|Publication number||US3825122 A|
|Publication date||Jul 23, 1974|
|Filing date||Jun 11, 1973|
|Priority date||Jun 11, 1973|
|Publication number||US 3825122 A, US 3825122A, US-A-3825122, US3825122 A, US3825122A|
|Original Assignee||J Taylor|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (73), Classifications (19)|
|External Links: USPTO, USPTO Assignment, Espacenet|
ite States Patent 'laylor i I REVERSE-OSMOSIS PUMP  Inventor: Julian S. Taylor, 8300 S.W.8,
Oklahoma City, Okla. 73108  Filed: June 11, 1973  Appl. No.2 369,034
52 U.s.c1... ..210/134,210/136,2l0/137, 210/321, 417/323, 417/401, 417/404 51 1111.01 B01d 31/00  Field of Search 417/323, 390, 401,404,
 References Cited UNITED STATES PATENTS 3,530,873 9/1970 Arp ..417/404X 3,700,360 10/1972 Shaddock ..4l7/390X Primary Examiner-Frank A. Spear, Jr, 7 Assistant ExaminerFerris H. Lander Attorney, Agent, or Firm-Robert K. Rhea 1111 3,825,122 14 1 Jul /23,1974
[5 7] ABSTRACT A multiple stage pump comprising a main chamber, a booster chamber and a driving chamber each having a piston therein with the pistons interconnected by a common piston rod for reciprocating the pistons in unison. Main conduit means connects the main chamber with a fluid supply and the inlet of a reverseosmosis device. Second conduit means connects the fluid reject discharge port of the reverse-osmosis device with the booster chamber. Hydraulic pump means including a pressure compensated pump and hydraulic conduits connected with a hydraulic fluid reservoir is connected with the driving chamber. Control means actuated by the reciprocating action of the piston rod operates valve devices in the hydraulic-conduits and second conduits to maintain a continuous flow of fluid, under a predetermined pressure, fromthe main chamber to the reverse-osmosis device.
10 Claims, 2 Drawing Figures PATENIEUJUL23I9H sum 2 or 2 FlG.2
REVERSE-OSMOSIS, PUMP' BACKGROUND OF THE INVENTION 1. Field of thelnvention. v
The present invention relates to fluid pumps and more particularly to a hydraulically driven mu'lti-stage pump for a hollow-fibepreverse-osmosis device which utilizes the kinetic energy of a pressurized stream of reject fluid as a booster in driving the pump.
The principle of reverse-osmosis is used to separate components of fluid, such as fractionating a salts solution, brackish water, for example, into a relatively saltfree effluentand a saltsconcentrated effluent. This is accomplished by subjecting the fluidfeed to a pressure higher than its osmotic pressure and bringing it into contact with a semipermeable membrane in a container so that the pressure drives'water ions through the membrane. The reject salts-concentrated water, under proportionate pressure, is discharged from the container.
- erated pump is disclosed by US. Pat. No. 2,500,624
which utilizes a spring at one end of the main cylinder for returning the piston therein to the downwardly disposed end thereof. j, I
This invention is distinctive over hydraulically operated pumps presently in use by providing a plurality of axially aligned cylinders, each having a piston therein connected with'a piston rod common to all cylinders I and forming a main pumping chamber and abooster pumping chamber with the booster pumping force supplemented by a hydraulic pumping means connected with a third cylinder.
SUMMARY OF THE INVENTION A plurality of axially aligned cylinders form a main pumping chamber, a booster chamber, and a hydraulic chamber, eachhaving a piston therein reciprocated in unisonby a piston rod common to all pistons and cylinders. Main conduit means, connect the main chamber with a source of fluid supply with the output of the main chamber connected to a reverse-osmosis load device. Secondary conduit means connects the booster chamber with a pressurized stream of reject fluid from the load device through a first two-position valve device. Hydraulic conduit means connects the hydraulic cylinder with a pressure compensated hydraulic pump, connected with a hydraulic-reservoir, through a second 2 or stream of fluid under apredetermined pressure for a reverse-osmosis load device wherein a pressurized stream of reject fluid, from the load device, is utilized in driving a piston in a booster cylinder which is supplemented by hydraulic pumping means for driving the piston of a main pump.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the pump connected .with a reverse-osmosis device; and,
DESCRIPTION OF THE PREFERRED EMBODIMENT I Like characters of reference designate like parts in those figures of the drawings in which they occur.
