| Patents for F04D 1 - Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (3,447) |
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| 10/01/2008 | CN101275570A Rotary case pump of rotor cavity with straight radial blade without impeller |
| 10/01/2008 | CN100422564C Impeller and fuel pump using the same |
| 10/01/2008 | CN100422563C Automatic sucker for gas-liquid separation |
| 09/30/2008 | US7429809 Driving motor, especially for a pump |
| 09/25/2008 | US20080232958 Spiral blower |
| 09/25/2008 | DE102007014019A1 Heat pump used in refrigerators, in air conditioners and in the chemical industry comprises a first circulation for a coolant and a second circulation for the coolant |
| 09/24/2008 | CN201121590Y Electric auxiliary water feeding pump for nuclear power plant |
| 09/18/2008 | DE102007012661A1 Submersible pump unit for use in connection with bath thermostats, has pump component connected on immersion nozzle, where impeller is connected with drive shaft in frame component, and guide wheel is connected with frame component |
| 09/17/2008 | CN100419271C Screw-centrifugal pump |
| 09/10/2008 | CN100417817C Double end compound tooth type labyrinth screw pump |
| 09/03/2008 | CN201110264Y Two-stage tangent pump |
| 09/03/2008 | CN201110263Y Double casing high pressure multi-stage centrifugal pump for hydrogenation device |
| 09/02/2008 | US7419354 Centrifugal pump with screw pump accelerator |
| 09/02/2008 | CA2488464C Rotary and reciprocal well pump system |
| 08/28/2008 | WO2008102530A1 Substance transfer device |
| 08/28/2008 | US20080206040 Anti-Stall Casing Treatment For Turbo Compressors |
| 08/27/2008 | EP1960632A2 End closure device for a turbomachine casing |
| 08/27/2008 | CN201106563Y Horizontal variable flow constant pressure pump |
| 08/27/2008 | CN201106562Y Vertical centrifugal pump |
| 08/27/2008 | CN201106561Y Vertical variable flow constant pressure pump |
| 08/21/2008 | US20080199302 Fuel pump for engine |
| 08/20/2008 | CN201103544Y Flexible axle booster pump |
| 08/13/2008 | CN201100237Y Pressure increase device |
| 08/06/2008 | CN101235823A Centrifugal pump blade wheel-free hollow screw axis |
| 07/31/2008 | WO2008090994A1 Multi-stage high-pressure pump |
| 07/24/2008 | WO2008086575A1 A pump having a stationary helical spiral flange and a slotted impeller shaft rotatable within |
| 07/23/2008 | CN100404873C Parallel series pump |
| 07/23/2008 | CN100404872C Straight serial pump |
| 07/17/2008 | DE202007003888U1 Tauchpumpenaggregat Submersible pump assembly |
| 07/15/2008 | CA2368176C A method and a device for separation of a surface layer of a liquid body |
| 07/09/2008 | CN201083199Y Single-absorption double-stage centrifugal pump |
| 07/09/2008 | CN101216039A Vertical type highly effective energy-saving abrasion-proof pump |
| 07/09/2008 | CN100400891C Pump made of waste tire |
| 07/03/2008 | US20080159847 Centrifugal Pump With Screw Pump Accelerator and Reverse Flow Vane |
| 07/02/2008 | EP1939454A1 Pump unit |
| 06/26/2008 | WO2007087515A3 High flow/dual inducer/high efficiency impeller for liquid applications including molten metal |
| 06/25/2008 | CN201078333Y Single stage double inlet centrifugal pump |
| 06/25/2008 | CN101208519A Waterpump |
| 06/19/2008 | WO2008071592A1 Hydraulic pump |
| 06/18/2008 | CN201074595Y Hydraulic model pump |
| 06/18/2008 | CN100395455C Impeller and multi-stage pump with the impeller |
| 06/17/2008 | CA2210762C Rotary machine with an electromagnetic rotary drive |
| 06/04/2008 | CN101191491A Screw delivery pump |
| 06/03/2008 | CA2422414C Pump diffuser anti-spin device |
| 05/28/2008 | EP1673157B1 Process for the continuous production of emulsions |
| 05/27/2008 | US7377744 Multistage centrifugal pump |
| 05/21/2008 | EP1177047B1 A method and a device for separation of a surface layer of a liquid body |
| 05/21/2008 | EP1175264B1 A separation device |
| 05/20/2008 | CA2477293C Submersible pump impeller design for lifting gaseous fluid |
| 05/01/2008 | US20080101914 Method for predicting surge in compressor |
| 04/30/2008 | CN201053396Y Single-stage single-suction condensation pump |
| 04/30/2008 | CN201053395Y Guide vane type mixed flow pump |
