US3663117A - Aeration pump - Google Patents
Aeration pump Download PDFInfo
- Publication number
- US3663117A US3663117A US3663117DA US3663117A US 3663117 A US3663117 A US 3663117A US 3663117D A US3663117D A US 3663117DA US 3663117 A US3663117 A US 3663117A
- Authority
- US
- United States
- Prior art keywords
- liquid
- impeller
- vanes
- housing
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/20—Activated sludge processes using diffusers
- C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/60—Pump mixers, i.e. mixing within a pump
- B01F25/64—Pump mixers, i.e. mixing within a pump of the centrifugal-pump type, i.e. turbo-mixers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S261/00—Gas and liquid contact apparatus
- Y10S261/75—Flowing liquid aspirates gas
Definitions
- a disc-shaped UNITED STATES PATENTS impeller is confined within a pump housing which includes an 1n1et port ad acent the center of the 1mpeller and an outlet 2,441,708 5/ 1948 Luaces et al ..417/13 rt fo med in a volute chamber which surrounds the outer 2,873,945 2/1959 Kuhn 15 periphery of the impeller.
- the impeller is conventionally 2,938,467 1 960 n rg u mounted on a drive shaft supported by bearings in the housing 3,217,655 1 Sercy Ct al.
- the impeller also includes short 2,720,836 10/ 1955 'f et radially extending auxiliary vanes on an inner side.
- the 1,653,189 12/1 927 p f periphery of the impeller is notched between the vanes to sub- 906332 12/1908 Huquemnm "417/72 stantially the depth of the closed portions of the vanes.
- the present invention concerns a centrifugal pump especially designed for use in aerating liquids. More particularly, the invention concerns a centrifugal pump having a novel impeller and air injection arrangement, as well an improved water seal on the inlet side of the impeller.
- Aeration refers to the dissolution of air in liquid, as opposed to the mere entrainment of air bubbles. Aeration of liquids is particularly desirable in pollution control operations. Thus, water is often aerated to freshen it prior to human usage or to destroy bacteria therein. In other applications, it is common to aerate water to facilitate the removal of oil and other pollutants which may be separated therefrom as surfacescum.
- the impeller of a conventional centrifugal pump comprises a circular disc having radially extending curved vanes thereon and being rotated by a shaft attached to the eye of the disc.
- the impeller is confined within a housing which includes an inlet port located adjacent the impeller eye and an outlet port located in a volute chamber surrounding the outer periphery of the impeller vanes.
- a centrifugal pump having an impeller confined within the usual housing provided with a center inlet port and an outlet port from the volute chamber.
- the impeller includes a plurality of curved, partially closed vanes on the outer side and is notched along its outer periphery between the vanes.
- the inner side of the impeller is provided with auxiliary vanes and includes two separate bearing surfaces rotatably fit with corresponding surfacesof the inner housingto define a uniquearrangement of water seals. Air isadmitted to the housing under a pressure slightly higher than the pump output pressure, at a location near the tips of the impeller vanes where it ishighly agitated to facilitate dissolution.
- FIG. 1 is a side elevation view in cross-section of a centrifugal pump designed in accordance with the invention.
- FIG. 2 is a front elevation view in cross-section of the pump shown in FIG. 1.
- a centrifugal pump comprising a generally circular housing 10 having an inner wall 11 and an outer wall 12 confining an impeller 30 adapted to rotate in a counterclockwise direction as viewed in FIG. 2.
- Wall 12 includes an inlet port 15 located opposite the eye of the impeller.
- Wall 12 is formed with a circular, inner sealing ring or surface 13 and an outer sealing surface 14 oriented substantially perpendicular to the plane of rotation of the impeller.
- Housing 10 further includes a volute chamber 17 generally surrounding the outer portions of the impeller and joining the outer edges of walls 1 l, 12.
- the cross-sectional area of the volute increases along the periphery of the housing in a counterclockwise direction until the volute chamber terminates in an outlet port 18.
- the pump housing further comprises an air inlet port 20 formed in the outer wall 12 near the outer periphery of the impeller immediately to the left of the outlet port 18.
- An air channel 21 communicates with the port 20 and is adapted to be connected to an air supply source 45 for delivery of air to the interior of the housing for a purpose to be explained.
- Impeller 30 includes an inner side 32 having auxiliary vanes 33 thereon, as shown in dotted outline in FIG. 2; and an outer side 34 having a set of main vanes 35 thereon which comprise the working elements of the pump.
- the vanes are, of generally elongate, curved form extending from the eye of the impeller to its outer periphery.
- Vanes 35 include open outer portions 38 and closed inner portions 36 which cooperate to form liquid passages 37 from the pump inlet to the volute 'chamber.
- the closed vane portions include a circularinner seal surface 39 and a similar outer seal surface 40, adapted to rotatably fit with surfaces '13, 14 respectively, of the housing wall to form a unique arrangement of water seals.
- the outer periphery of the impeller is formed with relatively deep, curved notches 42 between the main vanes. As shown best in FIG. 2 the notches extend inwardly substantially the entire length of the open vane portions to define tooth-like segments along the outer periphery of the impeller for a purpose to be explained.
- the pump impeller In operation the pump impeller is rotated so that liquidadmitted to the inlet port is confined between the main vanes and moved outwardly under centrifugal forceand increasing pressure to the volute chamber 17. Since the the velocity of liquid leaving thevanes decreases, the volute pressure increases andthe liquid is expelled from the outlet port at a high outlet pressure. The force of the expelled liquid creates suction at the pump inlet port so that the pump will operate satisfactorily without positive inlet pressure.
- air is selectively admitted from a source 45 through air channel 21 and port 20 to the interior of the housing. As shown, the air is injected near the tips of the vanes and is thoroughly mixed with liquid during an entire revolution of the impeller before being expelled through the outlet port. As best seen from FIG. 2, the movement of the impeller creates circulation patterns in the liquid about the tips of the vanes resulting in extreme agitation of the liquid and air mixture whereby large quantities of air are dissolved.
- centrifugal pump of the invention may be used to dissolve any suitable gas within selected liquids or mixtures of liquids.
- a method of conditioning a liquid by dissolving gas in said liquid comprising the steps of:
- a centrifugal pump for dissolution of gas into a liquid comprising:
- a circular housing having first and second spaced apart walls joined at their outer edges by a volute chamber;
- inlet port means formed in the center of said first wall for admitting liquid to said housing
- outlet port means formed in said volute chamber for exhausting liquid from said housing
- an impeller rotatably supported within said housing comprising a circular plate having an inner eye portion defined thereon, upstanding curved vanes secured to said plate extending between said eye portion and the outer periphery of said plate to define liquid channels between said vanes, and means secured to the upstanding edges of said vanes to cover said channels only within an inner portion of said impeller surrounding said eye portion, said plate having contoured notches formed in the outer periphery thereof between adjacent vanes;
- a centrifugal pump including a rotatable impeller having an eye portion and vanes extending radially from said eye portion, said impeller having notches formed therein between adjacent vanes;
- a housing confining said impeller, said housing having a fluid inlet at the eye portion thereof, and an air injection means therein positioned radially outwardly from said eye portion proximate the path of said notches for injecting air into the path of the portions of said impeller defining said notches.
Abstract
Description
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US468670A | 1970-01-21 | 1970-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3663117A true US3663117A (en) | 1972-05-16 |
Family
ID=21712014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US3663117D Expired - Lifetime US3663117A (en) | 1970-01-21 | 1970-01-21 | Aeration pump |
Country Status (1)
Country | Link |
---|---|
US (1) | US3663117A (en) |
Cited By (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3762411A (en) * | 1971-09-20 | 1973-10-02 | Aqua Fem Inc | Power aerated douche |
US3923289A (en) * | 1971-12-13 | 1975-12-02 | Victor Danberg | Method of mixing solids and liquids on a continuous basis |
US3961859A (en) * | 1975-04-17 | 1976-06-08 | Chandler Evans Inc. | Clutch connected multi-stage impeller pump |
US4115258A (en) * | 1973-01-08 | 1978-09-19 | Kenneth Cecil Smith | Treatment of sewage |
US4155959A (en) * | 1975-10-31 | 1979-05-22 | Albert Blum | Apparatus for the removal of gases, especially air, in fluids |
US4282062A (en) * | 1977-10-27 | 1981-08-04 | Babcock-Brown Boveri Reaktor Gmbh | Procedure and equipment for injecting gas into liquids |
DE3147513A1 (en) * | 1981-12-01 | 1983-06-09 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | RADIAL IMPELLER FOR CENTRIFUGAL PUMPS |
WO1987002907A1 (en) * | 1985-11-18 | 1987-05-21 | Stearns Donald M | Centrifugal oxygenator for treatment of waste water and system |
US4877532A (en) * | 1986-09-04 | 1989-10-31 | Barrett, Haentjens & Company | Centrifugal oxygenator and method for treatment of waste water |
US4907945A (en) * | 1988-05-30 | 1990-03-13 | Siemens Aktiengesellschaft | Side-channel compressor |
US4917577A (en) * | 1989-01-25 | 1990-04-17 | Barrett, Haentjens & Co. | High speed centrifugal oxygenator |
US4981413A (en) * | 1989-04-27 | 1991-01-01 | Ahlstrom Corporation | Pump for and method of separating gas from a fluid to be pumped |
US5240372A (en) * | 1992-06-30 | 1993-08-31 | Krienke Heinz H | Centrifugal pumps and systems utilizing same |
DE4209490A1 (en) * | 1992-03-24 | 1993-09-30 | Licentia Gmbh | Liquid pump esp. circulating pump for rinsing liquid in dishwasher - has pump impeller of plastic and its blades on one side are arranged on closed circular disc and on other side covered with circular ring disc with central opening |
US5350274A (en) * | 1992-07-02 | 1994-09-27 | Siemens Aktiengesellschaft | Self-cleaning side channel machine having at least one impeller rotatably mounted in the housing of the machine |
US5591001A (en) * | 1994-09-06 | 1997-01-07 | Cornell Pump Manufacturing Corporation | Aeration system |
US5605434A (en) * | 1994-09-30 | 1997-02-25 | Ksb Aktiengesellschaft | Impeller having transport elements disposed on a pressure side of a cover disk for a centrifugal pump for dirty liquids |
WO1998046887A1 (en) * | 1997-04-11 | 1998-10-22 | Les Traitements Des Eaux Poseidon Inc. | Centrifugal liquid pump with internal gas injection |
US6036434A (en) * | 1995-10-06 | 2000-03-14 | Roper Holdings, Inc. | Aeration system |
US6095749A (en) * | 1996-10-17 | 2000-08-01 | Voith Hydro, Inc. | Hydraulic turbine for enhancing the level of dissolved gas in water |
US6190123B1 (en) * | 1998-05-25 | 2001-02-20 | Asea Brown Boverti Ag | Centrifugal compressor |
FR2804884A1 (en) * | 2000-02-16 | 2001-08-17 | Roumen Kaltchev | DEVICE FOR DIFFUSION OF MICROBULLS OF A GAS IN A LIQUID |
US20030021690A1 (en) * | 2001-07-13 | 2003-01-30 | Abs Pump Production Ab | Centrifugal pump |
US6524063B1 (en) | 1996-10-17 | 2003-02-25 | Voith Siemens Hydro Power Generartion, Inc. | Hydraulic turbine for enhancing the level of dissolved gas in water |
