Patent ID: 8006873
Filing Date: 2011-08-30
Classification: B65D

Abstract:
1. A pressure package system for pressurizing a fluid to be delivered, the system comprising: a pressure package comprising: a high-pressure chamber configured to hold the propellant in supply at a pressure higher than the working pressure, a pressure controller in a fluid connection between the working pressure chamber and the high-pressure chamber, the pressure controller being disposed within the high-pressure chamber and comprising a reference pressure chamber confining a gas at a reference pressure, a cylinder in the high-pressure chamber having first and second open ends, the first open end connecting to the opening of the working pressure chamber, and the second open end being closed off by the pressure controller, and a flexible wall, at least a portion of a first side of the flexible wall bounding at least a portion of the working pressure chamber and a second side of the flexible wall facing away from the working pressure chamber, at least a portion of the second side of the wall bounding at least a portion of the product chamber, wherein, the pressure controller is configured to supply the propellant from the high-pressure chamber to the working pressure chamber to keep the working pressure in the working pressure chamber substantially constant and the supply of the propellant to the working pressure chamber is determined based on the reference pressure.