Patent ID: 6378737
Filing Date: 2002-04-30
Classification: G01F

Abstract:
A dispensing system for dispensing a quantity of material, the dispensing system comprising:an inlet port to receive material; an outlet port from which the material is dispensed from the dispensing system; a housing including an inner chamber having an adjustable volume, a first opening through which material enters into the inner chamber, and a second opening through which material exits the inner chamber; a first valve operable in one of an open mode of operation and a closed mode of operation, the first valve being disposed between the inlet port and the first opening in such a manner that when the first valve is operating in the open mode, material may flow from the inlet port through the first opening into the inner chamber, and when the first valve is operating in the closed mode, material is prevented from flowing from the inlet port into the inner chamber; a second valve operable in one of an open mode of operation and a closed mode of operation, the second valve being disposed between the outlet port and the second opening in such a manner that when the second valve is operating in the open mode, material may flow from the inner chamber through the second opening to the outlet port, and when the second valve is operating in the closed position, material is prevented from flowing from the inner chamber to the outlet port; and a reservoir to contain material for dispensing, the reservoir having an outlet coupled to the inlet port to provide the material for dispensing, and having an inlet to couple to a source of pressure to pressurize the material in the reservoir.