Pliant firearm projectiles

F - Mech Eng,Light,Heat,Weapons – 42 – B

Patent

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Details

F42B 12/34 (2006.01) F42B 5/02 (2006.01) F42B 12/74 (2006.01)

Patent

CA 2405998

A less lethal ammunition round (10) includes a highly pliant projectile (24) that may impregnated with fine heavy particles. The projectile has an interior void (32) into which is placed a force transfer member (30) that engages an interior surface at the forward end of the projectile in front of the center of gravity. Upon ignition of a powder charge, a piston (26) in the cartridge chamber engages the transfer member which, in turn, elongates the projectile as the projectile forward end is driven, pulling the remainder of the projectile, reducing its diameter. This allows a release from the cartridge and passage through the barrel of the weapon from which it is being fired. Stabilizing fins (39) at the projectile base deploy as the projectile exits the muzzle. A breaching round is impregnated with a greater weight of heavy particles and its transfer member has an initial large diameter portion and a terminal smaller diameter portion. The breaching projectile similarly has a large diameter initial void and a smaller diameter terminal void. As the transfer member is urged forward, the forward part of the projectile is extended until the transfer member shoulder engages a similar shoulder in the void and no further elongation of the projectile occurs. The elongation is sufficient to release the projectile from the cartridge and permit it to travel through the weapon barrel without obstruction and without damage to the projectile.

L'invention concerne un obus moins dangereux qui comporte un projectile très souple pouvant être imprégné de fines particules lourdes. Le projectile comporte un vide intérieur dans lequel est placé un élément de transfert de force qui touche une surface intérieure à l'extrémité avant du projectile, devant le centre de gravité. Lors de la mise à feu d'une charge de poudre, un piston dans la chambre de la cartouche contacte l'élément de transfert qui, à son tour, allonge le projectile tandis que l'extrémité avant de ce dernier est entraînée, ce qui sollicite le reste du projectile et réduit son diamètre. Cela permet à la charge de poudre de sortir de la cartouche et de traverser le canon de l'arme. Des surfaces de stabilisation situées à la base du projectile se déploient lorsque le projectile sort de la bouche de l'arme. Un obus de rupture est imprégné d'une quantité plus importante de particules lourdes et son élément de transfert comporte une partie proximale à large diamètre et une partie distale au diamètre plus petit. Le projectile de rupture, de la même façon, comporte un vide proximal à large diamètre et un vide distal au diamètre plus petit. Alors que l'élément de transfert est poussé vers l'avant, la partie avant du projectile est allongée jusqu'à ce que l'épaulement de l'élément de transfert contacte un épaulement similaire dans le vide et que l'allongement du projectile cesse. L'allongement est suffisant pour libérer le projectile de la cartouche et lui permettre de se déplacer à travers le canon de l'arme sans être gêné ni subir de dégâts.

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