Patent ID: 7930975

Claim:
A deconfinement device for the casing of a piece of ammunition enclosing an explosive load able to be ignited by a priming fuse, the deconfinement device comprising: a connecting ring linked to the casing and enabling the priming fuse to be joined to the casing, a shearable link between the fuse and the connecting ring, wherein the shearable link shears by a predetermined increase in a pressure inside the casing, wherein the connecting ring comprises a base comprising a plate portion that projects onto the explosive load during an ignition of the priming fuse, the base being configured to be fractured by a pressure inside of the body of the projectile, wherein the shearable link comprises an intermediate ring that is positioned between the connecting ring and the fuse, and the intermediate ring is linked to the connecting ring by a shearable element, and wherein the intermediate ring comprises a female threaded portion that receives the fuse, and the shearable element is arranged at an external surface of the intermediate ring.