Patent ID: 7541563

Claim:
A projectile device comprising: a cylinder with variable outer diameters, having a cylindrical hollow spanning the entire altitude of said cylinder and having cover means to close the rear-end base of said cylinder; external means to hold back a canister, filled with a primer-containing combustive material and locked with a piston, inside said cylindrical hollow; an induction heating linear actuator to fire said primer-containing combustive material, leading to the combustion of said primer-containing combustive material effecting the release of said piston from said canister and the ejection of said piston from said cylinder by the pressure of post-combustion exhaust gases from said combustion; said piston is at least of outer metallic electrically conductive construction and is imparted a rotatory motion by an electromagnetic rotor means; a trigger command for an electronically controlled activation of said induction heating linear actuator to fire said primer-containing combustive material leading to said combustion and said release of said piston from said canister; and an electric power source to supply electric power.