Patent EA-001478-B1 (EA)
Title: Low-caliber shot gun bullet, especially for short guns with a partially or fully rifled barrel
Inventor: KRUPER WOLFGANG
IPC: F42B10/02
Filed: 1998-10-29
Abstract: 1. A low-caliber shot gun bullet, especially for short guns with a partially or fully distended barrel, whereby said bullet is accommodated in a drive cage (11) and consists of a bullet jacket (2) with an axial through hole (7.1, 7.2, 7.3, 7.4) in which a bullet core (3) is received axially, said core comprises a nose (3.1) with an aerodynamic end and a tail (8) with an abutment (9), wherein prior to firing said bullet nose (3.1) is substantially inside the bullet jacket (2) and the tail protrudes from the jacket at the rear end, while when fired said bullet core (3) is displaced inside the jacket (2) so that the point (4) of the bullet nose (3.1) protrudes over the jacket (2), said displacement is limited by said abutment (9) in the direction towards the jacket rear end and a bullet shape, formed due to a favourable trajectory from the point of view of ballistics, is arrested during at least flight phase. 2. A low-caliber shot gun bullet as claimed in claim 1, characterized in that the bullet tail (8) at the end of the core (3) displacement is pressed round the perimeter in the bullet jacket (2) and thus finally formed the bullet shape is stabilized at least up to hitting a target.  3. A low-caliber shot gun bullet as claimed in claim 1 or 2, characterized in that said bullet core (3) consists at least partially of a harder material than the bullet jacket (2). 4. A low-caliber shot gun bullet as claimed in claim 3, characterized in that said bullet core (3) consists least partially of steel, and the bullet jacket of copper. 5. A low-caliber shot gun bullet as claimed in claim 3 or 4, characterized in that said bullet tail (8) consists of steel, and the bullet nose (3.1) of light metal or plastic. 6. A low-caliber shot gun bullet as claimed in claims 2 to 5, characterized in that said bullet nose (3.1) has a point (4) shaped as an elongated cone and in a working position is mostly sunk in the bullet jacket (2). 7. A low-caliber shot gun bullet as claimed in claim 6, characterized in that the distance (a) between facing each other front surfaces (9.1, 9.2) of the abutment (9) and the bullet jacket (2) is equal to the depth (b) of sinking the point (4) of the bullet nose (3.1) into the bullet jacket (2). 8. A low-caliber shot gun bullet as claimed in claims 2 to 7, characterized in that said bullet nose (3.1) at the end of the bullet core (3) displacement closes the nose end face surface by its outer perimeter. 9. A low-caliber shot gun bullet as claimed in claims 2 to 7, characterized in that at least at the end of the core (3) displacement there is an open annular gap (17) in the bullet nose between the jacket (2) inner wall and the outer nose wall (3.1). 10. A low-caliber shot gun bullet as claimed in any one of the preceding claims, characterized in that for variable deformation of the bullet jacket (2) its material and/or the wall thickness are changed and/or given bending places are provided. 11. A low-caliber shot gun bullet as claimed in any one of the preceding claims, characterized in that for variable deformation of the bullet jacket (2) relieved recesses of the bullet core (3) are provided. 12. A low-caliber shot gun bullet as claimed in claims 2 to 11, characterized in that for variable deformation of the bullet nose (3.1) the material is changed and/or its manufacture design (solid or hollow).