| Patents for F04F 3 - Pumps using negative pressure acting directly on the liquid to be pumped (370) |
|---|
| 01/03/2007 | EP1737323A1 Liquid aspirator |
| 11/21/2006 | US7137786 Tilting transmission gearbox comprising a pivoting connection with plain bearings |
| 10/24/2006 | US7124769 High rise tower sanitary service system |
| 10/18/2006 | CN1847530A Water feeding method |
| 09/12/2006 | US7104290 Joint for a fluid pumping apparatus |
| 05/30/2006 | US7051759 Processing apparatus having integrated pumping system |
| 05/17/2006 | CN2781054Y Centrifugal vacuum diversion device |
| 04/19/2006 | CN2773366Y Gun-type oil-suction pump |
| 04/05/2006 | CN2769201Y Antitheft vacuum pump head hose |
| 02/16/2006 | US20060032531 High rise tower sanitary service system |
| 02/14/2006 | US6997204 High rise tower sanitary service system |
| 01/31/2006 | US6990993 Vacuum drainage system |
| 11/24/2005 | DE202005013309U1 Suction pump for oil contains pressure switch with shaft under it, spring round top of shaft and channel to receive shaft |
| 11/08/2005 | US6962176 Portable suction system |
| 11/01/2005 | US6959722 Device for adjusting the degree of vacuum in an apparatus for collecting substances by suction |
| 10/27/2005 | WO2005099542A1 Liquid aspirator |
| 10/27/2005 | CA2562459A1 Liquid aspirator |
| 10/19/2005 | CN2735057Y 热力泵 Heat pumps |
| 09/01/2005 | DE202004013914U1 Flüssigkeitssauger Liquid sucker |
| 08/31/2005 | EP1567039A2 Sludge extractor |
| 08/03/2005 | CN2714863Y Pneumatic lift pump |
| 06/15/2005 | EP1540190A1 Recirculating jet pump and method of moving material |
| 04/26/2005 | US6883535 Liquid handling apparatus |
| 03/23/2005 | CN1598328A Heating power pump |
| 03/10/2005 | US20050051211 Priming apparatus for a centrifugal pump |
| 03/02/2005 | EP1510230A1 Negative pressure medical infusion pump |
| 01/04/2005 | US6837258 Vacuum operated sealed liquid accumulator |
| 12/30/2004 | US20040261901 Joint for a fluid pumping apparatus |
| 11/16/2004 | US6818070 Portable, pumpless vacuum device; pleasant, sanitary |
| 11/16/2004 | US6817837 Jet pump with recirculating motive fluid |
| 11/11/2004 | DE202004013969U1 Device for pumping fluids has piston and piston rod with actuating lever fixed at upper end of latter and having on inside an air duct with narrowed neck in centre section with pressure reducing valve |
| 11/04/2004 | DE20309822U1 Oil extractor for freezer installation has transportable container with oil suction control valve connected to discharge hose and vacuum valve mounted on stub pipe |
| 07/21/2004 | CN2627265Y Full-automatic drainage water-air mixing suction machine |
| 06/29/2004 | US6755207 Venturi based liquid transfer apparatus |
| 06/10/2004 | WO2004019744B1 Sludge extractor |
| 06/09/2004 | CN1502825A Method and device for down-falling body/vacuum pumping liquid |
| 05/18/2004 | US6736603 Oil suction pump |
| 04/29/2004 | WO2004019744A3 Sludge extractor |
| 04/20/2004 | US6722855 Oil pumping device |
| 04/07/2004 | CN1144955C Method and apparatus for forming negative pressure to suck & store liquid utilizing engine |
| 03/25/2004 | US20040055639 Device for adjusting the degree of vacuum in an apparatus for collecting substances by suction |
| 03/18/2004 | DE10240804A1 Schlammsauger Sludge Pump |
| 03/11/2004 | WO2004019744A2 Sludge extractor |
| 01/29/2004 | WO2004010006A1 Recirculating jet pump and method of moving material |
| 01/29/2004 | CA2493936A1 Recirculating jet pump and method of moving material |
| 01/22/2004 | US20040013535 Recirculating jet pump and method of moving material |
| 01/22/2004 | US20040013534 Recirculating jet pump and method of moving material |
