Conic taper tip fracturing projectiles

• US 9,797,696 B2
• Filed: 02/18/2015
• Issued: 10/24/2017
• Est. Priority Date: 08/14/2014
• Status: Expired due to Fees

• Current Assignee: Oath Corporation
• Original Assignee: Oath Corporation
• Inventors: Golloher, David Martin, Terkeurst, Leonard William
• Primary Examiner(s): DAVID, MICHAEL D
• Application Number:
  US14/625,097
• Publication Number:
  US 20160265889A1
• Time in Patent Office: 979 Days
• Field of Search: 102501, 102506-510, 102516, 102517
• CPC Class Codes: F42B 12/24 with grooves, recesses or other wall weakenings F42B12/26, F42B12/28 take precedence
• CPC Class Codes: F42B 12/34 expanding before or on impact, i.e. of dumdum or mushroom type

Abstract

Various embodiments of projectiles are described. In one embodiment, a projectile includes a projectile core having a central recess formed therein, the central recess including a conical recess portion and a cylindrical recess portion. According to certain aspects, the projectile core may include a core base, and the central recess of the projectile core may extend from a leading circumferential rim of the projectile core to the core base along an axis of symmetry of the projectile core. The projectile core may further include projectile fingers each separated by a kerf, extending longitudinally from the core base to the leading circumferential rim, and extending radially apart from the axis of symmetry between an outer periphery of the central recess to an outer periphery surface of the core, and a nylon tip including a spherical nose, a conical taper portion, and a cylindrical anchor pin.

Claims

1. A projectile, comprising:

a projectile core having a central recess formed therein, the central recess including a conical recess portion and a cylindrical recess portion, the projectile core comprising;

a core base, wherein the central recess extends from a circumferential meplat rim of the projectile core to the core base along an axis of symmetry of the projectile core; and

a plurality of projectile fingers each separated by a kerf, the plurality of projectile fingers extending longitudinally from the core base to the circumferential meplat rim, extending radially away from the axis of symmetry between the central recess and an outer periphery surface of the projectile core, and transitioning at an angle between the conical recess portion and the cylindrical recess portion; and

a tip including a nose, a conical taper portion, and a cylindrical anchor pin, the tip transitioning at an angle between the conical taper portion and the cylindrical anchor pin of the tip, wherein

the angle between the conical recess portion and the cylindrical recess portion of the projectile core is substantially equivalent to the angle between the conical taper portion and the cylindrical anchor pin of the tip;

each of the plurality of projectile fingers includes a plurality of surfaces,

at least two of the plurality of surfaces are substantially flat,

at least another two of the plurality of surfaces are curved, and

along the axis of symmetry, the core base extends less than thirty percent of a length of the projectile core such that, upon impact of the projectile, the entire core base fractures into a plurality of sections along with the plurality of projectile fingers.

2. The projectile according to claim 1, wherein

the cylindrical anchor pin of the tip is lodged inside the cylindrical recess portion of the central recess, and

the conical taper portion of the tip substantially occupies the conical recess portion of the central recess.

3. The projectile according to claim 1, wherein:

an inner surface of each of the plurality of projectile fingers includes a partial conical surface along the central recess; and

an outer periphery surface of each of the plurality of projectile fingers includes a length of bearing surface and a length of ogive surface.

4. The projectile according to claim 1, wherein the projectile core is formed from a single piece of stock material.

5. The projectile according to claim 4, wherein the projectile core is formed from brass or bronze and the core base fractures into sections along with the plurality of projectile fingers upon impact of the projectile.

6. The projectile according to claim 1, wherein the nose of the tip is substantially semispherical.

7. The projectile according to claim 1, wherein the nose of the tip is substantially flat.

8. The projectile according to claim 1, wherein the core base fractures into sections along with the plurality of projectile fingers upon impact of the projectile.

9. The projectile according to claim 1, wherein the angle between conical taper portion and the cylindrical anchor pin of the tip is about 135 degrees.

10. A projectile, comprising:

a projectile core having a central recess formed therein, the central recess including a conical recess portion and a cylindrical recess portion, the projectile core comprising;

a core base, wherein the central recess extends from a circumferential meplat rim of the projectile core to the core base along an axis of symmetry of the projectile core; and

a plurality of projectile fingers separated from each other, the plurality of projectile fingers extending longitudinally from the core base to the circumferential meplat rim and transitioning at an angle between the conical recess portion and the cylindrical recess portion; and

a tip including a nose, a conical taper portion, and a cylindrical anchor pin, the tip transitioning at an angle between the conical taper portion and the cylindrical anchor pin, wherein

the angle between the cylindrical recess portion and the conical recess portion of the projectile core is substantially equivalent to the angle between the conical taper portion and the cylindrical anchor pin of the tip;

each of the plurality of projectile fingers includes a plurality of surfaces,

at least two of the plurality of surfaces are substantially flat,

at least another two of the plurality of surfaces are curved, and

along the axis of symmetry, the core base extends less than thirty percent of a length of the projectile core such that, upon impact of the projectile, the entire core base fractures into a plurality of sections along with the plurality of projectile fingers.

11. The projectile according to claim 10, wherein the plurality of projectile fingers extend radially away from the axis of symmetry between the central recess and an outer periphery surface of the projectile core.

12. The projectile according to claim 10, wherein the conical taper portion of the tip substantially occupies the conical recess portion of the central recess.

13. The projectile according to claim 10, wherein

the projectile core further comprises a plurality of undercuts about an outer periphery of the projectile core, and

a kerf separates each of the plurality of projectile fingers and extends longitudinally from the circumferential meplat rim of the projectile core toward the core base and across at least one of the plurality of undercuts.

14. A projectile, comprising:

a projectile core having a central recess formed therein, the central recess including a conical recess portion and a cylindrical recess portion, the projectile core comprising;

a core base, wherein the central recess extends from a circumferential meplat rim of the projectile core to the core base along an axis of symmetry of the projectile core; and

a plurality of projectile fingers separated from each other, the plurality of projectile fingers extending longitudinally from the core base to the circumferential meplat rim and transitioning at an angle between the conical recess portion and the cylindrical recess portion; and

a tip including a nose, a conical taper portion, and a cylindrical anchor pin, the tip transitioning at an angle between the conical taper portion and the cylindrical anchor pin, wherein

the projectile core is formed from a single piece of brass or bronze stock material,

each of the plurality of projectile fingers includes a partial conical surface,

the angle between the cylindrical recess portion and the conical recess portion of the projectile core is substantially equivalent to the angle between the conical taper portion and the cylindrical anchor pin of the tip, and

along the axis of symmetry, the core base extends less than thirty percent of a length of the projectile core such that, upon impact of the projectile, the entire core base fractures into a plurality of sections along with the plurality of projectile fingers.

15. The projectile according to claim 14, wherein the plurality of projectile fingers extend radially away from the axis of symmetry between the central recess and an outer periphery surface of the projectile core.

16. The projectile according to claim 14, wherein the conical taper portion of the tip substantially occupies the conical recess portion of the central recess.