| Patents for F04D 7 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (4,105) |
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| 02/24/1999 | EP0897476A1 Hybrid magnetically suspended and rotated centrifugal pumping apparatus and method |
| 02/24/1999 | CN2308745Y Vertical slurry pump |
| 02/23/1999 | CA2133154C Apparatus for aerating and/or anaerobically mixing liquids |
| 02/23/1999 | CA2035533C Method and an apparatus for separatring gas from a suspension containing gas |
| 02/17/1999 | CN2307940Y Pump with teflon coating |
| 02/10/1999 | CN1041999C Readily installed universal sewage grinder pump |
| 02/03/1999 | EP0894981A1 Rotor bearing system for molten metal pumps |
| 02/03/1999 | EP0894161A1 System for feeding a suspension to a pressurized vessel |
| 02/03/1999 | CN2306354Y Mud pump sealing device |
| 01/27/1999 | EP0813655B1 Pump for conveying hot media |
| 01/27/1999 | CN1206074A Wear-resisting anticorrosive efficient pump |
| 01/19/1999 | US5861052 Gas-free re-cycling of backwater drained through a forming fabric in a papermaking process |
| 01/14/1999 | WO1999001663A1 Improved rotor for blood pump |
| 01/13/1999 | EP0889989A1 Method and device at the pumping of a medium |
| 01/13/1999 | CN2303954Y Pump for conveying thick liquid |
| 01/12/1999 | CA2032643C Quenching mechanism of shaft seal for slurry pumps |
| 01/05/1999 | CA2032644C Shaft seal for slurry pumps |
| 01/05/1999 | CA2032641C Shaft seal for slurry pumps |
| 01/03/1999 | CA2242174A1 Rotor bearing system for molten metal pumps |
| 12/23/1998 | EP0823028B1 A safety pumping system |
| 12/23/1998 | CN1202580A Vertical self-priming centrifugal pump |
| 12/16/1998 | CN2300746Y Cantilever type pump with bearing box |
| 12/15/1998 | US5848601 Dishwasher pump having soil collection system |
| 12/15/1998 | CA2102657C Pump housing device |
| 12/02/1998 | EP0880651A1 Rotating machine |
| 12/02/1998 | EP0880631A1 Material outfeeding device for vehicles |
| 12/02/1998 | EP0721546B1 Turbo-machine with reduced attrition |
| 12/02/1998 | CN2299173Y Transport pump arranged with thermal insulating system and ceramic lining |
| 12/01/1998 | US5842833 Gas separation control in a centrifugal pump vacuum pump |
| 12/01/1998 | US5842832 Pump for pumping molten metal having cleaning and repair features |
| 11/26/1998 | WO1998025031A3 Molten metal pumping device |
| 11/05/1998 | WO1998049448A1 A seal for a pump, and a pump comprising the seal |
| 11/05/1998 | CA2282389A1 A seal for a pump, and a pump comprising the seal |
| 10/28/1998 | EP0874162A1 Casing or casing part for a propeller-pump |
| 10/28/1998 | CN1197168A General-purpose vertical non-leakage pump |
| 10/22/1998 | WO1998046887A1 Centrifugal liquid pump with internal gas injection |
| 10/14/1998 | EP0735913B1 Apparatus and process for pumping and separating a mixture of gas and liquid |
| 10/14/1998 | CN1196101A Pump for fibrous pulp suspension with means for separating gas from suspension |
| 10/07/1998 | EP0868944A1 Device for supporting the flow of non-homogeneous fluids |
| 10/07/1998 | CN2293666Y 工程塑料耐腐蚀离心泵 Corrosion-resistant plastic centrifugal |
| 09/29/1998 | US5813833 High capacity, large sphere passing, slurry pump |
| 09/09/1998 | CN2290715Y Self-sucking sprinkling pump |
| 09/09/1998 | CN1192800A Method for controlling function of centrifugal pump and vacuum pump combination, and gas separating centrifugal pump |
| 09/01/1998 | US5800704 Foam flotation protein separatior |
| 08/26/1998 | CN1191201A Axial conveyor and loop reactor containing said axial conveyor |
| 08/25/1998 | US5797724 Pump impeller and centrifugal slurry pump incorporating same |
| 08/19/1998 | CN1190938A Fluid propulsion system for accelerating and directionally controlling a fluid |
