| Patents for F04B 5 - Machines or pumps with differential-surface pistons (514) |
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| 09/17/2009 | WO2009111970A1 Hydraulic cylinder, oil pumping unit, oil pumping module and oil pumping system |
| 09/15/2009 | US7588423 Pump for liquid chromatograph |
| 09/09/2009 | EP2097643A1 Compressor |
| 08/20/2009 | WO2009100858A1 Device for concentrating a liquid by means of a differential piston pump |
| 08/20/2009 | DE102008009195A1 Vorrichtung zum Aufkonzentrieren einer Flüssigkeit mittels einer Differentialkolbenpumpe An apparatus for concentrating a liquid by means of a differential piston pump |
| 08/05/2009 | EP1750514B1 Double-acting, high-pressure cryogenic pump |
| 08/05/2009 | CN201284727Y Two-stage flux plunger water pump and fire extinguishing system composed of the same |
| 07/29/2009 | CN101495749A Piston for a vehicle brake system piston pump |
| 07/21/2009 | US7563078 Reciprocating compressor |
| 07/09/2009 | WO2009083095A1 Hydraulic arrangement for a power-actuated actuator |
| 07/02/2009 | DE102007063360A1 Hydraulikanordnung für eine kraftbetätigte Stelleinheit Hydraulic system for a power-operated actuator |
| 06/11/2009 | WO2009070906A1 Compressor and apparatus for compressing two gases at high pressure |
| 06/11/2009 | WO2009070853A1 A pumping apparatus |
| 06/10/2009 | EP2067992A1 Compressor and apparatus for compressing two gases at high pressure |
| 06/04/2009 | DE102006056600B4 Hochdruckpumpe High pressure pump |
| 04/22/2009 | EP2049795A1 Piston for a vehicle brake system piston pump |
| 04/22/2009 | EP2049793A1 Vehicle brake system piston pump comprising a piston |
| 04/22/2009 | CN100480491C Apparatus with piston having upper piston extensions |
| 02/19/2009 | US20090047144 Fluid Compressor and Motor Vehicle Refuelling Apparatus |
| 12/31/2008 | EP2008036A1 Refrigerating system with parallel staged economizer circuits using multistage compression |
| 12/23/2008 | CA2488851C Multi-directional pump |
| 12/18/2008 | WO2008151628A1 Two-step-pump |
| 12/17/2008 | CN201165964Y Hydraulic pump, oil pumping unit, oil pumping module and oil pumping system |
| 11/12/2008 | EP1989446A1 Fluid compressor and motor vehicle refuelling apparatus |
| 11/04/2008 | US7445435 Double-acting reciprocating downhole pump |
| 10/30/2008 | US20080267801 Double action simplex diaphragm pump |
| 10/16/2008 | US20080253903 Vacuum pumps with auxiliary pumping stages |
| 10/09/2008 | WO2008120539A1 High-pressure generation device |
| 10/09/2008 | DE102007016627A1 Radial piston pump for use as e.g. feed pump, in motor vehicle, has crosshead arranged in pump housing recess such that it forms low pressure piston, and part of recess forms low pressure chamber supplied with pressure from crosshead |
| 09/03/2008 | CN100416156C Combined liquefied gas and compressed gas re-fueling station and method of operating same |
| 08/06/2008 | CN101238288A Apparatus to concentrate a fluid and a multiple chamber pump |
| 07/31/2008 | WO2007130850A3 Single stage to two stage compressor |
| 07/30/2008 | EP1750514A4 Double-acting, high-pressure cryogenic pump |
| 07/30/2008 | CN100406723C Piston pump |
| 07/09/2008 | CN101216022A Plunger ported axial plunger hydraulic pump |
| 07/08/2008 | US7396218 Micro irrigation pump |
| 06/26/2008 | US20080152522 Fluid Pump and Motor Unit |
| 06/24/2008 | US7390175 Double action simplex plunger pump |
| 03/13/2008 | WO2008028735A1 Linear compressor with two compression chambers |
| 03/11/2008 | CA2559502A1 Discharge pressure actuated pump |
| 02/20/2008 | EP1831547B1 Piston pump provided with at least one step piston element |
| 02/12/2008 | US7329105 Multi-directional pump |
| 02/07/2008 | WO2008015068A1 Piston for a vehicle brake system piston pump |
| 02/07/2008 | WO2008015067A1 Vehicle brake system piston pump comprising a piston |
| 02/07/2008 | DE102006035708A1 Fahrzeugbremsanlagen-Kolbenpumpe mit einem Kolben Vehicle brake piston pump with a piston |
| 02/07/2008 | DE102006035705A1 Kolben einer Fahrzeugbremsanlagen-Kolbenpumpe Piston of a vehicle brake piston pump |
| 01/09/2008 | EP1874444A2 Fluid pump and motor unit |
| 01/03/2008 | DE102006030141A1 Pressure supply unit for hydraulic systems comprises electric motor which feeds fluid to two cylinders via pipes fitted with non-return valves, cylinders also being fitted with return flow pipes each of which also has non-return valve |
| 12/26/2007 | CN101094970A Dynamic system for refrigeration equipment |
