| Patents for F04D 1 - Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (3,447) |
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| 04/29/1997 | US5624226 Underground drainage facility, vertical-shaft multi-stage adjustable vane pump, and method of running drainage pump |
| 04/02/1997 | EP0766007A1 High-pressure multistage pump |
| 04/01/1997 | US5616013 Full-circumferential flow pump |
| 04/01/1997 | US5615996 Method for prediction of the performance of a centrifugal pump with a thrust balance mechanism |
| 03/25/1997 | US5613845 Circulating pump with a sub-impeller |
| 03/20/1997 | DE19534061A1 Centrifugal pump operating without lubrication |
| 03/12/1997 | EP0761981A2 Turbomachinery with variable-angle flow guiding vanes |
| 03/12/1997 | EP0619001B1 Centrifugal pump with adaptor for various valves |
| 03/12/1997 | CN2249320Y Self-suction centrifugal pump |
| 03/12/1997 | CN2249319Y High-flow double entry pump |
| 03/09/1997 | CA2184882A1 Turbomachinery with variable-angle flow guiding vanes |
| 03/06/1997 | WO1997008461A1 Regenerative pump |
| 03/05/1997 | EP0760428A1 Drainage pump |
| 03/05/1997 | CN1144305A Drainage pump |
| 03/05/1997 | CN1034191C Multipurpose asynchronous electrical motor centrifugal pump |
| 02/26/1997 | CN2248257Y Blade type pump |
| 02/25/1997 | US5605439 Drainage pump |
| 02/12/1997 | CN2247245Y Axle open type double-suction centrifugal pump |
| 01/30/1997 | WO1997003291A1 A rotor |
| 01/29/1997 | EP0756141A2 Heat pumps |
| 01/22/1997 | CN1140807A Centripetal reciprocating electric and hand-operated two-purpose pump |
| 01/15/1997 | CN1140239A Pump having improved flow passage |
| 01/01/1997 | CN2244109Y Electromechanical integrated clean water pump |
| 01/01/1997 | CN1139184A Circulating pump with sub-impeller |
| 12/27/1996 | EP0579629B1 Grit protector |
| 12/25/1996 | CN1138670A Press moulding centrifugal pump and its mfg. method |
| 12/19/1996 | WO1996041082A1 Low flow-rate pump |
| 12/18/1996 | EP0662196B1 Sectional-casing-design rotary pump |
| 12/03/1996 | US5580214 Multiphase fluid treatment |
| 11/26/1996 | US5578012 Medical fluid pump |
| 11/26/1996 | US5577881 High performance turbomolecular vacuum pumps |
| 11/19/1996 | US5575615 Multiphase fluid treatment |
| 11/06/1996 | CN1135253A Pump with a number of distinct pumping stages for pumping several liquids |
| 10/31/1996 | WO1996034205A1 Medical fluid pump |
| 10/23/1996 | CN2238332Y Single-stage single-suction minisize centrifugal pump |
| 10/23/1996 | CN2238331Y Submersible pump |
| 10/22/1996 | US5567312 Pressure and recirculating pump for concentrating a solution |
| 10/17/1996 | DE19513962A1 Centrifugal pump with impeller in casing for water economy in power plants, etc. |
| 10/16/1996 | CN1133402A Regenerative pump |
| 10/10/1996 | WO1996031934A1 Rotary machine with an electromagnetic rotary drive |
| 10/10/1996 | WO1996031438A1 Process and device for conveying liquids or liquids mixed with gaseous and/or solids materials |
| 10/10/1996 | DE19513333A1 Verfahren und Einrichtung zum Fördern von Flüssigkeiten oder von mit gasförmigen und/oder mit festen Stoffen versetzten Flüssigkeiten Method and apparatus for conveying liquids or gaseous and / or mixed with solids liquids |
| 10/09/1996 | CN2237135Y Vertical single stage hot water circular centrifugal pump |
| 10/09/1996 | CN2237134Y Centrifugal water pump |
| 10/09/1996 | CN2237133Y Direct connection single stage pump |
| 10/09/1996 | CN1132828A Turbomachinery having veriable angle flow guiding device |
| 10/02/1996 | CN2236563Y Self sucking water pump |
