| Patents for F04D 1 - Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (3,447) |
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| 04/24/2002 | CN2487894Y Single suction multi-stage centrifugal pump possessing vane wheels with back blades |
| 04/24/2002 | CN2487892Y Fan blade rotary disc structure for submersible motor |
| 04/10/2002 | CN1082627C Centrifugal pump shaped by punching and welding and its mfg. method |
| 04/09/2002 | US6368056 Stage in a submerged multiple-stage pump |
| 04/02/2002 | US6364059 Lubricating system, preferably for refrigerating machinery and comprising a pitot tube pump |
| 03/27/2002 | EP1190177A2 Centrifugal pump |
| 03/26/2002 | US6361272 Centrifugal submersible pump |
| 03/26/2002 | US6361270 Centrifugal pump for a gas turbine engine |
| 03/13/2002 | CN2481879Y Multi-stage pump |
| 03/13/2002 | CN2481878Y General high-efficiency pump for cold water and hot water |
| 03/13/2002 | CN1080839C Method for increasing pumping efficiency and reducing specific gravity |
| 02/06/2002 | EP1178214A1 Centrifugal Pump |
| 02/06/2002 | EP1178212A2 Water cooled centrifugal pump |
| 02/06/2002 | EP1177047A1 A method and a device for separation of a surface layer of a liquid body |
| 02/06/2002 | CN1334407A High-speed centrifugal pump |
| 02/06/2002 | CN1078935C Oilless lubricating energy-saving pump |
| 02/05/2002 | US6343913 Hydraulic turbomachine |
| 01/30/2002 | EP1175264A1 A separation device |
| 01/25/2002 | CA2329577A1 Gas and liquid pump |
| 01/24/2002 | DE10033402A1 Rotary pump has impeller wheel in two-part chamber with part with stop on which second part is supported so distance between two chamber parts is defined by supporting joint |
| 01/16/2002 | CN2471976Y Multifunctional self sucking centrifugal pump with casing integrated with body |
| 01/16/2002 | CN2471975Y Composite impeller rotor centrifugal pump |
| 01/02/2002 | EP1152963A4 Multiple channel system, apparatus and method for transporting particulate material |
| 12/27/2001 | WO2001098667A1 Drainage pump |
| 12/26/2001 | CN1328218A 泵装置 Pump device |
| 12/20/2001 | WO2001059303A3 Centrifugal pump |
| 12/19/2001 | EP1164296A2 Multistage pump |
| 12/19/2001 | CN2466388Y Low-speed energy-saving water pump |
| 12/19/2001 | CN1327128A Condensated water lifting pump |
| 12/05/2001 | CN1075877C Pump having improved flow passage |
| 11/28/2001 | CN2462110Y Multi-stage centrifugal water pump |
| 11/21/2001 | CN2460754Y Electric water absorption pump |
| 11/21/2001 | CN2460753Y Single-stage, single absorption centrifugal pump |
| 11/21/2001 | CN1322903A Miniature resistance bottom valve |
| 11/15/2001 | US20010040032 Surface pump assembly |
| 11/14/2001 | EP1152963A1 Multiple channel system, apparatus and method for transporting particulate material |
| 11/08/2001 | WO2001083996A1 Locking device for locking the stator pack of motor-driven pumps |
| 11/08/2001 | DE10021353A1 Seal for divided housings consists of cord inserted into groove on surface being sealed, with fatter ends, and energy accumulator springs |
| 11/07/2001 | CN1074511C Turbomachinery having variable angle flow guiding device |
| 10/31/2001 | EP0823026B1 Medical fluid pump |
| 10/31/2001 | CN2457370Y Multiple stage centrifugal pump |
| 10/31/2001 | CN1074091C Impelling apparatus |
| 10/30/2001 | US6309174 Thrust bearing for multistage centrifugal pumps |
| 10/24/2001 | EP1147318A1 Power driven device with centrifugal fluid circulation, such as a motor pump or a motor compressor |
| 10/24/2001 | CN2455947Y 涡流叶轮泵 Vortex impeller pump |
