| Patents for F04C 2 - Rotary-piston machines or pumps (14,296) |
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| 11/06/2013 | CN101512158B 齿轮泵 Gear pumps |
| 11/05/2013 | US8573955 Scroll compressor with noise reducing discharge opening |
| 10/31/2013 | WO2013162477A1 A vane mechanism |
| 10/31/2013 | WO2013162427A1 Multi-stage vane pump |
| 10/31/2013 | WO2013159153A1 Downhole motor with concentric rotary drive system |
| 10/31/2013 | US20130287616 Progressing cavity pump/motor |
| 10/31/2013 | DE102012207079A1 Gear wheel machine e.g. pump, has housing comprising resilient wall section arranged in region of tip cylinder diameter of assigned gear wheel and made of elastomer material, and gear wheels that are combined with one another |
| 10/31/2013 | DE102012207078A1 Zahnradmaschine mit einer Axialdichtung, die sich in den Bereich der radialen Außenoberfläche des zugeordneten Lagerkörpers erstreckt Gear machine with an axial seal, which extends into the region of the radial outer surface of the associated bearing body |
| 10/31/2013 | DE102005056343B4 Ölpumpenaufbau Oil pump assembly |
| 10/30/2013 | EP2657525A2 Gear machine with an axial seal stretching into the area of radial exterior surface of the correponding bearing support |
| 10/30/2013 | EP2655887A2 Axial disc and gear pump with axial disc |
| 10/30/2013 | EP2655110A1 Controlled gerotor actuated pre-trans parallel hybrid |
| 10/30/2013 | CN203257671U Three-screw pump for conveying high-temperature medium |
| 10/30/2013 | CN203257670U Double shaft external lubrication melt pump |
| 10/30/2013 | CN103380300A A variable displacement lubricant pump with a pressure control valve having a preload control arrangement |
| 10/30/2013 | CN103375399A Double-kinetic-energy sliding piece swinging type controllable flow pump |
| 10/30/2013 | CN101813087B Vortex fluid machinery |
| 10/29/2013 | CA2593673C Pump, in particular a slurry pump |
| 10/24/2013 | WO2013157730A1 Vane-type power apparatus for implementing multiple purposes |
| 10/24/2013 | WO2013157306A1 Rotor for pump, and internal gear pump using same |
| 10/24/2013 | WO2013045302A3 Displacement pump |
| 10/24/2013 | WO2013000745A3 Micropump, bearing element for a micropump, and working method |
| 10/24/2013 | US20130280118 Vane pump |
| 10/24/2013 | DE102012206699A1 Gear machine, particularly external gear pump or external gear motor, has housing provided on outer surface with trough-like depression, and a low pressure connection is arranged at deepest point of trough-like depression |
| 10/24/2013 | DE102012206698A1 Hydrostatic positive-displacement engine, has housing comprising housing portions extending in plane separating surface abutting each other, and plane separating surface incorporating rotational axes of gear wheels |
| 10/24/2013 | DE102012206520A1 Vane machine has control element having bearing surfaces with axial inlet and outlet openings which are in fluid communication with radial inlet and outlet openings of cam portions through communicating passages |
| 10/23/2013 | CN203248360U Elastic sheet type vane pump |
| 10/23/2013 | CN203248359U Long-life gear oil pump |
| 10/23/2013 | CN203248358U Energy-saving variable-speed pump |
| 10/23/2013 | CN103370540A Single-shaft eccentric screw pump |
| 10/23/2013 | CN103370539A Semi-plugged star gerotor and method of assembling the same |
| 10/23/2013 | CN103362799A Transmission structure of gear pump |
| 10/23/2013 | CN103362798A High-efficiency large-flow brushless diesel oil injector |
| 10/22/2013 | US8562319 Screw compressor having slide valve with inclined end face |
| 10/22/2013 | US8562317 Scroll expansion machine with air flow passage around outer periphery of sealing surface |
| 10/17/2013 | WO2013102772A3 Gaseous medium forwarding unit with circulating blade |
| 10/17/2013 | WO2013045152A3 Internal gear pump |
| 10/17/2013 | DE10231197B4 Schmiermittelpumpanlage Lubricant pumping plant |
| 10/16/2013 | CN203239569U Square blocking protective cover of screw pump drive device |
| 10/16/2013 | CN203239568U Improved pawl shaft structure of anti-reversion mechanism of screw pump drive device |
| 10/16/2013 | CN203239567U Improved anti-reversion pawl structure of screw pump drive device |
| 10/16/2013 | CN203239566U Improved limiting rod structure of anti-reversion taper sleeve plate of screw pump drive device |
| 10/16/2013 | CN203239562U High power gear-driven infusion pump |
