| Patents for F04F 3 - Pumps using negative pressure acting directly on the liquid to be pumped (370) |
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| 02/02/2011 | CN201730880U Air bag float valve type liquid pumping device |
| 01/19/2011 | CN201714723U Quinoline self-suction pump |
| 01/12/2011 | CN201705740U Negative pressure sucking pump |
| 01/12/2011 | CN101943185A Quinoline self-priming pump |
| 01/06/2011 | US20110000562 Controllable vacuum source |
| 11/17/2010 | CN201632358U Leak-proof air bag atomizing pump device |
| 11/03/2010 | CN201621109U Capture device for vacuum system |
| 10/27/2010 | CN201615095U 户用沼气池抽料泵 Household biogas feed pump pumping |
| 10/27/2010 | CN201615094U 真空抽吸装置的改良构造 Improved structure of vacuum suction device |
| 10/27/2010 | CN201615093U 一种多功能沼气抽排设备 A multifunctional gas extraction equipment |
| 10/20/2010 | CN201610869U 无菌溶液负压吸取器 Sterile solutions vacuum suckers |
| 10/19/2010 | US7814926 Liquid aspirator |
| 10/13/2010 | CN101858364A Air-driven pump |
| 09/21/2010 | US7798785 Automatic pressure-relieving apparatus for suction pump |
| 09/15/2010 | CN101830541A Underground reverse-osmosis seawater desalination vacuum plant system engineering |
| 09/08/2010 | CN201574984U Biogas slurry and biogas residue pump drainage pipeline for disc tractor |
| 09/08/2010 | CN201574789U Drainage device of steam jet ejector |
| 09/02/2010 | US20100218835 Sprayer Pump Primed By Using Venturi |
| 09/01/2010 | CN101818751A Multifunctional negative-pressure suction sprayer |
| 07/21/2010 | CN201531467U Self-absorbing structure of cleaning agent of high pressure cleaning machine |
| 07/07/2010 | CN201521494U Bladeless energy-saving water pump |
| 06/23/2010 | CN101749287A Vacuum slag pumping system |
| 06/15/2010 | CA2478716C Priming apparatus for a centrifugal pump |
| 06/09/2010 | CN101725577A Water suction type fire pump utilizing cylinder |
| 05/19/2010 | CN101709722A Engine oil recycling device |
| 05/12/2010 | CN101705950A Water suction device |
| 05/06/2010 | DE102007047376B4 Ölpumpe Oil pump |
| 03/04/2010 | WO2010022902A1 Pump installation |
| 02/10/2010 | CN201401375Y Life water pump |
| 01/13/2010 | CN101624999A Dangerous chemical leakage rescue equipment |
| 01/07/2010 | WO2009111616A3 Compressor assembly including separator and ejector pump |
| 01/05/2010 | US7641452 Manually operated vacuum pump and refill device |
| 12/30/2009 | WO2009157094A1 Method and device for producing a vacuum intermittently |
| 11/26/2009 | US20090288721 Vacuum unit for steam sterilizer |
| 11/25/2009 | CN101586583A Pumping device without power |
| 10/21/2009 | EP1737323B1 Liquid aspirator |
| 10/21/2009 | CN101560996A Vacant vacuum liquid pump |
| 10/07/2009 | CN101550949A Vacuum water injection method for radiator |
| 10/07/2009 | CN101550943A Automatic control turbine synchronous discharging and sucking pump |
| 10/01/2009 | US20090242046 Valve module |
| 09/23/2009 | CN101539158A Positive negative pressure siphon for closed container |
| 09/09/2009 | CN201306321Y Negative pressure pump |
| 08/19/2009 | CN101509507A Pollution discharge vacuum draw unit for train |
| 07/28/2009 | US7565765 Pneumatic liquid dispensing assembly for hydroponically cultivated plants |
| 07/15/2009 | CN201273306Y Pressure return apparatus of vacuum fluid absorbing vehicle |
| 07/09/2009 | US20090175735 Pump with a direct thrust recovery device for driving fluids |
| 06/24/2009 | CN101463840A Negative pressure pump and its control signal detection method |