| 10/11/2001 | WO2001075264A1 Pressure boost pump |
| 10/10/2001 | CN2453164Y Multiple system circulation pump |
| 10/10/2001 | CN2453163Y Vertical rotary shaft pump |
| 10/10/2001 | CN1072766C Liquified gas supply device |
| 10/03/2001 | CN2451768Y Self-priming pump |
| 10/03/2001 | CN2451767Y Divided-flow vane pump |
| 10/03/2001 | CN2451766Y Whole-lift multi-stage centrifugal pump |
| 10/03/2001 | CN2451765Y Low-noise pipeline pump |
| 10/03/2001 | CN2451764Y Flexible rotor displacement pump |
| 10/03/2001 | CN1315618A Maze-type screw pump |
| 09/19/2001 | CN2448955Y Drop type gravity water lift |
| 09/19/2001 | CN1313473A Integral pump |
| 09/07/2001 | WO2001065119A1 Sinking multistage centrifugal pump |
| 09/05/2001 | CN1311749A Multiple channel system, apparatus and method for transporting particulates material |
| 08/29/2001 | CN2445115Y Direct-coupling single-stage double-entry centrifugal pump |
| 08/22/2001 | EP1126176A2 Motor driven double suction pump |
| 08/22/2001 | EP1125063A1 Compensator |
| 08/22/2001 | CN2444072Y Multi-stage pump with multi-outlet |
| 08/16/2001 | WO2001059303A2 Centrifugal pump |
| 08/16/2001 | US20010014290 Motor-driven pump with a plurality of impellers |
| 08/15/2001 | CN2443173Y Non-leakage self-priming centrifugal pump |
| 08/15/2001 | CN1308189A Electric pump with several impeller |
| 08/09/2001 | WO2000042323A3 Water handling means |
| 07/31/2001 | US6267554 Cooling water pump |
| 07/25/2001 | CN1068936C Drainage pump |
| 07/04/2001 | CN2437876Y Vertical two-stage single-suction serial and parallel centrifugal pump |
| 06/27/2001 | CN2436692Y Pump structure capable of pumping water and gas |
| 06/13/2001 | CN2434451Y Ease-to-repair vertical multi-stage centrifugal pump |
| 06/13/2001 | CN2434450Y Sucking separation seawater pump |
| 06/07/2001 | DE19956965A1 Verfahren zum Betreiben einer Kälteanlage sowie Kälteanlage A method of operating a refrigeration system and refrigeration plant |
| 06/06/2001 | EP0819330B1 Rotary machine with an electromagnetic rotary drive |
| 06/06/2001 | CN1298064A 混合式流体泵 Hybrid fluid pump |
| 05/31/2001 | WO2001038117A1 Method for operating a refrigeration system and a refrigeration system |
| 05/23/2001 | EP0920592A4 Pump shaft sealing system |
| 05/23/2001 | EP0907829A4 A movable inlet gas barrier for a free surface liquid scoop |
| 05/23/2001 | CN1296131A Slow-speed energy-saving water pump |
| 05/16/2001 | CN1295536A Method and pump for impelling water in waters |
| 05/10/2001 | WO2001033084A1 Vortex generator |
| 05/10/2001 | CA2389346A1 Vortex generator |
| 05/09/2001 | CN2429658Y Eccentric pump with improved structure |
| 05/08/2001 | US6227802 Multistage centrifugal pump |
| 05/02/2001 | CN1065325C High-speed centrifugal pump |
| 04/24/2001 | US6220832 Centrifugal pump and centrifugal pump system |
| 04/10/2001 | US6213289 Multiple channel system, apparatus and method for transporting particulate material |
| 04/04/2001 | CN1064114C Canned motor pump |
| 04/03/2001 | US6210116 High efficiency pump impeller |
| 03/28/2001 | EP1087145A2 Centrifugal pump |
| 03/28/2001 | CN2425214Y Multi-stage symmetical centrifugal pump |
| 03/27/2001 | US6206659 Magnetically driven rotor for blood pump |
| 03/21/2001 | EP1085212A2 High-pressure centrifugal pump |
| 03/21/2001 | EP0847498B1 Regenerative pump |
| 03/14/2001 | CN1063256C 叶轮 Impeller |
| 03/08/2001 | WO2001016491A1 Centrifugal pump |
| 03/07/2001 | CN2422470Y Labyrinth helicoidal pump |
| 03/07/2001 | CN2422469Y Heat unload sealing centrifugal pump |