Abstract: An automatic detachable charging head for use with a check valve in operative communication with the charging head to allow gases therefrom to flow into the tank and a pressure safety release mechanism to prevent over pressurization. The detachable charging head fits onto the pressure storage container and includes a cartridge containing gas producing material. In the automatic embodiment of the invention, the detachable charging head includes a belt for feeding the cartridges into a firing breech contained therein and a pressure sensing switch in the pressure tank for causing the belt to stop feeding and the cartridges to stop firing when the tank pressure reaches a predetermined desired value.

Abstract: A pressurized storage tank including a chamber in the base thereof for holding a cartridge containing gas producing combustible material which is discharged by causing a firing pin to strike a primer. A check valve in communication with the chamber and tank interior allows the gas from the discharged cartridge to flow in one direction only, from the chamber into the tank. A safety blowout plug prevents over-pressurization and appropriate gauges are provided to measure the internal tank pressure and the outlet line pressure.