IP Library Granted Patent US 8,307,766
Granted Patent B2
US 8,307,766 · App. 12/784,664 · Granted Nov 13, 2012

Drag effect trajectory enhanced projectile

Assignee: Liberty Ammunition, Inc.
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Quick Facts
Patent No.
US 8,307,766
App. No.
12/784,664
Granted
Nov 13, 2012
Kind
B2
Abstract

A projectile includes a cartridge and a hollow bullet. A propellant fills the cartridge and the hollow bullet to increase the velocity of the bullet when fired. The hollow bullet has a flattened leading end and an annular ring is secured to the flattened leading end in the center of the flat region. The flattened leading end and the annular ring move a center of pressure forwardly so that a center of pressure is forward of a center of gravity of the bullet when the bullet is in flight. In a second embodiment, a plurality of circumferentially spaced apart slits is formed in a trailing end of the hollow bullet, creating a plurality of circumferentially spaced apart fins that flare radially outwardly upon impact with a soft target.

Claims (26)

1. A round of ammunition, comprising:

a cartridge having a predetermined longitudinal extent;

a projectile having a predetermined longitudinal extent that exceeds the predetermined longitudinal extent of said cartridge, said projectile having a trailing end slideably disposed within said cartridge;

said cartridge and said projectile sharing a common longitudinal axis of symmetry;

said projectile having a hollow interior;

said projectile having a predetermined center of gravity coincident with said longitudinal axis of symmetry;

said projectile having a center of pressure coincident with said longitudinal axis of symmetry, said center or pressure created when said projectile is in flight;

a propellant filling said cartridge and said hollow interior, said propellant filling said cartridge being in open communication with said propellant filling said hollow interior;

said projectile having a flat leading end;

an annular ring secured to said flat leading end in concentric relation to said longitudinal axis of symmetry;

said flat leading end and said annular ring moving said center of pressure forwardly so that said center of pressure is forward of said center of gravity when said projectile is in flight.

2. The round of claim 1 , further comprising:

a plurality of circumferentially spaced apart slits formed in said trailing end of said projectile;

a plurality of circumferentially spaced apart fins formed in said trailing end of said projectile by said plurality of circumferentially spaced slits.

3. The round of claim 2 , further comprising:

said slits of said plurality of slits having a straight configuration so that said fins have a rectangular configuration.

4. The round of claim 3 , further comprising:

said slits having a longitudinal extent of about one-third of said predetermined longitudinal extent of said projectile.

5. The round of claim 1 , further comprising:

a plurality of circumferentially spaced apart weakening lines formed in said trailing end of said projectile;

a plurality of contiguous fins, each fin of said plurality of contiguous fins being positioned between a pair of said weakening lines;

each fin of said plurality of contiguous fins having a deployed configuration and an undeployed configuration;

each fin of said plurality of contiguous fins being substantially parallel to said longitudinal axis of symmetry when in its undeployed configuration; and

each fin of said plurality of contiguous fins being oblique to said longitudinal axis of symmetry when said projectile has entered a soft target.

6. The round of claim 5 , further comprising:

said weakening lines having a longitudinal extent of about one-third of said predetermined longitudinal extent of said projectile.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 3, 2018
From: LIBERTY AMMUNITION, INC.
To: LIBERTY OPCO, LLC
Reel/Frame 047659/0941 →
SECURITY AGREEMENT Recorded Sep 10, 2012
From: LIBERTY AMMUNITION, INC.
To: APPALACHIAN CAPITAL LLC; KAMHAWI, WALID; Q INFO TECH, LTD; PALKAR, ANUP VIJAY; SFA CAPITAL, LLC; CORWAVE, INC.; JC LIBERTY, LLC; SEALINE PRODUCTIONS LLC
Reel/Frame 028930/0717 →
CHANGE OF NAME Recorded Jul 5, 2011
From: LIBERTY AMMUNITION, LLC
To: LIBERTY AMMUNITION, INC.
Reel/Frame 026544/0890 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 14, 2010
From: MARX, PJ
To: LIBERTY AMMUNITION, LLC
Reel/Frame 024527/0308 →
Continuity (2)
Provisional Application 61326823 · Apr 22, 2010
Related Publication 20110259231A1 · Oct 27, 2011