| Patents for F04D 1 - Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (3,447) |
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| 10/02/2003 | US20030185676 Pump diffuser anti-spin device |
| 10/01/2003 | CN1122758C Method for changing water pump property and water pump with optimized configuration |
| 09/18/2003 | WO2003076811A1 Submersible pump impeller design for lifting gaseous fluid |
| 09/18/2003 | WO2003075981A1 Dual inlet mixed-flow blood pump |
| 09/18/2003 | CA2472088A1 Dual inlet mixed-flow blood pump |
| 09/17/2003 | CN2573730Y Leakless vertical multi-stage pump |
| 09/11/2003 | US20030170112 Submersible pump impeller design for lifting gaseous fluid |
| 09/10/2003 | CN2572053Y Vertical multi-section type pump |
| 09/10/2003 | CN1120938C Drainage pump |
| 09/08/2003 | CA2374989A1 Ventricular assist device comprising a dual inlet hybrid flow blood pump |
| 09/04/2003 | WO2003072949A1 Anti-stall tip treatment means for turbo-compressors |
| 09/03/2003 | CN1439809A Multistage segmental centrifugal pump |
| 09/03/2003 | CN1439808A Multistage sectional centrifugal pump with symmetric impeller arrangement |
| 08/28/2003 | WO2003071138A1 Pump using waste tire |
| 08/20/2003 | EP1125063B1 Centrifugal pump with compensator |
| 08/20/2003 | CN1118629C Fluid machinery, flange of fluid machinery and producing method thereof |
| 07/31/2003 | WO2003062646A1 Impeller |
| 07/31/2003 | WO2003062645A1 Multistage pump |
| 07/31/2003 | DE10227426C1 Bladed rotor for compact flow machines has compression and induction side each with own blade set, differing from each other in geometry and number of blades |
| 07/30/2003 | EP1331399A1 Floating pump bearing |
| 07/23/2003 | CN1115486C Miniature resistance bottom valve |
| 07/02/2003 | CN1427923A Locking device for locking stator pack of motor driven pumps |
| 06/19/2003 | US20030111844 Fluid-powered energy conversion device |
| 06/18/2003 | CN2556395Y Portable fire water pump for use in forest |
| 06/18/2003 | CN2556394Y Centrifugal flow high-pressure pump |
| 06/11/2003 | CN1111256C Integral pump |
| 06/04/2003 | CN2554392Y Self-priming vertical multi-stage centrifugal pump |
| 05/28/2003 | CN1109825C High-speed centrifugal pump |
| 05/21/2003 | CN2551784Y Multistage serial integrated water pump |
| 05/21/2003 | CN2551783Y Punching pump |
| 05/20/2003 | US6565321 Vortex attractor |
| 05/14/2003 | CN2550531Y Water pump |
| 05/14/2003 | CN1108501C Centrifugal compressor set for 5 or 8 KW refrigerating system |
| 05/14/2003 | CN1108457C Pump vane |
| 05/08/2003 | WO2003038284A1 Turbo pump |
| 05/07/2003 | EP0879359B1 A centrifugal pump device |
| 05/07/2003 | CN1107807C Slow energy saving water pump |
| 05/01/2003 | WO2003036096A1 Method for optimizing the operation of several compressor units in a natural gas compression station |
| 04/30/2003 | CN2547914Y Vertical single-suction multi-stage centrifugal liquid chlorine pump |
| 04/29/2003 | US6554799 Biological precision screw pump |
| 04/24/2003 | US20030077165 Pitot tube insert |
| 04/23/2003 | CN2546655Y Serial shield pump |
| 04/23/2003 | CN2546654Y Multi-stage high-lift small flow pump |
| 04/23/2003 | CN1106333C Multiple channel system, apparatus and method for transporting particulates material |
| 04/15/2003 | US6547539 Pump assembly with bearing and seal-free reusable impeller for fragile and aggressive fluids |
| 03/26/2003 | CN2541645Y Low noise high efficiency multi-stage pump |
| 03/20/2003 | WO2003023230A1 Improved pitot tube insert |
| 03/20/2003 | WO2002040861A8 Fluid-powered energy conversion device |
| 03/19/2003 | EP1293680A1 Drainage pump |
| 03/12/2003 | CN1401911A Multi-stage variable pressure water supply pump for supply of water in city |
