Pumping process and system for mixing liquids
US6116869A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1998 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Sep 4, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/065
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.