IP Library Granted Patent US 9,383,178
Granted Patent B2
US 9,383,178 · App. 14/614,678 · Granted Jul 5, 2016

Hollow point bullet and method of manufacturing same

Inventor: Daniel L. Powers, Jr. (Thonotosassa, FL)
Assignee: Sig Sauer, Inc.
F42B12/34F42B12/78
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Quick Facts
Patent No.
US 9,383,178
App. No.
14/614,678
Granted
Jul 5, 2016
Kind
B2
Abstract

Hollow point bullets and methods of manufacturing such bullets are herein disclosed. The disclosed bullets include a monolithic core encased by a metal jacket. The jacket includes a plurality of v-shaped channels formed on the inner surface of the sidewall of the jacket. The core includes a conical recess formed therein and a cavity in communication with the conical recess. The cavity formed in the core may have a cross-section shape defined by a plurality of points spaced equidistantly about the circumference of an imaginary circle. A plurality of stress risers may be formed in the core, each stress riser extending from the cavity to a v-shaped channel in coincidence with a point of the cross-section shape of the cavity.

Claims (21)

1. A bullet comprising:

a center axis;

a substantially cylindrical core comprising:

a nose portion having a conical recess formed therein; the core having a cavity formed therein, the cavity extending along the center axis and in communication with the conical recess, the cavity having a cross-section shape defined by a plurality of points spaced equidistantly around a circumference of an imaginary circle; and

a plurality of stress risers formed in the core, each stress riser extending radially outward from the center axis in coincidence with a point of the cross-section shape; and

a jacket surrounding the core, the jacket comprising:

a base;

a sidewall comprising a top edge, an inner surface and an outer surface, the inner surface of the sidewall comprising a plurality of v-shaped channels formed therein, each v-shaped channel being adjacent to one of the stress risers and extending longitudinally from the top edge such that a distance from the inner surface of the sidewall to the outer surface of the sidewall increases as a function of distance from the top edge toward the base.

2. The bullet of claim 1 , wherein the cross-section shape comprises between 3 and 8 points.

3. The bullet of claim 1 , wherein the sidewall comprises between 3 and 8 v-shaped channels.

4. The bullet of claim 1 , wherein the core is a monolith.

5. The bullet of claim 1 , further comprising a plurality of indentations formed in the outer surface of the sidewall about a circumference of the jacket.

6. The bullet of claim 5 , wherein each indentation is angled with respect to the center axis such that a deeper portion of the indentation is closer to the base of the jacket and a shallower portion of the indentation is closer to the top edge of the jacket.

7. The bullet of claim 1 , wherein the conical recess has a 45 degree angle with respect to the center axis.

8. A bullet comprising:

a center axis;

a core; and

a jacket surrounding the core, the jacket comprising a base and a sidewall having a top edge, an outer surface, an inner surface, and a plurality of indentations formed in the outer surface about a circumference of the jacket, each indentation being angled with respect to the center axis such that a bottom portion of each indentation extends at least 50% more into the outer wall than a top portion of each indentation, wherein the inner surface of the sidewall comprises a plurality of v-shaped channels formed therein, each v-shaped channel extending longitudinally from the top edge such that a distance from the inner surface of the sidewall to the outer surface of the sidewall increases as a function of distance from the top edge toward the base.

9. The bullet of claim 8 , further comprising a plurality of stress risers formed in the core, each stress riser extending from the center axis to the inner surface of the jacket sidewall.

10. The bullet of claim 8 , wherein the core comprises a nose portion having a conical recess formed therein.

11. The bullet of claim 8 , further comprising a cavity extending at least partially into the core along the center axis.

Assignments (4)
SECURITY INTEREST Recorded Nov 10, 2021
From: SIG SAUER INC.
To: TD BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 058097/0345 →
SECURITY INTEREST Recorded Jan 5, 2016
From: SIG SAUER INC.
To: TD BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 037413/0047 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 9, 2015
From: D&M HOLDING COMPANY, LLC
To: SIG SAUER, INC.
Reel/Frame 035112/0632 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 6, 2015
From: POWERS, DANIEL L., JR.
To: D&M HOLDING COMPANY, LLC
Reel/Frame 035106/0523 →
Continuity (2)
Provisional Application 61936493 · Feb 6, 2014
Related Publication 20150308799A1 · Oct 29, 2015