Patent ID: 9267766
Filing Date: 2016-02-23
CPC Classification: F41H

Claim Text:
1. An armoured ventilation grille for an opening, said grille comprising an outer side intended to be exposed to a projectile firing and an inner side intended to be applied on the opening, said grille comprising a plurality of bars parallel to each other, the bars having a V-shaped section, each arm of the V being constituted by a blade, said blades being arranged in chevrons in order to form baffles such that at least one blade is on the trajectory of the projectile firing regardless of its incidence, each bar comprising a so-called outer blade and a so-called inner blade, the outer blades forming the outer side of the grille and the inner blades forming the inner side of the grille, wherein the outer blades are made of an armour material while the inner blades are made of a ductile material, the blades being all removably fixed to transverse spars at bearing surfaces.