| 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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| 12/17/1996 | US5584179 Pumping machine and generator system utilizing the same |
| 12/10/1996 | US5582366 Satellite fueling system and method therefor |
| 11/20/1996 | EP0636229B1 Procedure and apparatus for compressing gas flowing through a conduit |
| 11/14/1996 | WO1996035880A1 Automatic pneumatic pump |
| 11/14/1996 | CA2193973A1 Automatic pneumatic pump |
| 10/09/1996 | CN1132820A Method and apparatus forintermittent production of oil with mechanical interface |
| 09/26/1996 | DE4425504A1 Water turbine wheel design |
| 09/18/1996 | EP0732479A2 Remotely adjustable valve and method for using same |
| 09/12/1996 | WO1996027551A1 Dosage pump |
| 08/27/1996 | US5549157 Electronic counter with pump-mounted sensor for cycle indication |
| 07/25/1996 | WO1996022222A1 Satellite fueling system and method therefor |
| 07/16/1996 | US5535767 Remotely actuated adjustable choke valve and method for using same |
| 07/02/1996 | US5531240 Method and apparatus for spill free liquid transfer |
| 06/13/1996 | DE4443222A1 Method and device for cleaning swimming pool whirlpool device |
| 06/11/1996 | US5525042 Liquid pump with compressed gas motive fluid |
| 06/11/1996 | US5524355 Method and device for the transport of a liquid-gas mixture in a paper making machine |
| 06/06/1996 | WO1996017172A1 Integrated electrical discharge microactuator and microsystem comprising same |
| 05/14/1996 | US5515880 Spoolable coiled tubing mandrel and gas lift valves |
| 04/30/1996 | US5511954 Water pumping system using solar energy |
| 03/14/1996 | DE4324335A1 Solar well pump and focussing mirror arrangement esp. for raising irrigation water from deep shafts |
| 03/05/1996 | US5495890 For directing liquid out of a well |
| 01/30/1996 | US5487647 Pneumatically powered submersible fluids pump with casing activator and biasing means |
| 01/17/1996 | CN2217699Y Reciprocating pneumatic slurry-delivery pump with slurry-returning device |
| 01/16/1996 | US5483988 Spoolable coiled tubing mandrel and gas lift valves |
| 01/06/1996 | CA2153190A1 Intermittent jet pumping apparatus and method |
| 01/03/1996 | EP0689647A1 Pressurisation/partial vacuum pump for delivering predetermined amounts of a product |
| 12/27/1995 | CN1114010A Air pressure automatic water lift pump |
| 11/28/1995 | US5470206 Pneumatically powered submersible fluids pump with casing activator |
| 10/24/1995 | US5460161 Campfire water heating apparatus and method |
| 10/04/1995 | CN1109561A Pneumatic pump and its pneumatic liquid pump |
| 09/26/1995 | US5452765 For removing fluids from a subterranean formation |
| 09/19/1995 | US5451144 Air-operated pump |
| 09/14/1995 | WO1995024564A1 Engine coolant extractor/injector with double shut-off coupling |
| 09/14/1995 | CA2183574A1 Engine coolant extractor/injector with double shut-off coupling |
| 08/22/1995 | US5443187 Pump apparatus for pumping melt metal |
| 07/21/1995 | CA2140596A1 Method and device for the transport of a liquid-gas mixture in a paper making machine |
| 07/13/1995 | WO1995018685A1 Liquid recovery apparatus |
| 06/28/1995 | EP0660001A1 Pump device for sensitive liquids |
| 06/27/1995 | US5427505 Engine coolant extractor/injector with double shut-off coupling |
| 06/21/1995 | CN2201506Y Petroleum reclaimating pump |
| 06/14/1995 | DE4416591C1 Process and assembly to suck sediment from harbour, lake canal beds through pipe |
| 06/08/1995 | DE4341637A1 Reliable low-maintenance liq. pumping device |
| 05/30/1995 | USRE34957 Leak proof, preloaded, high-biasing force float-operated over-center valve actuating mechanism |
| 05/30/1995 | US5419400 Environmental vat |
| 05/24/1995 | CN2198430Y Pneumatic liquid pumping device |
| 05/02/1995 | US5411183 Liquid spray or foam dispensing apparatus |
| 04/05/1995 | EP0646224A1 Valve assembly and pump including said valve assembly |
| 03/28/1995 | US5400858 Groundwater recovery system |