| 04/30/2008 | CA2608538A1 An electrical submersible pump |
| 04/23/2008 | EP1478857B1 Compressor with an anti-stall tip treatment |
| 04/17/2008 | WO2008043527A1 Multistage pump assembly |
| 04/16/2008 | EP1910684A1 Hydraulic pump |
| 04/15/2008 | US7357341 Two stage sewage grinder pump |
| 04/02/2008 | EP1904747A1 Improved impeller arrangement and pump |
| 03/27/2008 | US20080075598 Fan assembly and impeller thereof |
| 03/20/2008 | US20080069706 Centrifugal pump device for a heat-dissipating system |
| 03/05/2008 | CN201031798Y Self cooling down wear resistant non-leakage balanced suction pump |
| 02/28/2008 | DE102006040130A1 Delivery pump for delivery and dosing of fluid materials e.g. chemical, pharmaceutical or cosmetic components, has variable-speed drive and is configured as single-stage centrifugal pump having radial wheel |
| 02/27/2008 | EP1890932A1 Improved jet pumping device |
| 02/27/2008 | CN201027656Y Speed-adjusting main feed pump of energy-saving hydraulic coupler |
| 02/27/2008 | CN201027655Y Reducing multi-stage centrifugal pump |
| 02/27/2008 | CN101131160A Mechanical seal rinsing structure in two-stage single-suction high-lift centrifugal pump |
| 02/20/2008 | CN201025262Y Acentric pump with gradually changed flow channel of leaf wheel |
| 02/13/2008 | EP1886026A1 Water pump |
| 02/13/2008 | CN101122297A Energy-saving type constant pressure fluid conveying machine parallel arrangement |
| 02/07/2008 | WO2008014556A1 Electric pump-motor design |
| 02/06/2008 | CN201016340Y Double-ring type middle multiple-stage centrifugal pump |
| 02/06/2008 | CN101117960A Structure between last level impeller and pump cap cavity in multilevel centrifugation pipe pump |
| 02/06/2008 | CN100366914C Multistage pump, particularly of the immersion type |
| 02/05/2008 | US7326028 High flow/dual inducer/high efficiency impeller for liquid applications including molten metal |
| 01/30/2008 | CN201013664Y Centrifugal pump |
| 01/30/2008 | CN201013604Y Vane pump used for spray irrigation vehicle |
| 01/30/2008 | CN201013603Y Centrifugal pump with eccentric structure |
| 01/30/2008 | CN101115567A Degassing centrifugal apparatus with sensor |
| 01/30/2008 | CN100365289C Multi-stage centrifugal pump capable of self-balancing axial force by impeller |
| 01/30/2008 | CN100365286C Precision casted stainless steel well pump |
| 01/29/2008 | US7322791 Turbine unit and VTG mechanism therefor |
| 01/29/2008 | CA2448772C Attachment of bearing elements by deformation |
| 01/23/2008 | CN100363627C Automatic rotating electric water pump according to correct direction |
| 01/17/2008 | WO2008006934A1 Cooling arrangement for an electrical machine |
| 01/08/2008 | CA2259863C Open bowl for a vertical turbine pump |
| 01/03/2008 | US20080003101 Fan, motor and housing thereof |
| 01/02/2008 | CN200999747Y Overall plastic centrifugal pump |
| 01/02/2008 | CN101096952A Circumferential direction kinetic energy superposing technology of lamination type centrifugal pump |
| 01/02/2008 | CN101096951A Fabrication technology of lamination type centrifugal pump |
| 12/27/2007 | DE102006028597A1 Turbo pump for conveying liquid, has circle-cylindrical rotor rotatably supported on stator axis, which is connected firmly with housing, and liquid exchange realized over flowing and dispersing channels |
| 12/20/2007 | US20070292269 Automatic transmission and production method of impeller hub for automatic transmission |
| 12/19/2007 | CN100356067C Centrifugal pump with switched reluctance motor drive |
| 12/13/2007 | US20070286723 Centrifgal pump |
| 12/13/2007 | DE202006011858U1 Mehrstufige Seitenkanalpumpe mit Gehäusescheiben Multistage side channel pump housing washers |
| 12/12/2007 | CN200989334Y Self-balancing multistage pump |
| 11/28/2007 | CN200982296Y Single-stage single-suction centrifugal pump |
| 11/21/2007 | CN200978839Y Vertical multistage pump |
| 11/21/2007 | CN200978816Y Horizontal multi-stage pump balanced water-returning member |
| 11/21/2007 | CN200978806Y Highly effective double-suction split centrifugal pump with multiple-sealing form and easily for maintaining |
| 11/14/2007 | CN200975360Y Vertical type multi-stage pump with intermediate bearing |