Barrier-blind, limited collateral damage projectile

• US 9,829,293 B2
• Filed: 01/12/2016
• Issued: 11/28/2017
• Est. Priority Date: 01/12/2016
• Status: Active Grant

• Current Assignee: Black Hills Ammunition Incorporated, Lehigh Defense, LLC (Wilson's Gun Shop, Inc.)
• Original Assignee: Black Hills Ammunition Incorporated, Lehigh Defense, LLC (Wilson's Gun Shop, Inc.)
• Inventors: Fricke, David B., Hoffman, Jeff
• Primary Examiner(s): HAYES, BRET C
• Application Number:
  US14/993,895
• Publication Number:
  US 20170199020A1
• Time in Patent Office: 686 Days
• Field of Search: 102501, 102502, 102506, 102513, 102529, D22116
• CPC Class Codes: F42B 12/04 of armour-piercing type

Abstract

A projectile has a body with three fins which partially define a meplat. Three flutes are alternatingly arranged with the three fins about an axis of the body. Each of the three flutes is at least partially defined by a curved surface having a substantially smooth radius of curvature that is substantially constant from the meplat to a side surface of the body.

Claims

1. A projectile comprising:

a body having three fins, wherein the three fins at least partially define;

a meplat; and

three flutes alternatingly arranged with the three fins about an axis of the body;

wherein each fin has a curved surface extending from the meplat to a side surface of the body; and

wherein each of the three flutes is at least partially defined by the curved surface of the fins having a substantially smooth radius of curvature that is substantially constant from the meplat to the side surface.

2. The projectile of claim 1, wherein the meplat comprises a meplat surface substantially orthogonal to the axis.

3. The projectile of claim 2, wherein the meplat comprises a meplat portion extending substantially along the axis and away from the meplat surface.

4. The projectile of claim 1, wherein each of the three flutes is at least partially defined by two curved surfaces, wherein the two curved surfaces intersect at an intersection curve defined by the radius of curvature.

5. The projectile of claim 1, wherein the body has a maximum outside diameter and the meplat has a meplat diameter about 50% of the maximum outside diameter.

6. The projectile of claim 5, wherein each of the three flutes defines a flute length between about 50% to about 55% of a body length.

7. The projectile of claim 6, wherein each of the three flutes defines a flute length between about 52% of the body length.

8. The projectile of claim 1, wherein each flute has an included angle of about 120°

.

9. A projectile comprising:

a meplat surface;

a base surface; and

a body having an outer surface, the body extending along an axis from the meplat surface to the base surface, wherein the body comprises a plurality of fins, wherein each of the plurality of fins is defined by;

the meplat surface;

the outer surface; and

a pair of curved surfaces, wherein adjacent curved surfaces of adjacent fins intersect at an intersection curve disposed radially equidistant from the adjacent fins.

10. The projectile of claim 9, wherein adjacent curved surfaces of adjacent fins define a substantially symmetrical flute.

11. The projectile of claim 10, wherein the body defines two flutes, wherein each flute has an included angle of about 150°

.

12. The projectile of claim 10, wherein the body defines three flutes, wherein each flute has an included angle of about 120°

.

13. The projectile of claim 10, wherein the body defines four flutes, wherein each flute has an included angle of about 90°

.

14. The projectile of claim 10, wherein the body has a maximum outer diameter of about 0.50″

and at least one curved surface has a radius of about 0.3125″

.

15. The projectile of claim 10, wherein the body has a maximum outer diameter of about 0.50″

and at least one flute has a flute volume of about 0.216 cc.

16. A projectile comprising:

a body comprising;

an axis;

a meplat substantially orthogonal to the axis;

a plurality of substantially symmetrical fins defining and separated by a plurality of substantially symmetrical flutes; and

wherein each flute is formed by two curved surfaces of the fins that intersect at an intersection curve.

17. The projectile of claim 16, wherein, at a leading point, the two curved surfaces comprise substantially similar radii of curvature.

18. The projectile of claim 16, wherein each of the plurality of substantially symmetrical flutes is symmetrical about the intersection curve.

19. The projectile of claim 16, wherein the plurality of substantially symmetrical flutes comprises three substantially symmetrical flutes.

20. The projectile of claim 16, wherein each of the plurality of symmetrical fins comprises a chisel.