Multi-component projectile rotational interlock

• US 8,267,015 B2
• Filed: 05/21/2010
• Issued: 09/18/2012
• Est. Priority Date: 10/21/2005
• Status: Active Grant

• Current Assignee: Liberty Opco, LLC
• Original Assignee: Liberty Ammunition, Inc.
• Inventors: Marx, PJ
• Primary Examiner(s): Bergin, James
• Application Number:
  US12/784,647
• Publication Number:
  US 20110155014A1
• Time in Patent Office: 851 Days
• Field of Search: 102/501, 102/506, 102/517, 102/524
• US Class Current: 102/517
• CPC Class Codes: F42B 10/26 using spin F42B10/04, F42B10/12, F42B10/14, F42B10/24, F42B14/02 take precedence
• CPC Class Codes: F42B 10/38 Range-increasing arrangements F42B10/34, F42B14/06 and F42B15/105 take precedence
• CPC Class Codes: F42B 12/34 expanding before or on impact, i.e. of dumdum or mushroom type
• CPC Class Codes: F42B 14/02 Driving bands; Rotating bands F42B14/04 takes precedence

Abstract

A projectile has a leading part, a trailing part and a cylindrical interface that interconnects the leading and trailing parts. A non-round aperture having a predetermined longitudinal extent is formed in the trailing end of the leading part and a non-round peg having a predetermined longitudinal extent substantially equal to the predetermined longitudinal extent of the non-round aperture is formed in the leading end of the trailing part. The non-round peg is slideably inserted within the non-round aperture when the leading end of the cylindrical interface abuts the trailing end of the leading part and the trailing end of the cylindrical interface abuts the leading end of the trailing part so that the leading and trailing parts of the projectile rotate conjointly with one another when the projectile is rotating about its axis of rotation.

Claims

1. A projectile, comprising:

a leading part including a tip having a generally ogive shape;

a trailing part including a main base;

a cylindrical interface including a leading end that abuttingly engages a trailing end of said tip and a trailing end that abuttingly engages a leading end of said main base;

a non-round aperture having a predetermined longitudinal extent formed in said trailing end of said tip;

a non-round peg having a predetermined longitudinal extent substantially equal to the predetermined longitudinal extent of said non-round aperture formed in said leading end of said main base;

said non-round aperture and said non-round peg being centered on a longitudinal axis of symmetry of said projectile, said longitudinal axis of symmetry being a longitudinal axis of rotation of said projectile; and

said non-round peg being slideably inserted within said non-round aperture when the leading end of said cylindrical interface abuts said trailing end of said tip and the trailing end of said cylindrical interface abuts said leading end of said main base so that said leading and trailing parts of said projectile rotate conjointly with one another when said projectile is rotating about said axis of rotation.

2. The projectile of claim 1, further comprising:

a tip base of cylindrical construction having a reduced diameter relative to said trailing end of said tip so that a first annular shoulder is formed where said trailing end of said tip meets a leading end of said tip base; and

a leading rod formed integrally with said tip base and having a reduced diameter relative to said tip base so that a second annular shoulder is formed where a trailing end of said tip base meets a leading end of said leading rod.

3. The projectile of claim 2, further comprising:

a truncate base of cylindrical construction formed integrally with said leading end of said main base and having a reduced diameter relative to said leading end of said main base so that a third annular shoulder is formed where said leading end of said main base meets a trailing end of said truncate base;

a trailing rod formed integrally with a leading end of said truncate base and having a reduced diameter relative to said truncate base so that a fourth annular shoulder is formed where said leading end of said truncate base meets a trailing end of said trailing rod.

4. The projectile of claim 3, further comprising:

said leading end of said cylindrical interface disposed in abutting relation to said first annular shoulder and said trailing end of said cylindrical interface disposed in abutting relation to said third annular shoulder.

5. The projectile of claim 4, further comprising:

said non-round aperture formed in said trailing end of said leading rod.

6. The projectile of claim 5, further comprising:

said non-round peg formed in a leading end of said trailing rod.

7. The projectile of claim 6, further comprising:

said non-round peg being slideably disposed in said non-round aperture when said leading end of said cylindrical interface is disposed in abutting relation to said first annular shoulder and said trailing end of said cylindrical interface is disposed in abutting relation to said third annular shoulder so that said leading part of said projectile rotates conjointly with said trailing part thereof.