Patent ID: 7690311

Claim:
A projectile consisting of a solid capsule filled with a flowable payload, said solid capsule comprising: a) a point that is the part of the solid capsule which is closer to the target at the moment of impact b) a single weakened area that is less resistant than the rest of the solid capsule, is located adjacent to the solid capsule's point, is the only part of the solid capsule which completely collapses upon impact, ruptures from inside to outside because of the payload's pressure at the moment of impact, the weakened area being one of material being thinner than the rest of the solid capsule, is made of less resistant material than the rest of the solid capsule, or has multiple grooves on it for stress concentration c) a base that keeps its shape upon impact and is the part of the solid capsule which is more distant to the target at the moment of impact d) an internal hydrodynamic structure, consisting of a cone that is coaxial to the projectile, is pointed in the opposite direction of the capsule's point, is immersed in direct contact with the payload, is made of a lighter or same density material in relation to the payload's density, has direct contact with all the flow of the payload at the moment of impact, and radially diverges from the center to the periphery this entire flow directly to a single weakened area e) a resistant area that is more resistant than the weakened area, is located adjacent to the solid capsule's base and keeps its shape upon impact.