US20040136826A1 (en) * | 2002-11-14 | 2004-07-15 | Britt Timothy D. | Centrifugal pump with self cooling and flushing features |
EP1633983A1 (en) * | 2003-06-16 | 2006-03-15 | Weir Warman Ltd | Improved pump impeller |
US20060130479A1 (en) * | 2004-12-21 | 2006-06-22 | Holm Christopher E | Turbocharger with blow-by gas injection port |
US20060210394A1 (en) * | 2005-03-17 | 2006-09-21 | Aisin Seiki Kabushiki Kaisha | Fluid pump |
US20070063449A1 (en) * | 2005-09-19 | 2007-03-22 | Ingersoll-Rand Company | Stationary seal ring for a centrifugal compressor |
US20070065276A1 (en) * | 2005-09-19 | 2007-03-22 | Ingersoll-Rand Company | Impeller for a centrifugal compressor |
US20070065277A1 (en) * | 2005-09-19 | 2007-03-22 | Ingersoll-Rand Company | Centrifugal compressor including a seal system |
US20080181762A1 (en) * | 2007-01-30 | 2008-07-31 | Technology Commercialization Corporation | Method and device for reducing axial thrust and radial oscillations and rotary machines using same |
US20080272056A1 (en) * | 2007-05-04 | 2008-11-06 | Bijan Kazem | Method and Apparatus for Separating Impurities from a Liquid Stream by Electrically Generated Gas Bubbles |
US20090010783A1 (en) * | 2005-09-24 | 2009-01-08 | Grundfos Management A/S | Submersible pump unit |
US20100137781A1 (en) * | 2006-03-17 | 2010-06-03 | Jackey Chiou | Bubble-Type Nose Cleaner |
US20100219539A1 (en) * | 2007-05-15 | 2010-09-02 | Daiichitechno Co., Ltd. | Negative ion liquid manufacturing apparatus |
US20130039745A1 (en) * | 2010-05-03 | 2013-02-14 | Alfa Laval Corporate Ab | Centrifugal pump |
US8430968B2 (en) | 2008-01-22 | 2013-04-30 | Hydro Dynamics, Inc. | Method of extracting starches and sugar from biological material using controlled cavitation |
US20160208759A1 (en) * | 2015-01-15 | 2016-07-21 | Honeywell International Inc. | Centrifugal fuel pump with variable pressure control |
US9656187B2 (en) | 2014-11-12 | 2017-05-23 | Honeywell International Inc. | Fuel deoxygenation system contactor-separator |
US9687773B2 (en) | 2014-04-30 | 2017-06-27 | Honeywell International Inc. | Fuel deoxygenation and fuel tank inerting system and method |
US9834315B2 (en) | 2014-12-15 | 2017-12-05 | Honeywell International Inc. | Aircraft fuel deoxygenation system |
US10876535B2 (en) * | 2017-09-15 | 2020-12-29 | Mitsubishi Heavy Industries Compressor Corporation | Compressor |
DE102019218139A1 (en) * | 2019-11-25 | 2021-05-27 | Robert Bosch Gmbh | Turbo machine |
US11181119B2 (en) * | 2018-04-20 | 2021-11-23 | Johnson Electric International AG | Impeller and water pump having the same |
US20230279785A1 (en) * | 2020-08-07 | 2023-09-07 | Concepts Nrec, Llc | Flow Control Structures for Enhanced Performance and Turbomachines Incorporating the Same |
Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
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US906232A (en) * | 1908-07-22 | 1908-12-08 | Gustav Huguenin | Condensing apparatus for steam-turbines. |
US1009908A (en) * | 1911-03-14 | 1911-11-28 | John A Lafore | Vacuum-pump or compressor. |
US1099921A (en) * | 1910-01-10 | 1914-06-16 | Paul A Bancel | Centrifugal pump. |
US1277151A (en) * | 1916-12-30 | 1918-08-27 | C H Wheeler Mfg Co | Condensate and air removing apparatus. |
DE328851C (en) * | 1917-08-10 | 1920-11-08 | Theodor Feuerriegel | Centrifugal pump for high final pressures and temperatures |
US1526596A (en) * | 1922-06-09 | 1925-02-17 | William E Greenawalt | Apparatus for treating liquids with gases |
US1540530A (en) * | 1924-02-16 | 1925-06-02 | Bogdanofffriedman Inc | Centrifugal pump |
US1653189A (en) * | 1923-12-17 | 1927-12-20 | Sullivan Machinery Co | Air-lift pump |
