Patent ID: 7445662
Filing Date: 2008-11-04
Classification: B01D,F16K

Abstract:
1. A valve assembly for a gas purification system in which the gas purification system includes a plurality of vessels each having a first port opening and a second port opening, the valve assembly comprising: a drive unit including at least one of, a first valve element having a first aperture to selectively connect a first port opening of one of said plurality of vessels to an outlet of the first valve element, said first valve element further including a first passageway for selectively interconnecting first port openings of a pair of said plurality of vessels, wherein said first valve element is intermittently moved by said drive unit such that intermittent movement of the first valve element changes the vessel connected to said first aperture and changes the pair of vessels connected by said first passageway; and a second valve element having a second aperture to selectively connect a second port opening of one of said plurality of vessels to an input of the second valve element, wherein said second valve element is intermittently moved by said drive unit such that intermittent movement of the second valve element changes the vessel connected to said second aperture.