×

Jacketed projectile for ammunition

  • US 5,038,684 A
  • Filed: 06/18/1990
  • Issued: 08/13/1991
  • Est. Priority Date: 06/18/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. A projectile for a round of ammunition, the projectile capable of being driven through a barrel of a gun wherein the barrel has an inner diametrical surface whose radius is smaller than the radius of a largest diameter zone of the projectile, wherein the inner diametrical surface of the barrel defines a generally spiral shaped groove, the groove having a bed surface radially outward of the inner diametrical surface, the projectile comprising:

  • a core radially symmetric about an axis;

    a plastic jacket surrounding the core, the jacket having a rearward end and a forward end;

    a portion of the jacket forming the largest diameter zone of the projectile, the largest diameter zone being deformed at least mainly elastically to form a groove engagement member when the largest diameter zone engages the inner diametrical surface of the barrel, the groove engagement member protruding raidally outwardly relative to the axis part of the way into the groovemeans for sealing the projectile with the inner diametrical surface and the groove, the sealing means including an elastically deformable annular peripheral zone at the rear of the projectile, the peripheral zone having a greater radius than the inner diametrical surface whereby the jacket temporarily forms an annular bulge extending rearwardly from the projectile while the projectile is within the barrel, and whereby the annular bulge sealingly engages the inner diametrical surface and the groove;

    means for influencing the direction of elastic deformation of the jacket at the largest diameter zone of the projectile during raidal compression of the largest diameter zone by the inner diametrical surface, the influencing means increasing the tendency of the deformation to be directed toward the annular peripheral zone at the rearward end of the jacket, the influencing means comprising a head on the core at the foward end and disk-like portion on the core at the rearward end, the diameter of the disk-like portion being smaller than a greatest diameter portion of the head.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×