| Patents for F04C 2 - Rotary-piston machines or pumps (14,296) |
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| 11/26/2009 | WO2009123489A3 Device with rotary pistons that can be used as a compressor, a pump, a vacuum pump, a turbine, a motor and as other driving and driven hydraulic-pneumatic machines |
| 11/26/2009 | US20090291010 Vane pump |
| 11/26/2009 | US20090291009 Rotary piston machine |
| 11/26/2009 | US20090291008 Variable displacement vane pump |
| 11/26/2009 | US20090291000 Variable displacement vane pump |
| 11/26/2009 | US20090288818 Passive gas separator for progressing cavity pumps |
| 11/26/2009 | CA2721877A1 Vane pump |
| 11/25/2009 | EP2123914A1 Oil pump rotor |
| 11/25/2009 | EP2122175A1 Gear wheel pump |
| 11/25/2009 | EP2122174A1 Integrated internal gear pump with an electric motor |
| 11/25/2009 | EP2122173A1 Lubricating pinion and lubricating device |
| 11/25/2009 | CN201351603Y Balanced type axial sliding vane pump |
| 11/25/2009 | CN201351602Y Spiral gear oil pump unit used for ship |
| 11/25/2009 | CN201351601Y Cycloidal pump used for automatic speed changer of car |
| 11/25/2009 | CN101586561A High pressure gear oil pump |
| 11/25/2009 | CN101586523A Noncircular planetary gear hydraulic motor |
| 11/25/2009 | CN101586474A Vane type continuous rotating cylinder |
| 11/25/2009 | CN101586473A Cryogenic-fluid energy conversion device |
| 11/24/2009 | US7621729 Multistage compression type rotary compressor |
| 11/24/2009 | US7621255 Toroidal engine method and apparatus |
| 11/24/2009 | US7621254 Internal combustion engine with toroidal cylinders |
| 11/19/2009 | WO2009139658A1 Progressive cavity hydraulic machine |
| 11/19/2009 | WO2009115355A3 Fuel pump |
| 11/19/2009 | WO2009087475A3 High temperature progressive cavity motor or pump component and method of fabrication |
| 11/19/2009 | US20090285709 Vane pump |
| 11/19/2009 | US20090285707 Variable Capacity Pump with Dual Springs |
| 11/19/2009 | DE102006021897B4 Statormantel für Exzenterschneckenpumpen Stator cavity pumps for |
| 11/19/2009 | CA2719121A1 Progressive cavity hydraulic machine |
| 11/18/2009 | EP2118489A1 Cartridge -type single-screw pump and dye-meter equipped with such pump |
| 11/18/2009 | CN201347860Y Rotor clamp of screw compressor |
| 11/18/2009 | CN201347859Y Roller rotor pump |
| 11/18/2009 | CN201347858Y Efficient roller rotor pump |
| 11/18/2009 | CN201347857Y Double-power magnetically-driven pump |
| 11/18/2009 | CN201347856Y Novel horizontal-type single-suction two-screw pump |
| 11/18/2009 | CN201347855Y Rotor and main/auxiliary shaft structure of rotor pump |
| 11/18/2009 | CN101581396A Motor oil pump |
| 11/18/2009 | CN101581301A Vane pump/motor |
| 11/18/2009 | CN101581300A Ball plug hydraulic pump for flow distribution of mandrel |
| 11/17/2009 | US7618247 Progressive staged flow to precompress the pump internal volume/volumes to be displaced |
| 11/17/2009 | US7618246 Eccentric screw pump having conical sealing surfaces |
| 11/12/2009 | WO2009135714A1 Internal gear pump |
| 11/12/2009 | WO2009135587A2 Pump |
| 11/12/2009 | US20090280021 Hydraulic machine |
| 11/12/2009 | DE102008001703A1 Innenzahnradpumpe Internal gear pump |
| 11/11/2009 | EP2018229B1 Coating device and associated operating method |
| 11/11/2009 | EP1789682B1 Hybrid pump |
| 11/11/2009 | CN201344231Y Power takeoff device for oil pressure gear pump |
| 11/11/2009 | CN201344124Y Multifunctional low-noise bidirectional gear pump |
| 11/11/2009 | CN101576079A Screw gear form of double screw pump |
| 11/11/2009 | CN101576078A Engine oil pump device |
| 11/11/2009 | CN101576077A Vane pump |
| 11/10/2009 | US7614863 Rotary pump provided with an axially movable blade |
| 11/10/2009 | US7614858 Variable capacity vane pump with force reducing chamber on displacement ring |
| 11/05/2009 | WO2009113804A3 Fluid pump |
