Less lethal weapon projectile

Abstract

A less lethal weapon projectile having an overall cylindrical shape and including a front end ( 4 ) shaped as an at least approximately spherical cap and a rear end ( 2 ) includes: a core ( 6 ) made from aluminium foam, having an overall cylindrical shape and including a front end ( 16 ) and a rear end ( 13 ) with a rear face ( 14 ), the front end ( 16 ) shaped as an at least substantially spherical cap; a base ( 5 ) assembled with the rear end ( 13 ) of the core ( 6 ) and including a front wall ( 9 ), arranged transversely and covering the rear face ( 14 ) of the core ( 6 ); and an outer case ( 7 ) covering at least the front end ( 16 ) of the core ( 6 ). The center of gravity and the center of thrust correspond perfectly, so that the projectile has good external ballistics.

1 . A projectile for less lethal weapon, having an overall cylindrical shape of longitudinal axis, said projectile comprising:
 a projectile front end having a shape of a spherical or approximately spherical cap,   a projectile rear end,   a core made from aluminum foam, said core having an overall cylindrical shape centered on said axis, comprising a core front end in the shape of a spherical or substantially spherical cap, and a core rear end with a rear face,   a base assembled with said rear end of the core, said base comprising a wall, arranged transversally to said axis, which covers said rear face of said core, and   an outer case covering at least the front end of said core.   
     
     
         2 . The projectile according to  claim 1 , wherein said core is made from aluminum foam having a density between 30 and 300 kg/m 3 . 
     
     
         3 . The projectile according to  claim 1 , wherein said base is made from a thermoplastic material. 
     
     
         4 . The projectile according to  claim 1 , wherein said outer case is made from thermoplastic foam. 
     
     
         5 . The projectile according to  claim 1 , wherein the transversal wall of the base is extended towards the rear by a tubular wall, centered on said axis, delimiting an opening rear cavity. 
     
     
         6 . The projectile according to  claim 1 , wherein the transversal wall of the base is extended towards the front by a tubular extension, centered on said axis, in order to form a housing for receiving the rear end of the core made from aluminum foam. 
     
     
         7 . The projectile according to  claim 5 , wherein said rear tubular wall, or said front tubular extension, comprises an annular exterior guiding ring. 
     
     
         8 . The projectile according to  claim 1 , wherein the transversal wall of the base is extended towards the front by an axial tenon. 
     
     
         9 . The projectile according to  claim 1 , wherein said outer case is extended to the rear base to cover the entire exposed face of the core. 
     
     
         10 . The projectile according to  claim 9 , wherein a rear end of the case comprises a bead, directed inwards, which penetrates into an annular receiving groove arranged in the core. 
     
     
         11 . The projectile according to  claim 10 , wherein the front end of the base covers the rear end of the case in order to lock into position said bead in said groove. 
     
     
         12 . The projectile according to  claim 11 , wherein the front end of the base and the rear end of the case cooperate through complementary shoulders. 
     
     
         13 . The projectile according to  claim 1 , wherein the core comprises an axial recess opening into the rear face of the core facing the front transversal wall of the base. 
     
     
         14 . The projectile according to  claim 1 , which comprises an annular contraction between the front and rear ends of the projectile, corresponding to a decrease in diameter, said contraction extending towards the front starting from the front end of the base. 
     
     
         15 . The projectile according to  claim 1 , which comprises a structure made of reversible deformation material, inserted on the axis, between the case and the core. 
     
     
         16 . The projectile according to  claim 2 , wherein said base is made from a thermoplastic material. 
     
     
         17 . The projectile according to  claim 2 , wherein said outer case is made from thermoplastic foam. 
     
     
         18 . The projectile according to  claim 2 , wherein the transversal wall of the base is extended towards the rear by a tubular wall, centered on said axis, delimiting an opening rear cavity. 
     
     
         19 . The projectile according to  claim 2 , wherein the transversal wall of the base is extended towards the front by a tubular extension, centered on said axis, in order to form a housing for receiving the rear end of the core made from aluminum foam. 
     
     
         20 . The projectile according to  claim 6 , wherein said rear tubular wall, or said front tubular extension, comprises an annular exterior guiding ring.