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| Number | Title | Issue Date |
| 8128821 | Reverse osmosis system with control based on flow rates in the permeate and brine streams A reverse osmosis system 110 includes a membrane chamber 112 having a feed line. The chamber 112 generates a permeate stream 114 and a brine stream 116 from the feed line 118. A feed pump 120 pressurizes the feed line... | 03/06/2012 |
| 7828972 | Self-reciprocating energy recovery device Disclosed is a self-reciprocating energy recovery device utilized in driving of a seawater pump by self-reciprocating a piston of a power recovery chamber and recovering energy not using an electronic drive unit but using the hydraulic power of concentrated water. T... | 11/09/2010 |
| 7799221 | Combined axial piston liquid pump and energy recovery pressure exchanger A pumping machine, that can serve a system as the sole main pump for pressurizing a primary liquid flow, incorporates, in a single machine, a rotor-drum type AP (axial piston) pump and a PX (pressure exchanger) that recovers energy from a secondary liquid flow such ... | 09/21/2010 |
| 7297268 | Dual head pump driven filtration system Improvements in product water throughput from a reverse osmosis (RO) membrane achieved by thinner feed spacers in the RO element (22), enhanced recovery (ratio of permeate to feed), pressure recovery of the retentate fluid pressure opposing the feed water pre... | 11/20/2007 |
| 7244357 | Pumps for filtration systems Improvements in product water throughput from a reverse osmosis (RO) membrane filter achieved by thinner feed spacers in the RO element, enhanced recovery (ratio of permeate to feed), pressure recovery of the retentate fluid pressure opposing the feed water pressure... | 07/17/2007 |
| 7214315 | Pressure exchange apparatus with integral pump A pressure exchange device is provided that utilizes an integral high pressure boost pump that is in fluid communication with a pressure exchange unit. An optional low pressure boost pump unit may also be provided. The pressure exchange unit comprises a rotating rot... | 05/08/2007 |
| 7207781 | Pressure exchange apparatus with dynamic sealing mechanism A pressure exchange device is provided that utilizes a rotor assembly inside a housing to transfer the pressure of a fluid from one high pressure fluid to another low pressure fluid. The housing may comprise a pressurized fluid contained therein to provide a sealing... | 04/24/2007 |
| 7189325 | Method and device for desalting water The invention pertains to a method and a device for desalting water by reverse osmosis, particularly for desalting seawater, in which saltwater is introduced under a first pressure into a pressure-compensation device and conducted from pressure-compensation device a... | 03/13/2007 |
| 7005075 | Gas drive electrolytic cell The present invention is directed to an electrolytic cell that is completely sealed during the electrolysis operation during production of oxidant. Gasses generated within the electrolysis operation, primarily hydrogen that is liberated at the cathode surface, incre... | 02/28/2006 |
| 6942797 | Filtration using pressure vessel with multiple filtration channels A filtration system includes an outer casing (210) that houses a plurality of elongated inner casings (220A–220F), which in turn house a plurality of filtration membranes. The outer casing, inner casing, and filtration membranes are disposed r... | 09/13/2005 |
| 6589423 | Filtration system with modularized energy recovery subsystem A filtration system has a plurality of filtration modules disposed within an outer casing, which produce both a low pressure filtrate and a high pressure waste fluid from a pressurized feed fluid. The subsystem used to pressurize the feed fluid is mechani... | 07/08/2003 |
| 6547965 | Large tube assemblies for reverse osmosis A modularized filtration system includes multiple production modules mechanically coupled in series to form a production chain, and fluidly coupled by parallel feed fluid, waste fluid, and product fluid flowpaths. The system also includes a turbine, work ... | 04/15/2003 |
| 6491813 | Equipment for desalination of water by reverse osmosis with energy recovery The equipment for desalination of water by reverse osmosis comprises: a pump 1 for drawing the water to be salinated, a high pressure pump 25, a cylindrical block 8 housing two pistons 3, 4 connected to one another by a shaft 5 and disposed, freely slidab... | 12/10/2002 |
