Abstract:
A firearm projectile including a penetrating central body, a tip at the forward end of the body. An outer encasement component around a portion of the central body. A displacement shroud around the outer encasement arranged to provide force specific energy transfer and projectile stabilization during integral flight from a firearm.

Description:
BACKGROUND OF THE INVENTION 
     1. Technical Field 
       [0001]    This invention relates to ammunition, specifically ammunition used in small arms having armor piercing capabilities. 
       2. Description of Prior Art 
       [0002]    Prior art armor piercing projectiles have been developed for use on a variety of weapons specifically by the military in a number of user specific requirements. Such military projectiles use a depleted uranium core due to its dense properties. Examples of projectile ammunition can also be seen in U.S. Pat. Nos. 5,009,166, 6,105,506, 7,520,224, and U.S. Pat. 8,161,886. 
         [0003]    In U.S. Pat. 5,009,166 is directed to a low cost penetrator projectile having a hard metal core with a hollow conical shape formed from low carbon steel in a series of progressive dies to achieve a Rockwell hardness of C50 and C55. 
         [0004]    U.S. Pat. No. 6,105,506 claims a bullet body and an nonrotable sabot slug for shotguns with a jacketed bullet with a forward end hollow point and a metal sabot that comes in contact with the rifling in the gun barrel. 
         [0005]    U.S. Pat. No. 7,520,224 discloses an advanced armor piercing projectile having a precision machine outer and inner component. The inner component is of a higher density than the outer and higher than that of armor plate such as tungsten. 
         [0006]    U.S. Pat. No. 8,161,886 is directed to a short magnum shot shell cartridge and firing assembly wherein a sabot retaining shot shell cartridge chamber has a sub-caliber projectile. 
       SUMMARY OF THE INVENTION 
       [0007]    An armor piercing projectile cartridge having a composite penetration core of hardened steel within a steel jacket formed socket. A stabilization sabot of synthetic resin material with elastic base insert surrounds the jacketed composite projectile defining a twelve-gauge armor piercing projectile within a cartridge hull having a propellant and primer. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0008]      FIG. 1  is a partial sectional view of the composite armor piercing projectile cartridge of the invention. 
           [0009]      FIG. 2  is an exploded sectional view of the composite armor piercing projectile during deployment. 
           [0010]      FIG. 3  is a top plan view of the composite armor piercing projectile. 
           [0011]      FIG. 4  is a bottom plan view thereof. 
           [0012]      FIG. 5  is a top plan view of the composite armor piercing cartridge. 
           [0013]      FIG. 6  is an exploded assembly view of the composite armor piercing projectile. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0014]    Referring now to  FIG. 1  of the drawings, a composite armor piercing projectile cartridge  10  of the invention can be seen which is adapted to be fired in an appropriate gauge firearm F. The composite armor piercing cartridge  10  comprises a cylindrical hollow cartridge hull  11  with a brass head  12  and a center primer  13  with a propellant charge  14  as will be well understood by those skilled in the art. The cylindrical hull  11  has an open end front portion  11 A which is crimped inwardly at  11 A around its free edge to retain the composite projectile and sabot as will be discussed hereinafter and a base portion  11 B closed by the brass head  12 . The cartridge hull  11  is typically made of synthetic resin plastic or treated cardboard as is commonly used within the art. 
         [0015]    A composite projectile assembly  10  of the invention is capable of penetrating AR500 grade designated armor plate AP graphically illustrated for reference purposes in broken lines in  FIG. 2  of the drawings. The projectile assembly comprising a bi-metal projectile  16 , a sabot  26 , a resilient seat insert  18  and a contoured synthetic resin separation wad  19 . 
         [0016]    The bi-metal projectile  16  has a monolithic cylindrical body member  20  with a conical engagement end portion  20 A and oppositely disposed base end surface  20 B. The projectile  16  is formed of hardened steel which in this example 4142 steel hardened C58/62 and is illustrated as a twelve-gauge shell dimension. 
         [0017]    The projectile  16  conical engagement end portion  20 A is of a length L 1  greater than that of its overall length indicated at L 2  in  FIG. 2  of the drawings. 
         [0018]    It will be evident that dimensional variances are not limited to the preferred embodiment designation, but can vary depending on application user venue. 
         [0019]    A steel projectile jacket  21  encases the cylindrical portion of the overall body member  20  forming a projectile receiving pocket  22  therein having a uniform continuous upstanding integrated sidewall  23  and a base  24  of increased dimensional thickness in comparison thereto. 
         [0020]    The sidewall  23  has a free annular upper edge  25  tapered to be aerodynamically compliant with the conical end portion  20 A of the projectile  16 , when assembled. The composite assembly bi-metal projectile  16  and jacket  21  is in turn fitted within the stabilization sabot  26  made from plastic, in this example, defining a shroud thereabout. The sabot  26  has an annular sidewall  26 A with multiple spaced cuts C thereabout, an offset annular base  26 B of increased dimension mass. The sabot  26  will thus support and stabilize the composite bi-metal projectile  16  during its initial flight and then separate and split open as seen in  FIG. 6  of the drawings induced by the sabot velocity for deployment. 
         [0021]    Referring back now to  FIG. 1  of the drawings, the resilient seat insert  18  within the sabot  26  engaged by the composite bi-metal projectile  16  is formed from a synthetic/rubber material and is of an annular disk shape with oppositely disposed planar surfaces  18 A and  18 B. The resilient seat insert  18 , as noted, is fitted in the sabot  26  prior to the composite projectile  16  insertion to form a shock cushion thereto as the cartridges fire prior to sabot separation deployment, as noted. 
         [0022]    The contoured cartridge wad  19 , as best seen in  FIGS. 1 and 6  of the drawings, abuts the bottom of the sabot  17  during cartridge assembly having an oppositely disposed spaced concave surface  19 A effacing the cartridge propellant charge  14  which in this application is smokeless gun powder infilling the remaining hull interior area in direct contact with the hereinbefore described cartridge primer  13 . 
         [0023]    The armor piercing projectile cartridge  10  will therefore provide for optimum ballistic performance co-efficiency of the composite bi-metal projectile  16  for maximum piercing impact with the targeted armor plate AP, as described. 
         [0024]    It will thus be seen that a new and novel composite armor piercing cartridge  10  of the invention has been illustrated and described and it will be apparent to those skilled in the art that various changes and modifications may be made thereto without departing from the spirit of the invention. Therefore, I claim: