| Patents for F04D 1 - Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (3,447) |
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| 12/09/1992 | CN2124327U Internal leakage prevention centrifugal pump |
| 12/02/1992 | CN2123628U Carriage double-stage self-sucking centrifugal spraying car pump |
| 12/02/1992 | CN2123627U Two-purpose machine with water pump and grind |
| 12/01/1992 | US5167418 Grit protector |
| 11/18/1992 | CN2122249U Balance multi-stage centrifugal pump |
| 11/18/1992 | CN2122248U Improved mixed flow centrifugal pump |
| 11/12/1992 | DE4205105A1 Centrifugal wind driven pump for raising water - has ascending tube supported by roller and sliding bearings |
| 11/04/1992 | CN1018943B Single-suction opposed multi-stage centrifugal submersible pump |
| 10/21/1992 | CN1065511A Double-channel industrial pump with non-rotating impellers |
| 10/14/1992 | CN2118841U Micro self suction pipe pump |
| 10/08/1992 | DE4110833A1 Multi-stage boiler feed pump - has pot-shaped housing and uses cylinder to house impellers and guide elements |
| 10/07/1992 | CN2118183U Flow adjustable centrifugal oil pamp |
| 10/07/1992 | CN2118182U Flow adjustable centrifugal water cleaning pump |
| 10/05/1992 | WO1992017720A1 Grit protector |
| 09/22/1992 | CA2038827A1 High efficiency centrifugal pump, having a high efficiency closed or open impeller, pump having so said equilibrium and equalizer chambers |
| 09/17/1992 | WO1992015787A1 Pitot pump with improved rotor cover |
| 09/16/1992 | CN2116106U New vertical tubular multistage centrifugal pump |
| 09/09/1992 | CN2115411U Multi-purpose centrifugal pump capable of using as asynchronous motor |
| 09/08/1992 | US5145314 Low drag pitot pump and method of operating same |
| 08/19/1992 | CN2113362U Solvent circulating pump |
| 08/19/1992 | CN2113361U Centrifugal pump |
| 08/18/1992 | US5139391 Rotary machine with non-positive displacement usable as a pump, compressor, propulsor, generator or drive turbine |
| 08/06/1992 | WO1992013196A1 Rotary pump |
| 08/05/1992 | CN2112020U Ays-type single-stage, double-suck two ends supporting centrifugal oil pump |
| 08/05/1992 | CN1063340A Spiral boosting centrifugal pump |
| 08/04/1992 | US5135353 Variable pressure pitot pump with reduced heating of pumped fluid |
| 07/29/1992 | CN2111386U Miniature suction pump |
| 07/29/1992 | CN1063148A A structure of speeding material |
| 07/29/1992 | CN1063147A Vaneless centrifugal pump |
| 07/28/1992 | US5133639 Bearing arrangement for centrifugal pump |
| 07/23/1992 | WO1992012349A1 Centrifugal pump |
| 07/14/1992 | CA1304986C Centrifugal pump bearing arrangement |
| 07/08/1992 | EP0494007A1 Single throughflow turbopump with booster |
| 07/08/1992 | EP0494006A1 Turbopump with bleed flow booster pump |
| 07/08/1992 | EP0493428A1 Pump or compressor unit. |
| 07/01/1992 | EP0492606A2 Interstage casing for a pump made of sheet metal |
| 07/01/1992 | EP0492604A2 Interstage casing for a pump made of sheet metal |
| 07/01/1992 | EP0492575A1 Interstage casing for a pump made of sheet metal and method of manufacturing the same |
| 06/24/1992 | EP0491130A1 Cooling water pump for use on the housing of an internal combustion engine |
| 06/23/1992 | US5123810 Power transmission |
| 06/23/1992 | CA1303937C Percutaneous blood pump with mixed flow output |
| 06/17/1992 | EP0490773A1 Multistage pump especially intended for pumping a multiphase fluid |
| 06/17/1992 | CN2107546U Mechanical centrifugal all-speed regulator for fuel injection pump |
| 06/17/1992 | CN2107545U High delivery lift swirl pump |
| 06/09/1992 | CA1302829C Single-stage axial flow blood pump |
| 06/03/1992 | CN2106248U Centrifugal water pump |
| 05/13/1992 | CN2104329U Ays type two-level double-sucking oil centrifugal pump |
| 04/29/1992 | EP0482146A1 Apparatus and method for producing a high-pressure fluid used for fluid-jet cutting |
| 04/22/1992 | CN2102388U Double suction centrifugal water pump |