| 12/24/2003 | CN1131943C 利用水的蒸发和冷凝原理的平行多级热泵 Parallel utilization of the principle of water evaporation and condensation of a multi-stage heat pump |
| 12/18/2003 | US20030231964 Oil suction pump |
| 12/04/2003 | US20030223881 Manual/pneumatic oil pumping device |
| 11/13/2003 | US20030208876 Method of collecting and disposing wine expectorant from spit buckets and apparatus therefor |
| 04/16/2003 | EP0749534B1 Engine coolant extractor/injector with double shut-off coupling |
| 03/11/2003 | CA2357166A1 Secondary shut off valve for vacuum operated liquid tank and a vacuum operated liquid tank assembly |
| 02/18/2003 | US6521188 Microfluidic actuator |
| 02/13/2003 | WO2003012288A1 Pulsation type water raising and falling equipment |
| 11/26/2002 | US6484744 Oil pumping device |
| 10/16/2002 | CN1374461A Negative-pressure guide vane pump |
| 01/09/2002 | EP1169070A1 A fluid vacuum system |
| 11/27/2001 | US6321874 Device for removing lubricating oil from an engine |
| 11/14/2001 | EP1152785A1 Negative pressure medical infusion pump |
| 11/01/2001 | US20010035208 Liquid handling apparatus and container |
| 10/17/2001 | CN2454579Y Mud-intake valve |
| 09/19/2001 | CN2448971Y 真空式收油机 Vacuum skimmers |
| 09/04/2001 | US6283943 Negative pressure pump |
| 08/16/2001 | EP0760039B1 A vacuum unit and a vacuum toilet system comprising such a unit |
| 06/21/2001 | WO2001044666A1 Pumping device and pumping method |
| 04/11/2001 | CN1064429C A cacuum unit and a vacuum toilet system comprising such a unit |
| 02/27/2001 | US6193472 Fluid vacuum system |
| 10/03/2000 | US6125648 Multi-riser refrigeration system with oil return means |
| 09/27/2000 | CN1268210A Parallel multistage type hot water pump using water evaporation and condensation principle |
| 09/14/2000 | WO2000053238A1 A fluid vacuum system |
| 09/12/2000 | CA2300516A1 A fluid vacuum system |
| 08/24/2000 | WO2000048652A1 Negative pressure infusion pump |
| 06/14/2000 | CN1256368A Liquid sucking and storing method and apparatus to utilize an engine to form negative pressure |
| 02/23/2000 | CN2365435Y Self-absorbing device for pump |
| 12/22/1999 | CN2355155Y Energy saving pump |
| 11/11/1999 | WO1999057442A1 Parallel multistage type hot water pump using water evaporation and condensation principle |
| 11/03/1999 | CN2346976Y 虹吸水泵 Siphon pump |
| 11/02/1999 | US5975108 Automatic drain collecting and exhausting apparatus for semiconductor fabrication system |
| 08/31/1999 | CA2157797C Groundwater recovery system |
| 08/25/1999 | EP0749534A4 Engine coolant extractor/injector with double shut-off coupling |
| 07/21/1999 | EP0675987B1 Suction device |
| 07/21/1999 | CN2329802Y Liquid pumping device |
| 03/02/1999 | US5875640 Multi-story air conditioning system with oil return means |
| 12/16/1998 | EP0883544A1 Fluid thruster apparatus |
| 09/23/1998 | CN2292180Y Pneumatic water pump with air purifying and sterilizing device |
| 09/22/1998 | US5810772 Mother's milk pump |
| 09/17/1998 | WO1998040629A1 Vacuum pumping apparatus |
| 07/01/1998 | CN2285385Y Self-suction pump |
| 06/30/1998 | US5772402 Pre-charged vacuum fluid change/disposal apparatus |
| 05/26/1998 | US5754987 Vacuum unit and a vacuum toilet system comprising such a unit |
| 05/06/1998 | CN2280791Y Self-flowing liquid-guide device |
| 04/14/1998 | US5738499 Automotive fluid extraction and delivery device |
| 02/12/1998 | WO1998005869A1 Vacuum pumping apparatus |
| 01/27/1998 | US5711655 Pump system using a vacuum chamber and mechanical pump combinations |
| 12/31/1997 | CN2271629Y Siphon-pump |
| 09/10/1997 | CN2262131Y Liquid pump |
| 09/04/1997 | WO1997031818A1 Fluid thruster apparatus |
| 07/30/1997 | CN2258551Y Filtering type hand-siphon liquid-feeding pump |
| 07/23/1997 | CN2258236Y Self-priming pump |