Lead free reduced ricochet limited penetration projectile

• US 7,353,756 B2
• Filed: 02/20/2004
• Issued: 04/08/2008
• Est. Priority Date: 04/10/2002
• Status: Expired due to Fees

• Current Assignee: John D. Leasure
• Original Assignee: Accutec Incorporated
• Inventors: LeaSure, John D.
• Primary Examiner(s): Bergin; James S
• Application Number:
  US10/783,066
• Publication Number:
  US 20040159262A1
• Time in Patent Office: 1,509 Days
• Field of Search: 102/506, 102/501, 102/517, 102/511
• US Class Current: 102/517
• CPC Class Codes: F42B 12/34 expanding before or on impact, i.e. of dumdum or mushroom type
• CPC Class Codes: F42B 12/74 of the core or solid body
• CPC Class Codes: F42B 12/745 the core being made of plastics; Compounds or blends of plastics and other materials, e.g. fillers

Abstract

A frangible projectile with a specific gravity similar to a lead projectile. The projectile comprises 34-94%, by weight, binder. The binder comprises poly ether block amide resin. The projectile further comprises 6-66%, by weight, ballast. The ballast comprises at least one member selected from a group consisting of tungsten, tungsten carbide, molybdenum, tantalum, ferro-tungsten, copper, bismuth, iron, steel, brass, aluminum bronze, beryllium copper, tin, aluminum, titanium, zinc, nickel silver alloy, cupronickel and nickel. The projectile can be prepared with a particularly preferred specific gravity of 5-14 and more preferably 11-11.5.

Claims

1. A projectile comprising a ballast encased in a binder wherein said binder comprises a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments and said projectile has a minimum specific gravity of 5.

2. The projectile of claim 1 comprising about 6 to about 66%, by weight, said ballast and about 34-94%, by weight, said binder.

3. The projectile of claim 2 comprising 45-49%, by weight, said ballast and 51-55%, by weight, said binder.

4. The projectile of claim 1 wherein said binder further comprises a second resin.

5. The projectile of claim 4 wherein said binder comprises about 10 to about 30%, by weight, said a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments and about 70 to about 90%, by weight, said second resin.

6. The projectile of claim 4 wherein said second resin is selected from a group consisting of nylon and polybutylene terephthalate.

7. The projectile of claim 4 wherein said ballast comprises at least one member selected from a group consisting of tungsten, tungsten carbide, molybdenum, tantalum, ferro-tungsten, copper, bismuth, iron, steel, brass, aluminum bronze, beryllium copper, tin, aluminum, titanium, zinc, nickel silver alloy, cupronickel and nickel.

8. The projectile of claim 7 wherein said ballast comprises at least one member selected from a group consisting of tungsten, tungsten carbide, tantalum, molybdenum and ferro-tungsten.

9. The projectile of claim 1 wherein said projectile has a minimum specific gravity of 10.

10. The projectile of claim 1 wherein said binder further comprises a fiber.

11. The projectile of claim 1 wherein said binder further comprises a lubricant.

12. The frangible projectile of claim 1 further comprising a plasticizer.

13. The frangible projectile of claim 12 wherein said plasticizer is a sulfonamide.

14. The frangible projectile of claim 13 wherein said plasticizer is an aromatic sulfonamide.

15. The frangible projectile of claim 14 wherein said plasticizer is n-butylbenzene sulfonamide.

16. A projectile comprising a ballast encased in a binder wherein said binder comprises a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments and said projectile has a minimum specific gravity of 5 wherein said ballast consist essentially of tungsten.

17. A frangible projectile comprising:

34-94%, by weight, binder wherein said binder comprises a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments; and

6-66%, by weight, ballast wherein said ballast comprises at least one member selected from a group consisting of tungsten, tungsten carbide, molybdenum, tantalum, ferro-tungsten, copper, bismuth, iron, steel, brass, aluminum bronze, beryllium copper, tin, aluminum, titanium, zinc, nickel silver alloy, cupronickel and nickel; and

wherein said projectile has a specific gravity of about 5 to about 14.

18. The frangible projectile of claim 17 wherein said projectile has a specific gravity of at least about 10.

19. The frangible projectile of claim 18 wherein said projectile has a specific gravity of about 11 to about 11.5.

20. The frangible projectile of claim 17 further comprising a second resin.

21. The frangible projectile of claim 20 wherein said second resin is selected from a group consisting of nylon and polybutylene terephthalate.

22. The frangible projectile of claim 20 wherein said second resin is nylon selected from a group consisting of nylon 6, nylon 6/6, nylon 11 and nylon 12.

23. The frangible projectile of claim 17 wherein said binder further comprises a fiber.

24. The frangible projectile of claim 23 wherein said fiber is an aramid.

25. The frangible projectile of claim 17 wherein said binder further comprises a lubricant.

26. The frangible projectile of claim 25 wherein said lubricant is at least one material chosen from a group consisting of molybdenum disulfide, silicone, polytetrafluoethylene and mineral oil.

27. A projectile comprising a ballast encased in a binder wherein said binder comprises a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments and said projectile has a minimum specific gravity of 5 wherein said ballast consist of tungsten carbide, molybdenum, tantalum, ferro-tungsten, copper, bismuth, iron, steel, brass, aluminum bronze, beryllium copper, tin, aluminum, titanium, zinc, nickel silver alloy, cupronickel and nickel.