| Patents for F04C 2 - Rotary-piston machines or pumps (14,296) |
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| 03/07/2013 | WO2013032616A2 Downhole motors and pumps with improved stators and methods of making and using same |
| 03/07/2013 | WO2013032367A2 Rotary vane machine |
| 03/07/2013 | WO2013030025A2 Rotary displacement pump for pumping flowable viscous materials |
| 03/07/2013 | WO2013029662A1 Lubricant vane pump |
| 03/07/2013 | WO2013007233A4 Gear ring pump |
| 03/07/2013 | WO2011154237A3 Rotary vane pump |
| 03/07/2013 | WO2011128218A3 Gear pump |
| 03/07/2013 | US20130058820 Net-displacement control of fluid |
| 03/07/2013 | US20130058808 Symmetrical vane pump apparatus and method |
| 03/07/2013 | DE112011101718T5 Rotationsvorrichtung mit einer Dichtungsstruktur Rotation device having a sealing structure |
| 03/06/2013 | EP2565454A1 Rotary displacement pump for pumping flowable materials of high viscosity |
| 03/06/2013 | EP2565376A2 Electric pump unit |
| 03/06/2013 | CN202768391U Forked type composite-sliding plate rotor pump |
| 03/06/2013 | CN102959245A 齿轮泵 Gear pumps |
| 03/06/2013 | CN102953988A Improved screw of screw pump |
| 03/06/2013 | CN102953982A Vane pump |
| 03/06/2013 | CN102953981A Oil pump rotor |
| 03/06/2013 | CN102953980A Oil pump assembly |
| 03/06/2013 | CN102953979A Internal gearing oil pump |
| 03/06/2013 | CN101446287B Oil pump for engine |
| 03/05/2013 | US8388328 Rotary pump and brake device in which rotary pump is provided |
| 02/28/2013 | WO2013028015A2 Oil-free air compressor |
| 02/28/2013 | US20130052073 Vane pump |
| 02/28/2013 | US20130052071 Vane pump |
| 02/28/2013 | US20130052058 Electric pump unit |
| 02/28/2013 | DE10333564B4 Öldichtungsanordnung Oil seal assembly |
| 02/28/2013 | DE10104222B4 Bremsvorrichtung mit einer Rotationspumpe Brake device with a rotary pump |
| 02/27/2013 | EP2562420A2 Variable output pump |
| 02/27/2013 | EP2561230A2 Vane cell pump |
| 02/27/2013 | CN202756239U Anti-wear vane and high-pressure anti-wear pin type vane pump |
| 02/27/2013 | CN202756238U Energy-saving type vane pump with overflow valve |
| 02/27/2013 | CN202756237U Steering oil pump |
| 02/27/2013 | CN202756236U Paste material high-pressure delivery pump |
| 02/27/2013 | CN202756169U Bidirectional pump tide potential energy power generating device |
| 02/27/2013 | CN102943756A Vane pump or motor with no friction produced between blade and rotor side wall |
| 02/27/2013 | CN102943755A Rotor pump |
| 02/26/2013 | US8382462 Vane pump with circulating oil supply passage |
| 02/26/2013 | US8382461 Vane cell pump and impeller having a chamber wall with a projecting web |
| 02/26/2013 | CA2565352C Compressor |
| 02/25/2013 | CA2787730A1 Spray system for application of adhesive to a stator tube |
| 02/21/2013 | WO2012122321A3 Bearing / gearing section for a pdm rotor / stator |
| 02/21/2013 | WO2012052240A3 Pendulum-slide cell pump |
| 02/21/2013 | DE102012212986A1 External gear pump for liquids or elastic fluids, particularly hydraulic medium, such as oil, comprises two mutually meshing outer gears and additional displacement body arranged in displacement hull construction |
| 02/20/2013 | EP2558724A2 Gear pump with continuous variable output flow rate |
| 02/20/2013 | CN202746203U Transmission type gear pump of rectangular spline |
| 02/20/2013 | CN202746202U Gear pump with improved volumetric efficiency |
| 02/20/2013 | CN202746199U 液压控制机构 Hydraulic control mechanism |
| 02/20/2013 | CN202746195U Gear steering pump with pilot overflow valve |
| 02/20/2013 | CN202746194U Gear pump for conveying glass cement |
| 02/20/2013 | CN202746193U Direct-insertion type gear pump |