| 10/16/2013 | CN203239561U Screw pump with single-core submersible oil cable and high-power stepping motor |
| 10/16/2013 | CN203239560U Oil supplementing pump of internal-meshing cycloid gear |
| 10/16/2013 | CN203239559U Internally-engaging gear pump |
| 10/15/2013 | US8556922 Motor assembly for a powered surgical instrument |
| 10/15/2013 | US8556609 Geared hydraulic apparatus |
| 10/15/2013 | US8556608 Rotor drive mechanism and pump apparatus including the same |
| 10/15/2013 | US8556606 Water injection type screw fluid machine |
| 10/15/2013 | US8556603 Progressing cavity pump adapted for pumping of compressible fluids |
| 10/10/2013 | WO2013152112A1 Rotary blower with variable inlet port geometry |
| 10/10/2013 | WO2013149750A1 Metering pump made of plastic |
| 10/10/2013 | DE102012219841A1 Elektrische Pumpe und Verfahren zur Herstellung einer elektrischen Pumpe Electric pump and method for producing an electric pump |
| 10/10/2013 | DE102012205568A1 Dosierpumpe aus Kunststoff Dosing pump made of plastic |
| 10/10/2013 | DE102012205406A1 Hydrostatische Verdrängermaschine mit gekrümmter Eingriffslinie und Flankenlinienrücknahme Hydrostatic displacement curved line of action and helix withdrawal |
| 10/09/2013 | EP2647845A2 Hydrostatic displacement machine with curved path of contact and edge line withdrawal |
| 10/09/2013 | EP2647793A1 Hydraulic motor |
| 10/09/2013 | EP2646690A1 Rotary pump with a vane provided in each pump outlet |
| 10/09/2013 | EP2646689A2 Internal gear pump |
| 10/09/2013 | CN203230581U Vertical type single-screw pump |
| 10/09/2013 | CN203230580U 污水提升装置 Sewage lifting unit |
| 10/09/2013 | CN203230579U Pulp feed pump of hole sealing pump for coal mine |
| 10/09/2013 | CN203230578U Novel cycloid rotor for pump |
| 10/09/2013 | CN103348141A Magnetically driven pump arrangement having micropump with forced flushing, and operating method |
| 10/08/2013 | CA2596520C Crescent gear pump with novel rotor set |
| 10/03/2013 | WO2013146178A1 Oil supply device and oil supply method |
| 10/03/2013 | WO2013146177A1 Vane pump |
| 10/03/2013 | WO2013143741A1 Internal-gear pump |
| 10/03/2013 | WO2013143535A2 Pin joint for an eccentric screw pump |
| 10/03/2013 | WO2013143479A1 Oil pump, engine cover and engine comprising the same |
| 10/03/2013 | US20130259731 Simple rotation engine with variable compression and high gas flow |
| 10/02/2013 | EP2643592A1 Variable displacement lubricant pump |
| 10/02/2013 | EP2643589A2 Pumps and pump-heads with separately removable field-serviceable portion |
| 10/02/2013 | EP2643541A1 Submersible progressive cavity pump driver |
| 10/02/2013 | DE102012205007A1 Innenzahnradpumpe Internal gear pump |
| 10/02/2013 | CN203223377U Improved hydraulic gear pump |
| 10/02/2013 | CN103339409A 传动单元 Drive unit |
| 10/02/2013 | CN103339381A Internal gear pumps for a hydraulic vehicle braking system |
| 10/02/2013 | CN103338989A Double internal gear wheel pump |
| 10/02/2013 | CN103334926A Rotating stator type double-acting variable vane pump |
| 10/02/2013 | CN103334925A Cooling-type steering pump |
| 10/02/2013 | CN103334924A High-duty pump combining vane pump with gear pump |
| 10/02/2013 | CN103334923A Screw pump |
| 10/01/2013 | US8545200 Variable displacement oil pump |
| 09/26/2013 | WO2013141129A1 Variable-capacity vane pump |
| 09/26/2013 | WO2013141010A1 Variable-capacity vane pump |
| 09/26/2013 | WO2013141001A1 Variable-capacity vane pump |
| 09/26/2013 | WO2013140305A1 Variable displacement pump with double eccentric ring and displacement regulation method |
| 09/26/2013 | WO2013140304A1 Variable displacement rotary pump and displacement regulation method |
| 09/26/2013 | WO2012152924A3 Apparatus for sealing off a pump space of a rotary piston pump, and rotary piston pump having same |
| 09/26/2013 | WO2012149931A3 Variable displacement pump |
| 09/26/2013 | US20130251584 Variable displacement pump |
| 09/26/2013 | US20130251581 Two-Spindle Pump of Single-Flow Construction |
| 09/26/2013 | US20130251574 Scroll compressor with captured thrust washer |
| 09/26/2013 | US20130251572 Methods and Apparatus for Enhancing Elastomeric Stator Insert Material Properties with Radiation |
| 09/26/2013 | US20130251571 Vane Pump |
| 09/26/2013 | US20130251570 Variable Displacement Variable Pressure Vane Pump System |
| 09/26/2013 | US20130251568 Piloted Scroll Compressor |
| 09/26/2013 | US20130251567 Scroll Compressor Counterweight With Axially Distributed Mass |