Backpack personal defense material dispenser

A backpack material dispenser, comprising:

• a. a pumpless pressure tank for storing and discharging a material under pressure contained in the pressure tank;
• b. a hose and a shut off valve connected to an output opening of the pressure tank for allowing flow of the material from the pressure tank under pressure and through a nozzle communicating with a discharge end of the hose;
• c. a discharge valve communicating with the hose and nozzle and adapted to permit controlled discharge of the material from the nozzle;
• d. a charging tank adapted to contain a gas under pressure to charge the pressure tank to a predetermined pressure;
• e. a charging valve adapted to attach to and communicate with the charging tank for charging the pressure tank with the gas under pressure to the suitable pressure tank pressure;
• f. a tee connector interconnecting the shutoff valve and a fill valve for selectively permitting the pressure tank to be supplied with material when the shutoff valve is in a closed position and to be pressurized by the charging tank when the charging valve is connected to the shutoff valve in an open position allowing pressurized gas to flow from the charging tank through the open shutoff valve into the pressure tank;
• and
• g. a backpack assembly adapted to mount the pressure tank for being carried by a user.