Hybrid gun system

Claim 1

A gun for utilizing liquid propellant to increase velocity of a projectile fired with a solid propellant charge comprising: a barrel having a breech end and a muzzle end and a bore extending therethrough: a chamber in said breech end configured to receive a cartridge therein; port means extending through said barrel intermediate said chamber and said muzzle end for passing gas therethrough; manifold means comprised of a plurality of sections concentrically surrounding said barrel and said plurality of sections spaced therefrom different distances for providing a liquid reservoir and positioned to enclose the port means therein; differentially shaped piston means to cooperate with said differentially spaced manifold sections fittingly sealing said liquid reservoir and configured to transmit gas pressure from said port means to said liquid reservoir; conduit means located in said barrel between said port means and said muzzle end and communicating with said liquid reservoir for passage of liquid therethrough, whereby movement of said piston under influence of said propellant gas pressure causes liquid injection within said bore, and a check valve concentrically held about said barrel within said manifold to selectively close said conduit means.