| 6432301 | Device for obtaining a desalinated solution A device for producing a permeate from a concentrate has a separating chamber and a filter membrane dividing the separating chamber into a concentrate chamber and a permeate chamber. An inlet line is connected to the concentrate chamber and introduces the... | 08/13/2002 |
| 6365041 | Filtration process utilizing heat exchanger apparatus A filtration system utilizes a heater 40 and a heat exchange subsystem for elevating the temperature of a feed stream to a membrane filtration unit 12. Upstream from the unit 12, a solids-liquid stream is divided into two streams 32, 33 that pass through ... | 04/02/2002 |
| 6300142 | Device and apparatus for conducting an assay A apparatus for assaying glycated proteins and other analytes in biological samples such as blood, in which a sample is presented to the apparatus, includes an inlet port between moveable between first and second inlets, such that the inlet can be brought... | 10/09/2001 |
| 6299766 | Reverse osmosis filtering apparatus with concentrate dilution Liquid filtering apparatus includes a plurality of reverse osmosis filters for receiving seriatim under pressure a mixture of feed liquid and recirculated concentrate. Feed liquid such as salt water is introduced into the inlet of each reverse osmosis fil... | 10/09/2001 |
| 6203696 | Fluid driven pumps and apparatus employing such pumps A reverse osmosis or filtration system uses one or more hydraulic intensifiers (integrated motor and pump) to provide all the high pressure fluid to a semi-permeable membrane or filter, the intensifier being powered by the high pressure flushing flow leav... | 03/20/2001 |
| 6139740 | Apparatus for improving efficiency of a reverse osmosis system A reverse osmosis water purification system comprises an impulse turbine operatively connected to a source of water to be purified. A feed pump is connected to the impulse turbine to supply a source of high pressure water to be purified. A first purificat... | 10/31/2000 |
| 5948247 | Disinfection arrangement for dialysis machines Apparatus for disinfecting dialysis devices are disclosed including a first circulation conduit for circulating a first fluid through at least a portion of the supply conduit to a dialyzer in order to disinfect that portion of the supply conduit and a sec... | 09/07/1999 |
| 5725758 | Filtration system and assembly A filtration system and assembly for liquid mixture applications is disclosed. The system comprise of a pump, filter, venturi, and by-pass that incorporates a flow control valve. The flow control valve controls the flow and pressure of the retentate there... | 03/10/1998 |
| 5647984 | Extracorporeal fluid treatment systems selectively operable in a treatment mode or a disinfecting mode An extracorporeal fluid treatment apparatus which is selectively operable in a disinfecting mode or a treatment mode includes an inlet line, a pre-treatment portion, an input pump, a heater, an input shunt, a filtration device, a post-treatment portion, a... | 07/15/1997 |
| 5567312 | Pressure and recirculating pump for concentrating a solution A pump comprises two discrete series of pumping stages, the first having a lower liquid output than the second. The liquid is recirculated from a processing enclosure in particular using reverse osmosis, nanofiltration or the like, to the second series of... | 10/22/1996 |
| 5503739 | Heat dissipating device for water purifier's thermoelement An improved heat dissipating device for water purifier's thermoelement is disclosed. The device selectively uses either the fresh water or waste water of a membrane as refrigerant to absorb and dissipate heat of the thermoelement's hot junction. The above... | 04/02/1996 |
| 5395514 | Ultrafiltration system and assembly A portable ultrafiltration device is disclosed comprising a centrifugal pump, membrane filter and an eductor means, arranged at or before the inlet of the centrifugal pump in a recycle loop from the ultrafiltration system and functioning to replenish filt... | 03/07/1995 |
| 5306428 | Method of recovering energy from reverse osmosis waste streams Hydraulic energy is recovered from the waste brine through a control device, having a central rotatable spool piece controlling fluid flow paths therethrough. The control device, in turn, directs the brine stream of reverse osmosis systems by diverting th... | 04/26/1994 |
