| 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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| 04/23/2009 | US20090104046 Rotary pressure transfer devices |
| 04/22/2009 | EP1869327B1 A method and a system for raising a liquid |
| 04/21/2009 | CA2419713C A system and method for compressing a fluid |
| 04/15/2009 | CN101410631A Optimisation of dead space in pistonless compressors |
| 04/15/2009 | CN101410630A Optimisation of dead space in pistonless compressors |
| 04/15/2009 | CN101410629A Device, and method for feeding substances |
| 04/09/2009 | DE102007047376A1 Oil pump for e.g. suction of oil, has channel associated with ambient air via another channel and air inlet of third channel, so that air enters chamber via through hole of former channel to produce pressure for pumping down oil |
| 03/26/2009 | WO2009039126A1 Method and system for fluid transmission along significant distances |
| 03/26/2009 | CA2693158A1 Method and system for fluid transmission along significant distances |
| 03/19/2009 | WO2009034421A1 A multistage hydro-pneumatic motor-compressor |
| 03/17/2009 | US7503176 Liquid pump and Rankine cycle apparatus |
| 02/19/2009 | US20090047140 Airlift pump |
| 02/19/2009 | US20090047139 Method and a System for Raising a Liquid |
| 02/18/2009 | EP2024577A1 Waste water pumping device |
| 02/17/2009 | US7491035 Cyclic condensate pump having a three-way valve |
| 02/12/2009 | WO2009018599A1 Pump apparatus |
| 02/10/2009 | US7488159 Zero-clearance ultra-high-pressure gas compressor |
| 01/29/2009 | US20090028721 System for dewatering boreholes by means of alternative cycles of vacuum and exhaust, based on the principle of pneumatic displacement |
| 01/28/2009 | EP2019209A1 Device and method for feeding substances |
| 01/27/2009 | CA2356425C Pulsed combustion device and method |
| 01/22/2009 | US20090022603 Method for the Pneumatic Conveying of Water-Absorbent Polymer Particles |
| 01/14/2009 | EP2013485A2 Gas lift chamber purge and vent valve and pump systems |
| 01/14/2009 | CN201180697Y Air lift device used for mixed liquid reflux |
| 01/14/2009 | CN201180696Y Pneumatic oiling device |
| 01/07/2009 | CN201176975Y Chain saw lubrication oil supply pump |
| 01/07/2009 | CN201176974Y High efficiency charcoal slurry lifting and separating device |
| 12/31/2008 | CN201173219Y Automatic type water pump |
| 12/24/2008 | EP2006454A2 Pump for draining bores by means of alternating aspiration and expulsion cycles, based on the principle of pneumatic displacement |
| 12/17/2008 | EP1841968B1 A device for transportation of liquids by steam or compressed air |
| 12/17/2008 | CN201166014Y Novel wind power water pump |
| 12/10/2008 | EP1999383A1 Optimisation of dead space in pistonless compressors |
| 12/10/2008 | EP1999382A1 Optimisation of dead space in pistonless compressors |
| 12/10/2008 | CN201162732Y Pressure automatic-control water raiser |
| 12/04/2008 | US20080298979 Engine |
| 11/20/2008 | US20080286123 Oil pump system for vehicle |
| 11/20/2008 | US20080286122 Gas-driven liquid pump |
| 11/19/2008 | EP1992866A2 Liquid pressure-feed device |
| 11/19/2008 | CN201152292Y Precast beam plate prestressing force pore passage air negative-pressure device |
| 11/18/2008 | US7451687 Hybrid nutating pump |
| 11/13/2008 | WO2008046120A3 Absorption refrigerator |
| 11/05/2008 | CN201144889Y Water wax joint |
| 11/05/2008 | CN201144888Y Air pressure type fountain pump |
| 11/04/2008 | US7445049 Gas operated pump for hydrocarbon wells |
| 10/22/2008 | EP1982074A1 Device, and method for feeding substances |
| 10/07/2008 | US7431570 Capillary pumps for vaporization of liquids |
| 10/02/2008 | US20080240934 Liquid pressure-feed device |
| 10/01/2008 | CN101275590A Method and apparatus for hoisting waste water with tap water pressure |
| 09/30/2008 | US7428929 Method and apparatus for lifting liquids from gas wells |
