Pressure tank

Claim 1

A pressure tank for receiving and storing gas under pressure from a gas generating source comprising a main pressure tank having an interior and side walls, a substantially flat base on said tank, a chamber for holding gas operatively attached to said base of said tank, said chamber having a curved forward wall extending into the interior of said tank, a check valve fixedly positioned in the forward wall of said chamber for allowing gases within said chamber to flow into the interior of said tank and for preventing gases in said tank from flowing into said chamber, a receptacle in the base of said tank in operative communication with the interior of said chamber, a replaceable charging cartridge positioned in said receptacle, said cartridge containing combustionable material suitable for producing gases, the forward end of said cartridge in operative communication with the interior of said chamber and the rearward end of said cartridge having a primer disposed therein exposed outside said receptacle, a closure cap removable to replace said charging cartridge and normally enclosing the rearward end of said cartridge positioned in said receptacle, a firing pin positioned in the center of said closure cap adjacent the rearward end of said cartridge, and a pivotally mounted striker operatively attached to the base of said tank for striking said firing pin upon release, said firing pin slidably positioned within said closure cap being urged forward to contact the primer with sufficient force to cause the primer to ignite and produce flames and hot gases causing the combustionable material in said cartridge to ignite thereby producing combustion gases which fill said chamber and pass through said check valve into said main pressure tank raising the pressure therein to a higher level whereby successive cartridges may be ignited to raise the pressure in the main pressure tank to a desired level.