| 04/21/1992 | US5106263 Centrifugal pump with high efficiency impeller |
| 04/15/1992 | EP0157859B1 Anti-thrombogenic blood pump |
| 03/31/1992 | US5100295 Impeller pumps |
| 03/25/1992 | EP0345258A4 Centrifugal pump |
| 03/24/1992 | US5098255 VAriable geometry pitot pump |
| 03/18/1992 | EP0474929A1 Laminar flow fans |
| 03/04/1992 | CN2097912U Corrosion-resisting pump |
| 02/26/1992 | CN2097296U Centrifugal pump for irrigating and spraying |
| 02/19/1992 | EP0471089A1 Device for generating fluid flow and method of manufacture thereof |
| 02/12/1992 | CN1015489B Multistage centrifugal compressor |
| 01/28/1992 | US5084189 Method and apparatus for separating fluids having different specific gravities |
| 01/15/1992 | EP0466350A2 Multi-stage centrifugal pumps |
| 01/15/1992 | CN2093250U 空心流体泵 Hollow fluid pump |
| 01/14/1992 | US5080554 Windscreen washer pump for vehicle |
| 01/03/1992 | WO1992000440A1 Rotary disc pump |
| 12/26/1991 | WO1991018209A3 Liquid pump |
| 12/25/1991 | CN2091369U Gas separator open and close self-priming pump |
| 12/12/1991 | WO1991019105A1 Deflection accelerated mass propulser conveyance gravity override craft |
| 12/10/1991 | US5071317 Centrifugal pump having a unitary one-piece diffusion casing and a unitary one piece turbine impeller unit |
| 12/05/1991 | CA2018234A1 Deflection accellerated mass propulser conveyance gravity override craft |
| 11/28/1991 | WO1991018209A2 Liquid pump |
| 11/27/1991 | CN1056557A Differential pressure piston type balance unit of axial forces |
| 11/27/1991 | CN1014922B Screw recoil pump |
| 11/14/1991 | WO1991017341A1 Apparatus and method for producing a high-pressure fluid used for fluid-jet cutting |
| 10/30/1991 | EP0454529A1 Vertical centrifugal pump module |
| 10/23/1991 | CN2087252U Helico-centrifugal pump |
| 10/17/1991 | DE4012041A1 High pressure centrifugal pump for abrasive slurries - has outer cover of high strength ductile material mounted adjacent to pump housing |
| 10/16/1991 | CN1055413A Single-suction opposed high-lift submersible pump |
| 10/09/1991 | CN2086327U Double-culvert industrial pump with no-rotary centrifugal impeller |
| 10/09/1991 | CN2086316U Spiral tube turbine pump |
| 09/29/1991 | CA2159650A1 Toric pump |
| 09/25/1991 | CN1054833A Intensifying screen for neutron photography |
| 09/24/1991 | US5051007 Lubrication of a centrifugal pump bearing |
| 09/19/1991 | DE4008267A1 Nozzle water pump system - involves combustion chamber, gas emission nozzle and water suction pipe formed as unit |
| 09/17/1991 | US5049134 Sealless heart pump |
| 09/04/1991 | EP0445046A1 Rotary screw pump, motor-pump, reservoir and machine equipped with such a pump |
| 09/04/1991 | CN2084114U 离心泵 Centrifugal |
| 09/03/1991 | WO1991013257A1 Device for generating fluid flow and method of manufacture thereof |
| 08/29/1991 | DE4005923A1 Multistage centrifugal pump aggregate - has combination of booster and main pump for offshore work |
| 08/29/1991 | CA2036984A1 Screw-type rotary dump, motor dump, container and apparatus equipped with said pump |
| 08/20/1991 | US5040946 Case, particularly for centrifugal radial pumps, and method for manufacturing thereof |
| 07/31/1991 | CN2081904U Chemical centrifugal pump with multi-stage separation |
| 07/31/1991 | CN2081903U Single-phase self-sucking miniature water pump with high delivery lift |
| 07/10/1991 | CN1052929A Xinhua super high effective pump |
| 05/16/1991 | DE4035585A1 Pump system for extracting liq. specimens - has small dia. pumps in series of acid-resistant material with acid-resistant connections |
| 05/08/1991 | EP0425613A1 Double-acting pump, in particular for windscreen wiper systems in motor vehicles. |
| 04/23/1991 | US5009085 Heat pumps |
| 04/16/1991 | US5007798 Centrifugal pump |
| 04/10/1991 | EP0420902A1 Method and apparatus for processing fluids |
| 03/20/1991 | CN1050079A Centrifugal pump housing constructed of sheet metal |
| 03/20/1991 | CN1012099B 离心泵 Centrifugal |