Abstract: A method and apparatus for dispensing a liquid, such as a fire suppressing gent, with a gas wherein both the liquid and a combustible propellant for generating the gas are stored in separate sealed compartments at atmospheric pressure. The liquid is stored in a chamber between an annular piston and a central pedestal containing a gas generating canister. A portion of the gas generated drives the piston to expel the liquid into a mixing chamber in the pedestal, and another gas portion is fed into the mixing chamber so as to mix with and propel the liquid through a nozzle. The liquid may be atomized or vaporized depending on its composition. Mixing of the liquid with the gas may be enhanced by tangentially injecting the liquid into the mixing chamber.

Abstract: A method and apparatus for injecting a liquid through a liquid passage cocting a liquid chamber to an outlet in the vicinity of the entrance of a gun bore. The liquid is forced through the passage by a piston movable in the liquid chamber in response to the pressure of a gas generated in a propellant chamber by combustion of a propellant for propelling a projectile down the bore. Two pistons and two liquid chambers may be arranged opposite to each other in a common plane with the propellant chamber and the outlets of the liquid passages may be located substantially opposite to each other in a wall of the bore. Each liquid passage may be arranged to inject the liquid in a tangential direction relative to the longitudinal axis of the bore so that centrifugal forces spread the liquid as a film around the circumference of the bore. Valves may be provided to close the respective liquid passages in the absence of pressure in the liquid chambers.

Abstract: A high pressure spray injector having an injector body with an interior cavity and a pedestal located within this cavity, the pedestal having an interior cavity and firmly attached to the bottom of the injector body. Coaxial with the injector body and the pedestal is an annular piston having an end cap and an interior cavity within. The annular piston is in sliding contact with the injector body and the pedestal. A stationary piston is coaxially located within the annular piston and also has an interior cavity. At the end of the stationary piston is a nozzle with an orifice. The annular pistion is also in sliding contact with the stationary piston. A pintle rod is located within the stationary piston to open and close the orifice in the nozzle. As the annular piston is caused to move upward, a fluid is injected in the top part of the annular piston and the interior of the stationary piston.

Abstract: An electrical igniter for a regenerative liquid propellant gun is disclosed hich includes a combustion chamber for receiving a charge of liquid gun propellant, an electrode for igniting the liquid gun propellant, and a valve assembly for releasing the igniting propellant into a gun combustion chamber to start a regenerative combustion process therein.