| Patents for F04D 1 - Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (3,447) |
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| 03/08/2000 | EP0983441A1 Freeze tolerant rotating fluid management device |
| 03/08/2000 | CN2367802Y High-lift well-pump |
| 03/08/2000 | CN2367801Y Jet type self-suction centrifugal pump |
| 03/08/2000 | CN2367800Y Vertical single-stage single-suction clear-water pump |
| 03/01/2000 | CN2366589Y Oil pump used specially for sewing machine |
| 02/24/2000 | DE19825186A1 Centrifugal pump with housing rotor and discharge seals rotor from housing by drive shaft seal and via rotating noncontact gap seal on infeed side |
| 02/23/2000 | CN2365428Y Unit construction axial absorption two-stage centrifugal pump |
| 02/23/2000 | CN2365427Y Balancing sheet type small radiating fan |
| 02/23/2000 | CN2365426Y 空调风机 Air-conditioning fan |
| 02/17/2000 | WO2000007912A1 Multiple channel system, apparatus and method for transporting particulate material |
| 02/16/2000 | CN2364252Y Low-noise cylindrical fan |
| 02/16/2000 | CN2364251Y Centrifugal and axial water pump |
| 02/09/2000 | CN2363094Y Descaling water-heating pressure-boosting pump |
| 02/09/2000 | CN2363093Y Automatic water-leading centrifugal pump |
| 02/09/2000 | CN2363092Y Electric pump for machine tool |
| 02/09/2000 | CN1243919A Centrifugal pump shaped by punching and welding and its manufacture method |
| 02/02/2000 | CN2361884Y Centrifugal water pump |
| 01/26/2000 | CN2360642Y High effective verticle multi-stage centrifugal pump |
| 01/26/2000 | CN2360641Y Self-sucking multipurpose centrifugal pump |
| 01/26/2000 | CN2360640Y Miniature soft shaft pump |
| 01/26/2000 | CN2360639Y Verticle easy-to-detatch single-stage centrifugal pump |
| 01/19/2000 | EP0830512B1 Low flow-rate pump |
| 01/19/2000 | CN2359498Y Centrifugal blowing machine of small-flow high-speed multi-stage cascade type |
| 01/12/2000 | CN2358253Y Self-suction centrifugal water pump |
| 01/05/2000 | CN2357158Y Centrifugal pump shaped by punching and welding |
| 12/29/1999 | CN2356167Y Self suction centrifugal pump |
| 12/28/1999 | US6007311 High speed self-lubricated fuel pump with hydrostatic bearings |
| 12/22/1999 | CN2355136Y Electric upside downward water filling pump |
| 12/22/1999 | CN2355135Y Miniature centrifugal pump made by metal plate die stamping and welding processes |
| 12/21/1999 | US6004094 Radially sealed centrifugal pump |
| 12/15/1999 | CN2353939Y Water-colling type centrifugal water pump |
| 12/14/1999 | US6000915 Mechanism for providing motive force and for pumping applications |
| 12/08/1999 | CN2352732Y Miniature two purpose automatic water pump |
| 12/08/1999 | CN2352731Y 离心泵 Centrifugal |
| 12/07/1999 | US5997243 Pitot tube inlet insert |
| 12/01/1999 | CN2351600Y Centrifugal self-exhausting clear water pump |
| 12/01/1999 | CN2351599Y Rubber ball pump |
| 11/30/1999 | US5993153 Open bowl for a vertical turbine pump |
| 11/30/1999 | US5993151 Centrifugal pump device |
| 11/25/1999 | DE19822923A1 Guide device for centrifugal pump |
| 11/24/1999 | EP0959254A1 Radially sealed centrifugal pump |
| 11/24/1999 | CN2350569Y Vertical multistage pump specially adapted for firefighting |
| 11/24/1999 | CN2350568Y Deep well self-priming pump without change of small bore well pipe |
| 11/24/1999 | CN2350567Y High pump head sewage pump |
| 11/24/1999 | CN2350566Y Improved self-suction centrifugal pump |
| 11/17/1999 | CN2349385Y Vertical self-suction pump |
| 11/17/1999 | CN1235249A Bearing device and fluid pump having the same |
