| Patents for F04D 17 - Radial-flow pumps specially adapted for elastic fluids, e.g. centrifugal pumps; Helico-centrifugal pumps specially adapted for elastic fluids (4,320) |
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| 01/06/1993 | CN2126525Y High effective centrifugal compressor |
| 12/30/1992 | EP0520376A1 Apparatus for taking and delivering a constant and predetermined quantity of a liquid |
| 12/30/1992 | EP0217847B1 Pump or compressor unit |
| 12/23/1992 | EP0518953A1 Multiple-choke apparatus for transporting and metering particulate material |
| 12/23/1992 | CN1067296A Mixed flow blower and its inspection equipment of impeller |
| 12/22/1992 | US5173021 Compressors |
| 12/16/1992 | CN2125034U Centrifugal air-blower |
| 12/02/1992 | CN2123632U Ternary centrifugal double wind square housing air machine for air conditioner |
| 11/24/1992 | US5165849 Centrifugal compressor |
| 11/24/1992 | US5165846 Substantially noiseless fan for cooling motors |
| 11/19/1992 | EP0513384A1 Apparatus for treating air with discs in multilayer structure |
| 11/10/1992 | US5161939 Air compression system |
| 10/14/1992 | CN2118846U Water shower cool wind blower |
| 10/14/1992 | CN2118845U Transverse flow double direction air exhausting fan |
| 10/13/1992 | US5154743 Grease extractor |
| 10/13/1992 | US5154571 Geared turbocompressor |
| 10/09/1992 | CA2039932A1 Flexible energy transport to multiple fans |
| 10/07/1992 | CN2118189U Tooth type barring apparatus |
| 09/30/1992 | EP0505360A1 Construction for the displacement of fluids |
| 09/16/1992 | WO1992016751A1 Multi-layer disk fan with blades |
| 09/16/1992 | CA2082949A1 Multi-stacked circular plate fan provided with blades |
| 09/10/1992 | DE4206972A1 Multi-stage vacuum pump - contains several rotors on several shafts |
| 08/27/1992 | DE4129357A1 Method of increasing power of aircraft jet engine - involves installing additional fan in rear part of engine |
| 08/27/1992 | DE4105300A1 Fan for circulating or hot air cooker - has motor fixed outside closable cooking compartment with driven shaft led through passage opening in baking oven wall into microwave compartment |
| 08/12/1992 | CN1017823B Rotary compressor |
| 08/06/1992 | WO1992013196A1 Rotary pump |
| 08/05/1992 | CN2112022U High pressure, large air flow and low noise energy-saving fan |
| 08/05/1992 | CN1017741B New structure of centrifugal fun for inner efficiency increasing |
| 07/29/1992 | CN1063148A A structure of speeding material |
| 07/23/1992 | CA2049480A1 Low profile ventilation fan |
| 07/22/1992 | CN1062959A Method for prolonging fan's life |
| 07/08/1992 | EP0493428A1 Pump or compressor unit. |
| 07/07/1992 | US5127798 Air mixer |
| 07/07/1992 | CA1304730C High efficiency transonic mixed-flow compressor method and apparatus |
| 07/01/1992 | EP0492770A1 Fan |
| 06/23/1992 | US5123811 Supersonic centrifugal compressor |
| 06/10/1992 | EP0489672A1 Double flow ventilation unit, particularly for a technical compartment |
| 06/06/1992 | CA2031614A1 Turbaxidine fan |
| 05/29/1992 | WO1992008895A1 Gerotor pumps |
| 05/29/1992 | CA2095133A1 Gerotor pumps |
| 05/28/1992 | WO1992009355A1 Method of treating air with discs in multilayer structure |
| 05/28/1992 | CA2073869A1 Method of treating air with discs in multilayer structure |
| 05/20/1992 | EP0486164A1 Gerotor pumps |
| 04/08/1992 | EP0473779A4 Fan |
| 04/02/1992 | DE4030817A1 Centrifugal supercharger for vehicle IC-engine - has two compressor rotors, each with up and down stream stators, with rotor vanes spiralling outwards in flow direction |
| 04/01/1992 | CN1059959A 离心式压缩机 Centrifugal compressors |