US1682945A (en) * | 1924-08-21 | 1928-09-04 | Edwin M R Weiner | Centrifugal vacuum pump |
FR811589A (en) * | 1936-10-05 | 1937-04-17 | Further training in centrifugal pumps | |
US2441708A (en) * | 1944-02-17 | 1948-05-18 | Chemical Developments Corp | Pump for corrosive fluids |
US2720836A (en) * | 1954-04-16 | 1955-10-18 | Asa E Warren | Air lift pump |
US2873945A (en) * | 1952-11-06 | 1959-02-17 | Garrett Corp | Radial wheel construction |
US2938467A (en) * | 1956-01-16 | 1960-05-31 | Allen Sherman Hoff Pump Compan | Centriseal pump |
GB979431A (en) * | 1960-03-23 | 1965-01-06 | Boelkow Ludwig | Centrifugal pump for liquids |
US3217655A (en) * | 1962-09-04 | 1965-11-16 | Snecma | Centrifugal pump |
US3226940A (en) * | 1963-12-12 | 1966-01-04 | Worthington Corp | Single stage centrifugal compressor refrigeration system |
US3245656A (en) * | 1964-04-06 | 1966-04-12 | Dominion Eng Works Ltd | Automatic supply of sealing fluid for rotary fluid machines |
US3462071A (en) * | 1965-05-04 | 1969-08-19 | Maschf Augsburg Nuernberg Ag | Arrangements for radial flow compressors for supercharging internal combustion engines |
US3506373A (en) * | 1968-02-28 | 1970-04-14 | Trw Inc | Hydrodynamically balanced centrifugal impeller |
-
1970
- 1970-01-21 US US3663117D patent/US3663117A/en not_active Expired - Lifetime
Patent Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US906232A (en) * | 1908-07-22 | 1908-12-08 | Gustav Huguenin | Condensing apparatus for steam-turbines. |
US1099921A (en) * | 1910-01-10 | 1914-06-16 | Paul A Bancel | Centrifugal pump. |
US1009908A (en) * | 1911-03-14 | 1911-11-28 | John A Lafore | Vacuum-pump or compressor. |
US1277151A (en) * | 1916-12-30 | 1918-08-27 | C H Wheeler Mfg Co | Condensate and air removing apparatus. |
DE328851C (en) * | 1917-08-10 | 1920-11-08 | Theodor Feuerriegel | Centrifugal pump for high final pressures and temperatures |
US1526596A (en) * | 1922-06-09 | 1925-02-17 | William E Greenawalt | Apparatus for treating liquids with gases |
US1653189A (en) * | 1923-12-17 | 1927-12-20 | Sullivan Machinery Co | Air-lift pump |
US1540530A (en) * | 1924-02-16 | 1925-06-02 | Bogdanofffriedman Inc | Centrifugal pump |
US1682945A (en) * | 1924-08-21 | 1928-09-04 | Edwin M R Weiner | Centrifugal vacuum pump |
FR811589A (en) * | 1936-10-05 | 1937-04-17 | Further training in centrifugal pumps | |
US2441708A (en) * | 1944-02-17 | 1948-05-18 | Chemical Developments Corp | Pump for corrosive fluids |
US2873945A (en) * | 1952-11-06 | 1959-02-17 | Garrett Corp | Radial wheel construction |
US2720836A (en) * | 1954-04-16 | 1955-10-18 | Asa E Warren | Air lift pump |
US2938467A (en) * | 1956-01-16 | 1960-05-31 | Allen Sherman Hoff Pump Compan | Centriseal pump |
GB979431A (en) * | 1960-03-23 | 1965-01-06 | Boelkow Ludwig | Centrifugal pump for liquids |
US3217655A (en) * | 1962-09-04 | 1965-11-16 | Snecma | Centrifugal pump |
US3226940A (en) * | 1963-12-12 | 1966-01-04 | Worthington Corp | Single stage centrifugal compressor refrigeration system |
US3245656A (en) * | 1964-04-06 | 1966-04-12 | Dominion Eng Works Ltd | Automatic supply of sealing fluid for rotary fluid machines |
US3462071A (en) * | 1965-05-04 | 1969-08-19 | Maschf Augsburg Nuernberg Ag | Arrangements for radial flow compressors for supercharging internal combustion engines |
US3506373A (en) * | 1968-02-28 | 1970-04-14 | Trw Inc | Hydrodynamically balanced centrifugal impeller |
Cited By (66)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3762411A (en) * | 1971-09-20 | 1973-10-02 | Aqua Fem Inc | Power aerated douche |
US3923289A (en) * | 1971-12-13 | 1975-12-02 | Victor Danberg | Method of mixing solids and liquids on a continuous basis |