| 05/20/2009 | CN201241879Y Wind guide pumping device |
| 05/13/2009 | CN201236828Y Novel water diversion device of water pump |
| 05/05/2009 | US7527480 Micropump for integrated device for biological analyses |
| 04/29/2009 | CN201228673Y Vacuum can |
| 04/16/2009 | US20090095360 Vacuum With Multiple Exhaust Points |
| 04/15/2009 | CN201221501Y Pneumatic hoisting device |
| 04/15/2009 | CN101408204A Air-intake liquid pump |
| 04/09/2009 | DE112007001141T5 Stranggießen reaktionsfreudiger Metalle unter Verwendung einer Glasschicht Continuous casting of reactionary metals using a glass layer |
| 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 |
| 04/01/2009 | CN101398016A Automatic injecting spray water-absorbing tank |
| 03/11/2009 | CN201206570Y Sewage collector for fish bowl |
| 03/11/2009 | CN100467725C Water feeding method |
| 02/25/2009 | CN201198848Y Pressure water pumping machine |
| 02/05/2009 | US20090033186 Enclosure providing improved cooling for a heat-generating device |
| 02/05/2009 | US20090032125 Vacuum generating unit |
| 02/03/2009 | US7484370 Refrigerant gas recycling apparatus for cryogenic cooling device |
| 01/21/2009 | CN201184330Y Automatic control turbine synchronous discharging and sucking pump |
| 01/15/2009 | US20090016899 Oil well pump apparatus |
| 12/25/2008 | US20080314450 Flow Control |
| 12/10/2008 | CN201162733Y Sludge pump |
| 12/03/2008 | CN201159214Y Dirt suction device |
| 11/27/2008 | US20080289718 Liquid vacuum apparatus and method |
| 11/26/2008 | CN201155491Y Portable type faeces suction means |
| 11/19/2008 | CN201152276Y Negative-pressure water storage tank type centrifugal pump |
| 11/12/2008 | CN201147212Y Push type water-fetching machine |
| 10/29/2008 | CN201141366Y Pumping apparatus |
| 10/15/2008 | CN201133316Y Convenient type suction vehicle |
| 09/24/2008 | CN201121613Y Three-wheel vacuum liquid suction vehicle |
| 08/28/2008 | WO2007149652A3 System and method for evacuating a vacuum chamber |
| 08/13/2008 | CN201100273Y Manual liquid transporter |
| 08/13/2008 | CN100410548C Heating power pump |
| 07/30/2008 | CN201092451Y Special vehicle for pumping slags |
| 07/24/2008 | WO2008005437A3 Positive displacement hydro pump |
| 07/17/2008 | US20080170949 Manually operated vacuum pump and refill device |
| 07/09/2008 | CN101216050A Air-breathing liquid-drawing pump |
| 06/19/2008 | US20080142097 Fuel Supply Unit for a Motor Vehicle |
| 05/14/2008 | CN101178081A Pumping device |
| 02/26/2008 | US7334600 Priming apparatus for a centrifugal pump |
| 02/20/2008 | CN201023919Y Methane liquid and methane slag discharging vehicle |
| 02/05/2008 | CA2363694C Negative pressure infusion pump |
| 01/08/2008 | US7316544 Automatic pneumatic pump |
| 12/27/2007 | WO2007149652A2 System and method for evacuating a vacuum chamber |
| 12/05/2007 | CN200985913Y Hand hold type liquid honeycomb duct |
| 11/29/2007 | US20070272310 System And Method For Evacuating A Vacuum Chamber |
| 11/22/2007 | WO2007133547A2 Continuous casting of reactionary metals using a glass covering |
| 10/31/2007 | CN200968333Y Marsh gas cinder pumping car |
| 10/10/2007 | CN200958781Y Gas cooker with alarm clock |
| 09/26/2007 | CN200952499Y Self-priming valve on high-pressure cleaner |
| 08/30/2007 | US20070199595 Liquid Aspirator |
| 08/15/2007 | CN2934687Y Automatic lifting apparatus for water |
| 05/22/2007 | US7219692 Apparatus for conditioning the atmosphere in a chamber |
| 03/21/2007 | EP1567039B1 Sludge extractor |
| 02/08/2007 | WO2007015680A1 Pump |