| 12/05/2007 | CN101084373A 往复泵系统 Reciprocating pump system |
| 11/21/2007 | EP1702162B1 Piston compressor for compressing gaseous media in at least two working chambers |
| 11/01/2007 | US20070253847 Valve assembly |
| 10/30/2007 | US7287458 Yoke mechanism for compressor |
| 10/23/2007 | US7284575 Combined liquefied gas and compressed gas re-fueling station and method of operating same |
| 10/04/2007 | WO2007111586A1 Refrigerating system with parallel staged economizer circuits using multistage compression |
| 09/25/2007 | US7273355 Compressor assembly with piston having multiple cross sections |
| 09/19/2007 | EP1834093A1 Reciprocating pump system |
| 09/12/2007 | EP1831547A1 Piston pump provided with at least one step piston element |
| 08/30/2007 | US20070201999 Heat pump system, method for adjusting temperature of lubricating water in heat pump system, and method for operating heat pump system |
| 08/30/2007 | DE19854787B4 Vorrichtung zum Befüllen eines hydrodynamischen Retarders A device for filling of a hydrodynamic retarder |
| 08/30/2007 | DE19801188B4 Fußpumpe zum Betrieb hydraulischer Werkzeuge, Zylinder o. dgl. Foot pump for operating hydraulic tools, cylinder o. The like. |
| 08/23/2007 | WO2007093826A1 Fluid compressor and motor vehicle refuelling apparatus |
| 08/14/2007 | US7255071 Supercharged two-stroke engine with upper piston extensions |
| 07/25/2007 | CN1328512C 微型灌溉泵 Micro-irrigation pump |
| 07/18/2007 | EP1644672B1 Heat pump system |
| 06/20/2007 | EP1798415A1 High pressure pump |
| 06/19/2007 | US7231894 Rotary positive displacement machine |
| 06/14/2007 | US20070134107 Feeding pump device of volume tube continually metering type |
| 06/13/2007 | EP1795749A1 High pressure pumping apparatus with coupled volumes in a pump working chamber |
| 06/05/2007 | US7226276 Multi-stage reciprocating vacuum pump and method of operating the same |
| 05/30/2007 | EP1789679A1 Energy-saving high-capacity compressor |
| 05/24/2007 | US20070116588 Piston compressor for compressing gaseous media in at least two working chambers |
| 05/18/2007 | WO2004090338A3 Dynamic system for refrigeration equipment |
| 05/03/2007 | WO2006114591A3 Fluid pump and motor unit |
| 04/18/2007 | EP1775469A2 A pump |
| 04/18/2007 | EP1775468A2 A valve assembly |
| 03/27/2007 | US7195464 Hydraulic axial piston pump |
| 03/15/2007 | DE102005044904A1 Electromagnetically driven dosing pump for use as fuel pump, has plate and ball valves provided with different characteristic frequencies, where ball valve is opened and closed during forward and backward motions of piston, respectively |
| 03/14/2007 | CN1930387A Apparatus with piston having upper piston extensions |
| 02/22/2007 | WO2007022227A1 Supercharged two-stroke engine with upper piston extensions |
| 02/15/2007 | WO2007016988A1 Device for concentrating a liquid, and differential piston pump |
| 02/14/2007 | EP1752662A1 Apparatus to concentrate a fluid and a multiple chamber pump |
| 02/14/2007 | EP1750514A2 Double-acting, high-pressure cryogenic pump |
| 02/11/2007 | CA2514817A1 Reciprocating double acting pump |
| 11/29/2006 | EP1725754A1 Apparatus with piston having upper piston extensions |
| 11/29/2006 | EP1019007B1 Counterpulsation device using noncompressed air |
| 11/28/2006 | US7140846 Vacuum pump having main and sub pumps |
| 11/21/2006 | US7137792 Piston pump for high viscous materials |
| 11/02/2006 | WO2006114591A2 Fluid pump and motor unit |
| 10/24/2006 | CA2473077C Reciprocating double acting compressor |
| 09/20/2006 | EP1702162A1 Piston compressor for compressing gaseous media in at least two working chambers |
| 09/19/2006 | US7108024 Apparatus for the simultaneous filling of precise amounts of viscous liquid material in a sanitary environment |
| 08/31/2006 | DE19812043B4 Kolbenpumpe Piston pump |
| 08/03/2006 | DE102005017283B3 Piston pump for use in hydraulic or elctro-hydraulic vehicle brake system, has sealing unit for fluid-seal closing of chamber with respect to operating mechanism for piston that is partitioned into two sections |
| 08/02/2006 | CN1813131A Piston pump |
| 07/06/2006 | DE102004061810A1 Kolbenpumpe mit wenigstens einem Stufenkolbenelement Piston pump with at least one stepped piston element |
| 07/05/2006 | CN1798945A Heat pump system |
| 06/29/2006 | WO2006066994A1 Piston pump provided with at least one step piston element |
| 06/22/2006 | WO2006065718A1 Reciprocating pump system |
| 06/22/2006 | CA2591345A1 Reciprocating pump system |