In the drawings:
The reference numeral 10 indicates a reverseosmosis device which fractionates a salts solution, for example brackish water, into a relatively saltfree effluent and a salts-concentrated effluent. The device 10 includes a container 12 having end walls 14 and containing membranes consisting of very fine hollow fibers (85 microns outside diameter), not shown. The general chemical description of these fibers is disclosed in US.
Pat. No. 3,567,632. The fibers are assembled within the container 12 in a manner similar to a shell-and-tube heat exchanger with the fibers representing the tubes and the container 12 forming the shell. The fractionating action is accomplished by subjecting the feed supply to a pressure higher than its osmotic pressure and forcing it into the container 12 through an inlet opening 16 for contact with the semipermeable membrane walls of the fibers wherein the applied pressure drives water, but relatively few salt ions, inwardly through the individual fiber walls leaving a concentrated salts solution. The concentrated salts solution, hereinafter called The above described device 10 is conventional and two-position valve device. Valve control means, operated by the reciprocating piston rod,- at the respectiveend of its travel, shifts the first and second two-position valve devices so that a stream of reject fluid under pressure from the load device cooperates with the hydraulic pump means,"as a pump booster force, for maintaining a predetermined pressure of fluid supplied to the load device.
I The principle object of this invention is to provide a hydraulic pumping system maintaining a constant flow forms no part of the present invention but is included to illustrate the manner in which the feed solution passing through the'device 10 cooperates with the below described pumping system.
The reference numeral 25 indicates the pumping system, as a whole, comprising a plurality of axially aligned cylinders 26, 28, 30 and 32, respectively, provided with end plates 34-36, 38-40, 42-44 and 46 with the end plate 44 common to the cylinders 30 and 32. Diametrically the cylinders 28 and 30 are smaller than the cylinders 26 and 32. The cylinders 26, 28, 30 and 32, respectively, form a master or main pumping chamber 48, a booster chamber 50, a hydraulic pumping chamber 52 and a-hydraulic fluid reservoir 54. The reservoir 54 contains a supply of hydraulic fluid 56 which may be replenished through a filler opening 57. The cylinders 26, 28, 30 and 32 are connected in axially aligned relation by elongated bolts 58, or the like, extending through the respective cylinder end plates. Pistons 60, 62 and 64 are disposed within the respective cylinders 26, 28 and 30. A piston rod 66 extends coaxially through the cylinders 26, 28 and 30 and through the respective end plates 34-36, 38-40 and 42-44 and is coaxially secured to the respective piston 60, 62 and 64. One end portion 68 of the piston rod projects into the reservoir 54 while the other end portion 70 of the piston rod projects beyond the cylinder end plate 34 and has a stop 72 secured thereto. The piston rod is sealed, with the respective end plate through which it projects, as by O-rings, as shown, and similarly the respective piston is provided with O-rings or seals, not shown, for forming a seal with the inner wall surface of the respective cylinders. Each of the cylinder end plates 34-36, 38-40 and 42-44 are provided with combination inlet-outlet ports 74-76, 78-80 and 82-84 communicating with the respective ends of the chambers 48, 50 and 52.
Main conduit means 86 forms a conduit header having conduit end portions 88 and 90 connected with the main chamber inlet-outlet ports 74 and 76, respectively. A pair of double check valves 92 and 94 are respectively interposed in cross conduits connected with the conduits 88 and 90. A supply conduit 95 connects a source of fluid supply, not shown, with the double check valve 92 through a filter F. Another conduit 96 connects the output of the double check valve 94 with a pressurized fluid receiving header 98 connected to the reverse-osmosis container 12 inlet 16 by a tube 100.
Secondary conduit means 102 comprises one conduit 104 connected at one end with the booster chamber inlet-outlet port 80 and connected at its other end with a reject fluid header 106 in turn connected with the reverse-osmosis container 12 outlet or fluid reject discharge port 18. The other conduit 108 of the secondary conduit means is connected at one end with the booster chamber inlet-outlet port 78 with the other end of the conduit 108 discharging reject fluid as waste. A first two-position valve means 110 is interposed in the secondary conduits 104 and 108 for controlling the direction of flow of reject fluid to the respective ends of the booster chamber 50.
