| Patents for F04F 1 - Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped (1,650) |
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| 01/31/2002 | WO2002008602A2 Liquid pump and metering apparatus |
| 01/24/2002 | WO2002006677A1 Multi-stage liquid elevator |
| 01/23/2002 | CN1332836A Pulsed combustion device and method using the same |
| 01/17/2002 | WO2001057359A3 Apparatus and method for moving fluid |
| 01/17/2002 | US20020005285 Multi-stage liquid elevator |
| 01/17/2002 | US20020005283 Multi-stage liquid elevator |
| 01/16/2002 | CN2471992Y Pneumatic slurry pump |
| 01/02/2002 | CN2469228Y Soft container with pumping function by using positively pressure by weight |
| 12/26/2001 | CN2467832Y Pressure automatic-control water raiser |
| 12/20/2001 | WO2001096708A1 Reciprocating windmill pumping system |
| 12/20/2001 | DE19708418A1 Hydrodynamic pump for transfer of fluid media |
| 12/13/2001 | WO2001094824A1 Orifice-built-in valve |
| 12/12/2001 | CN2464970Y Long distance compressed gas conveying pump |
| 11/21/2001 | EP1155241A1 Gas displaced chamber lift system |
| 11/07/2001 | CN2458452Y Portable fluid material pneumatic filler |
| 10/31/2001 | DE10020359A1 Pneumatic discharge device for raising sewage or effluent from underground installation, has collection vessel with vertical pipe leading to inlet and stand pipe leading to exit |
| 10/18/2001 | WO2001076991A1 Method for conveying flowable substances |
| 10/11/2001 | WO2001074225A1 Liquid dispenser |
| 10/11/2001 | DE10017241A1 Verfahren zur Förderung von fließfähigen Stoffen Method for conveying fluent materials |
| 10/10/2001 | EP1141629A1 Pulsed combustion device and method |
| 10/04/2001 | US20010025651 Gas flow control device |
| 09/20/2001 | DE10011183A1 Hydro-compressor cascade has lifting line attached to line from last compressor, water raising device, headwater line feeding downward flowing water to user higher than last compressor |
| 08/23/2001 | DE10007307A1 Pumpe mit Dynamischem Ventil Pump with Dynamic valve |
| 08/22/2001 | CN1069953C 气动泵 Pneumatic pumps |
| 08/14/2001 | US6272839 Hydraulic air compressor and biological reactor system and method |
| 08/09/2001 | WO2001057359A2 Apparatus and method for moving fluid |
| 08/09/2001 | US20010012486 Hydraulic delivery device |
| 08/07/2001 | US6269884 Gas displaced chamber lift system with closed loop/multi-stage vents |
| 07/24/2001 | US6264434 Air pressure driven two way fluid evacuation and expulsion system |
| 07/17/2001 | US6260628 Use of static mixing element in connection with flow of gas and liquids through a production tubing |
| 07/12/2001 | US20010007283 Method for boosting hydrocarbon production |
| 06/12/2001 | US6244826 Gaseous piston method for suction and compression in closed chamber gas equipments |
| 05/30/2001 | CN1066514C Method and apparatus for intermittent production of oil using gas-lift plug |
| 05/29/2001 | US6237692 Gas displaced chamber lift system having a double chamber |
| 05/22/2001 | US6234762 Reversible venturi-effect pump |
| 05/22/2001 | US6234761 Apparatus for an air lift and transfer pump |
| 05/08/2001 | US6227816 Hydraulic delivery device |
| 05/01/2001 | US6224345 pressure/vacuum generator |
| 05/01/2001 | US6224344 Vacuum operated pumping system |
| 05/01/2001 | US6224342 Conduit pump system to increase water flow capacity |
| 04/24/2001 | US6220823 Air-operated pump with simplified inlet structure useful in floating-layer separation applications |
| 04/24/2001 | US6220822 Airlift |
| 04/18/2001 | EP1025332A4 Multi-well computerized control of fluid pumping |
| 04/10/2001 | US6213348 System for the pumping of liquid |
| 04/03/2001 | US6209761 Pump with air intake |
| 03/27/2001 | US6206245 Pump with a delivery valve including a ball |
| 03/27/2001 | US6206014 Automated system for rinsing a fluid line of a medical system |
| 03/13/2001 | US6200104 Automatic pneumatic pump system |
| 02/27/2001 | CA2212597C Liquid forced-feed apparatus |
| 02/20/2001 | US6189557 Fuel gas supply for a gas burner |
| 02/15/2001 | WO2001011243A1 Solar powered pump |
| 02/13/2001 | US6186745 Gas pressurized liquid pump with intermediate chamber |
| 02/01/2001 | WO2000065237A3 Gas pressurized liquid pump with intermediate chamber |
