Lead-free bullett

• US 5,399,187 A
• Filed: 09/23/1993
• Issued: 03/21/1995
• Est. Priority Date: 09/23/1993
• Status: Expired due to Term

• Current Assignee: OLIN Corporation
• Original Assignee: OLIN Corporation
• Inventors: Violette, Gerald N., Mahulikar, Deepak, Mravic, Brian, Shapiro, Eugene, Halverson, Henry J.
• Primary Examiner(s): Walsh, Donald P.
• Assistant Examiner(s): JENKINS, DANIEL J
• Application Number:
  US08/125,946
• Time in Patent Office: 544 Days
• Field of Search: 102/445, 102/448, 102/459, 102/506, 102/514, 102/517, 75/228, 75/230, 75/248
• US Class Current: 75/228
• CPC Class Codes: B22F 1/09 Mixtures of metallic powders
• CPC Class Codes: B22F 1/12 Metallic powder containing non-metallic particles containing lubricating or binding agents or organic material B22F1/10
• CPC Class Codes: C22C 32/0094 with organic materials as the main non-metallic constituent, e.g. resin
• 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
• CPC Class Codes: F42B 7/046 Pellets or shot therefor

Abstract

A composite lead-free bullet is disclosed comprising a heavy constituents selected from the group of tungsten, tungsten carbide, carballoy, and ferro-tungsten and a second binder constituent consisting of either a metal alloy or a plastic blend.

Claims

1. A lead free bullet, comprising:

a compacted composite containing a high-density first constituent selected from the group consisting of tungsten, tungsten carbide, ferro-tungsten and mixtures thereof; and

a lower density second constituent selected from the group consisting of tin, zinc, aluminum, iron, copper, bismuth and mixtures thereof, wherein the density of said lead free bullet is in excess of 9 grams per cubic centimeter and said lead free bullet deforms or disintegrates at a yield stress of less than about 45,000 psi.

2. The lead free bullet of claim 1 further including a polymer binder.

3. The lead free bullet of claim 2 wherein said polymer binder is selected from the group consisting of acrylics and polystyrenes.

4. The lead free bullet of claim 1 coated with a jacket selected from the group consisting of tin, zinc, copper, brass and plastic.

5. The lead free bullet of claim 4 coated with a brass jacket.

6. The lead free bullet of claim 3 coated with a jacket selected from the group consisting of tin, zinc, copper, brass and plastic.

7. The lead free bullet of claim 6 wherein said jacket is plastic.

8. The lead free bullet of claim 7 wherein said jacket is formed from the same plastic as said polymer binder.