| 08/05/1998 | EP0856665A2 Axial conveyor, preferably with aeration element, and bladed reactor provided with such conveyor |
| 08/05/1998 | EP0807210A4 A continuous dynamic mixing system and methods for operating such system |
| 07/29/1998 | CN2286809Y Wear-resisting thick-mud-sand pump |
| 07/28/1998 | US5785501 Liquid pump with degasser and integrated vapor recovery option |
| 07/28/1998 | US5785495 Fiber-repellant centrifugal pump |
| 07/28/1998 | US5785494 Molten metal impeller |
| 07/22/1998 | EP0701528A4 Grooved disk apparatus |
| 07/21/1998 | US5782604 Pump |
| 07/15/1998 | EP0834021A4 Molten metal impeller |
| 07/14/1998 | US5779439 Centrifugal liquid pump with internal gas injection |
| 07/08/1998 | EP0852382A1 Internal pump |
| 06/24/1998 | EP0849007A2 Method and device for the withdrawal of media |
| 06/24/1998 | CN2284870Y Low-speed high-efficiency engineering plastics energy-saving pump |
| 06/24/1998 | CN1185824A Pump for conveying a moist pulp |
| 06/24/1998 | CN1185544A Sealed electric-motor pump |
| 06/23/1998 | US5769603 Submerged Pump |
| 06/17/1998 | CN1184898A Pump and water turbine, and processes for mfg. same |
| 06/16/1998 | CA2168063C Continuous dynamic mixing system and methods for operating such system |
| 06/11/1998 | WO1998025031A2 Molten metal pumping device |
| 06/10/1998 | EP0846866A2 Compressor for gases containing hydrogen sulfide |
| 06/04/1998 | DE19748866A1 Encapsulated electric motor powered pump |
| 05/27/1998 | EP0844399A1 Thermal barrier for primary pump |
| 05/27/1998 | CN1182667A Integral plastic lined worm casing of centrifugal pump and moulding die and method thereof |
| 05/22/1998 | WO1998021480A1 Centrifugal pump |
| 05/22/1998 | CA2268293A1 Centrifugal pump |
| 05/19/1998 | US5752803 High pressure centrifugal slurry pump |
| 04/30/1998 | DE19643729A1 Delivery of inhomogeneous fluids, especially manure |
| 04/28/1998 | US5744004 System for feeding a suspension to a pressurized vessel |
| 04/28/1998 | CA2097648C Molton metal pump with vaned impeller and flow directing pumping chamber |
| 04/22/1998 | EP0695222A4 Readily installed universal sewage grinder pump |
| 04/16/1998 | WO1998015736A1 Molten metal transfer pump |
| 04/15/1998 | EP0725752A4 Transporting and metering particulate material |
| 04/15/1998 | CN2278786Y Corrosion-resistant energy-saving pump |
| 04/15/1998 | CN2278785Y Corrosion-resistant ceramic pump |
| 04/14/1998 | US5738807 Air bubble generating apparatus |
| 04/08/1998 | EP0834021A1 Molten metal impeller |
| 04/01/1998 | EP0832681A1 Apparatus for generating air bubbles in a liquid |
| 03/26/1998 | DE19638080A1 Pump with torus-shaped housing |
| 03/25/1998 | EP0830511A1 Method of controlling the function of a centrifugal pump and vacuum pump combination, and a gas-separating centrifugal pump |
| 03/25/1998 | EP0830285A1 A fluid propulsion system for accelerating and directionally controlling a fluid |
| 03/25/1998 | CN2277000Y Horizontal Ti sucking pump |
| 03/25/1998 | CN2276999Y Ti underwater pump |
| 03/19/1998 | WO1998011347A1 Implantable electric axial-flow blood pump with blood-cooled bearing |
| 03/18/1998 | CN2276575Y Corrosion resistance centrifugal pump |
| 02/25/1998 | EP0762921A4 Dual impeller pump |
| 02/11/1998 | EP0823028A1 A safety pumping system |
| 02/10/1998 | US5716195 Pumps for pumping molten metal |
| 02/05/1998 | WO1998004833A1 Self-priming type centrifugal pump |
| 02/05/1998 | WO1998004372A1 Gas injection pump |
| 02/04/1998 | EP0821616A1 Device for admixing a first fluid into a second fluid |
| 01/28/1998 | EP0820563A2 Pump for conveying a moist pulp |
| 01/27/1998 | US5711789 Apparatus for pumping gas-containing fiber suspensions |
| 01/21/1998 | CN2272953Y External circulation vertical pump for dilute sulfuric acid tank |