| Patents for F04D 9 - Priming; Preventing vapour lock (1,858) |
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| 03/31/1992 | US5100288 Slurry pump apparatus |
| 03/25/1992 | CN2099861U Automatic drain-away device for mixed flow pump |
| 03/17/1992 | US5096386 Integral liquid ring and regenerative pump |
| 03/12/1992 | DE4038875A1 Fuel pump with valve for motor vehicle IC engine - incorporates vent for airexpulsion from engine space into which fuel enters at commencement ofstroke |
| 02/27/1992 | DE4026717A1 Displacement or piston pump - has booster pump connected to its crankshaft via magnetic or electrodynamic coupling |
| 02/15/1992 | WO1992003659A1 A system for simultaneously degassing and pumping a liquid |
| 02/12/1992 | CN2095952U Self-suction water pump |
| 02/12/1992 | CN2095951U Self-suction automatic water pump |
| 01/29/1992 | CN2094630U Automatic water adding air releasing vlave for pump |
| 01/23/1992 | WO1992001298A1 Bwr series pump recirculation system |
| 01/14/1992 | US5080554 Windscreen washer pump for vehicle |
| 01/09/1992 | WO1992000449A1 Assembly for feeding fuel from the fuel tank of a motor vehicle to its internal combustion engine |
| 01/07/1992 | US5077968 Vaneless contrarotating turbine |
| 01/02/1992 | DE4020520A1 Aggregat zum foerdern von kraftstoff vom vorratstank zur brennkraftmaschine eines kraftfahrzeuges Unit for pumping fuel from the storage tank to the internal combustion engine of a motor vehicle |
| 12/25/1991 | CN2091369U Gas separator open and close self-priming pump |
| 12/18/1991 | CN1015126B Vertical automatic full liquid priming type centrifugal pump |
| 12/16/1991 | CA2040678A1 Slurry pump apparatus and method |
| 12/11/1991 | EP0460597A2 Single impeller centrifugal pump with a peripheral-longitudinal diffuser |
| 12/11/1991 | EP0460399A2 Centrifugal pump and gasboiler including the same |
| 12/11/1991 | CN2090442U 自动水泵 Automatic Pump |
| 11/14/1991 | DE4014567A1 Centrifugal pump |
| 11/05/1991 | CA1291665C Air throttling valve for submerged pump |
| 10/29/1991 | US5061151 Centrifugal pump system with liquid ring priming pump |
| 10/29/1991 | CA1291464C Self-priming liquid ring pump methods and apparatus |
| 10/22/1991 | US5058557 Apparatus for delivery of fuel from a storage tank to an internal combustion engine of a vehicle |
| 09/25/1991 | CN1054815A Self-priming automatic water pump |
| 09/24/1991 | US5051065 Power transmission |
| 09/05/1991 | WO1991013258A1 Self-priming pumping method and device |
| 08/29/1991 | DE4005923A1 Multistage centrifugal pump aggregate - has combination of booster and main pump for offshore work |
| 08/20/1991 | US5040946 Case, particularly for centrifugal radial pumps, and method for manufacturing thereof |
| 07/30/1991 | US5035583 Sewage pump priming system |
| 07/17/1991 | EP0437070A1 Gas separator for submersible pumps |
| 07/10/1991 | CA2027432A1 Recirculating gas separator for electric submersible pumps |
| 07/03/1991 | EP0435485A1 Device incorporating microporous membrane for venting gases from seal assembly of a reactor coolant pump |
| 06/11/1991 | US5022228 Over the shaft fuel pumping system |
| 05/30/1991 | WO1991007592A1 Integral liquid ring and regenerative pump |
| 05/28/1991 | US5019136 Method and apparatus for separating gas with a pump from a medium being pumped |
| 05/21/1991 | US5017086 Hydraulic periphery pumps |
| 05/16/1991 | WO1991006778A1 Regenerative pump and method discharging pressurized fluid therefrom |
| 05/16/1991 | DE4035585A1 Pump system for extracting liq. specimens - has small dia. pumps in series of acid-resistant material with acid-resistant connections |
| 04/23/1991 | US5009575 Vapor lock preventing mechanism in motor-driven fuel pump |
| 04/17/1991 | CN1050758A Multifunctional non-medium self-priming centrifugal pump |
| 04/10/1991 | CN2074833U Hand/electricity water taking device |
| 02/12/1991 | US4992030 Sump draining apparatus |
| 02/06/1991 | EP0411428A2 Windscreen washer pump for vehicle |
| 02/05/1991 | US4990054 Device incorporating micro-porous membrane for venting gases from seal assembly of a reactor coolant pump |
