| 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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| 08/30/1990 | DE3943200A1 In-tank fuel reservoir with reservoir fuel level control |
| 08/29/1990 | EP0384767A2 Torque coupling system |
| 08/29/1990 | CN2061221U Large-flow high-lift section type double-inlet sludge pump |
| 08/24/1990 | CA2010798A1 Torque coupling system |
| 08/14/1990 | US4948348 Immersion pump, especially for low-boiling fluids |
| 08/08/1990 | EP0327549B1 Centrifugal pump for hot media |
| 08/07/1990 | CA1272414A1 Vaneless centrifugal pump |
| 08/01/1990 | EP0379792A2 Disposable pump assembly |
| 07/25/1990 | CN2059687U Corrosion-resistant plastics centrifugal pump |
| 07/25/1990 | CN1008931B Integrated centzifugal pump shell body with plastic lining, their pressurized dies and processings |
| 07/11/1990 | EP0377493A2 Reactor coolant pump auxiliary flexible vacuum seal for reactor coolant system vacuum degasification |
| 07/10/1990 | US4940385 Rotary disc pump |
| 07/10/1990 | US4940384 Molten metal pump with filter |
| 07/06/1990 | CA2007290A1 Reactor coolant pump auxiliary flexible vacuum seal for reactor coolant system vacuum degasification |
| 07/03/1990 | US4938662 Mechanical pump equipment |
| 07/03/1990 | US4938660 Pump for viscous fluids |
| 06/27/1990 | CN2058702U Centrifugal perfusion pump |
| 06/27/1990 | CN1043371A Lining cast process for large dredge pump |
| 06/26/1990 | US4936744 Centrifugal pump |
| 06/26/1990 | CA1270696A1 Combined fluidizing and vacuum pump |
| 06/13/1990 | CN1008390B Method and apparatus for reducing wear on impeller and increasing efficiency of centrifugal pump |
| 06/12/1990 | US4932837 Centrifugal pump for liquids |
| 06/06/1990 | CN1042759A Transition duct for centrifugal fan |
| 05/23/1990 | EP0369783A2 Transition duct for centrifugal fan |
| 05/23/1990 | EP0369144A2 Centrifugal pump for pumping molten masses, especially molten explosives |
| 05/16/1990 | EP0368558A2 Hydrodynamic pivoted pad bearing assembly for a reactor coolant pump |
| 05/16/1990 | EP0368530A2 Fluidizing centrifugal pump or impeller for such a pump |
| 05/16/1990 | CN2057234U Split glue spraying pump |
| 05/16/1990 | CN2057233U Asphalt overflow-preventive pumping device |
| 05/16/1990 | CN2057232U Axial flow water pump capable of preventing wear by mud and sand |
| 05/15/1990 | US4925375 Device for automatic circulation in a waste water pump station |
| 05/15/1990 | US4925372 Fuel pump for aircraft turbine engines |
| 05/10/1990 | DE3837365A1 Size reduction device for slurry and waste water pumps |
| 05/08/1990 | US4923369 Slurry pump having increased efficiency and wear characteristics |
| 05/08/1990 | CA1268664A1 Underwater pump |
| 05/03/1990 | DE3837127A1 ZM-pump adapter |
| 05/01/1990 | US4921400 Pump and a method of separating gas by such from a fluid to be pumped |
| 04/24/1990 | US4919343 Anti-flooding sewage grinder pump liquid level control system in separately mounted canister |
| 04/24/1990 | CA1268078A1 Pump or compressor unit |
| 04/17/1990 | US4917577 High speed centrifugal oxygenator |
| 04/03/1990 | US4913563 Hydrodynamic pivoted pad bearing assembly for a reactor coolant pump |
| 03/28/1990 | EP0360204A1 Unit apt to act upon the flow |
| 03/27/1990 | US4911368 Grinder pump |
| 03/27/1990 | CA1267039A1 Reinforced rubber liner for centrifugal pump casings |
| 03/21/1990 | EP0359730A1 A device for automatic circulation in a waste water pump station |
| 03/21/1990 | CN2054846U Mud-rock pump |
| 03/14/1990 | CN2054497U Welding type titanium pump under liquid |
| 03/07/1990 | CN2054096U Submerged pump made of corrosion-proof plastics |
| 02/28/1990 | CN2053686U High efficiency multipassage non-blocking pump |
