IP Library Granted Patent US 9,194,676
Granted Patent B1
US 9,194,676 · App. 14/307,476 · Granted Nov 24, 2015

Hollow point bullet

Inventor: Kyle A. Masinelli (Staunton, IL)
Assignee: OLIN CORPORATION
F42B12/34F42B5/025
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Quick Facts
Patent No.
US 9,194,676
App. No.
14/307,476
Granted
Nov 24, 2015
Kind
B1
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 (24)

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 in 3 , 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 in 3 , and the blades comprise at least 20% of the volume of the volume.

Assignments (4)
SECURITY INTEREST Recorded May 19, 2026
From: OLIN CORPORATION; OLIN WINCHESTER, LLC
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT AND COLLATERAL MAY 19, 2026
Reel/Frame 074694/0881 →
RELEASE OF SECURITY INTEREST Recorded Jul 29, 2021
From: BANK OF AMERICA, N.A.
To: OLIN CORPORATION
Reel/Frame 057016/0561 →
SECURITY AGREEMENT Recorded Aug 7, 2020
From: OLIN CORPORATION
To: BANK OF AMERICA, N.A.
Reel/Frame 053436/0262 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 22, 2014
From: MASINELLI, KYLE A
To: OLIN CORPORATION
Reel/Frame 033366/0990 →