| 03/23/1995 | WO1995008043A1 Groundwater recovery system |
| 03/08/1995 | CN2191309Y Pneumatic liquid conveyer |
| 03/01/1995 | CN1027770C Method and device for hydraulic extracting liquid |
| 02/23/1995 | DE4327978A1 Deep-well pump |
| 02/21/1995 | US5391057 Compressing gas flowing through a conduit |
| 02/14/1995 | CA2003509C Pump for liquid or slurries using pressurized gas |
| 02/01/1995 | EP0636229A1 Compressing gas flowing through a conduit. |
| 02/01/1995 | EP0636228A1 Compressing combustible gas flowing through a conduit |
| 01/18/1995 | CN2187696Y Pueumatic oil feeding pump |
| 01/17/1995 | US5382137 Multiple stage airlift pump |
| 12/26/1994 | CA2126733A1 Campfire water heating apparatus and method |
| 12/20/1994 | US5373897 Underground fluid recovery device |
| 12/07/1994 | EP0626892A1 Pump apparatus for pumping melt metal |
| 11/30/1994 | CN1095794A Pumping machine and generator system utilizing the same |
| 11/29/1994 | US5368447 Well testing or production facility transfer system |
| 11/22/1994 | US5366349 Automatic liquid pump with vapor flow prevention flow outlet valve |
| 11/09/1994 | EP0623084A1 Process and arrangement for draining a liquid residue from the bottom of a tank |
| 11/01/1994 | CA2042537C Gas lift valve |
| 10/26/1994 | CN2180816Y Energy-storage liquid supply device |
| 10/25/1994 | US5358038 For recovery of liquid hydrocarbons |
| 10/25/1994 | US5358037 For directing liquid out of a well |
| 10/12/1994 | EP0619433A1 Float operated pneumatic pump |
| 09/29/1994 | WO1994021924A1 Pressurisation/partial vacuum pump for delivering predetermined amounts of a product |
| 09/21/1994 | EP0616133A1 Pumping machine and generator system utilizing the same |
| 09/21/1994 | CN2177829Y Semi-automatic liquid pump |
| 09/16/1994 | CA2118772A1 Pumping machine and generator system utilizing the same |
| 09/07/1994 | EP0613526A1 Preloaded over-center valve actuating mechanism |
| 09/07/1994 | CN2176455Y Automatic vacuum converting apparatus of sand pump |
| 09/01/1994 | DE4243303C1 Process for cleaning a well shaft |
| 08/23/1994 | US5340283 Water pumping apparatus utilizing produced compressed air |
| 07/28/1994 | DE4302834A1 Operation of soft water pump without engine drive |
| 07/06/1994 | CN2171015Y Hand operated towerless water supply small equipment |
| 06/29/1994 | CN1088668A 液体重力平衡泵 Gravity pump liquid balance |
| 06/22/1994 | EP0602389A1 Liquid spraying or foam delivering apparatus |
| 06/15/1994 | CN2168973Y Deep-well pump |
| 06/14/1994 | US5320252 Liquid dispensing apparatus for dispensing a liquid under pressure from a container by means of pressurized fluid |
| 06/09/1994 | DE4401582A1 Method of continuous delivering of fluid-gas mixture - involves having gas separated from fluid-gas flow between first and second level above which it is directed |
| 06/01/1994 | EP0599196A1 A water pumping apparatus |
| 05/31/1994 | US5316196 Fluid dispenser, in particular for gluing parts |
| 05/31/1994 | US5316179 System for dispensing a known volume of fluid |
| 05/17/1994 | US5312232 Pump for molten metal or other fluid |
| 04/27/1994 | EP0594011A1 Electrolytic pump |
| 04/12/1994 | US5301749 Dual pump floating layer recovery apparatus |
| 04/06/1994 | CN2160783Y Oil or liquid pumping device |
| 03/31/1994 | DE4232361A1 Sensitive liq. transport device - provides suction lift action e.g. in biological clarification plant |
| 03/02/1994 | EP0491009B1 Fluid dose feeder particularly for glueing workpieces |
| 03/02/1994 | EP0486528B1 Method and device for pumping liquid at high temperature through a pipe |
| 02/24/1994 | DE4242225A1 Pump for feeding measured amount of powered lacquer - with metering disc carrying quantities of powered lacquer to air flow conduit |
| 01/12/1994 | CN2152930Y 虹吸输油管 Siphon pipeline |
| 12/23/1993 | WO1993025833A1 Valve assembly and pump including said valve assembly |
| 11/30/1993 | US5265653 Portable pneumatic liquid transfer assembly |
| 11/17/1993 | CN1078541A 蒸汽抽水机 Steam Pump |