Patent ID: 6619336
Filing Date: 2003-09-16
Classification: F17C,Y02E

Abstract:
A system for dispensing pressurized gas, comprising:(a) a pressurized gas source; (b) a receiving tank; (c) a sealed gas flow line connected between said gas source and said receiving tank; (d) a valve in said gas flow line for initiating and terminating flow of the pressurized gas between the gas source and the receiving tank, said valve operable by a valve signal; (e) an electronic controller; (f) a temperature sensor, said temperature sensor for sensing temperature of a gas inside the receiving tank, said temperature sensor including a temperature signal generator for generating a temperature signal corresponding to the temperature of the pressurized gas in the receiving tank, said temperature signal adapted to be received by the electronic controller; (g) a pressure sensor, said pressure sensor for sensing pressure of a gas inside the receiving tank, said pressure sensor including a pressure signal generator for generating a pressure signal corresponding to the pressure of the gas inside the receiving tank, said pressure signal adapted to be received by the electronic controller; (h) wherein the electronic controller is adapted to store a tank rated density and the temperature and pressure signals; (i) wherein the electronic controller is adapted to periodically calculate a density of the gas in the receiving tank based on the temperature and pressure signals; and (j) wherein the electronic controller is adapted to periodically compare the density of the gas in the receiving tank with the tank rated density and initiate flow of pressurized gas through the valve by generating the valve signal when the density of gas in the receiving tank is below the tank rated density and terminate flow of pressurized gas through the valve by generating the valve signal, when the density of the gas in the receiving tank reaches the tank rated density.