| 09/24/2008 | EP1910675B1 Engine |
| 09/18/2008 | US20080226470 Liquid pressure-feed device |
| 09/18/2008 | US20080226469 Liquid pressure-feed device |
| 09/11/2008 | US20080219859 Automatic pressure-relieving apparatus for suction pump |
| 08/27/2008 | CN101253333A Centrifugal fan and air conditioner using the same |
| 08/21/2008 | DE202008007482U1 Pneumatische chemische Pumpe Pneumatic chemical pump |
| 08/21/2008 | DE102007008431A1 Air-lift pump delivery rate optimizing method for use in e.g. small sewage plant, involves intermittently passing even resulting compressed-air on inlet area of pulsator with corresponding unpressurized interval on air-lift pump |
| 08/13/2008 | CN101243258A Non-positive compressor |
| 08/13/2008 | CN100410548C Heating power pump |
| 07/30/2008 | EP1948941A1 Pressure-generating pipe device for a pressure vessel |
| 07/30/2008 | CN101233320A Engine |
| 07/24/2008 | WO2008005437A3 Positive displacement hydro pump |
| 07/17/2008 | DE102007002164A1 Sump pump for seepage liquid has compressed air line ending in upper part of collection cavity and venting valve in compressed air line to close venting line |
| 07/15/2008 | US7399085 Cooling fan |
| 07/03/2008 | US20080156373 Fluidic Oscillator |
| 07/02/2008 | CN201080927Y Water pump main body lower cap |
| 06/26/2008 | WO2008074428A1 Fluid machine |
| 06/26/2008 | US20080149187 Piloting actuator valve for subterranean flow control |
| 06/25/2008 | CN201078361Y Top cover of pump water machine body |
| 06/25/2008 | CN201078360Y Pump water machine |
| 06/19/2008 | WO2008072629A1 Sealing and pumping device |
| 06/18/2008 | CN201074611Y Monte jus with injector |
| 06/12/2008 | US20080138220 Hydraulic pump of automatic transmission |
| 06/10/2008 | CA2362710C Leachate and depollution pneumatic pump with sleeve valve |
| 05/28/2008 | CN101189437A Liquid for compressing a gaseous medium and use of the same |
| 05/15/2008 | US20080112817 Adjustable cycle timer control for aerators |
| 05/15/2008 | CA2568188A1 Venturi effect power generator |
| 05/07/2008 | CN201057177Y Movement of condensation water automatic pump |
| 05/06/2008 | US7367366 Pumping device |
| 04/24/2008 | CA2666172A1 Absorption refrigerator |
| 04/23/2008 | EP1913264A1 Non-positive compressor |
| 04/16/2008 | EP1910675A1 Engine |
| 04/08/2008 | US7353836 Device for purging deposit from an engine |
| 04/08/2008 | CA2474064C Gas operated pump for hydrocarbon wells |
| 03/27/2008 | WO2008034519A1 Valve arrangement for a hydrostatic machine, in particular for an axial piston machine |
| 03/27/2008 | US20080075605 Valve and micro fluid pump having the same |
| 03/27/2008 | DE102006042918A1 Kolbenloser Verdichter Clear piston compressor |
| 03/20/2008 | WO2008031527A1 Pistonless compressor |
| 03/20/2008 | CA2661112A1 Pistonless compressor |
| 03/19/2008 | CN201037479Y Device for lifting water by compressed air |
| 03/18/2008 | US7343924 System for supplying halogen gas or halogen containing gas and method thereof |
| 03/06/2008 | WO2008025432A1 Piston-free compressor |
| 03/06/2008 | DE102006040785A1 Kolbenloser Verdichter Clear piston compressor |
| 03/05/2008 | CN201031821Y Electric power free water raising engine |
| 02/28/2008 | US20080050248 Method For Transportation Of Liquids By Steam Or Compressed Air And A Device For Realization Of The Method |
| 02/27/2008 | EP1311766A4 Dual chamber liquid pump |
| 02/20/2008 | EP1309798A4 A system and method for compressing a fluid |
| 01/30/2008 | CN101113742A Device for water lifting by compressed-air |
| 01/23/2008 | CN101109397A Montejus equipped with injector |
| 01/17/2008 | US20080011466 Micro-cycle energy transfer systems and methods |
| 01/16/2008 | EP1877668A1 Liquid for compressing a gaseous medium and use of the same |
| 01/16/2008 | CN100362246C Cooling fan |