Patent ID: 6527951
Filing Date: 2003-03-04
Classification: B01D,G01N

Abstract:
A chromatography column for use with a chromatographic pump having a solute conduit, comprising:a cylindrical tube having a cylindrical wall having a interior surface, an exterior surface, a first face and a second face, said interior surface defining a chamber, said first and second face between said interior and exterior surfaces and with said interior surface, defining two openings to said chamber, at least one of said first and second faces having a circular planar surface for receiving a filter element said circular planar surface having a inside diameter and an exterior diameter; a filter element received on said flat planar surface of said at least one face, said filter element having a screen having a top surface, a bottom surface, and a diameter greater than the diameter of said inside diameter of said circular planar surface, said screen having a coating of a plastic material, said plastic material positioned on said screen in a circular ring defining a area substantially free of said plastic material in the center of said screen, said plastic material engaging said flat planar surface in sealing engagement upon compression upon said top surface; at least one end-fitting assembly at the said at least one face, said end fitting assembly having a fitting body having a tube opening for receiving said exterior wall of said tube, said tube opening having a lip extending radially inward to receive said filter element on said bottom surface and engage said coating in sealing relationship upon compression, said lip defining an lip opening having a diameter greater than the diameter of said solute conduit for receiving said solute conduit in sealing engagement with said filter element on said coating upon compression; said at least one end fitting for receiving a solute conduit and placing said chamber in fluid communication with a chromatographic solute through said filter.