Patent ID: 7874091
Filing Date: 2011-01-25
Classification: F41A,F41C,F41F

Abstract:
1. An underwater gun, comprising: a barrel, wherein the barrel has a muzzle-end and an axially-oriented first bore; a water-impermeable disk that is capable of being attracted by a magnetic field; a drive system that generates a magnetic field that move the disk into a sealing position wherein the disk aligns with the first bore, wherein the drive system comprises: (a) a wire disposed proximal to the muzzle end of the barrel, wherein when the wire receives a current, it generates the magnetic field; and (b) a current source that is electrically coupled to the wire; and a controller, wherein the controller signals the drive system to either: (i) stop or reduce the flow of current to the wire when the gun is to be fired; or (ii) apply current to the wire to generate the magnetic field to move the disk to the sealing position.