High pressure liquid chromatography system

Details High pressure liquid chromatography system High pressure liquid chromatography system

B - Operations, Transporting

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B01D 15/08 (2006.01) F04B 49/20 (2006.01) G01N 30/36 (2006.01) G01N 30/32 (2006.01)

Patent

CA 1077739

PATENT APPLICATION Of PIERRE Y. ACHENER, DETLEF R. BOEHME, KENNETH C. JUDAH and MINER N. MUNK HIGH PRESSURE LIQUID CHROMATOGRAPHY SYSTEM Abstract of the Disclosure A high pressure liquid chromatography system including a reservoir for a liquid mobile phase, an LC column and detector, a high pressure reciprocating pump for enabling flow from said reservoir through the column, and a positively actuated inlet valve controlling flow from the reservoir to the pump chamber. The pump is driven by motor means, such as a stepping motor, directly coupled thereto; and the inlet valve is actuated by the power train of the motor and pump, e.g. by an eccentric carried by the pump crank shaft, The pump piston is similarly driven by an eccentric, the pump and inlet valve eccentrics being angularly displaced in their respective position, at the crank shaft, as to delay opening of the inlet valve for a predetermined period following a pump stroke, so as to enable decompression of the liquid in the pump chamber.

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