US4115258A (en) * | 1973-01-08 | 1978-09-19 | Kenneth Cecil Smith | Treatment of sewage |
US3961859A (en) * | 1975-04-17 | 1976-06-08 | Chandler Evans Inc. | Clutch connected multi-stage impeller pump |
US4155959A (en) * | 1975-10-31 | 1979-05-22 | Albert Blum | Apparatus for the removal of gases, especially air, in fluids |
US4242289A (en) * | 1975-10-31 | 1980-12-30 | Albert Blum | Apparatus for the removal of gases, especially air, in fluids |
US4282062A (en) * | 1977-10-27 | 1981-08-04 | Babcock-Brown Boveri Reaktor Gmbh | Procedure and equipment for injecting gas into liquids |
DE3147513A1 (en) * | 1981-12-01 | 1983-06-09 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | RADIAL IMPELLER FOR CENTRIFUGAL PUMPS |
WO1987002907A1 (en) * | 1985-11-18 | 1987-05-21 | Stearns Donald M | Centrifugal oxygenator for treatment of waste water and system |
US4877532A (en) * | 1986-09-04 | 1989-10-31 | Barrett, Haentjens & Company | Centrifugal oxygenator and method for treatment of waste water |
US4907945A (en) * | 1988-05-30 | 1990-03-13 | Siemens Aktiengesellschaft | Side-channel compressor |
US4917577A (en) * | 1989-01-25 | 1990-04-17 | Barrett, Haentjens & Co. | High speed centrifugal oxygenator |
US4981413A (en) * | 1989-04-27 | 1991-01-01 | Ahlstrom Corporation | Pump for and method of separating gas from a fluid to be pumped |
DE4209490A1 (en) * | 1992-03-24 | 1993-09-30 | Licentia Gmbh | Liquid pump esp. circulating pump for rinsing liquid in dishwasher - has pump impeller of plastic and its blades on one side are arranged on closed circular disc and on other side covered with circular ring disc with central opening |
US5240372A (en) * | 1992-06-30 | 1993-08-31 | Krienke Heinz H | Centrifugal pumps and systems utilizing same |
US5350274A (en) * | 1992-07-02 | 1994-09-27 | Siemens Aktiengesellschaft | Self-cleaning side channel machine having at least one impeller rotatably mounted in the housing of the machine |
US5591001A (en) * | 1994-09-06 | 1997-01-07 | Cornell Pump Manufacturing Corporation | Aeration system |
US5605434A (en) * | 1994-09-30 | 1997-02-25 | Ksb Aktiengesellschaft | Impeller having transport elements disposed on a pressure side of a cover disk for a centrifugal pump for dirty liquids |
US6074554A (en) * | 1995-10-06 | 2000-06-13 | Roper Holdings, Inc. | Aeration system |
WO1997013071A1 (en) * | 1995-10-06 | 1997-04-10 | Ray Robert B | Aeration system |
GB2320742A (en) * | 1995-10-06 | 1998-07-01 | Robert B Ray | Aeration system |
GB2320742B (en) * | 1995-10-06 | 1999-11-10 | Robert B Ray | Aeration system |
US6036434A (en) * | 1995-10-06 | 2000-03-14 | Roper Holdings, Inc. | Aeration system |
US6524063B1 (en) | 1996-10-17 | 2003-02-25 | Voith Siemens Hydro Power Generartion, Inc. | Hydraulic turbine for enhancing the level of dissolved gas in water |
US6095749A (en) * | 1996-10-17 | 2000-08-01 | Voith Hydro, Inc. | Hydraulic turbine for enhancing the level of dissolved gas in water |
WO1998046887A1 (en) * | 1997-04-11 | 1998-10-22 | Les Traitements Des Eaux Poseidon Inc. | Centrifugal liquid pump with internal gas injection |
US6190123B1 (en) * | 1998-05-25 | 2001-02-20 | Asea Brown Boverti Ag | Centrifugal compressor |
FR2804884A1 (en) * | 2000-02-16 | 2001-08-17 | Roumen Kaltchev | DEVICE FOR DIFFUSION OF MICROBULLS OF A GAS IN A LIQUID |
WO2001060504A1 (en) * | 2000-02-16 | 2001-08-23 | Roumen Kaltchev | Device for diffusing gas microbubbles in a liquid |
US20030021690A1 (en) * | 2001-07-13 | 2003-01-30 | Abs Pump Production Ab | Centrifugal pump |
US7175384B2 (en) * | 2001-07-13 | 2007-02-13 | Abs Pump Production Ab | Centrifugal pump |
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