Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2007-06-12
2007-06-12
Fortuna, Ana (Department: 1723)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S321690, C210S321740, C210S321830, C210S636000, C210S222000, C204S164000, C204S660000
Reexamination Certificate
active
10767119
ABSTRACT:
A reverse osmosis system is subject to long periods of non-use in which water stands inside. A hollow-cylindrical spiral-wound type reverse osmosis membrane is disposed inside a cylindrical pressure vessel. An electrostatic-field generator is disposed inside the pressure vessel. A high voltage direct current source powers the electrostatic-field generator and a voltage gradient is constantly produced inside the volume of the pressure vessel. Such gradients cut through the fabric of the reverse osmosis membrane layers. The voltage to the electrostatic-field generator is kept on at all times, and prevents biofouling, even during lay-up periods. Current flow through the electrostatic-field generator is insignificant because it acts as a high-Z capacitor.
REFERENCES:
patent: 5139695 (1992-08-01), Eckhardt
patent: 5203993 (1993-04-01), Arbisi
patent: 5217607 (1993-06-01), Dalton et al.
patent: 5591317 (1997-01-01), Pitts, Jr.
patent: 6332960 (2001-12-01), Monteith
patent: 6451208 (2002-09-01), Ledoux
patent: 6652715 (2003-11-01), McLaine
patent: 6783687 (2004-08-01), Richard
patent: 6795298 (2004-09-01), Shiue et al.
patent: 6913383 (2005-07-01), Jorimann et al.
LandOfFree
Low-maintenance watermaker does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low-maintenance watermaker, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-maintenance watermaker will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3808986