Patents
Sitemap › F04 - Positive-displacement machines for liquids; Pumps for liquids or elastic fluids › F04F - Pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped; Siphons › F04F 1 - Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
Patents for F04F 1 - Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped (1,650)
09/1999
09/22/1999CN1229457A Reversible venturi-effect pump
09/15/1999CN1228828A Pump
09/01/1999CN2336122Y Pneumatic water pump
08/1999
08/31/1999US5944490 Pneumatically operated submersible pump with float control
08/31/1999CA2157797C Groundwater recovery system
08/25/1999EP0937192A1 Groundwater recovery system
08/25/1999EP0749534A4 Engine coolant extractor/injector with double shut-off coupling
08/24/1999US5941691 Overcenter mechanism for a pressure powered pump
08/17/1999US5939330 Repetitively testing liquid samples; for monitoring radioactive contamination around nuclear reactors
08/17/1999US5938409 Gas powered fluid pump with exhaust assist valve
08/17/1999US5938408 Magnetically controlled liquid transfer system
07/1999
07/21/1999CN2329801Y Internal mixed self-sucking pipeline pump
07/20/1999US5924308 Cryogenic air separation
07/07/1999EP0927826A1 Liquid pumping system
06/1999
06/30/1999EP0925454A1 Reversible venturi-effect pump
06/24/1999WO1999015756A3 Multi-well computerized control of fluid pumping
06/16/1999CN2324324Y Liquid pump
06/09/1999EP0920593A1 Pump
06/02/1999EP0919329A1 Liquid dispensing system and method
04/1999
04/27/1999US5897295 Timer controlled pneumatic water pump
04/01/1999WO1999015756A2 Multi-well computerized control of fluid pumping
04/01/1999CA2304775A1 Multi-well computerized control of fluid pumping
03/1999
03/24/1999EP0804362A4 Satellite fueling system and method therefor
03/11/1999WO1999011905A1 Use of static mixing elements in connection with flow of gas and liquids through a production tubing
03/03/1999CN1209413A Pump distributor
02/1999
02/03/1999EP0894538A2 Pump dispenser
02/02/1999US5865086 Thermo-hydro-dynamic system
01/1999
01/29/1999CA2243915A1 Pump dispenser
01/28/1999WO1999004166A1 Pumping apparatus for pumping liquids from wells and method for supplying the pumping apparatus with a driving fluid
01/20/1999CN2304781Y Vacuum liquid filling machine
01/07/1999EP0646224B1 Valve assembly and pump including said valve assembly
01/05/1999CA2086089C A method and device for producing compressed air and a wataer pumping device using the compressed air
12/1998
12/23/1998CN1202953A Pump for hot, corrosive melts
12/09/1998CN1201503A Air lift tpype power generating and water purifying apparatus
11/1998
11/24/1998US5839617 Pump dispenser
11/24/1998US5839509 Method and apparatus for gathering liquid sample using a submersible pump
11/19/1998WO1998052034A1 Thermal expansion pump for pulse-free liquid flow
11/17/1998US5836745 Fluid recovery apparatus and method using a motive force
11/03/1998US5830128 Liquid feed device for intracavitary examination instrument
11/03/1998CA2144901C Spoolable coiled tubing mandrel and gas lift valves
10/1998
10/08/1998CA2202111A1 Gas powered heating system
09/1998
09/23/1998EP0866293A1 Downflow reboiler-condenser with vapor lift pumping
09/15/1998US5806598 Apparatus and method for removing fluids from underground wells
09/09/1998EP0862695A1 Pump for hot, corrosive melts
09/02/1998EP0861980A2 Fluidic pump making use of hydrodynamic supply and charging
08/1998
08/18/1998US5794695 Method and apparatus for gathering and preparing liquid samples for analysis
08/12/1998CN1190156A 气动泵 Pneumatic pumps
07/1998
07/30/1998WO1998032950A1 Method for pumping a fluid
07/30/1998CA2250101A1 Method for pumping a fluid
07/21/1998US5782261 Coiled tubing sidepocket gas lift mandrel system
07/14/1998US5778922 Useful for dispensing hydraulic fluids
