Frangible practice ammunition

• US 5,237,930 A
• Filed: 02/07/1992
• Issued: 08/24/1993
• Est. Priority Date: 02/07/1992
• Status: Expired due to Term

• Current Assignee: SNC Technologies, Inc. (General Dynamics Corporation)
• Original Assignee: SNC Industrial Technologies Incorporated
• Inventors: Belanger, Germain, Potvin, Marc
• Primary Examiner(s): Tudor, Harold J.
• Application Number:
  US07/831,263
• Time in Patent Office: 564 Days
• Field of Search: 102/395, 102/498, 102/501, 102/506, 102/529, 102/511, 102/517, 102/502
• US Class Current: 102/529
• CPC Class Codes: C22C 32/0094 with organic materials as the main non-metallic constituent, e.g. resin
• CPC Class Codes: F42B 12/745 the core being made of plastics; Compounds or blends of plastics and other materials, e.g. fillers

Abstract

The disclosure herein describes a frangible practice ammunition comprising a compacted mixture of fine copper powder and of a thermoplastic resin selected from the group consisting of nylon 11 and nylon 12. The mixture which is compacted by injection molding, has at least 90% by weight of copper and a specific gravity of 5.7.

Claims

1. A frangible practice ammunition comprising a compacted mixture of fine copper powder and of a thermo plastic resin selected from the group consisting of nylon 11 and nylon 12;

said copper powder being of at least 92% by weight;

said mixture having a minimum specific gravity of 5.7.

2. A frangible practice ammunition as defined in claim 1, wherein said mixture is an injection molded compacted material.

3. A frangible practice ammunition as defined in claim 1, wherein said copper powder consists of particles having a spheroidal shape.

4. A frangible practice ammunition as defined in claim 3, wherein a major portion of said particles have a size finer than 44 μ

m.

5. A frangible practice ammunition as defined in claim 1, wherein said resin is a fine powder having a size of less than 80μ

.

6. A frangible practice ammunition as defined in claim 1, wherein said fine copper powder is about 92.5-93.5% by weight.

7. A frangible practice ammunition as defined in claim 6, wherein said thermoplastic resin is about 6.5-7.5% by weight.

8. A frangible practice ammunition as defined in claim 1, further comprising a lubricant.

9. A frangible practice ammunition as defined in claim 1, further comprising a wetting agent.

10. A frangible practice ammunition as defined in claim 1, wherein said mixture has a weight of up to 36 grains for a 5.56 mm calibre.

11. A frangible practice ammunition as defined in claim 1, wherein said mixture has a weight of up to 85 grains for a 9 mm calibre.