| 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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| 01/09/1991 | CN2069047U High-speed and energy-saving fuel charger |
| 12/19/1990 | EP0403017A1 Mortar transport apparatus |
| 12/12/1990 | CN2067335U Hand booster liquid nitrogen pump |
| 11/07/1990 | EP0304466B1 Device for liquid pumping |
| 10/17/1990 | CN1010047B Automatic starting device using perfusion transfer pump system |
| 09/19/1990 | CN2062326U Oil filling device |
| 09/06/1990 | DE4006136A1 Continuous conveying of hot fluid - involves system of containers and pressure reservoir charged by centrifugal pump |
| 09/04/1990 | US4954048 Process and device for conveying boilable liquids |
| 08/15/1990 | CN2060485U Steam compressure suction water pump |
| 07/25/1990 | CN2059691U Antioverflowing device for dung pumping vehicle |
| 06/21/1990 | DE3842853A1 Thermal engine |
| 06/19/1990 | US4934561 Container discharge apparatus and method employing microwaves |
| 06/05/1990 | CA1269888A1 Intermittently functioning pneumatic device for pumping charged liquids |
| 05/23/1990 | CN2057480U Liquid suction device |
| 05/23/1990 | CN2057479U Push-pull type pump utilizing gas expansion and extraction |
| 05/08/1990 | US4922839 Fuel reactor |
| 04/12/1990 | DE3830716A1 System for raising water to a higher level |
| 04/03/1990 | CA1267360A1 Gas lift optimization |
| 03/21/1990 | CN2054853U Pneumatic liquid flow pump |
| 03/07/1990 | CN2054103U Superhigh lift suction device for centrifugal pump |
| 02/28/1990 | CN2053693U Pneumatic oil delivery device |
| 02/28/1990 | CN1040083A Heating power pump |
| 01/24/1990 | EP0351995A2 Flow injection analysis |
| 01/16/1990 | CA1264438A1 Methods and apparatus for recovery of hydrocarbons and other liquids from underground |
| 01/09/1990 | US4892294 Device for liquid pumping |
| 01/03/1990 | CN2050495U Hand-driven pressure liquid-pumping apparatus |
| 01/03/1990 | CN1038500A Self-suction apparatus using pump liquid-delivery system |
| 12/27/1989 | CN2050104U Self-flow mud and sand water valve |
| 12/27/1989 | CN2050103U Air-pressure beam-pumping unit |
| 12/13/1989 | CN1006056B Apparatus and method for emptying containers |
| 11/22/1989 | CN2048140U Barometric oil exhauster |
| 11/01/1989 | CN2046934U Domestic air compressor |
| 10/10/1989 | USRE33084 Intermittently operating pneumatic device for pumping solid-carrying liquids and slurries |
| 10/05/1989 | DE3809725A1 Apparatus for the conveyance of liquids |
| 10/04/1989 | CN2045379U Automatic fuel charger for vehicle |
| 10/03/1989 | US4871088 Pneumatic dispensers for viscous materials |
| 08/29/1989 | US4860857 Pistonless air powered lubricating system |
| 08/08/1989 | US4854783 Vertical hydro-hoist with adjustable floats and method of operating the same |
| 07/05/1989 | EP0322596A1 Method and device for transporting fluids about to boil |
| 07/04/1989 | US4844699 Submersible pump |
| 06/27/1989 | US4842487 Pumping device using pressurized gas |
| 06/21/1989 | EP0321081A2 Air supply method whereby water is raised for aeration |
| 05/02/1989 | US4826406 Pressure extraction pump system for recovering liquid hydrocarbons from ground water |
| 04/05/1989 | CN2035408U Liquid pumping device and storage tank |
| 04/04/1989 | US4818187 Fluid exchange pump |
| 03/01/1989 | EP0304466A1 Device for liquid pumping. |
| 03/01/1989 | CN2033455U Gasoline feeder |
| 02/15/1989 | EP0303376A2 Frail material slurry pump |