Hydraulic pump means 112, comprising a pressure compensated pump P, driven by a motor M, is connected, by hydraulic conduit means 114, with the reservoir 54 and hydraulic pumping chamber 52. The hydraulic conduit means 114 comprises a supply conduit 116 connecting the reservoir 54 outlet 117 to the intake side of the pump P. The hydraulic output side of the pump P is connected by a conduit 118 to the inletoutlet port 84 of the chamber 52. Another tube 120 is connected at one end with the chamber 52 inlet-outlet port 82 and to the fluid reservoir 54 inlet 124 at its other end. A second two-position valve device 122 is interposed in the conduits 118 and 120 to control the direction of flow from the pump P and from the inletoutlet ports of the chamber 52 and return the hydraulic fluid to the reservoir return port 124. An adjustable pressure release or relief valve R is interposed in a bypass conduit 126 connected at its respective ends with the conduits 118 and 120 between the pump P and the two-position valve 122 for the purposes. readily apparent.
Solenoids 128-130 and 132-134 are connected respectively with the two-position valves 110 and 122 with one terminal of each solenoid grounded. A pair of normally open limit switches 136 and 138 are disposed in spaced-apart relation in the path of and at the respective end limits of travel of the piston rod 66 to be contacted and closed by the stop 72 when the piston rod approaches its limit of travel in respective directions. A wire 140 connects a source of electrical energy, not shown, with one terminal of each of the limit switches 136 and 138. A second wire 142 is connected at one end portion with the solenoids 130 and 134 and is connected at its other end in series with the wire 140 through the limit switch 136. Another wire 144 is similarly connected at one end portion with the solenoids 128 and 132 and at its other end in series with the source wire 140 through the limit switch 138.
OPERATION Assuming the pump 25 is operating and the piston rod 66 is moving toward the right, as viewed in F IG. 2, fluid, under pressure in the main cylinder 48 at its end portion between the piston 60 and end plate 34, flows out of the inlet-outlet port 74 through the conduit 88, check valve 94 to the feed header 98 and into the container l2. Reject fluid under proportionate pressure from the reject fluid header 106 flows through the conduit 104, in the direction of the arrows, into the booster chamber 50 through its inlet-outlet port forcing the piston 62 toward the right, as viewed in the drawings, and supplementing the force applied to the main chamber piston 60. The reject fluid in the chamber 50, to the right of the piston 62, is exhausted to waste through the secondary conduit 108 in the direction of the arrows. During this time the pump P is forcing hydraulic fluid 56 at constant pressure through the hydraulic conduit 118 into the hydraulic chamber 52 through its inletoutlet port 84 while hydraulic fluid in the other end of the chamber 52 is returned to the reservoir 54 through the hydraulic conduit 120. The hydraulic pump P pressure output control 145 is either manually set, for a predetermined pressure output of the pump P or is connected, as by tubing, not shown, with the main conduit 96 according to the type of hydraulic pressure compensated pump used. When the piston rod approaches the end of its travel to the right, as viewed in the drawings, the stop 72 closes the limit switch 138 energizing the solenoids 128 and 132 thus simultaneously shifting the two-position valves and 122 so that the direction of flow of fluid to and from the respective chambers 48, 50 and 52 is reversed and continues, thus moving the respective piston toward the left, until the stop 72 contacts and closes the limit switch 136 by movement of the. piston rod 66 toward the left, as viewed in FIG. 2. When the limit switch 136 is closed it energizes the solenoids and 134 thus shifting the two-position valves 110 and 122 to their position at the beginning of this cycle of operation. Obviously the two-position valve devices may be controlled by mechanical means,
such as linkage, not shown, actuated by the piston rod 66 for shifting the two-position valves, if desired. Similarly other type valve control means may be used, such as piston equipped pneumatic or hydraulic valves replacing the limit switches and solenoids, respectively.
Obviously the invention is susceptible to changes or alterations without defeating its practicability, therefore, I do not wish to be confined to the preferred embodiment shown in the drawings and described herein.
I claim: 1. A hydraulic pumping system, comprising:
a plurality of axially aligned cylinders forming a like plurality of pumping chambers each having inletoutlet ports and each having a piston therein;
a piston rod common to all said cylinders and connected with each said piston for reciprocating said pistons in unison;
main conduit means connected for directly receiving the fluid pumped from one of said chambers;
a varying load device having an inlet connected to the main conduit means'whereby a constant fluid pressure is established in the main conduit means,
said load device having an outlet discharging a fluid stream under pressure proportionate to the fluid pressure established in said main conduit means;
second conduit means having a first valve device therein connecting the pressurized fluid stream with a second one of said chambers and for discharging said latter fluid after passing into and out of said second chamber;
hydraulic pump means;
hydraulic conduit means having a second valve device therein connectingsaid hydraulic pump means with a third one of said chambers; and,
valve control means connected with said valve devicesand actuated by said piston rod as it approaches the end of its movement in respective directions for driving the pistons in said second and said third chambers in a reciprocating action.
