Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1977-06-14
1978-12-05
Adee, John
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210101, 210137, 210138, 210198C, B01D 1508
Patent
active
041284763
ABSTRACT:
In the cycle of a positive displacement LC pump system the output pressure is sensed to measure onset of output flow as a time lag from the beginning of the output stroke to give an estimate of the input filling time lag from the beginning of the fill stroke. This estimate is used to recompute a proportional module output for controlling the timing of a proportioning valve at the inlet to the LC pump so as to bring the actual operating conditions of the pump fill cycle into correspondence with the predetermined demanded ratios of the components either in isocratic or gradient program mode.
REFERENCES:
patent: 3917531 (1975-11-01), Magnussen
patent: 4032445 (1977-06-01), Munk
patent: 4043906 (1977-08-01), Helmer
patent: 4045343 (1977-08-01), Achener et al.
Adee John
Spectra-Physics Inc.
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