Ammunition and explosives – Projectiles – Having jacket
Reexamination Certificate
1999-05-17
2001-02-06
Tudor, Harold J. (Department: 3641)
Ammunition and explosives
Projectiles
Having jacket
C102S510000, C102S518000
Reexamination Certificate
active
06182574
ABSTRACT:
BACKGROUND OF THE INVENTION
The instant invention is directed to a projectile for rifles, pistols, and shotgun slugs. The projectile is designed to provide maximum penetration, shock, and accuracy while being used with standard powder loads and barrel rifling.
Multi-component projectiles have been known for many years. U.S. Pat. Nos. 1,094,395; 1,468,113; 5,097,768; and 5,349,907 all disclose multi-component projectiles. None, however disclose a projectile with specific components shaped weighted and located as herein described.
It is a primary object of the instant invention to provide a projectile constructed to include an outer jacket which expands upon striking a target and a penetrant of a heavy dense material which does not expand on contact but continues into the target.
Another object of the invention is to provide increased flight stability by locating the penetrant in the tip of the projectile.
Another object of the invention is to provide specific metal alloys for forming the various components of the projectile with selected specific gravities and harnesses.
Another object of the invention is to provide reduced friction between the barrel rifling and the outer surface of the projectile.
Another object of the invention is to provide a projectile with a duel diameter jacket.
Another object of the invention is to provide a projectile with reduced barrel drag.
Another object of the invention is to provide a projectile in which a majority of the weight is in its tip rather than its base.
Another object of the invention is to construct a projectile of metal alloys of sufficient weight to allow it to have a trajectory which is substantially flat.
Another object of the invention is to construct a projectile of metal alloy of sufficient weight as to allow the projectile to be compact.
SUMMARY OF THE INVENTION
The instant invention is directed to a projectile for use with firearms. The projectile has a generally conically shaped jacket having a forward tip, a rear base, a body portion, and a central axis. The jacket is formed of a first metal. Located inside the jacket is a generally cylindrically shaped penetrant which is formed of a second metal. The penetrant is formed with a forward tip, a rear base, a body portion, and a central axis. The tip of the penetrant is positioned substantially adjacent the tip of the jacket with its longitudinal axis aligned with that of the jacket. Finally, a core, which is formed of a third metal fills the jacket and is located about the tip, body, and base of the penetrant.
The third metal has a hardness less than that of the first and second metals while the second metal has a hardness greater than that of the first metal. This arrangement causes the projectile to disintegrate upon striking a target with the penetrant breaking through the jacket and the core causing them to expand and decelerate while the penetrant retains its shape and continues to pass through the target.
The rear portion of the jacket body includes a shoulder defining an enlarged radial portion which extends along said body to the base. This enlarged radial portion comprises that area of the casing engaged by barrel rifling when the projectile passes through the barrel. The shoulder is located to generally be aligned with the base of the penetrant.
The base of the jacket may be flat as it may be in the shape of a rebated boat tail. The tip of the jacket may be substantially flat or pointed while the projectile tip is preferably pointed. The core adjacent said jacket tip may be cupped in the direction of the projectile tip or it may fill the jacket tip.
The projectile may include an inner jacket between the jacket base and the projectile base. The inner jacket is formed of a metal with a hardness greater than the hardness of the core. The inner jacket is filled with the third metal. The thickness of the jacket wall may increase from the jacket tip to the jacket base. Also, the jacket may include longitudinally extending circumferentially arranged slits which extend from its tip toward its base.
The jacket forming material includes pure copper or copper mixed with 5% to 15% zinc. The core forming material includes an alloy of lead or a tungsten and bismuth alloy while the penetrant metal includes an alloy formed of tungsten and one of bismuth, copper, and tin. A molybdenum disulfide or other suitable plastic coating having a low coefficient of friction may be applied to the outside of the jacket.
A projectile for use with firearms having first and second cores formed of a plurality of metals of differing weights and hardnesses. The second core includes a body having a shaped base and a crater shaped hollowed front portion. The body part is formed of an alloy formed of tungsten combined with bismuth, tin, and copper.
The forward or first core of the projectile is formed of an alloy formed of tungsten and bismuth or tungsten and tin. This alloy is preferably heavier than lead but is softer than the alloy forming the second core. The first core has a specific gravity which is at least equal to that of the second core.
The first core is substantially oval shaped, filling the cavity of the second core with its rear portion while its forward portion forms conically shaped tip.
A shaped copper or copper zinc jacket encases the first and second cores.
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Flint & Kim, P.A.
Tudor Harold J.
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