| 5193988 | Reverse osmosis system and automatic cycling booster pump therefor A reverse osmosis system including a reverse osmosis filter with a reverse osmosis membrane and having an inlet port coupled to a source of feed water under predetermined pressure via a feed water inlet conduit, a product water outlet port for filtered ou... | 03/16/1993 |
| 4983305 | Power recovery pump turbine The invention is directed to an energy recovery pump turbine for use in industrial processes where a fluid is pumped at a high pressure to the process and at least a portion of the fluid is discharged from the process at a high pressure. A turbine is posi... | 01/08/1991 |
| 4983301 | Method and apparatus for treating fluids containing foreign materials by membrane filter equipment A raw fluid containing foreign materials is led to the inlet of a membrane filter equipment (10) which provides on the one hand a concentrate containing more foreign materials than that of the raw fluid, on the other hand a permeate containing less foreig... | 01/08/1991 |
| 4973408 | Reverse osmosis with free rotor booster pump Apparatus and process for reverse osmosis or other pressure-driven membrane fluid separations, with a free rotor booster pump to increase the pressure of a feed fluid from an initial feed pressure to a working pressure at which perm-selective membranes se... | 11/27/1990 |
| 4842725 | Assembly for making up untreated water according to the principle of reverse osmosis The inventive assembly comprises a driven feed pump fed with untreated water, and a water circuit connected thereto with a driven circulation pump and a reverse osmosis unit, wherefrom subsequent to the reverse osmosis treatment part of the water is avail... | 06/27/1989 |
| 4804474 | Energy efficient dialysis system An energy efficient dialysis system which requires a minimal amount of energy to operate and maintains critical operating temperatures for effective reverse osmosis and dialysis. The system includes a hot fluid inlet for causing a flow of washing fluid, a... | 02/14/1989 |
| 4770770 | Water supply system using reverse osmosis unit for treatment of water supply A water supply system for use in connection with a variety of water using equipment such, for example, as commercial ice makers and commercial steam cooking equipment wherein the water supply system utilizes a reverse osmosis unit thereby providing water ... | 09/13/1988 |
| 4756830 | Pumping apparatus The pumping apparatus disclosed herein recovers pumping energy required in feeding solution to a reverse osmosis unit. The reverse osmosis unit generates a purified product but also a concentrate stream which is discharged at a pressure only slightly lowe... | 07/12/1988 |
| 4645599 | Filtration apparatus In the reverse osmosis pumping system disclosed herein, a pair of work exchange vessels are located at two different heights. By means of a dense working fluid coupling one side of each of the vessels, an increased static head is maintained on one side of... | 02/24/1987 |
| 4632754 | Desalination apparatus Reverse osmosis liquid filtration apparatus, which apparatus comprises an inlet conduit, a reverse osmosis chamber, a pump for pumping liquid to be filtered from the liquid inlet conduit to the reverse osmosis chamber, a reverse osmosis membrane positione... | 12/30/1986 |
| 4410429 | Linear pocket energy exchange device An hydraulic energy recovery system for sea water desalinization reverse osmosis processes wherein a tube receives salt water at low pressure and a conveyor in the tube transports the low pressure liquid to a first station where the salt water is pressuri... | 10/18/1983 |
| 4367140 | Reverse osmosis liquid purification apparatus In apparatus for the reverse osmosis purification of water or other fluid in a module containing a membrane, the water is forced into the module under pressure using two piston-cylinder assemblies mechanically interconnected with the pressurized fluid fro... | 01/04/1983 |
| 4321137 | Apparatus for processing liquids such as water and the like by reverse osmosis An apparatus for processing liquids such as water or the like by means of a reverse osmosis device has a main pump which provides an entrance pressure to the reverse osmosis device in connection with a throttle. In order to avoid any losses of energy, ano... | 03/23/1982 |
| 4288326 | Rotary shaft driven reverse osmosis method and apparatus Reverse osmosis, particularly for water desalination, uses semipermeable membranes which selectively permeate purified water from a feed solution pressurized by a reciprocating feed pump driven by rotating crankshaft. Pump action is assisted by depressuri... | 09/08/1981 |
