Patent ID: 8746503

Claim:
A gas storage and delivery system for restoring pressure as it is depleted from a pressurized container, comprising: a container holding a product under pressure to be dispensed from the container, said container having a normally closed discharge valve through which said product is dispensed when the valve is opened; a quantity of gaseous material under pressure in the container, occupying a space in the container and applying to the product a predetermined pressure of from about 30 to about 180 psig to discharge product from the container when the valve is opened, said gaseous material comprising one of carbon dioxide and nitrous oxide; a quantity of gas-adsorbing material in the container, said gas adsorbing material comprising one of activated carbon, zeolite, alumina, and a carbon fiber composite molecular sieve; a reserve supply of gaseous material adsorbed on the gas-adsorbing material, said reserve supply of gaseous material being desorbed from the gas-adsorbing material and released into the container in response to a decrease in pressure in the container, thereby restoring and maintaining a predetermined pressure in the container as product is depleted from the container; and wherein said gas-adsorbing material is pre-wetted with a release-promoting agent at the time of manufacture of the container to cause desorption of at least about 90 percent of the sorbed gas from the gas-adsorbing material during use of the system.