Projective with improved flowering

• US 5,185,495 A
• Filed: 04/13/1992
• Issued: 02/09/1993
• Est. Priority Date: 04/13/1992
• Status: Expired due to Fees

• Current Assignee: United States Of America As Represented By The Secretary Of The Army (Government of the United States of America)
• Original Assignee: United States Of America As Represented By The Secretary Of The Army (Government of the United States of America)
• Inventors: Petrovich, Paul A., Petrovich, Robert M.
• Primary Examiner(s): TUDOR, HAROLD JAY
• Application Number:
  US07/867,571
• Time in Patent Office: 302 Days
• Field of Search: 102/506-510, 102/514-519
• US Class Current: 102/510
• CPC Class Codes: F42B 12/34 expanding before or on impact, i.e. of dumdum or mushroom type

Abstract

The invention is an improved partially jacketed projectile intended for small arms use. The projectile includes a central stem integral with a rear wall of the projectile, the rear wall in turn being integral with the partial jacket. A core surrounding the stem and encased by the jacket is softer than the material forming the stem, rear wall and jacket. The jacket retards core petalling during initial projectile impact whereas the rear wall configuration enhances petalling when the projectile achieves subsequent target penetration.

Claims

1. A petalling projectile, comprising:

a front end;

a rear end;

a central longitudinal axis;

a core centered on the longitudinal axis;

means for allowing petalling of the core away from the axis during the core'"'"'s penetration into a target, the allowing means including means for retarding petalling at initial impact of the projectile with the target;

the allowing means further including acceleration means for enhancing subsequent petalling of the core after initial target penetration by the projectile, the acceleration means including a stem extending along the axis from the front end to the rear end, the stem fixed to the core before the initial impace and axially loosening from the core after the initial target penetration, the acceleration means further including a radially inwardly deforming wall at the rear end, said stem and said rear wall formed as a single one-piece element of the same material throughout, said stem having a smooth outer surface over substantially its entire length, said stem and said rear wall being of a harder material than said core.

2. The projectile of claim 1 wherein a lateral wall of the stem forms an angle of 1 to 5 degrees with the axis.

3. The projectile of claim 1 further including a forwardly tapered ring neck integral with said rear wall.

4. The projectile of claim 1 wherein the stem has a generally straight, cylindrical configuration.

5. The projectile of claim 1 wherein the retarding means is a partial jacket surrounding the core, segments of the partial jacket folding radially outwardly after initial target penetration.

6. The projectile of claim 1 further comprising:

a curved surface at the forward end;

means for piercing the target ahead of the core, the piercing means including a terminus of the stem interrupting the curved surface so as to form a forward protrusion at the curved surface.

7. The projectile of claim 1 wherein said rear wall has a generally conically shaped surface;

a radially outer portion of the wall contacting a rear surface of the core, the radially outer portion drawn radially inward in concert with forward motion of the stem relative to the core;

the outer portion of the wall imparting a radially inward force to the body sections during penetration.

8. The projectile of claim 7 wherein:

the wall defines a generally conical void at the rear of the projectile;

the wall tapers in the radially outward, rearward direction.

9. The projectile of claim 8 wherein the core at the forward end defines a hollow point configuration.

10. The projectile of claim 7 wherein:

the wall defines a generally conical void at the rear of the projectile;

the wall diverge in the radially outward, rearward direction.