| Patents for F04B 7 - Piston machines or pumps characterised by having positively-driven valving (2,226) |
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| 03/24/2009 | CA2404865C Apparatus and method for customizing cosmetic products |
| 03/18/2009 | CN101387276A Axial plunger type high voltage common rail pump |
| 02/26/2009 | US20090053087 plunger for a sucker rod pump |
| 02/26/2009 | US20090053086 Volumetric pump with reciprocated and rotated piston |
| 02/26/2009 | DE102008012358A1 Electrically operated transportable high pressure cleaning device, has device housing, and chassis comprising rolling bodies that are designed for clamping device supporting surface, where bodies protrude over bottom counter of housing |
| 02/19/2009 | DE10222657B4 Fluidverdichtungsvorrichtung Fluid compression device |
| 02/18/2009 | EP2024640A2 A volumetric pump comprising a driving mechanism |
| 02/11/2009 | CN100460679C Piston pump used for conveying hydraulic fluid and braking equipment and stabilizing system of vehicle |
| 02/11/2009 | CN100460672C Pump system for conveying lubricating oil |
| 02/05/2009 | WO2009015915A1 Dual chamber mixing pump |
| 02/05/2009 | CA2695067A1 Dual chamber mixing pump |
| 01/29/2009 | WO2008141690A3 Pump |
| 01/28/2009 | CN201187426Y Differential constant displacement pump |
| 01/21/2009 | CN101351642A Mikropumpe |
| 01/14/2009 | CN100451568C Liquid discharging apparatus and liquid discharging method |
| 01/13/2009 | US7476087 Pump controller for precision pumping apparatus |
| 01/08/2009 | WO2009003785A2 Pipe junction for two-cylinder viscous matter pumps |
| 01/08/2009 | WO2009003443A1 Valve-controlled hydraulic machine |
| 01/08/2009 | DE212006000098U1 Rückschlagventil für eine Schwingkolbenpumpe Check valve for a piston pump |
| 01/07/2009 | EP2010785A1 Metering pump |
| 01/07/2009 | EP2010784A1 Pump element and pump comprising such a pump element |
| 01/07/2009 | CN100448492C Liquid drug delivery micropump |
| 01/06/2009 | CA2426306C Gas displaced chamber lift system with closed loop/multi-stage vents |
| 12/24/2008 | CN101328873A Pressure type pump reducing pulsation for vehicle slip control system |
| 12/18/2008 | US20080310979 Piston Pump With Improved Efficiency |
| 12/18/2008 | US20080310971 Piston pump |
| 12/18/2008 | US20080310969 Dual chamber mixing pump |
| 12/10/2008 | CN201162636Y Self-help oil pumping device |
| 12/09/2008 | US7462020 Concrete pump with pivotable hopper asssembly |
| 12/04/2008 | US20080298989 Rotary and translating displacement device |
| 12/03/2008 | CN101317008A Positive displacement pumping device comprising a joint-free dispensing member |
| 11/27/2008 | WO2008141690A2 Pump |
| 11/13/2008 | DE102008019783A1 Displacement dosing pump e.g. for coating materials, has two counter-acting plungers for displacing supply medium |
| 10/28/2008 | US7441561 Reinforced valve assembly |
| 10/15/2008 | EP1979614A1 Operating method for a hydraulic machine |
| 10/15/2008 | EP1817499B1 Volumetric pump with reciprocated and rotated piston |
| 10/15/2008 | CN201131718Y Steam mop water-supply switch water pump |
| 10/08/2008 | CN201129279Y Multiple gear ratios transmission high-power high-pressure plunger pump |
| 10/08/2008 | CN100424342C Oscillating disc sliding valve pintle axial plunger pump (motor) |
| 10/02/2008 | DE202008008060U1 Doppelkolbenpumpe Double piston pump |
| 10/01/2008 | EP1407143B1 Magnetically actuated pump |
| 10/01/2008 | CN201125848Y Negative pressure cylinder |
| 09/23/2008 | US7427190 Hydraulic device for pumping molten metal and/or controlling a molten metal flow |
| 09/12/2008 | WO2007141681A3 A volumetric pump comprising a driving mechanism |
| 09/10/2008 | EP1966490A2 Micropump |
| 09/04/2008 | US20080213105 Reciprocating Piston Pump with Air Valve, Detent and Poppets |
| 09/03/2008 | CN100416095C Device and method for controlling a thick matter pump |
| 09/02/2008 | US7419367 Magnetically actuated pump |
| 08/28/2008 | WO2007119149A8 Displacement dosing device and corresponding movement apparatus |
| 08/28/2008 | US20080206081 Piston pump |
| 08/28/2008 | US20080206080 Apparatus and Method for Compressing a Cryogenic Media |
| 08/27/2008 | EP1749153A4 Fluid connection |
| 08/26/2008 | US7415829 Piston compressor |
