Heat-mitigating nose insert for a projectile and a projectile containing the same

Patent metadata

Field	Value
Publication number	US-10101137-B2
Application number	US-201815870400-A
Country	US
Kind code	B2
Filing date	Jan 12, 2018
Priority date	Jan 12, 2017
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

Techniques and devices are disclosed for a nose insert and a projectile that include a polymer nose element and a metal tip. The polymer nose element includes a tapered head portion and a first shank portion attached to the tapered head portion. The tapered head portion includes a cavity disposed therein. The first shank portion includes a first diameter smaller than a width of the tapered head portion adjacent to the first shank portion. The metal tip disposed in the tapered head portion of the polymer nose element and includes a tapered end and a second shank portion attached to the tapered end. The second shank portion having a second diameter smaller than a width of the tapered end adjacent to the second shank portion. The second shank portion being received in the cavity within the tapered head portion of the polymer nose element.

First claim

What is claimed is:

1. A nose insert for use in a projectile comprising:
a polymer nose element including a tapered head portion and a first shank portion attached to the tapered head portion, the tapered head portion includes a cavity disposed therein, and the first shank portion includes a first diameter smaller than a width of the tapered head portion adjacent to the first shank portion; and
a metal tip disposed in the tapered head portion of the polymer nose element, the metal tip includes a tapered end and a second shank portion attached to the tapered end, and the second shank portion having a second diameter smaller than a width of the tapered end adjacent to the second shank portion, wherein the second shank portion is received in the cavity within the tapered head portion of the polymer nose element.

2. The nose insert of claim 1 , wherein a largest width of the tapered head portion of the polymer nose element forms a shoulder in a plane perpendicular to an axis of the polymer nose element.

3. The nose insert of claim 1 , wherein the tapered head portion of the polymer nose element is ogival in shape and terminates in a flat face at a forward end of the polymer nose element.

4. The nose insert of claim 1 , wherein the tapered end of the metal tip is ogival in shape and terminates in a meplat at a forward end of the metal tip.

5. The nose insert of claim 1 , wherein an ogive radius for an outer surface profile of the tapered head portion of the polymer nose element and an outer surface profile of a tapered point of the metal tip are the same.

6. The nose insert of claim 1 , wherein the second diameter of the second shank portion of the metal tip is larger than an inside diameter of the cavity of the polymer nose element.

7. The nose insert of claim 1 , wherein the metal tip is made from one of aluminum, aluminum alloy copper, a copper alloy, bronze, brass, mild steel, stainless steel or any metal having a melt temperature of at least 1200 degrees F.

8. The nose insert of claim 1 , wherein the metal tip can withstand stagnation temperatures of between 1,200 and 2,700 degrees F. during flight of the projectile without deformation of the nose insert.

9. The nose insert of claim 1 , wherein a largest width of the tapered end of the metal tip forms a shoulder in a plane perpendicular to an axis of the metal tip.

10. The nose insert of claim 9 , wherein the shoulder of the metal tip includes an underside in contact with a flat face of the polymer nose element.

11. The nose insert of claim 1 , wherein the second shank portion of the metal tip is in contact with a bottom surface of the cavity of the polymer nose element.

12. A projectile comprising:
a unitary body including a first end and a second end, the first end including a first cavity; and
a nose insert disposed in the unitary body, the nose insert comprising
a polymer nose element disposed within the unitary body, the polymer nose element including a tapered head portion and a first shank portion attached to the tapered head portion, the tapered head portion includes a second cavity disposed therein, and the first shank portion includes a first diameter smaller than a width of the tapered head portion adjacent to the first shank portion, wherein the first shank portion is received in the first cavity of the unitary body, and
a metal tip disposed in the tapered head portion of the polymer nose element, the metal tip includes a tapered end and a second shank portion attached to the tapered end, the second shank portion having a second diameter smaller than a width of the metal tip adjacent to the second shank portion, wherein the second shank portion is received in the second cavity within the tapered head portion of the polymer nose element.

13. The projectile of claim 12 , further comprising an ogive radius for each of an outer surface profile of the tapered head portion of the polymer nose element and an outer surface profile of a jacketed portion of the projectile, wherein the ogive radius is the same for each of the outer surface profile of the tapered head portion of the polymer nose element and the outer surface profile of a jacketed portion of the projectile.

14. The projectile of claim 12 , further comprising an ogive radius for each of an outer surface profile of the tapered head portion of the polymer nose element and an outer surface profile of the tapered end of the metal tip, wherein the ogive radius is the same for each of the outer surface profile of the tapered head portion of the polymer nose element and the outer surface profile of the tapered end of the metal tip.

15. The projectile of claim 12 , further comprising an ogive radius for each of an outer surface profile of the tapered head portion of the polymer nose element, an outer surface profile of the tapered end of the metal tip, and an outer surface profile of a jacketed portion of the projectile, wherein the ogive radius is the same for each of the outer surface profile of the tapered head portion of the polymer nose element, the outer surface profile of the tapered end of the metal tip, and the outer surface profile of a jacketed portion of the projectile.

16. The projectile of claim 12 , wherein the unitary body further comprises a core that defines the first cavity, the first cavity being a cylindrical cavity concentric with an axis of the projectile.

17. The projectile of claim 12 , wherein the unitary body further comprises a forward portion that defines an opening to the first cavity, the forward portion in contact with the first shank portion of the polymer nose element so as to secure the nose insert to the unitary body.

18. The projectile of claim 12 , wherein the nose insert is disposed within the unitary body, such that a rear surface of the first shank portion of the polymer nose element is not in contact with a bottom surface of the first cavity of the unitary body.

19. The projectile of claim 18 , wherein in response to impact of the projectile with a target, the nose insert is configured to move rearward within the first cavity of the unitary body to expand the projectile.

Assignees

• Sig Sauer Inc

Inventors

• Burczynski Thomas J

Classifications

• F42B12/34

  expanding before or on impact, i.e. of dumdum or mushroom type · CPC title

• F42B12/72

  characterised by the material (heat treatment for explosive shells C21D9/16) · CPC title

• F42B10/46 Primary

  Streamlined nose cones; Windshields; Radomes {(F42B12/105 takes precedence)} · CPC title

• F42B12/74

  of the core or solid body · CPC title