| 01/31/1989 | US4801246 Device for elevating liquids with a plurality of intermediate containers communicating with one another |
| 01/25/1989 | CN2031467U Efflux deep-well pump |
| 12/21/1988 | EP0295767A2 Manually actuating dispensing pumps |
| 12/20/1988 | US4792283 For transporting liquid by bubbles |
| 12/01/1988 | WO1988009437A1 Atmospheric pump using solar energy |
| 11/29/1988 | CA1245742A1 Well production controller system |
| 10/20/1988 | DE3710775A1 Process and apparatus for delivering water from bore wells |
| 09/27/1988 | US4773830 Control apparatus for a gas driven pump |
| 09/22/1988 | WO1988007165A1 Device for liquid pumping |
| 09/15/1988 | DE3736273A1 Method for conveying viscous fermentable media and pneumatic conveying device |
| 09/13/1988 | US4770610 Frail material slurry pump |
| 08/17/1988 | CN87204544U 气动泵 Pneumatic pumps |
| 08/11/1988 | DE3736327A1 Compressed-air siphon with open feed-air annular chamber in the suction foot |
| 07/20/1988 | EP0274620A2 Liquid dispensing pump |
| 07/13/1988 | EP0274374A2 Hydraulic pumping device |
| 07/12/1988 | US4756671 Low damage hydraulic fish pumping system |
| 06/22/1988 | CN87215782U Hand-pressure liquid sucking device |
| 05/31/1988 | US4747523 Manually actuated dispensing pump |
| 04/19/1988 | US4738313 Optimizing the production of well fluids |
| 03/30/1988 | CN87103050A Hydropneumatic water pumping apparatus |
| 02/16/1988 | US4725202 For use in a well |
| 01/20/1988 | CN87203909U Pneumatic pump-model b |
| 01/19/1988 | US4720246 Siphon-controlled pneumatic displacement pump |
| 01/07/1988 | EP0251664A1 Heat-driven pump |
| 12/03/1987 | WO1987007338A1 Fluid exchange pump |
| 11/24/1987 | US4708595 Intermittent oil well gas-lift apparatus |
| 11/07/1987 | CN86205312U Liquid accumulative pump |
| 09/09/1987 | EP0236129A2 Pneumatic dispensers for viscous materials |
| 08/19/1987 | CN86205386U Measuring glass with aspirator |
| 08/12/1987 | EP0232000A1 Method and apparatus for pumping liquid |
| 08/12/1987 | CN87100504A Method and apparatus for pumping liquid |
| 08/11/1987 | US4685868 Vacuum jet apparatus |
| 08/04/1987 | US4684295 Intermittently operating pneumatic device for pumping solid-carrying liquids and slurries |
| 07/02/1987 | WO1987003938A1 Compressed air operated submersible pump |
| 07/02/1987 | WO1987003865A1 Container discharge apparatus and method |
| 07/01/1987 | CN86208313U Pneumatic multi-purpose pump for lifting liquid |
| 07/01/1987 | CN86108829A Apparatus and method for emptying containers |
| 06/16/1987 | EP0225416A1 Pneumatic discontinually operating apparatus to pump charged liquids |
| 05/19/1987 | US4666377 Method and lift pump and raising liquids |
| 03/25/1987 | CN86104841A Pistonless pulse pump |
| 03/11/1987 | CN86202140U Pneumatic water raiser having air storage |
| 03/03/1987 | US4647272 Method and lift pump for raising liquids |
| 02/24/1987 | US4645427 Metering pump assembly |
| 02/17/1987 | US4643650 Fluid-raising apparatus driven by low hydraulic head |
| 01/06/1987 | US4633954 Well production controller system |
| 12/30/1986 | CA1215894A1 Apparatus for continuously pressure-feeding slurry |
| 12/23/1986 | CA1215657A1 Pressure vessel for receiving liquids to be conveyed |
| 12/23/1986 | CA1215582A1 Vapor pressure pump |
| 10/29/1986 | EP0198993A1 Air lift pump |
| 10/21/1986 | US4618077 Liquid dispensing pump |
| 08/26/1986 | US4607999 De-watering pump |
| 08/19/1986 | US4606703 Fluidic pumping systems with control means responsive to liquid level |