| 01/23/2001 | US6176252 Apparatus for supplying liquid in semiconductor manufacturing process |
| 01/03/2001 | EP0925454A4 Reversible venturi-effect pump |
| 01/03/2001 | EP0920593A4 Pump |
| 01/03/2001 | CN1278893A Multi-well computerized control of fluid pumping |
| 01/02/2001 | US6167899 Water transporting device |
| 12/19/2000 | US6162020 Airlift pump apparatus and method |
| 12/12/2000 | US6158509 Method and apparatus for gathering liquid sample using a submersible pump |
| 12/05/2000 | US6155498 Sprayer |
| 11/14/2000 | US6146104 Groundwater recovery system incorporating a combination of pressure and vacuum to accomplish removal of groundwater fluids from a downhole pump |
| 11/14/2000 | CA2158514C Method and apparatus for intermittent production of oil with a mechanical interface |
| 11/02/2000 | WO2000065237A2 Gas pressurized liquid pump with intermediate chamber |
| 10/31/2000 | US6138763 Method for pumping a fluid |
| 10/24/2000 | US6135721 Vacuum operated pumping system |
| 10/12/2000 | WO2000060242A1 Electric-pulse pump-injector |
| 09/27/2000 | CN1268210A Parallel multistage type hot water pump using water evaporation and condensation principle |
| 09/21/2000 | WO2000055507A1 Automatic pneumatic pump |
| 09/14/2000 | DE19909725A1 Arrangement for transporting a liquid has arrangement for increasing pressure and/or temp. in liquid reservoir section to feed liquid to feed section and connected evaporation region |
| 08/31/2000 | DE19909252A1 Liquid medium pumping method involves feeding non-miscible magnetic fluid regions with magnetic fields varied in accordance with program into circuit during transportation of medium |
| 08/17/2000 | WO2000047891A1 Air-assisted water circulating type power generating device |
| 08/09/2000 | EP1025332A2 Multi-well computerized control of fluid pumping |
| 08/01/2000 | US6097778 Gravity driven suction pump system, methods, and apparatus |
| 08/01/2000 | US6095759 Submersible pump having float actuated valve |
| 07/20/2000 | DE4126384C2 Pumpenanordnung zur Förderung von insbesondere heißen und korrosiven Flüssigkeiten Pump assembly called for the promotion of particular and corrosive liquids |
| 07/18/2000 | US6089829 Pump for hot corrosive melts |
| 07/13/2000 | WO2000040898A1 Pulsed combustion device and method |
| 06/28/2000 | EP1014384A2 Gravity driven suction pump system methods, and apparatus |
| 06/20/2000 | US6076541 Dispensing system and method for dispensing an aqueous solution |
| 06/14/2000 | EP1007820A1 Use of static mixing elements in connection with flow of gas and liquids through a production tubing |
| 06/14/2000 | CN1256368A Liquid sucking and storing method and apparatus to utilize an engine to form negative pressure |
| 06/08/2000 | WO2000032939A1 Gas displaced chamber lift system |
| 05/10/2000 | EP0998982A1 Knapsack type sprayer comprising liquid pump and having floating air valve |
| 04/11/2000 | US6048175 Multi-well computerized control of fluid pumping |
| 04/04/2000 | US6045336 Pump and valve for leachate extraction of heavier than water fluids |
| 03/21/2000 | US6039546 Float operated pneumatic pump to separate hydrocarbon from water |
| 02/22/2000 | US6027314 Pneumatically powered submersible fluids pump with casing activator |
| 02/15/2000 | USRE36566 Spoolable coiled tubing mandrel and gas lift valves |
| 02/08/2000 | US6021849 Double acting gas displaced chamber lift system and method |
| 02/02/2000 | CN2361892Y Diesel engine exhaust power suction and pressing pump |
| 01/26/2000 | EP0974402A1 Pump with a ball check valve |
| 01/26/2000 | EP0974401A1 Pump with venting means |
| 01/18/2000 | US6015267 Liquid forced-feed apparatus having a working fluid dispersing device |
| 01/05/2000 | EP0968965A1 System and batch process for biological waste water treatment |
| 12/30/1999 | DE19927400A1 Hydraulic advancing unit, eg for use in vehicles |
| 12/16/1999 | WO1999064742A1 Fluid well pump |
| 11/11/1999 | WO1999057442A1 Parallel multistage type hot water pump using water evaporation and condensation principle |
| 10/26/1999 | US5971715 Pneumatic pump having radial ball check valve array |
| 10/06/1999 | CN2342153Y Suction remover for sediment |