| 11/03/1999 | CN2346969Y Fire pump for grand building |
| 11/03/1999 | CN2346968Y Draught fan |
| 11/03/1999 | CN2346967Y Centrifugal pump |
| 11/03/1999 | CN2346966Y Centrifugal-axial flow two-staged pump |
| 11/02/1999 | US5975840 Pitot tube pump having axial-stabilizing construction |
| 10/27/1999 | CN2345746Y Vertical multi-stage centrifugal pump |
| 10/27/1999 | CN2345745Y Water pump for dish-washing machine |
| 10/27/1999 | CN2345744Y Exhaust assembly for agricultural centrifugal pump |
| 10/20/1999 | CN2344586Y Radial pipeline fan |
| 10/20/1999 | CN1045811C Press moulding centrifugal pump and its mfg. method |
| 10/13/1999 | CN2343406Y Dyeing printing pump |
| 10/13/1999 | CN2343393Y Ultra-micro pump |
| 10/13/1999 | CN2343392Y Pipeline pump |
| 10/13/1999 | CN2343391Y Submersible pump |
| 10/13/1999 | CN2343390Y 离心式风机 Centrifugal fans |
| 10/13/1999 | CN2343389Y Multipurpose water pump |
| 10/13/1999 | CN2343388Y Shaftless centrifugal pump |
| 10/13/1999 | CN2343387Y Centrifugal pump |
| 10/06/1999 | EP0947701A1 Multistage centrifugal pump |
| 10/06/1999 | CN2342139Y Water injection pump for oil field ground |
| 10/06/1999 | CN2342138Y Multifunction centrifugal dynamic and stable pressure pump |
| 10/06/1999 | CN2342137Y 粉碎泵 Grinder pumps |
| 10/05/1999 | US5961301 Magnetic-drive assembly for a multistage centrifugal pump |
| 10/05/1999 | US5961283 Drainage pump with noise and vibration reducing features |
| 10/05/1999 | CA2066434C Sheet metal pump casing |
| 09/30/1999 | WO1999048818A1 Method and pump for impelling water in waters |
| 09/30/1999 | CA2326112A1 Method and pump for impelling water in waters |
| 09/29/1999 | CN2340952Y Vertical dual inlet and outlet centrifugal pump |
| 09/29/1999 | CN2340951Y Self sucking vortex centrifugal water pump |
| 09/22/1999 | CN2339793Y Easy-to-dismount type vertical double-suction centrifugal pump |
| 09/15/1999 | CN2338515Y Vertical waste water pump cooled by circulation water |
| 09/14/1999 | US5951262 Mechanism for providing motive force and for pumping applications |
| 09/14/1999 | US5951242 Paper machine having a high pressure fluid slitter with overflow compensation |
| 09/08/1999 | EP0681654B1 Sealless rotodynamic pump |
| 09/07/1999 | US5947680 Turbomachinery with variable-angle fluid guiding vanes |
| 09/02/1999 | WO1999043959A2 Improved thrust bearing for multistage centrifugal pumps |
| 09/02/1999 | DE19905435A1 Immersible pump |
| 09/01/1999 | CN2336116Y Cone basket flat bar resistance filter centrifugal |
| 08/25/1999 | CN2334921Y Centrifugal/axial-flow two-purpose water pump |
| 08/25/1999 | CN2334920Y Horizontal high-temp. centrifugal oil pump |
| 08/25/1999 | CN1226641A High speed centrifugal pump |
| 08/17/1999 | US5938412 Blood pump having rotor with internal bore for fluid flow |
| 08/10/1999 | US5934877 Rotor with logarithmic scaled shape |
| 08/04/1999 | CN2331774Y Corner vertical centrifugal pump |
| 08/03/1999 | CA2229018A1 Pump/separator apparatus for viscous liquids |
| 07/29/1999 | WO1999037923A1 Pitot tube inlet insert |
| 07/28/1999 | CN2330813Y Self-priming booster pump for pipeline |
| 07/27/1999 | US5927939 Turbomachine having variable angle flow guiding device |
| 07/21/1999 | CN2329796Y Farm water pump |
| 07/21/1999 | CN2329795Y Small two-stage high-speed centrifugal chlorine compressor |
| 07/20/1999 | US5924848 Blood pump having radial vanes with enclosed magnetic drive components |
| 07/15/1999 | WO1999027257A3 Stage in a submerged multiple-stage pump |
| 07/14/1999 | CN2328816Y Two end liquid feeding labyrinth screw pump |