Projectile

• US 7,921,780 B2
• Filed: 11/10/2008
• Issued: 04/12/2011
• Est. Priority Date: 04/02/2004
• Status: Active Grant

• Current Assignee: Techventure Investments Pty Ltd.
• Original Assignee: Techventure Investments Pty Ltd.
• Inventors: Harrison, Leslie Mervyn
• Primary Examiner(s): Bergin; James S
• Application Number:
  US12/291,438
• Publication Number:
  US 20090178585A1
• Time in Patent Office: 883 Days
• Field of Search: 102/374, 102/375, 102/376, 102/431, 102/439, 102/490, 102/501, 102/517, 102/524, 102/526, 102/529, 102/380, 102/527, 102/503
• US Class Current: 102/439
• CPC Class Codes: F42B 30/02 Bullets
• CPC Class Codes: F42B 5/10 with self-propelled bullet

Abstract

A projectile (10) comprises a cylindrical body (12) with a first (leading) end (14) and a second trailing axially opposed end (16). An internal cavity (18) is formed between the ends (14 and 16) and holds a volume of propellant material (22). The first end (14) is closed by a nose (20) that is fixed to the body (12). The end (14) is sealed with a base seal (26) that seats a primer (24) for igniting the propellant (22). The primer (24) is located inboard of the second end (16) and the base seal (26) to reduce the likelihood of accidental activation. Seals (30) are formed about the body (12) for maintaining gas pressure of deflagrating propellant. The seals (30) may be formed integrally with the body (12) or separately from the body (12) and seated in respective grooves (40) formed circumferentially about the body (12). Also disclosed is a breech sleeve (810) shaped to complement the breech of the weapon and a throughway (816) defined by an internal surface, the projectile being able to pass through the throughway (816).

Claims

1. A projectile for firing out of a barrel of a small arms weapon, the barrel having an inner diameter, the projectile comprising:

a substantially cylindrical projectile body with first and second axially opposite ends and a cavity extending between the first end and the second end for holding a quantity of propellant, the cylindrical body having a first outer diameter and the first end being closed;

at least two seals extending about an outer circumferential surface of the body, each seal protruding radially from the body to form a substantial seal against an inner circumferential surface of the barrel when the projectile is fired, each seal having a second outer diameter greater than the first outer diameter and equal to or greater than the inner diameter of the barrel; and

,

a case comprising a tube sealed at one end by a base, the case fitted over a portion of the cylindrical body with the base adjacent the second end of the cylindrical body and closing the cavity wherein the first end of the cylindrical body protrudes from the tube.

2. The projectile according to claim 1 wherein the at least two seals comprise one seal formed adjacent the second end of the cylindrical body.

3. The projectile according to claim 2 wherein the at least two seals comprise a second seal formed near the first end of the cylindrical body, and wherein the second seal is at least partially covered by the tube.

4. The projectile according to claim 3 wherein the second seal extends axially along the cylindrical body from a location inside of the tube to a location outside of the tube.

5. The projectile according to claim 3 wherein the seals are formed integrally with the body.

6. The projectile according to claim 1 wherein the cavity extends for a length substantially the same as a length of the tube.

7. The projectile according to claim 1 comprising a primer supported centrally in the base.

8. A projectile for firing out of a barrel of a small arms weapon, the barrel having an inner diameter, the projectile comprising:

a substantially cylindrical projectile body with first and second axially opposite ends and a cavity extending between the first end and the second end, the cylindrical body having a first outer diameter and the first end being closed;

at least two seals extending about an outer circumferential surface of the body, each seal protruding radially from the body to form a substantial seal against an inner circumferential surface of the barrel when the projectile is fired, each seal having a second outer diameter greater than the first outer diameter and equal to or greater than the inner diameter of the barrel;

a quantity of propellant; and

,

a case comprising a tube sealed at one end by a base, the case fitted over a portion of the cylindrical body with the base adjacent the second end of the cylindrical body and closing the cavity, wherein said quantity of propellant is retained within the cavity by the base, and wherein the first end of the cylindrical body protrudes from the tube.

9. The projectile according to claim 8 wherein the at least two seals comprise one seal formed adjacent the second end of the cylindrical body.

10. The projectile according to claim 9 wherein the at least two seals comprise a second seal formed near the first end of the cylindrical body, and wherein the second seal is at least partially covered by the tube.

11. The projectile according to claim 10 wherein the second seal extends axially along the cylindrical body from a location inside of the tube to a location outside of the tube.

12. The projectile according to claim 10 wherein the seals are formed integrally with the body.

13. The projectile according to claim 8 wherein the cavity extends for a length substantially the same as a length of the tube.

14. The projectile according to claim 8 comprising a primer supported centrally in the base.