| 02/27/1990 | US4904159 Pump impeller |
| 02/21/1990 | CN1006927B Vertically outside installed underliquid pump |
| 02/14/1990 | EP0354470A2 Reactor coolant pump having double dam seal with self-contained injection pump mechanism |
| 02/14/1990 | CN2052830U Single-stage, single suction ceutrifugal oil pump |
| 02/13/1990 | US4900335 Centrifugal pump wheel and method of pumping gas containing liquid by means of a centrifugal pump |
| 02/07/1990 | EP0353611A2 Centrifugal pump of the ceramic construction type |
| 01/31/1990 | CN2052069U Totally-enclosed corrosion-resisting centrifugal pump |
| 01/31/1990 | CN2052068U Leak-proof corrosion-resisting centrifugal pump |
| 01/24/1990 | CN2051681U Automatic suction volumetric pump with rubber wheels |
| 01/24/1990 | CN2051680U Energy-saving multistage centrifugal pump |
| 01/16/1990 | US4893986 High-pressure high-temperature coal slurry centrifugal pump and let-down turbine |
| 01/16/1990 | US4893647 In-tank fuel reservoir with reservoir fuel level control |
| 01/11/1990 | DE3823214A1 Centrifugal pump |
| 01/09/1990 | CA1264251A1 Low flow pump |
| 01/02/1990 | US4891169 Transition duct for centrifugal fan |
| 01/02/1990 | CA1264125A1 Method and apparatus for the mixing of liquid or gas into pulp stock |
| 12/28/1989 | WO1989012755A1 Turbine |
| 12/26/1989 | US4889468 Submerged type pump |
| 12/20/1989 | EP0347088A2 Method and apparatus for pumping high consistency medium |
| 12/20/1989 | EP0346677A1 Liquid-displacement machine |
| 12/13/1989 | EP0345916A1 Submersible pump, parts thereof and methods of making the parts |
| 12/13/1989 | EP0345258A1 Centrifugal pump |
| 12/12/1989 | US4886417 Fuel pump and radial-flow impeller therefor |
| 12/06/1989 | CN2048907U Vertical centrifuge sand pump without shaft gland |
| 12/05/1989 | US4884943 Method and apparatus for pumping high-consistency fiber suspension |
| 11/29/1989 | CN1005940B Nuclear reactor coolant pump impeller / shaft assembly |
| 11/28/1989 | US4883406 Transport ventilator |
| 11/28/1989 | US4883403 Impellers for centrifugal pumps |
| 11/28/1989 | US4883202 Liquid pumping system |
| 11/21/1989 | US4882514 Submersible sodium pump |
| 11/08/1989 | EP0340236A1 Improved pump construction. |
| 11/07/1989 | EP0260320A4 Cartridge pump. |
| 10/31/1989 | US4877424 Method and apparatus for separating solids from a solids-gas mixture |
| 10/31/1989 | US4877368 Fluidizing centrifugal pump |
| 10/24/1989 | CA1262422A1 Submersible pump |
| 10/18/1989 | EP0337394A2 Method and apparatus for separating gas with a pump from a medium being pumped |
| 10/17/1989 | US4874575 Multiple discharge cylindrical pump collector |
| 10/10/1989 | US4872809 Slurry pump having increased efficiency and wear characteristics |
| 10/04/1989 | CN2045432U Metal single-stage centrifugal pump with leakless and corrosion-resisting features |
| 09/28/1989 | DE3808598A1 Centrifugal pump for delivering fluids containing solid abrasive particles |
| 09/26/1989 | CA1261678A1 Impeller |
| 08/30/1989 | EP0330387A2 Improved method and apparatus for processing pulp |
| 08/24/1989 | WO1989007715A1 Centrifugal pump |
| 08/23/1989 | EP0328800A1 Filter assembly |
| 08/08/1989 | US4854820 Centrifugal pump for handling liquids carrying solid abrasive particles |
| 08/08/1989 | US4854819 Method and apparatus for pumping fibre suspensions |
| 07/26/1989 | EP0181350B1 Centrifugal slurry low-flow pump casing |
| 07/25/1989 | US4850818 Corrosion-resistant magnet pump |
| 07/18/1989 | US4849159 Coolant-pumping system for a nuclear reactor |
| 07/18/1989 | US4848774 Reactor coolant pump hydrostatic sealing assembly with externally pressurized hydraulic balance chamber |
| 07/11/1989 | US4847600 Son-air detector |