2. The pumping system according to claim 1 in which said'hydraulic pump means includes:
a pressure compensated hydraulic pump for driving the piston in said third chamber and maintaining the fluid pressure in said main conduit means constant.
3. The pumping system according to claim 2'in which the first and second valve device each comprises:
a two-position valve.
4. The pumping system according to claim 3 in which one end portion of said piston rod projects beyond one end of said axially aligned cylinders and said valve control means includes:
a stop secured to said one end portion of said piston rod; and,
valve shifting means connected with each said twoposition valve and actuated by said stop in response to longitudinal reciprocating movement of said piston rod for shifting said two-position valves in unison with each other.
5. The pumping system according to claim 2 in which said pressure compensated hydraulic pump is provided with a pressure output control responsive to the fluid pressure in said main conduit means.
6. The pumping system according to claim 2 in which said pressure compensated hydraulic pump is provided with a manually adjustable pressure output control.
7. In combination with a reverse-osmosis device in- 5 eluding a container having an inlet opening for receiving a constant pressurized flow of supply fluid and having an outlet opening discharging a constant flow of reject fluid under pressure proportionate to the supply fluid pressure, the improvement comprising:
a plurality of axially aligned cylinders forming a like plurality of pumping chambers each having inletoutlet ports and each having a piston therein;
a piston rod common to all of said cylinders and connected with each said piston for reciprocating said pistons in unison;
main conduit means connected for directly receiving the fluid pumped from one of said chambers;
second conduit means having a first valve device therein connecting the outlet opening of said container with a second one of said chambers and for discharging the reject fluid after passing into and out of said second chamber;
hydraulic pump means;
hydraulic conduit means having a second valve device therein connecting said hydraulic pump means with a third one of said chambers; and,
valve control means connected with said valve devices and actuated by said piston rod as it approaches the end of its movement in respective directions for driving the pistons in said second and third chambers in a reciprocating action.
8. The combination according to claim 7 in which said hydraulic pump means includes:
a pressure compensated pump responsive to the fluid pressure in said main conduit means for driving the piston in said third chamber and maintaining the fluid pressure in said main conduit means constant.
to longitudinal reciprocating movement of said piston rod for shifting said two-position valves in unison with each other.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4054522 *||May 17, 1976||Oct 18, 1977||Harry Pinkerton||Apparatus for exposing a fluid to a negative pressure|
|US4124488 *||Feb 24, 1977||Nov 7, 1978||Ocean Water Limited||Water purification by reverse osmosis|
|US4177146 *||May 5, 1975||Dec 4, 1979||Camirand Wayne M||Methods and apparatus for continuously endowing liquid with mechanical energy by osmosis|
|US4187173 *||Mar 14, 1978||Feb 5, 1980||Keefer Bowie||Reverse osmosis method and apparatus|
|US4304529 *||Sep 26, 1979||Dec 8, 1981||Horst Gerich||Apparatus and method for delivering and metering fluids|
|US4378047 *||Oct 29, 1980||Mar 29, 1983||Elliott Guy R B||Device for in situ recovery of gaseous hydrocarbons and steam|
|US4410429 *||Apr 16, 1981||Oct 18, 1983||Foster-Miller Associates||Linear pocket energy exchange device|
|US4637783 *||Oct 20, 1980||Jan 20, 1987||Sri International||Fluid motor-pumping apparatus and method for energy recovery|
|US4756830 *||May 18, 1987||Jul 12, 1988||Edward Fredkin||Pumping apparatus|
