초록 ▼

Reusable pressurized containers are disclosed for dispensing fluids from the container without release of the pressurized propellant to the surrounding environment. The propellant is contained in a sealed, flexible compartment positioned within the container as a mixture of gas and liquid under pres

Reusable pressurized containers are disclosed for dispensing fluids from the container without release of the pressurized propellant to the surrounding environment. The propellant is contained in a sealed, flexible compartment positioned within the container as a mixture of gas and liquid under pressure in equilibrium at the temperature of the container. A pressure transfer liquid, such as water, is used to liquefy the propellant in the compartment. The pressure transfer fluid also contacts the fluid or semi-solid to be dispensed and exerts pressure thereon to force the fluid to be dispensed out of the container. The liquefied propellant, as it vaporizes, maintains the pressure against the pressure transfer fluid essentially constant. The propellant in the flexible compartment is preferably a mixture of a liquefiable propellant gas or blend thereof and a nonliquefiable inert gas such as nitrogen or helium.

대표청구항 ▼

A method of reservoiring or dispensing a fluid product from a container, comprising: providing a closed container having an outlet opening therein, providing a product container having a flexible wall within the closed container, the product container in fluid communication with the outlet and holdi

A method of reservoiring or dispensing a fluid product from a container, comprising: providing a closed container having an outlet opening therein, providing a product container having a flexible wall within the closed container, the product container in fluid communication with the outlet and holding the product to be dispensed, enclosing a liquefiable propellant or mixture of liquefiable propellant and non-liquefiable gas in a separate, sealed compartment having a flexible wall, the sealed compartment positioned within the closed container out of contact with the product container holding the product to be dispensed, introducing a transfer fluid into the closed container for contact with the flexible wall of the compartment holding the liquefiable propellant or mixture of the liquefiable propellant and nonliquefiable gas and with the flexible wall of the container holding the product to be dispensed, the liquefiable propellant or mixture of liquefiable propellant and non-liquefiable gas exerting pressure on the product to be dispensed through the transfer fluid to cause exit of the product to be dispensed through the outlet opening.