| 10/02/1996 | CN2236562Y Underwater pump |
| 09/25/1996 | CN2236033Y Centrifugal pump structure |
| 08/28/1996 | EP0728262A1 Multistage centrifugal pump with canned magnetic bearing |
| 08/27/1996 | US5549451 Device for moving fluid |
| 08/27/1996 | US5549450 Centrifugal pump of the sectional-casing design |
| 08/21/1996 | CN2233473Y Barrel-type centrifugal pump |
| 08/14/1996 | EP0726397A1 Pump having an improved flow passage |
| 08/07/1996 | CN2232498Y Efficiency energy-saving binary pump centrifugal impeller |
| 07/31/1996 | CN2232093Y Combined self-priming pump |
| 07/23/1996 | CA1338464C Non-positive rotary displacements machine for use as a pump, compressor, propulsor, generator or turbine |
| 07/17/1996 | CN2231329Y Self suction energy saving water pump |
| 07/17/1996 | CN2231328Y Centrifugal water pump rack |
| 07/11/1996 | DE19500280A1 Multistage, centrifugal, immersion pump and motor combination |
| 07/03/1996 | EP0719944A2 Turbomachinery having a variable angle flow guiding device |
| 07/03/1996 | EP0719941A1 Double-suction pump |
| 07/03/1996 | EP0719940A1 Full circumferential flow pump |
| 07/02/1996 | US5531564 Centrifugal pump |
| 06/29/1996 | CA2166249A1 Turbomachinery having variable angle flow guiding device |
| 06/27/1996 | DE4445956A1 Pump for self lubrication roller bearings of turbomachinery |
| 06/26/1996 | EP0718501A1 Multicellular electric centrifugal pump |
| 06/25/1996 | US5529464 Cryogenic turbopump |
| 06/20/1996 | WO1996018817A1 Impeller |
| 06/19/1996 | EP0717195A2 Pump casing made of sheet metal |
| 06/19/1996 | CN1124825A Directional changeover pump |
| 06/12/1996 | CN2228992Y Built-in high head electric submergible pump |
| 06/05/1996 | CN2228666Y Electric heating constant temp. cabinet |
| 06/04/1996 | US5522701 Vertical barrel pump |
| 05/30/1996 | DE4442142A1 Circulation pump for aggressive and erosive mediums |
| 05/29/1996 | EP0713976A1 Full-circumferential flow pump |
| 05/29/1996 | CN2228149Y Constant speed helical force pump |
| 05/28/1996 | US5519995 For generating a force acting on a vertically movable piston rod |
| 05/22/1996 | CN2227766Y Pressure water valve |
| 05/15/1996 | EP0711230A1 Nautical propulsion device |
| 05/08/1996 | EP0537146B1 Rotary disc pump |
| 05/01/1996 | CN2226164Y Disintegrating type centrifugal pump |
| 03/12/1996 | US5498125 High performance turbomolecular vacuum pumps |
| 03/05/1996 | US5496150 Field-serviceable solids-handling vertical turbine pump |
| 02/27/1996 | US5494403 Full-circumferential flow pump |
| 02/22/1996 | WO1996005098A1 Hydrojet |
| 02/15/1996 | DE4428748A1 Hydro=jet propulsion system for boat |
| 02/13/1996 | US5490761 High performance turbomolecular vacuum pumps |
| 01/30/1996 | US5487644 Pump having a single or a plurality of helical blades |
| 01/30/1996 | US5487621 Large-depth underground drainage facility and method of running same |
| 01/23/1996 | US5486089 Directional changeover pump |
| 01/18/1996 | DE4423149A1 Pump esp. torque flow pump with one or more stages |
| 01/17/1996 | EP0692075A1 Sheet-metal-construction pump stage |
| 01/10/1996 | CN1114720A Canned motor pump |
| 01/09/1996 | US5482430 High performance turbomolecular vacuum pumps |
| 12/20/1995 | CN2215611Y Centrifugal petroleum Conveying pump for oil field |
| 12/13/1995 | CN2215039Y Two-stage single-suction cantilever centrifugal oil pump |
| 12/12/1995 | CA2006667C Radial flow fluid pressure module |
| 12/06/1995 | EP0612378B1 Electrohydraulic machine |
| 11/30/1995 | DE4418152A1 Centrifugal fluid delivery pump |