| Patents for F04C 2 - Rotary-piston machines or pumps (14,296) |
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| 06/18/2009 | US20090152009 Nano particle reinforced polymer element for stator and rotor assembly |
| 06/18/2009 | DE102007060758A1 Flüssigkeitspumpe Liquid pump |
| 06/17/2009 | EP2071122A2 Gear pump cavitation reduction |
| 06/17/2009 | CN201258855Y Vehicle-mounted dirty oil recovery device |
| 06/17/2009 | CN201258854Y Cam type rotor pump |
| 06/17/2009 | CN201258853Y Ratchet type high-pressure single and double directional dual-purpose pump |
| 06/17/2009 | CN101460744A Combined gas and liquid pump |
| 06/17/2009 | CN100501163C Mixed-transmission double screw pump |
| 06/16/2009 | US7547202 Scroll compressor with capacity modulation |
| 06/11/2009 | WO2009072994A1 Volume expansion rotary piston machine |
| 06/11/2009 | US20090148324 Variable displacement vane pump |
| 06/10/2009 | EP2005001B1 Vane pump |
| 06/10/2009 | DE112007001884T5 Verstellflügelpumpe Variable displacement |
| 06/10/2009 | CN101454573A Vane machine |
| 06/10/2009 | CN101454572A Gear pump, in particular for a steering servo unit |
| 06/10/2009 | CN101451526A Variable displacement vane pump |
| 06/10/2009 | CN101451525A High efficiency roller rotary pump |
| 06/09/2009 | US7544052 Oil pump for an internal combustion engine |
| 06/04/2009 | WO2009042830A3 Insertable progressive cavity pump |
| 06/04/2009 | DE10255727B4 Planetengetriebe zur gesteuerten Drehmomentübertragung im Antriebsstrang eines Fahrzeugs Planetary gear for controlled torque transmission in the drive train of a vehicle |
| 06/04/2009 | DE102008058392A1 Verstellflügelpumpe Variable displacement |
| 06/04/2009 | DE102004052928B4 Pumpe, insbesondere Dickstoffpumpe Pump, particularly slurry pump |
| 06/03/2009 | EP2065561A2 Vane pump with tilting pad radial bearings |
| 06/03/2009 | EP2064442A2 Rotary fluid pressure device with modular multi-speed control mechanism |
| 06/03/2009 | EP1553298B1 Oil pump |
| 06/03/2009 | CN101446288A Translational piston rotary compressor |
| 06/03/2009 | CN101446287A Oil pump for engine |
| 06/03/2009 | CN101446286A Modular internal gear pump or modular motor |
| 06/03/2009 | CN101446285A Motor and pump assembly having improved sealing characteristics |
| 06/02/2009 | US7540728 Method of transforming a motion in a volume screw machine of rotary type and rotary screw machine |
| 06/02/2009 | US7540727 Capacity varying type rotary compressor |
| 05/28/2009 | US20090136371 Progressing cavity pump assembly and method of operation |
| 05/28/2009 | DE102008019925A1 Hydraulic gear machine has housing for supporting two gear wheels which are combined together and mounted in bearing bodies, and housing is closed at front side with lid |
| 05/27/2009 | EP2063126A2 Hydraulic cog wheel machine and method for sealing a hydraulic cog wheel machine |
| 05/27/2009 | EP2063125A1 Moineau pump |
| 05/27/2009 | CN201246304Y Planetary gear oil pump |
| 05/27/2009 | CN101443557A Variable displacement sliding vane pump |
| 05/27/2009 | CN101443556A Stator casing for eccentric worm pumps |
| 05/27/2009 | CN101443555A Rotary displacement pump with smaller radial dimensions |
| 05/27/2009 | CN101443554A 旋转活塞机械 Rotary piston machine |
| 05/27/2009 | CN101440805A Oil pump resonator |
| 05/27/2009 | CN101440803A Variable displacement pump |
| 05/27/2009 | CN101440802A Rotor pump |
| 05/27/2009 | CN100491730C Blade pump for hydraulic engine with pore plate centrifugal auxiliary pump |
| 05/27/2009 | CN100491729C Inner gearing pump |
| 05/26/2009 | US7537441 Gear pump and liquid injection apparatus |
| 05/26/2009 | US7537440 Scroll compressor with multiple isolated inlet ports |
| 05/22/2009 | WO2009064337A1 Friction drive pump for transfer cases, etc. |
| 05/22/2009 | WO2009062783A1 Pump assembly for synchronous pressurization of two fluid circuits |
| 05/22/2009 | WO2009062782A1 Bearing unit of a fluid pump |
| 05/22/2009 | WO2009012837A8 Method for producing a machine housing with a surface-hardened fluid chamber |
| 05/21/2009 | US20090132038 Rotary displacement pump with smaller radial dimensions |
