Muzzle Brake for Underwater Gun
Patent, Filed 19 May 97, patented 5 May 98
DEPARTMENT OF THE NAVY WASHINGTON DC
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A device for use as a muzzle brake for an underwater gun having a projectile conveying structure with concentric inner and outer cylinders. The inner cylinder has at least one longitudinal slot formed therein. A sealing means joins the projectile conveying structure to the underwater gun at the structures first end. A second end of the structure is provided with a seal for closing the second end after a projectile is fired through it. A piston having an aperture there through is positioned inside the inner cylinder and is axially moveable therein adjacent the longitudinal slot. An actuator is positioned between the inner cylinder and the outer cylinder. Actuator links through the longitudinal slot connect the piston with the actuator. After a projectile is fired through the projectile conveying structure to displace the piston from its initial position, the actuator means returns the piston to that initial position to ready the device for reuse.