High pressure liquid chromatography system

Details High pressure liquid chromatography system High pressure liquid chromatography system

1975-11-10

1977-08-30

Adee, John

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Proportionate feed means

73 611C, 210198C, B01D 1508

Patent

active

040453430

ABSTRACT:
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 for 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 positions 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.

REFERENCES:
patent: 3446057 (1969-05-01), Bakalyar et al.
patent: 3855129 (1974-12-01), Abrahams et al.
patent: 3917531 (1975-11-01), Magnussen
patent: 3934456 (1976-01-01), Munk
Introduction to Modern Liquid Chromatography, by Snyder and Kirkland, John Wiley and Sons, New York, pp. 97-102.

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