| 05/21/2009 | US20090131210 Differential gear unit for motor vehicles comprising an active control mechanism for the driving force distribution |
| 05/21/2009 | US20090129959 Balance shaft module equipped with oil pump |
| 05/20/2009 | EP2060789A1 Screw pump and screw rotor |
| 05/20/2009 | EP2060740A1 Fluid metering and pumping device |
| 05/20/2009 | EP2060738A1 Oil pump resonator |
| 05/20/2009 | EP2059680A2 Two stage pressure regulation system for variable displacement hydraulic pumps |
| 05/20/2009 | EP2059672A2 Long life telescoping gear pumps and motors |
| 05/20/2009 | EP1738078B1 Stator for an eccentric screw pump or an eccentric screw motor according to the moineau principle |
| 05/20/2009 | DE102008013145A1 Ausgleichswellenmodul mit einer Ölpumpe Compensation shaft module with an oil pump |
| 05/20/2009 | DE102007054831A1 Pump e.g. vane-cell pump, for use in common-rail-injection system of vehicle, has stator section formed from base material, and larger part of particles of contact area exposed to contact surface and projectly arranged at matrix material |
| 05/20/2009 | DE102007054808A1 Pumpenbaugruppe zur synchronen Druckbeaufschlagung von zwei Fluidkreisen Pump assembly for synchronous pressurization of two fluid circuits |
| 05/20/2009 | CN201241826Y Vane type oil pump with vane provided on stator |
| 05/20/2009 | CN201241825Y High pressure and high flow vane type oil pump with porous oil inlet and outlet |
| 05/20/2009 | CN201241824Y Simple external gear pump |
| 05/20/2009 | CN201241823Y Multiple-loop self-lubricating gear pump for numerical control machine tool |
| 05/20/2009 | CN201241822Y Cycloid type fluid pump |
| 05/20/2009 | CN101435425A Novel tooth form of screw rod rotor of double-screw compressor |
| 05/19/2009 | US7534101 Pump with radial packing ring |
| 05/19/2009 | US7534096 Method and system for improving pump efficiency and productivity under power disturbance conditions |
| 05/14/2009 | US20090123319 "rotary piston pump comprising a pump housing and two double bladed rotary pistons" |
| 05/14/2009 | US20090123316 Gear pump |
| 05/14/2009 | US20090123314 Oil pump for an internal combustion engine |
| 05/14/2009 | US20090123302 Screw compressor |
| 05/14/2009 | US20090120507 Fluid metering and pumping device |
| 05/13/2009 | EP2058519A1 Rotary expanding or compressing mechanism provided in fluid channel with blades for traversing shaft |
| 05/13/2009 | CN201236799Y Translational rotating compression device |
| 05/13/2009 | CN201236796Y Magnetically-actuated gear pump |
| 05/13/2009 | CN101429936A Down-hole double-screw type oil gas multi-phase mixed pump |
| 05/13/2009 | CN100487246C Constant breath curved line double-stator axial direction shuttle block pump |
| 05/13/2009 | CN100487245C Fluid conveying machine employing elliptic rotation and compression principle |
| 05/13/2009 | CN100487244C Low input torque rotor for vane pump |
| 05/12/2009 | US7530800 Rotary drivehead for downhole apparatus |
| 05/12/2009 | CA2550038C Floating dam positive displacement pump |
| 05/12/2009 | CA2312589C Drilling motor that operates pursuant to the moineau principle for drilling deep holes |
| 05/07/2009 | WO2009056200A1 Moineau pump |
| 05/07/2009 | US20090114047 Gear Assembly |
| 05/07/2009 | DE112007000514T5 Flügelpumpe mit reduziertem Rotoranordnungsdurchmesser Vane pump rotor assembly with reduced diameter |
| 05/06/2009 | EP2055954A1 Three-throw gear pump |
| 05/06/2009 | CN201232632Y Multifunctional rotary ball pump |
| 05/06/2009 | CN201232631Y Oil pump for gear box |
| 05/06/2009 | CN101427028A Pump unit |
| 05/06/2009 | CN101424264A Dual rotor rotary type displacement pump |
| 05/05/2009 | CA2629278C Stuffing box for progressing cavity pump drive |
| 04/30/2009 | WO2009053188A1 Internal gear pump for a braking system |
| 04/30/2009 | WO2009010047A4 Spur gear-type recirculation pump |
| 04/30/2009 | US20090110582 Vane machine |
| 04/30/2009 | US20090110578 Progressing cavity pump with split stator |
| 04/30/2009 | DE102007051352A1 Hydraulic gear wheel machine i.e. external gear wheel machine such as external gear wheel motor, for generating and converting of hydraulic energy, has actuators adjusting opening independent of operating pressure during machine operation |