Hollow point bullet

• US 9,194,676 B1
• Filed: 06/17/2014
• Issued: 11/24/2015
• Est. Priority Date: 06/17/2014
• Status: Active Grant

• Current Assignee: OLIN Corporation
• Original Assignee: OLIN Corporation
• Inventors: Masinelli, Kyle A.
• Primary Examiner(s): Hayes, Bret
• Application Number:
  US14/307,476
• Publication Number:
  US 20150362303A1
• Time in Patent Office: 525 Days
• Field of Search: 102/439, 102507-510, 102/514
• US Class Current: 1/1
• CPC Class Codes: F42B 12/34 expanding before or on impact, i.e. of dumdum or mushroom type
• CPC Class Codes: F42B 5/025 characterised by the dimension of the case or the missile

Abstract

A bullet having a metal jacket, having a generally cylindrical aft section, a tapering forward section, and an open front. A soft, dense, metal core is disposed in the metal jacket. The core has a cavity generally aligned with the open front of the jacket, with a plurality of blades extending forwardly into the cavity, each terminating in a front face at or spaced rearwardly of the forward edge of the metal jacket.

Claims

1. A bullet comprising:

a metal jacket, having a generally cylindrical aft section, a tapering forward section, and an open front;

a soft, dense, metal core disposed in the metal jacket, the core having a cavity generally aligned with the open front of the metal jacket, with a plurality of blades extending forwardly into the cavity, each terminating in a front face spaced rearwardly of a forward-most edge of the metal jacket.

2. The bullet according to claim 1 wherein there are at least three blades, each oriented along radius of the cavity.

3. The bullet according to claim 2 wherein the blades are equally angularly spaced.

4. The bullet according to claim 3 wherein there are four blades.

5. The bullet according to claim 1 wherein the front faces of the blades are spaced between about 0 and about 0.125 inches from the forward most edge of the opening in the jacket.

6. The bullet according to claim 1 wherein the area of the front faces of the blades comprises between about 35% and about 55% of the cross-sectional area of the cavity in the plane of the front faces of the blades.

7. The bullet according to claim 1 wherein the blades have a height of between about 0.060 and about 0.200 inches.

8. The bullet according to claim 1 wherein the blades have a height of between about 30% and about 100% of the distance between the bottom of the cavity and the forward-most edge of the opening in the jacket.

9. The bullet according to claim 1 wherein the jacket comprises copper or a copper alloy.

10. The bullet according to claim 1 wherein the core comprises lead or a lead alloy.

11. The bullet according to claim 1 wherein the cavity has a volume of at least 0.0015 in³, and the blades comprise at least 20% of the volume.

12. A bullet comprising:

a metal jacket, having a generally cylindrical aft section, a tapering forward section, and an open front;

a soft, dense, metal core disposed in the metal jacket, the core having a cavity generally aligned with the open front, with a plurality of blades extending forwardly into the cavity, each oriented along radius of the cavity and equally angularly spaced from each other, the blades terminating in a front face spaced rearwardly of a forward-most edge of the metal jacket.

13. The bullet according to claim 12 wherein there are four blades.

14. The bullet according to claim 12 wherein the front faces of the blades are spaced between about 0 and about 0.125 inches from the forward-most edge of the opening in the jacket.

15. The bullet according to claim 14 wherein the area of the front faces of the blades comprises between about 35% and about 55% of the cross-sectional area of the cavity in the plane of the front faces of the blades.

16. The bullet according to claim 14 wherein the blades have a height of between about 0.060 and about 0.200 inches.

17. The bullet according to claim 14 wherein the blades have a height of between about 30% and about 100% of the distance between the bottom of the cavity and the forward-most edge of the opening in the jacket.

18. The bullet according to claim 14 wherein the jacket comprises copper or a copper alloy.

19. The bullet according to claim 18 wherein the core comprises lead or a lead alloy.

20. The bullet according to claim 14 wherein the cavity has a volume of at least 0.0015 in³, and the blades comprise at least 20% of the volume of the volume.