| 08/14/2008 | US20080193302 Mini Pump's Nozzle Device and Handhold Portion Made of Dual Material with Different Hardness |
| 08/07/2008 | US20080187449 Pump system with integrated piston-valve actuation |
| 08/06/2008 | EP1952021A1 Positive displacement pumping device comprising a joint-free dispensing member |
| 08/06/2008 | CN201096063Y Motor-driven reciprocating pump with unloading function |
| 08/06/2008 | CN201096062Y ABS plunger pump structure |
| 08/06/2008 | CN101238288A Apparatus to concentrate a fluid and a multiple chamber pump |
| 08/05/2008 | US7407022 Apparatus for pumping drill cuttings and dual cylinder positive displacement pump for moving drill cuttings and method of use |
| 07/31/2008 | WO2008089954A1 Device for metering out a flowable mass |
| 07/30/2008 | EP1948942A1 Pressure exchanger |
| 07/30/2008 | CN100406723C Piston pump |
| 07/24/2008 | DE102007011015A1 Vorrichtung zum dosierten Zuführen einer fliessfähigen Masse Device for metered feeding a flowable mass |
| 07/23/2008 | CN101228381A Fluid connecting device |
| 07/23/2008 | CN101225806A Fluid piston pump |
| 07/23/2008 | CN101225805A Non-leakage reversed flow type plunger pump |
| 07/22/2008 | CA2227859C Volumetric pump with bi-directional sphincter seal |
| 07/19/2008 | CA2618556A1 Electric submersible pump and motor assembly |
| 07/16/2008 | EP1944511A1 Material feed receptacle for a thick matter pump |
| 07/16/2008 | CN100402846C Piston compressor |
| 07/09/2008 | CN100400865C Sliding device for a viscous material pump, and wear strip therefor |
| 07/02/2008 | EP1687524B1 High pressure feed pump for internal combustion engines |
| 06/19/2008 | US20080145250 Oiler pump |
| 06/04/2008 | EP1749152B1 Drive device for a dual-cylinder slurry pump and method for operating said pump |
| 06/03/2008 | US7381031 Control valve for variable displacement compressor |
| 05/29/2008 | US20080121101 Double check valve having floating function |
| 05/28/2008 | CN101187362A Pump for a fluid, in particular manual pump for use in internal combustion engines operated with diesel fuel |
| 05/28/2008 | CN101187361A Multi-channel pump and its control method |
| 05/22/2008 | US20080118381 Variable displacement vane pump and method of manufacturing the same |
| 05/20/2008 | US7374409 Reciprocating pump |
| 05/20/2008 | US7374406 System and method for reducing noise in multi-capacity compressors |
| 05/15/2008 | US20080112830 Autoclavable piston guide ring |
| 05/14/2008 | EP1727980B1 Device and method for controlling a two-cylinder thick matter pump |
| 05/08/2008 | WO2008012587A3 A digital hydraulic pump/motor torque modulation system and apparatus |
| 05/08/2008 | WO2007119149A3 Displacement dosing device and corresponding movement apparatus |
| 05/08/2008 | US20080107553 Method of pumping drill cuttings and pump for moving drill cuttings |
| 05/08/2008 | DE102006052226A1 Hydraulic work machine e.g. axial piston machine, for use as e.g. piston pump, has additional suction valve which is provided parallel to inlet control arrangement by which operating area is connected with pressurizing medium inlet |
| 05/08/2008 | DE102006052225A1 Hydraulic machine e.g. radial piston machine, has pistons rotatable by drive relative to inlet to adjust effective inlet cross section to respective working chamber, where relative position of each piston is individually adjustable to inlet |
| 05/06/2008 | CA2405884C Reversible pump for driving hydraulic cylinders having a single piston that simultaneously reciprocates and rotates |
| 04/17/2008 | US20080089800 Fluid connection |
| 04/08/2008 | US7354255 Piston vibratory pump |
| 04/02/2008 | EP1906012A1 Device and method for controlling a two-cylinder pump for high-viscosity fluids |
| 04/02/2008 | CN100378329C Control valve for variable displacement compressor |
| 03/25/2008 | US7347673 Fluid machine served as expansion device and compression device |
| 03/20/2008 | WO2007061870A3 Cam driven piston compressor apparatus |
| 03/19/2008 | CN100375837C Multi-channel pump and its control method |
| 03/13/2008 | WO2008012558A3 Hydrostatic regenerative drive system |
| 03/12/2008 | CN101142406A Fixed and variable compressor system capacity control |
| 03/12/2008 | CN101139978A Automotive reciprocating pump having unloading function |