end surface of the first hole (12) and a central axis of the second hole (13) coincides with the central axis (IX) of the bullet housing (10). A diameter (D2) of the second hole (13) is smaller than a diameter (DI) of the first hole (12). The third hole (14) formed at the end surface of the second hole (13) and a central axis of the third hole (14) coincides with the central axis (IX) of the bullet housing (10). A diameter (D3) of the third hole (14) is smaller than the diameter (D2) of the second hole (13). The core (20) as seen in Fig. 5 is mounted into the first hole (12), the second hole (13) and the third hole (14). The diameter (D20) of the core (20) is smaller than the diameter (DI) of the first hole (12) and the diameter (D2) of the second hole (13), but larger than the diameter (D3) of the third hole (14) so that the core (20) in the third hole (14) of the bullet housing (10) is arranged in the formfitting manner.

[0028]

[0023] Fig. 7 illustrates a cross-section of tip (30) as a part of the bullet (1) shown in Figs. 1 and 5. The tip (30) comprises the front part (31) and the back part (32). The back part (32) comprises a hole (33). An outer diameter (D31) of the back part (32) of the tip (30) is smaller than the diameter (DI) of the first hole (12) the bullet housing (10) so that the tip (30) is mountable into the first hole (12) the bullet housing (10) and onto the part or end of the core (20), where the hole (33) of the tip (30) encloses one end of the core (20).

[0029]

[0024] Fig. 8 illustrates another embodiment of the armour piercing bullet (1) with the same principles as seen in Figs. 1 to 7, which is having a bullet housing (10), a core (20) inserted in the bullet housing (10), and a tip (30) covering the front part of the bullet housing (10) and the core (20). The weight of this bullet (1) is 777 grains and calibre is .50. The length of the bullet (1) is 69.1 mm and the outer diameter of the bullet (1) or the bullet housing (10) is 12.95 mm. In tests a maximum dispersion of less than 3 MOA was reached. Ballistic coefficient of the bullet (1) under G1 is 1.022 and G7 is 0.518.

[0030]

[0025] While the invention may be susceptible to various modifications and alternative forms, specific embodiments of which have been shown by way of example in the figures and have been described in detail herein, it should be understood that the invention is not intended to be limited to the particular forms disclosed. Rather, the invention includes all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the following claims.

Claims

CLAIMS1. A bullet (1) comprising:- a bullet housing (10) having outer profile and a truncated front part (11), wherein the bullet housing (10) comprises: a first hole (12) formed starting from the truncated front part (11) of the bullet housing (10) and a central axis of the first hole (12) coincides with a central axis (IX) of the bullet housing (10), a second hole (13) formed at the end surface of the first hole (12) and a central axis of the second hole (13) coincides with the central axis (IX) of the bullet housing (10), wherein a diameter (D2) of the second hole (13) is smaller than a diameter (DI) of the first hole (12), a third hole (14) formed at the end surface of the second hole (13) and a central axis of the third hole (14) coincides with the central axis (IX) of the bullet housing (10), wherein a diameter (D3) of the third hole (14) is smaller than the diameter (D2) of the second hole (13);- a core (20) mounted into the first hole (12), the second hole (13) and the third hole (14), wherein the diameter (D20) of the core (20) is smaller than the diameter (DI) of the first hole (12) and the diameter (D2) of the second hole (13), but larger than the diameter (D3) of the third hole (13) so that the core (20) in the third hole (14) is arranged in the formfitting manner; and- a tip (30) comprising a front part (31) and a back part (32), wherein the back part (32) comprises a hole (33) and an outer diameter (D31) of the back part (32) of the tip (30) is smaller than the diameter (DI) of the first hole (12) so that the tip (30) is mountable into the first hole (12) of the bullet housing (10) and onto the part of the core (20) with its hole (33).

2. The bullet (1) according to Claim 1, wherein the tip (30) is made of titanium or titanium alloy.

3. The bullet (1) according to Claim 1 or 2, wherein the bullet housing (30) is made of brass, cooper, or copper alloy.

4. The bullet (1) according to any preceding Claim 1 to 3, wherein the core (20) is made of tungsten carbide or cobalt-chrome alloy.

5. The bullet (1) according to any preceding Claim 1 to 4, wherein the core (20) from both its ends has a flat end surface.

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