Pumps – Expansible chamber type – Selectively usable plural inlet or outlet distributors for...
Patent
1998-09-04
2000-09-12
Yuen, Henry C.
Pumps
Expansible chamber type
Selectively usable plural inlet or outlet distributors for...
417503, F04B 2302, F04B 5300
Patent
active
061168696
ABSTRACT:
The present invention is a pumping system which mixes liquids with a well-controlled proportioning and flow rate. The pumping system according to the invention comprises a liquid mixing device (MX) placed upstream from a pump (P). The liquids are taken from vessels (RA, RB), cyclically introduced, in a determined proportion, in a mixing chamber (9) through alternate opening of on-off solenoid valves (EVA, EVB). The system is controlled at the input by using a damping means such as bellows (11A, 11B) in antechambers (8A, 8B) in order to avoid the effects of velocity discontinuities at the time of the opening and of the closing of the valves. The delivery of pump (P) is controlled at the input as well as at the discharge end. The system may be used for liquid chromatography plants.
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Couillard Fran.cedilla.ois
Renot Andre
Castro Arnold
Institut Francais du Pe'trole
Yuen Henry C.
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