| 02/20/2013 | CN202746192U Front cover connecting type arc spiral gear pump |
| 02/20/2013 | CN202746191U High-pressure large-output-volume gear pump |
| 02/20/2013 | CN202746190U High-pressure gear pump |
| 02/20/2013 | CN202746189U Double-bracing rotor pump with parallel sealing surfaces |
| 02/20/2013 | CN202746188U Oil feed pump with wear-resistant inner gear |
| 02/20/2013 | CN102939436A Fluid energy transfer device |
| 02/20/2013 | CN102937091A Gear double-teeth water pump |
| 02/20/2013 | CN102094815B Volumetric multifunctional constant-pressure pump |
| 02/19/2013 | US8376724 Gear pump enabling efficient pump capacity change |
| 02/14/2013 | US20130039795 Shaft rotating double-stator multi-speed motor with curves of constant width |
| 02/14/2013 | US20130039794 Gear pump with continuous variable output flow rate |
| 02/13/2013 | EP2556256A2 Rotary piston pump and method for operating a rotary piston pump |
| 02/13/2013 | EP2556255A2 Contact element for rotary piston pump |
| 02/13/2013 | CN202732339U Safety valve part for gear oil pump |
| 02/13/2013 | CN202732335U Fluid pressurization transmitting device |
| 02/13/2013 | CN202732334U Gear oil pump |
| 02/13/2013 | CN202732333U Cutting submersible screw pump |
| 02/13/2013 | CN202732332U Internal engagement gear pump |
| 02/13/2013 | CN1606659B Screw compressor with reduced leak path |
| 02/13/2013 | CN102933849A Cam bearing flow control for rotating cam ring vane pump |
| 02/13/2013 | CN102927003A Special gear pump |
| 02/13/2013 | CN102927002A High-pressure gear pump |
| 02/13/2013 | CN102927001A Method by utilizing switch reluctance motor speed regulating system for screw pump oil extraction |
| 02/13/2013 | CN102927000A Self-sealing gear pump |
| 02/13/2013 | CN102926999A Double internal thread air bag balance gear pump |
| 02/13/2013 | CN102926998A Internal and external thread self-balancing gear pump |
| 02/13/2013 | CN102926997A Flange internal thread conical spring gear pump |
| 02/13/2013 | CN102926996A Double external thread spoke spring gear pump |
| 02/13/2013 | CN102926995A Bi-rotor claw-type high current pump |
| 02/13/2013 | CN102926994A Oil-supplementing pump with anti-friction coating layers |
| 02/13/2013 | CN101636586B Lubricating pinion and lubricating device |
| 02/12/2013 | US8371834 Anti-self rotation mechanism of a scroll fluid machine |
| 02/07/2013 | WO2013019948A1 Piston with replaceable and/or adjustable surfaces |
| 02/07/2013 | WO2013019306A1 A stator of a gerotor device and a method for manufacturing roller pockets in a stator of a gerotor device |
| 02/07/2013 | US20130034463 Gear Pump |
| 02/07/2013 | US20130034460 Variable Displacement Vane Pump |
| 02/07/2013 | DE102012213416A1 Flügelzellenpumpe mit verstellbarer Durchflussmenge A vane pump with adjustable flow rate |
| 02/07/2013 | DE102010034032B4 Pumpe zum Fördern von abbindendem Material Pump for pumping setting material |
| 02/06/2013 | EP2554844A1 Compressor |
| 02/06/2013 | CN202718862U Vane pump rotor with controllable telescopic vanes |
| 02/06/2013 | CN202718861U Impulse wave gear pump |
| 02/05/2013 | US8366424 Rotary fluid machine with reverse moment generating mechanism |
| 02/05/2013 | US8366381 Rotary pump with hydrodynamically suspended impeller |
| 01/31/2013 | WO2013015150A1 Oil pressure circuit for transmissions |
| 01/31/2013 | WO2012162774A3 A process for manufacturing an oil-pump cover and a cover |
| 01/31/2013 | WO2012112378A3 Blood flow assist systems |
| 01/31/2013 | WO2012038199A3 Pump comprising an electric motor |
| 01/31/2013 | WO2011131598A3 Vane cell pump |
| 01/31/2013 | US20130028779 Pump |
| 01/31/2013 | DE102012210453A1 Verstellpumpe Variable |