|US4830583 *||Mar 2, 1988||May 16, 1989||Sri International||Fluid motor-pumping apparatus and system|
|US4836924 *||Oct 21, 1987||Jun 6, 1989||Solomon Donald F||Reverse osmosis system and automatic cycling booster pump therefor|
|US4856967 *||Sep 29, 1987||Aug 15, 1989||Jones Stanley C||Hybrid high pressure pump for gas-liquid permeameters|
|US4995793 *||Apr 18, 1989||Feb 26, 1991||Product Research And Development||Reverse osmosis system and automatic cycling booster pump therefor|
|US5000845 *||May 11, 1989||Mar 19, 1991||Product Research And Development||Reverse osmosis system and automatic cycling booster pump therefor|
|US5009777 *||Feb 20, 1990||Apr 23, 1991||Solomon Donald F||Reverse osmosis and hot water system|
|US5013198 *||Nov 30, 1988||May 7, 1991||Schultz Richard A||Air-hydraulic pump with auxiliary pumping means|
|US5154820 *||Jun 13, 1990||Oct 13, 1992||Product Research And Development||Reverse osmosis system with cycled pressure intensifiers|
|US5193988 *||Dec 14, 1990||Mar 16, 1993||Product Research And Development||Reverse osmosis system and automatic cycling booster pump therefor|
|US5244361 *||Apr 22, 1992||Sep 14, 1993||Product Research And Development||Pump for reverse osmosis system|
|US5256279 *||Jul 2, 1992||Oct 26, 1993||Carr-Griff, Inc.||Liquid storage system with unpressurized reservoir engagable with level sensors|
|US5380428 *||Jul 1, 1993||Jan 10, 1995||Product Research & Development||Pump for reverse osmosis system|
|US5500113 *||Oct 13, 1993||Mar 19, 1996||Shurflo Pump Manufacturing Co.||Reverse osmosis water system|
|US6017200 *||Aug 12, 1997||Jan 25, 2000||Science Applications International Corporation||Integrated pumping and/or energy recovery system|
|US6062308 *||Jul 15, 1998||May 16, 2000||Atlantic Richfield Company||Well header for use in frigid environments|
|US6491813 *||Feb 1, 2001||Dec 10, 2002||Schenker Italia S.R.L.||Equipment for desalination of water by reverse osmosis with energy recovery|
|US6558537||Oct 10, 2000||May 6, 2003||Miox Corporation||Portable hydration system|
|US6579451 *||Jun 25, 1999||Jun 17, 2003||Manuel Barreto Avero||Water desalting installation through reverse osmosis with pressurized supply tanks in continuous kinetic cycle|
|US6652741||Jun 14, 2000||Nov 25, 2003||Bernard Marinzet||Piston pump, method and installation for filtering water|
|US6736966||Jul 16, 2001||May 18, 2004||Miox Corporation||Portable water disinfection system|
|US6841076||Mar 18, 2000||Jan 11, 2005||Aloys Wobben||Method and device for desalting water|
|US7005075||Feb 23, 2004||Feb 28, 2006||Miox Corporation||Gas drive electrolytic cell|
|US7008523||Feb 23, 2004||Mar 7, 2006||Miox Corporation||Electrolytic cell for surface and point of use disinfection|
|US7244357||Jan 16, 2004||Jul 17, 2007||Miox Corporation||Pumps for filtration systems|
|US7297268||Jan 16, 2004||Nov 20, 2007||Miox Corporation||Dual head pump driven filtration system|
|US7740749||Feb 13, 2006||Jun 22, 2010||Miox Corporation||Gas drive electrolytic cell|
|US7927082||Dec 5, 2005||Apr 19, 2011||Gth Water Systems, Inc.||Highly efficient durable fluid pump and method|
|US8099958||Sep 29, 2008||Jan 24, 2012||Surrey Aquatechnology Limited||Osmotic energy|
|US8387375 *||Nov 11, 2011||Mar 5, 2013||General Compression, Inc.||Systems and methods for optimizing thermal efficiency of a compressed air energy storage system|
|US8455010||Nov 24, 2009||Jun 4, 2013||Reoxcyn Discoveries Group, Inc||Product and method for producing an immune system supplement and performance enhancer|
|US8522538||Nov 11, 2011||Sep 3, 2013||General Compression, Inc.||Systems and methods for compressing and/or expanding a gas utilizing a bi-directional piston and hydraulic actuator|
|US8663705||Dec 28, 2012||Mar 4, 2014||Reoxcyn Discoveries Group, Inc.||Method and apparatus for producing a stabilized antimicrobial non-toxic electrolyzed saline solution exhibiting potential as a therapeutic|