06/1998
06/25/1998WO1998027338A1 Pump with an electrolytic membrane powered by an explosive mixture of hydrogen and oxygen
06/24/1998CN1185555A Liquid pressure supply device
06/10/1998EP0846511A1 Pump for transferring molten lead
05/1998
05/20/1998EP0623084B1 Process and arrangement for draining a liquid residue from the bottom of a tank
05/14/1998WO1998020232A1 Groundwater recovery system
05/13/1998EP0841486A2 Method and device for pumping a fluid
05/12/1998US5749711 Automatic pneumatic pump including a tank with inlet and outlet and a pump connected to the inlet
05/06/1998EP0839708A2 Process and arrangement for draining a liquid residue from the bottom of a tank
03/1998
03/12/1998WO1998010194A1 Reversible venturi-effect pump
03/12/1998CA2265499A1 Reversible venturi-effect pump
03/05/1998WO1998009083A1 Pump
02/1998
02/18/1998EP0824206A2 Liquid forced-feed apparatus
02/11/1998CN1173158A Satellite fueling system and method therefor
02/10/1998US5716196 Pumping method and device with sequential jets
02/05/1998DE19631519A1 Solar pump with liquid working piston and simplified collector
01/1998
01/21/1998EP0626892B1 Pump apparatus for pumping melt metal
01/15/1998WO1998001676A1 Air lift type power generating and water purifying apparatus
01/02/1998DE19717045A1 Water pump for contaminated water
12/1997
12/17/1997EP0636228B1 Compressing combustible gas flowing through a conduit
12/11/1997DE19723041A1 Steam pressure pump for pumping water
12/10/1997EP0689647B1 Pressurisation/partial vacuum pump for delivering predetermined amounts of a product
12/03/1997EP0613526B1 Preloaded over-center valve actuating mechanism
11/1997
11/06/1997WO1997041356A1 Dredging pump for surface waters
11/06/1997DE19617216A1 Förderpumpe für Wasser aus Oberflächengewässern Pump for water from surface water
11/05/1997EP0804362A1 Satellite fueling system and method therefor
10/1997
10/16/1997WO1997038226A1 Apparatus and method for removing fluids from underground wells
10/08/1997CN1036089C Pneumatic liquid pump
09/1997
09/30/1997US5671813 Method and apparatus for intermittent production of oil with a mechanical interface
09/25/1997WO1997035243A1 Hydraulic device and system
09/03/1997EP0792834A1 Pneumatic conveying and/or metering system for tank installations
09/02/1997US5662460 Downhole pneumatic pump with variable bouyant actuator
08/1997
08/26/1997US5660530 Pump system for biasing seals of a centrifugal pump
07/1997
07/08/1997CA2030869C Vacuum pump control apparatus for an evacuating type waste water collecting system
06/1997
06/24/1997US5641272 Enhanced lever mechanism for controllerless pneumatic pump
06/24/1997US5641271 Float operated pump including diaphragm valve assembly with bleed passage
06/11/1997EP0646224A4 Valve assembly and pump including said valve assembly.
05/1997
05/29/1997WO1997019270A1 Pump for hot, corrosive melts
05/29/1997CA2237789A1 Pump for hot, corrosive melts
05/22/1997DE19543325A1 Pumpe für heiße korrosive Schmelzen Pump for corrosive hot melt
05/02/1997EP0770184A1 Automatic pneumatic pump
04/1997
04/01/1997US5616006 Pumping method and device with sequential jets
04/01/1997US5616005 Fluid driven recipricating apparatus
03/1997
03/18/1997US5611672 Pumping chamber movement activated downhole pneumatic pump
03/18/1997US5611671 Pumping system for groundwater sampling
02/1997
02/05/1997EP0757183A1 Machine for lifting liquids
01/1997
01/09/1997DE19542015A1 Druckbetriebene Pumpen Pressure driven pumps
12/1996
12/27/1996WO1996041956A1 Magnetically controlled liquid transfer system
12/27/1996EP0749534A1 Engine coolant extractor/injector with double shut-off coupling
12/27/1996CA2210099A1 Magnetically controlled liquid transfer system
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