Multiple-component projectile with non-discarding sabot sleeve

• US 6,305,293 B1
• Filed: 08/09/1999
• Issued: 10/23/2001
• Est. Priority Date: 04/14/1998
• Status: Expired due to Fees

• Current Assignee: Laser II LLC
• Original Assignee: Laser II LLC
• Inventors: Furr, Douglas Kay, Fry, Grant
• Primary Examiner(s): TUDOR, HAROLD JAY
• Application Number:
  US09/370,560
• Time in Patent Office: 806 Days
• Field of Search: 102/514-527
• US Class Current: 102/517
• CPC Class Codes: F42B 12/78 of jackets for smallarm bullets ; Jacketed bullets or projectiles

Abstract

The present invention comprises a multiple-component projectile which remains intact after leaving the barrel of a gun. The projectile comprises a core which includes a leading tip and a cylindrical shaft section which extends aft of the tip. A sabot sleeve surrounds the cylindrical shaft section and has a sufficient diameter to engage the rifling on the interior of a gun barrel. A rear cap connects to the aft end of the shaft section and secures the sabot sleeve to the shaft and tip. Preferred embodiments of the present invention comprise an annular lip and slot on the leading tip configured to receive the leading edge of the sabot sleeve and prevent it from separating from the core while traveling through the gun barrel and thereafter. The rear cap may also comprise an annular lip and slot configured to receive the trailing edge of the sabot sleeve and further lock the sleeve to the core thereby preventing longitudinal movement of the sleeve relative to the core. Longitudinal protruding fins on the interior of the sabot sleeve and complementary flutes on the exterior surface of the cylindrical shaft section also prevent independent rotation of the sleeve and core such that both will rotate in unison while traveling through a gun barrel and thereafter through the trajectory of the projectile.

Claims

1. A projectile for firing from the barrel of a gun, comprising:

a core having a leading tip located on a leading end of said core and having a cylindrical shaft section with an outer and inner diameter, wherein said outer diameter of said cylindrical shaft section has flutes and fins protruding annularly around said outer diameter of said cylindrical shaft section, wherein said cylindrical shaft section connects to said leading tip to form a leading annular slot between said leading tip and said cylindrical shaft section;

a rear cap having a stem, wherein said stem is frictionally fit within a cavity defined by said inner diameter of said cylindrical shaft section, wherein said cavity partially extends from said trailing end of said core toward said leading end of said core, and wherein a trailing annular slot is formed between said rear cap and said trailing end of said core when said stem of said rear cap is frictionally fit within said cavity;

a sabot sleeve that remains with said core and said rear cap after firing, said sabot sleeve encompassing said cylindrical shaft section of said core, wherein said sabot sleeve has an inner diameter and an outer diameter and has a leading edge and a trailing edge, wherein said sabot sleeve has flutes and fins protruding annularly and inwardly from said inner diameter of said sabot sleeve and extending substantially the entire length of said sabot sleeve and wherein said sabot sleeve rotationally interlocks said cylindrical shaft section by the complementary mating of flutes and fins located on both said inner diameter of said sabot sleeve and on said outer diameter of said cylindrical shaft section, and further, wherein said sabot sleeve becomes longitudinally interlocked onto said cylindrical shaft section by said leading edge of said sabot sleeve being received within said leading annular slot and by said trailing edge of said sabot sleeve being received within said trailing annular slot.

2. The projectile of claim 1, wherein said outer diameter of said sabot sleeve has a smooth surface.

3. The projectile of claim 1, wherein said core is composed of a material selected from the group consisting of lead, stainless steel, uranium and titanium.

4. The projectile of claim 1, wherein said sabot sleeve is constructed from polycarbonate combined with a synthetic resin.

5. The projectile of claim 4, wherein said synthetic resin is polyester or polypropylene.

6. The projectile of claim 1, wherein said leading tip has a conical shape and said conical shape extends onto a surface of said sabot sleeve.

7. The projectile of claim 1, wherein said rear cap has a truncated conical shape and said conical shape extends onto a surface of said sabot sleeve.

8. The projectile of claim 1, for use in a barrel of a rifle, wherein said barrel has an inner diameter, and wherein said inner diameter has an even or odd number of grooves protruding annularly and inwardly from said inner diameter of said barrel which engage said sabot sleeve.

9. The projectile of claim 8, wherein an even number of grooves are present on said inner diameter of said barrel when an odd number of said flutes and fins are present on said inner diameter of sabot sleeve.

10. The projectile of claim 8, wherein an odd number of grooves are present on said inner diameter of said barrel when an even number of said flutes and fins are present on said inner diameter of sabot sleeve.

11. The projectile of claim 8, wherein said outer diameter of said sabot sleeve is larger than said inner diameter of said barrel, such that said outer diameter of sabot sleeve expands into said grooves of said inner diameter of said barrel when projectile is fired to cause said sabot sleeve and said core and said rear cap to rotate concurrently throughout said barrel upon firing.