| 02/11/2003 | US6518680 Fluid-powered energy conversion device |
| 02/06/2003 | US20030025334 Fluid-powered energy conversion device |
| 02/05/2003 | EP1280999A1 Locking device for locking the stator pack of motor-driven pumps |
| 02/04/2003 | US6514053 Motor-driven pump with a plurality of impellers |
| 01/30/2003 | WO2002040861A3 Fluid-powered energy conversion device |
| 01/30/2003 | US20030021681 Pump assembly |
| 01/22/2003 | CN1392346A Multiple phase fluid pumping or compressing device with serial vanes |
| 01/02/2003 | EP1268972A1 Pressure boost pump |
| 12/25/2002 | CN2527757Y Punching stainless steel multistage pump |
| 12/19/2002 | US20020192072 Variable flow impeller-type water pump with movable shroud |
| 12/18/2002 | CN1385617A Gravity converting automatic water lift, lift set, and lift group |
| 12/18/2002 | CN1096571C Turbo type fluid machinery |
| 12/05/2002 | WO2002097278A1 Stage housing constructed from multiple metal sheets |
| 12/05/2002 | US20020180216 Fluid-powered energy conversion device |
| 12/05/2002 | DE10126488A1 Stufengehäuse in mehrteiliger Blechbauweise Stage housing in a multi-part sheet metal construction |
| 12/04/2002 | CN2523989Y Multi-stage centrifugal oil pump with axially middle openings |
| 12/04/2002 | CN1383476A Drainage pump for condensated water |
| 11/28/2002 | WO2002095230A1 Electromagnetic rotor pump having bifurcated housing |
| 11/21/2002 | US20020172608 Pump assembly with bearing and seal-free reusable impeller for fragile and aggressive fluids |
| 11/19/2002 | US6481961 Stage for a centrifugal submersible pump |
| 11/13/2002 | CN1094179C 泵叶轮 Pump impeller |
| 11/06/2002 | CN1093920C Cylinder case vortex pump |
| 10/30/2002 | CN1093612C Bearing device and fluid pump having the same |
| 10/30/2002 | CN1093606C Drainage pump |
| 10/29/2002 | US6471468 Compensator |
| 10/15/2002 | CA2083069C Liquid pump |
| 10/09/2002 | EP1247994A2 Centrifugal pump with adjustment of the axial and radial clearances without opening the pump body |
| 10/02/2002 | CN1372082A Turbomachine with radial-flow type compressor propeller |
| 08/28/2002 | CN1089869C Friction turbopump with high output pressure |
| 08/27/2002 | US6439854 Method and pump for impelling water in waters |
| 08/27/2002 | US6439835 Pump shell for multistage metal working pump |
| 08/22/2002 | US20020114693 Turbomachine with radial-flow compressor impeller |
| 08/21/2002 | EP1233190A1 Turbomachine with radial-flow compressor impeller |
| 08/14/2002 | CN1089143C Turbomachinery with variable-angle fluid guiding vanes |
| 08/07/2002 | CN1363020A 离心泵 Centrifugal |
| 07/30/2002 | CA2254187C Pump impeller |
| 07/25/2002 | DE10107807C1 Flow machine with radial compressor wheel, used as a turbosupercharger, has cavity between inner cylinder of spiral casing and casing insertion piece |
| 07/24/2002 | EP1224396A1 Vortex generator |
| 07/10/2002 | EP1012477A4 Bearing and seal-free blood pump |
| 07/03/2002 | EP1219838A2 Guide wheel for centrifugal pumps |
| 06/26/2002 | EP1216359A1 Centrifugal pump |
| 06/26/2002 | EP1003970A4 Improved rotor for blood pump |
| 06/25/2002 | US6409474 Centrifugal pump formed by pressing and welding and its manufacturing process |
| 06/19/2002 | CN2495831Y Fire fighting pump used for building |
| 06/11/2002 | CA2253067C Pump impeller |
| 06/05/2002 | CN1086016C Oil pumping unit |
| 05/29/2002 | CN2493757Y Cylinder type power sealed multi-stage pump |
| 05/23/2002 | WO2002040861A2 Fluid-powered energy conversion device |
| 05/21/2002 | US6390789 Cooling means for the motor of a turbocompressor |
| 05/21/2002 | US6390773 Fluid machinery, a flange for fluid machinery, and a method for manufacturing them |