|US9255336||Dec 28, 2012||Feb 9, 2016||Reoxcyn Discoveries Group, Inc.||Method and apparatus for producing a stabilized antimicrobial non-toxic electrolyzed saline solution exhibiting potential as a therapeutic|
|US9328586 *||May 25, 2010||May 3, 2016||Framo Engineering As||Heat transport dead leg|
|US9387440||Sep 30, 2011||Jul 12, 2016||General Electric Company||Desalination system with energy recovery and related pumps, valves and controller|
|US20040164022 *||Feb 24, 2003||Aug 26, 2004||Solomon Donald F.||Reverse osmosis system|
|US20040173528 *||Jan 16, 2004||Sep 9, 2004||Miox Corporation||Pumps for filtration systems|
|US20040211676 *||Feb 23, 2004||Oct 28, 2004||Miox Corporation||Electrolytic cell for surface and point of use disinfection|
|US20040226873 *||Feb 23, 2004||Nov 18, 2004||Miox Corporation||Gas drive electrolytic cell|
|US20060157342 *||Feb 13, 2006||Jul 20, 2006||Miox Corporation||Gas drive electrolytic cell|
|US20060225420 *||Aug 11, 2004||Oct 12, 2006||Abdulsalam Al-Mayahi||Osmotic energy|
|US20070125710 *||Dec 2, 2005||Jun 7, 2007||Craig Schmitt||Non-electric zero waste reverse osmosis water filtering system|
|US20070128056 *||Dec 5, 2005||Jun 7, 2007||Gth Water Systems, Inc.||Highly efficient durable fluid pump and method|
|US20090091139 *||Sep 29, 2008||Apr 9, 2009||Abdulsalam Al-Mayahi||Osmotic energy|
|US20090159436 *||Dec 19, 2008||Jun 25, 2009||Mikuni Corporation||Electrolyzed water generating and spraying device|
|US20090223897 *||Mar 4, 2008||Sep 10, 2009||Peter Villeneuve||Method for the Rejection of Boron from Seawater in a Reverse Osmosis System|
|US20090283417 *||May 19, 2009||Nov 19, 2009||Miox Corporation||Electrolytic Cell with Gas Driven Pumping|
|US20100037967 *||Aug 14, 2008||Feb 18, 2010||Shun-Tsung Lu||Feeding device for liquid materials|
|US20100086420 *||Apr 12, 2007||Apr 8, 2010||Enrique Del Pozo Polidoro||System for impelling a fluid by recirculation from a low-pressure medium to a high-pressure medium|
|US20120057997 *||Nov 11, 2011||Mar 8, 2012||General Compression, Inc.||Systems and methods for optimizing thermal efficiencey of a compressed air energy storage system|
|US20120152558 *||May 25, 2010||Jun 21, 2012||Framo Engineering As||Heat transport dead leg|
|USRE32144 *||Feb 5, 1982||May 13, 1986||Reverse osmosis method and apparatus|
|USRE33135 *||Aug 10, 1987||Dec 26, 1989||Recovery Engineering||Pump apparatus|
|DE3141033A1 *||Oct 15, 1981||Jun 9, 1982||Stanford Res Inst Int||Fluessigkeitsfoerdersystem mit energierueckgewinnungseinrichtung|
|EP0055981A1 *||Jan 4, 1982||Jul 14, 1982||Mesple D. Josť Luis Ramo||Water desalination system using the reverse osmosis process|
|EP0059275A1 *||Feb 27, 1981||Sep 8, 1982||Seagold Industries Corporation||Reverse osmosis apparatus and method of using integral valve|
|EP0292267A2 *||May 18, 1988||Nov 23, 1988||Edward Fredkin||Pumping apparatus and method|
|WO1997021483A1 *||Dec 12, 1996||Jun 19, 1997||Aloys Wobben||Process for desalinating water and a suitable device|
|WO2000050773A2||Feb 22, 2000||Aug 31, 2000||2 M||Double displacement pump|
|WO2001005490A1 *||Mar 18, 2000||Jan 25, 2001||Aloys Wobben||Method and device for desalting water|
|WO2002055173A1 *||Jan 9, 2002||Jul 18, 2002||Teknowsmartz Innovations Techn||Regenerative, multi-stage, fixed recovery pump for filtration systems|
|WO2007102899A2||Nov 29, 2006||Sep 13, 2007||Gth Water Systems, Inc.||Highly efficient durable fluid pump and method|
|WO2013071134A1 *||Nov 9, 2012||May 16, 2013||General Compression, Inc.||Systems and methods for optimizing thermal efficiency of a compressed air energy storage system|
|WO2014088880A1 *||Nov 26, 2013||Jun 12, 2014||General Electric Company||Pumping system with energy recovery and reverse osmosis system|
|U.S. Classification||210/134, 210/136, 210/321.65, 417/401, 417/377, 417/404, 417/323, 210/137, 210/321.66, 210/500.23|
|International Classification||B01D61/06, F04B9/00, B01D61/02, F04B9/113|
|Cooperative Classification||B01D61/06, B01D2313/246, F04B9/113|
|European Classification||F04B9/113, B01D61/06|