| 02/05/1991 | US4989411 Over the shaft fuel pumping system |
| 01/16/1991 | CN2069496U High lift water pump for deep well |
| 01/09/1991 | EP0406787A2 Case, particularly for centrifugal radial pumps, and method for manufacturing thereof |
| 01/09/1991 | CN2069042U Mixed-flow pump having contraprops |
| 01/01/1991 | US4981413 Pump for and method of separating gas from a fluid to be pumped |
| 01/01/1991 | US4981175 Recirculating gas separator for electric submersible pumps |
| 12/12/1990 | EP0401670A2 Self-priming centrifugal pump |
| 12/11/1990 | CA1277543C Ejector for air evacuation in medium consistency pulp pumping |
| 12/11/1990 | CA1277542C Pulp centrifugal pump |
| 11/28/1990 | CN2066517U External mixture type double-step self-sucking centrifugal pump |
| 11/22/1990 | EP0398005A2 Pump |
| 11/14/1990 | EP0397041A2 Rotary hydraulic pump |
| 10/31/1990 | EP0395236A1 Pump for separating gas from a fluid to be pumped |
| 10/30/1990 | US4966534 Sump draining apparatus |
| 10/17/1990 | CN1010047B Automatic starting device using perfusion transfer pump system |
| 10/10/1990 | EP0391288A2 Pumping apparatus |
| 09/05/1990 | CN2061621U Energy-saving self-suction means for baseless valve of centrifugal pump |
| 08/08/1990 | CN2060186U Evacuation device |
| 07/26/1990 | DE4000341A1 Fuel pump immersed in fuel tank - makes use of damping chamber to suppress vapour flow noise |
| 07/25/1990 | CN2059688U Self-suction centrifugal pump by vacuum priming |
| 07/25/1990 | CN1044152A Self-suspension leakage-proof centrifugal pump without having bottom valve |
| 06/28/1990 | DE3842349A1 Non self-priming liquid pump having a bleeding (venting) stage |
| 06/26/1990 | CA1270696A1 Combined fluidizing and vacuum pump |
| 06/19/1990 | US4934914 Portable motor pump |
| 06/06/1990 | CN2057971U Double function miniature automatic water pump |
| 05/29/1990 | US4929155 In a swimming pool |
| 05/23/1990 | CN2057473U 自动家用水泵 Automatic household pumps |
| 05/15/1990 | US4925372 Fuel pump for aircraft turbine engines |
| 05/09/1990 | CN2056946U Self-suspension centrifugal pump without leakage and bottom valve |
| 05/01/1990 | US4921400 Pump and a method of separating gas by such from a fluid to be pumped |
| 04/04/1990 | EP0361329A1 Self-priming jet pump with built-in ejector |
| 04/04/1990 | EP0361328A1 Self-priming jet pump with an axial diffuser |
| 04/03/1990 | US4913620 Centrifugal water pump |
| 03/28/1990 | CN1007370B Method and device for keeping vacuum in suction duct of water pump |
| 02/21/1990 | CN2053263U Non-bottom valve device for centrifugal pump |
| 02/20/1990 | US4901413 Method and apparatus for establishing multi-stage gas separation upstream of a submersible pump |
| 01/23/1990 | CA1264602A1 Hose air purging, pump antidepriming method and apparatus |
| 01/03/1990 | CN1038500A Self-suction apparatus using pump liquid-delivery system |
| 01/02/1990 | CA1264125A1 Method and apparatus for the mixing of liquid or gas into pulp stock |
| 12/26/1989 | US4889468 Submerged type pump |
| 12/12/1989 | US4886530 Single stage pump and separator for two phase gas and liquid mixtures |
| 11/29/1989 | CN2048525U Self suction universal pump without valve and medium |
| 11/02/1989 | DE3813654A1 Circulation pump |
| 10/31/1989 | US4877377 Rotary pump system |
| 10/18/1989 | EP0337394A2 Method and apparatus for separating gas with a pump from a medium being pumped |
| 10/12/1989 | DE3810950A1 Degassing device |
| 09/21/1989 | DE3807450A1 Pump device |
| 08/02/1989 | CN1034414A Subatmospheric extracting-unloading tank for liquid |
| 07/05/1989 | EP0323384A2 Centrifugal pump |
| 07/04/1989 | US4844691 Centrifugal liquid pump with cavitation surge suppression |
| 07/04/1989 | US4844687 Selfpriming centrifugal pump |
| 07/04/1989 | US4844621 Fuel pump with passage for attenuating noise generated by impeller |
| 06/27/1989 | US4842725 Assembly for making up untreated water according to the principle of reverse osmosis |
| 06/14/1989 | EP0320061A2 Pump device for low-viscosity liquids |