| 11/05/2009 | DE102008021919A1 Eccentric screw pump, has spacer ring arranged between stator and connection piece, where spacer ring is detachable for disassembly of stator and attached under interconnection of flat seals to stator and/or to connection piece |
| 11/05/2009 | DE102008021814A1 Screw spindle pump e.g. single flow screw spindle pump, for conveying fluids, has housing in which spindle is accommodated, and establishing unit establishing fluid connection between pressure chambers of different pressures |
| 11/05/2009 | DE102006011609B4 Drehschieberpumpe Rotary vane pump |
| 11/04/2009 | EP2113667A1 Single-shaft eccentric screw pump |
| 11/04/2009 | EP2113355A1 A method and a device for plasticizing and transporting polymer material based on elongation rheology |
| 11/04/2009 | EP1931879B1 Vane cell pump |
| 11/03/2009 | US7611345 Structure for preventing axial leakage in scroll compressor |
| 11/03/2009 | US7611344 Sealing tabs on orbiting scroll |
| 11/03/2009 | US7611343 Multistage compression type rotary compressor |
| 11/03/2009 | US7611342 Multistage compression type rotary compressor |
| 11/03/2009 | US7611341 Capacity varying type rotary compressor |
| 10/29/2009 | WO2009130433A1 Pump with filling slots |
| 10/29/2009 | WO2009129776A1 Feed apparatus for screw machines |
| 10/29/2009 | WO2009129666A1 A automobile hydraulic transmission and differential speed system and a variable volume gear pump |
| 10/29/2009 | WO2009129588A1 System for construction of pumps, compressors and rotary engine composed of two rotors with one, two or more displacer's each, that move themselves in the same direction at speeds that are varying and alternativly opposite each other |
| 10/29/2009 | US20090269234 Impeller |
| 10/29/2009 | US20090269233 Variable displacement vane pump |
| 10/28/2009 | EP2112379A2 Variable displacement vane pump with enhanced discharge port |
| 10/28/2009 | EP2112378A2 Variable Displacement Vane Pump |
| 10/28/2009 | EP2021633B1 Vane machine |
| 10/28/2009 | CN101568698A Positive-displacement machine design (variants) |
| 10/28/2009 | CN101566151A Variable displacement vane pump |
| 10/28/2009 | CN101566150A Variable displacement vane pump with enhanced discharge port |
| 10/28/2009 | CN101566149A Master-auxiliary vane pump and stator decompression method |
| 10/28/2009 | CN101566148A Boosting and reclaiming combined pump with asymmetrical cavity |
| 10/28/2009 | CN101566147A Volume type five-screw pump for delivering oil |
| 10/28/2009 | CN100554690C Rotor of hydraulic pump |
| 10/28/2009 | CN100554689C Bidirectional constant flux gear pump |
| 10/28/2009 | CN100554688C Compact eccentric screw pump |
| 10/27/2009 | US7607907 Roller vane pump |
| 10/27/2009 | US7607906 Gear pump arrangement with erosion resistant insert |
| 10/27/2009 | US7607905 Fluid compressing system having oil-releasing port being between oil chamber and oil-adjusting tank for returning oil |
| 10/27/2009 | US7607903 Stator tube removal and installation device |
| 10/27/2009 | US7607902 Closed compressor and refrigerating cycle apparatus |
| 10/25/2009 | CA2664067A1 Variable displacement vane pump with enhanced discharge port |
| 10/22/2009 | WO2009127786A1 Rotary combustion engine and hydraulic motor |
| 10/22/2009 | WO2009127281A1 Vane of a vane pump or a vane compressor |
| 10/22/2009 | DE102008019440A1 Flügel einer Flügelzellenpumpe oder eines Flügelzellenkompressors Wings of a vane pump or a vane compressor |
| 10/22/2009 | CA2721178A1 Drill motor assembly |
| 10/22/2009 | CA2719377A1 Rotary combustion engine and hydraulic motor |
| 10/21/2009 | EP2110555A2 Variable displacement vane pump |
| 10/21/2009 | EP2024641B1 Combined gas and liquid pump |
| 10/21/2009 | CN201330701Y Grouting pump |
| 10/21/2009 | CN101560975A Variable displacement vane pump |
| 10/21/2009 | CN101560974A Quantitative filling pump with accurate quantitation and easy cleaning |
| 10/21/2009 | CN101560973A Double-cycloid rotor variable pump |