Patent ID: 6019897
Filing Date: 2000-02-01
Classification: B01D,G01N

Abstract:
Apparatus for simultaneously supplying solvent to a plurality of chromatography columns comprisinga plurality of pumps,each said pump having a pump chamber with a movable solvent piston therein and inflow and outflow valves, the outflow valve of each pump being connected to a respective chromatography column,a plurality of piston drivers operable to move said solvent pistons in one direction to pull solvent into said respective pump chambers until said pistons achieve respective stop positions corresponding to desired delivery volumes and to move said pistons in the opposite direction to deliver solvent to said respective columns,an adjustable stop for each said piston driver to adjustably determine said stop position, anda controller for simultaneously causing said piston drivers to simultaneously move said solvent pistons in said one direction and to simultaneously move said solvent pistons in the other direction.