Multilayered bulletproof device

Abstract

Multilayered bulletproof device including a first layer external during use, provided with a first surface external during use, suitable to receive firearm bullets, a second surface internal during use, a second layer internal during use, disposed facing the second surface of the first layer and defined by a plurality of fibers, where the first layer is made of metal material and the first surface of the first layer is provided with a plurality of protruding portions distributed uniformly, one adjacent to the other, on the first surface.

1 . Multilayered bulletproof device comprising:
 a first layer facing toward the outside during use, made of metal material and provided with a first surface facing toward the outside during use, suitable to directly receive firearm bullets, and having a plurality of protruding portions distributed uniformly, one adjacent to the other, on said first surface and with a second surface facing toward the inside during use, and   a second layer facing toward the inside during use, disposed facing said second surface of said first layer and defined by a plurality of fibers,   wherein said protruding portions have a pyramid shape with a polygonal base defined by a plurality of walls converging toward a vertex and wherein the device further comprises a third layer configured as a plate, made of metal material, disposed facing and resting on the second layer on the opposite side to the side in contact with said first layer.   
     
     
         2 . Multilayered bulletproof device as in  claim 1 , wherein said first layer is obtained by a forging operations. 
     
     
         3 . Multilayered bulletproof device as in  claim 1 , wherein the metal material that said first layer is made of is chosen from a group consisting of titanium, alloys of titanium, super alloys, high-resistance steels. 
     
     
         4 . Multilayered bulletproof device as in  claim 1 , wherein said protruding portions are distributed on said first surface according to a matrix configuration. 
     
     
         5 . Multilayered bulletproof device as in  claim 1 , wherein said protruding portions have a conical shape or a pyramidal shape. 
     
     
         6 . Multilayered bulletproof device as in  claim 1 , wherein said vertex has an angle at the vertex with an amplitude comprised between 70° and 120°. 
     
     
         7 . Multilayered bulletproof device as in  claim 1 , wherein it comprises at least a protective layer disposed resting on the first surface to cover the entire surface development of the latter, and configured to contain possible fragments that are generated following the impact of a bullet against said first layer. 
     
     
         8 . Multilayered bulletproof device as in  claim 7 , wherein said protective layer comprises at least one of a metal plate and a layer of fibers. 
     
     
         9 . Multilayered bulletproof device as in  claim 1 , wherein said second surface comprises a plurality of cavities each made in correspondence to one of said protruding portions and wherein said cavities have a shape substantially mating in a negative with said protruding portions. 
     
     
         10 . Multilayered bulletproof device as in  claim 1 , wherein said fibers that said second layer is made of comprise at least one of aramid fibers, carbon fibers, fabrics with a synthetic base or a natural base. 
     
     
         11 . Multilayered bulletproof device as in  claim 1 , further comprising a plurality of first layers disposed overlapping each other. 
     
     
         12 . Method to make a multilayered bulletproof device, comprising:
 making a first layer with metal material to define a first surface facing toward the outside during use, having a plurality of protruding portions distributed uniformly, one adjacent to the other, on said first surface   making a second layer with a plurality of fibers;   disposing the second layer facing toward the inside during use and facing a second surface of the first layer opposite the first surface   wherein during the making of said first layer said protruding portions are obtained with a pyramidal shape with a polygonal base defined by a plurality of walls converging toward a vertex and wherein the method further comprises making a third layer configured as a plate made of metal material, and disposing the third layer facing and resting on the second layer on the opposite side to that in contact with the first layer.   
     
     
         13 . Method as in  claim 12 , wherein the first layer is obtained a forging operations. 
     
     
         14 . Method as in  claim 12 , wherein said first layer is subjected to at least a heat treatment comprising at least one of a solubilization treatment, an ageing treatment, and an annealing treatment. 
     
     
         15 . Method as in  claim 12 , further comprising making a protective layer configured to contain possible fragments that are generated following the impact of a bullet against said first layer and disposing said protective layer resting on said first surface of said first layer. 
     
     
         16 . Multilayered bulletproof device as in  claim 6 , wherein said vertex has an angle at the vertex with an amplitude comprised between 80° and 100°. 
     
     
         17 . Multilayered bulletproof device as in  claim 6 , wherein said vertex has an angle at the vertex with an amplitude comprised of about 90°.