| 03/18/1992 | EP0474929A1 Laminar flow fans |
| 03/11/1992 | EP0473779A1 Fan |
| 03/10/1992 | US5094586 Air conditioner employing cross-flow fan |
| 03/04/1992 | EP0244487B1 Cross-flow cooling fan device |
| 03/04/1992 | CN2097913U Vacuum bleeding gun |
| 02/25/1992 | US5090880 Scroll compressor with discharge valves |
| 02/19/1992 | EP0471089A1 Device for generating fluid flow and method of manufacture thereof |
| 02/12/1992 | EP0470517A1 Radial fan with axial casing |
| 02/12/1992 | EP0458880A4 Centrifugal fan with airfoil vanes in annular volute envelope |
| 02/12/1992 | CN1015489B Multistage centrifugal compressor |
| 02/12/1992 | CN1015488B Fan of cylindrical rotor with multiple-blades |
| 02/04/1992 | US5085561 Gas removal pump for liquid |
| 01/29/1992 | EP0468676A1 Compressors |
| 01/09/1992 | DE4121995A1 Aircraft turbo-propulsion unit - uses second and third stages of turbine to drive rotors of tangential fan |
| 01/02/1992 | DE4020236A1 Radial-flow fan within air suction duct |
| 01/01/1992 | CN2091974U High-pressure centrifugal fan |
| 12/04/1991 | EP0458880A1 Centrifugal fan with airfoil vanes in annular volute envelope |
| 12/04/1991 | CN1056737A Fan that can be coupled |
| 11/20/1991 | CN2089084U Water-mill and-pump dual purpose machine |
| 11/05/1991 | US5062766 Turbo compressor |
| 10/30/1991 | EP0246325B1 Cross-flow cooling fan device |
| 10/30/1991 | CN2087705U High-temperature resistant water-wheel blower for iron-smelting furnace |
| 10/23/1991 | EP0452964A1 Grease extractor |
| 10/16/1991 | CN2086812U Exhausting and blowing fan running in any direction |
| 10/15/1991 | US5056987 Cross flow fan system |
| 10/09/1991 | EP0450272A2 Radial fan with an internal spiral |
| 10/09/1991 | CN2086331U No-vane centrifugal pump |
| 09/25/1991 | CN2085433U Defoamer |
| 09/24/1991 | US5051041 Multiple-choke apparatus for transporting and metering particulate material |
| 09/18/1991 | EP0446900A1 Mixed-flow compressor |
| 09/10/1991 | US5046480 Compression furnace |
| 09/06/1991 | WO1991013820A1 Multiple-choke apparatus for transporting and metering particulate material |
| 09/06/1991 | CA2075808A1 Multiple-choke apparatus for transporting and metering particulate material |
| 09/04/1991 | CN1013795B Centrifugal compressor |
| 09/03/1991 | WO1991013257A1 Device for generating fluid flow and method of manufacture thereof |
| 08/21/1991 | CN1013609B Cylindrical fan of multiblade |
| 08/20/1991 | US5040949 Two stage dry primary pump |
| 08/14/1991 | EP0440902A1 Transmission and centrifugal compressor |
| 08/09/1991 | WO1991012512A1 Gas sampling device with improved mixed flow fan |
| 07/31/1991 | CN1053477A 旋转压缩机 Rotary compressor |
| 07/10/1991 | EP0435987A1 Radial-flow fan unit fitted inside an air-intake duct |
| 07/03/1991 | CN2080109U Vacuum night-soil suction machine for night-soil transport truck |
| 06/19/1991 | EP0433042A2 Degasifying liquid pump |
| 06/04/1991 | US5020971 Rotatable assembly |
| 05/29/1991 | CN1012698B Device for extending performance of radial flow compressor |
| 05/28/1991 | US5018395 Gas sampling device with improved mixed flow fan |
| 05/02/1991 | WO1991005956A1 Fan |
| 04/10/1991 | EP0420902A1 Method and apparatus for processing fluids |
| 04/04/1991 | WO1991004418A1 Construction for the displacement of fluids |
| 03/27/1991 | CN1012152B Centrifugal pressure expanding propeller |
| 03/19/1991 | WO1991004417A1 Pump or compressor unit |
| 03/19/1991 | CA2066672A1 Pump or compressor unit |
| 02/21/1991 | WO1991002163A1 Fan with electric motor |
| 02/21/1991 | DE4023263A1 Heat exchanger with cross-flow fan - has alignment of dividing wall in form of tongue |