| Patents for F04C 2 - Rotary-piston machines or pumps (14,296) |
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| 07/03/2013 | CN203035540U Externally arranged single-bearing lubricating melt pump |
| 07/03/2013 | CN103190073A Electric delivery pump and method for operating an electric delivery pump |
| 07/03/2013 | CN103189654A Compressor seal assembly |
| 07/02/2013 | US8475150 Internal gear pump for a brake system |
| 07/02/2013 | US8475149 Scroll fluid machine having multiple discharge ports |
| 07/02/2013 | US8475148 Scroll compressor having through holes with a set depth |
| 06/27/2013 | WO2012066483A3 Magnetically driven pump arrangement having a micropump with forced flushing, and operating method |
| 06/27/2013 | US20130164163 Variable displacement pump |
| 06/27/2013 | DE102012021490A1 Verstellpumpe Variable |
| 06/27/2013 | DE102011121843A1 Gear pump has cap that is provided for closing an opening of holes in fluid-tight manner |
| 06/27/2013 | DE102011089936A1 Housing structure for gear pump used for fuel delivery to fuel system in e.g. motor car, has insert portion provided for forming inner housing portion which is integral with cup-shaped outer portion to form remaining of housing portion |
| 06/27/2013 | DE102011089743A1 Electromotor integrated pump i.e. electric supply pump, for use in high pressure injection system of motor car for conveying fuel to high pressure pump, has sealing casing comprising plate and/or film, where stator is surrounded by casing |
| 06/27/2013 | DE102011089609A1 Innenzahnradpumpe Internal gear pump |
| 06/27/2013 | DE102011056849A1 Displacement pump i.e. vane pump, for power steering of motor car, has printed circuit boards arranged between control plates and rotor in addition to curve ring, and including through holes, which flush with supply kidneys and/or channel |
| 06/26/2013 | EP2607683A2 Hydrostatic rotary-cylinder engine |
| 06/26/2013 | EP2606235A2 Vane pump |
| 06/26/2013 | EP2606234A2 Rotary piston pump |
| 06/26/2013 | CN203023049U Improved screw pump screw |
| 06/26/2013 | CN203023047U Axisymmetric cambered rotary variable displacement pump |
| 06/26/2013 | CN203023046U Axisymmetric cambered rotary variable displacement pump |
| 06/26/2013 | CN203023045U Novel gear pump |
| 06/26/2013 | CN103180612A Lubricant valve for oil pumps of internal combustion engines |
| 06/26/2013 | CN103174643A Improved gear pump |
| 06/26/2013 | CN103174642A High-power stepping motor screw pump of single-core submersible cable |
| 06/26/2013 | CN103174641A Integrated fully-sealed type refrigeration gear pump |
| 06/20/2013 | WO2013089203A1 Oil pump rotor |
| 06/20/2013 | WO2013086623A1 Horizontal and vertical well fluid pumping system |
| 06/20/2013 | WO2012089436A3 Internal gear pump |
| 06/20/2013 | WO2012072492A3 Internal gear pump |
| 06/20/2013 | WO2012066026A3 Rotary piston pump and housing half-shell for same |
| 06/20/2013 | US20130156625 Pump System |
| 06/20/2013 | DE102012111502A1 Pump e.g. electrically driven rotary vane pump for conveying medium e.g. fuel, has pump structure that is moved, such that separating element is arranged in sealing contact with outer surface of pump structure |
| 06/20/2013 | CA2823495A1 Horizontal and vertical well fluid pumping system |
| 06/19/2013 | EP2604790A2 Multi-discharge hydraulic vane pump |
| 06/19/2013 | CN203009294U Oil-leakage-proof hydraulic pump structure |
| 06/19/2013 | CN203009289U Oil pump |
| 06/19/2013 | CN203009286U Synchronous gyration type oil-gas multiphase pump |
| 06/19/2013 | CN203009285U Special gear pump |
| 06/19/2013 | CN203009284U Double-stator threaded rod bushing pair with equal wall thickness |
| 06/19/2013 | CN103161727A Electric oil pump for hybrid vehicle |
| 06/19/2013 | CN101968053B Variable displacement pump having rotating cam ring |
| 06/19/2013 | CN101813086B Positive displacement pump and fluid machinery with said positive displacement pump |
| 06/19/2013 | CN101275567B Powder metal scrolls |
| 06/18/2013 | US8465269 Dry vacuum pump including a lubricating fluid sealing device and a centrifuge element equipping such a device |
| 06/17/2013 | DE202013102506U1 Innenzahnradmaschine mit Schrägbohrungen zur Verbindung hydrostatischer Lager für ein Hohlrad mit einem Druck-Hauptkanal Internal gear pump with slanted holes for connecting hydrostatic bearing for a gear with a merge main channel |
| 06/17/2013 | DE202013102481U1 Lenkungsölpumpe für Fahrzeuge Steering oil pump for vehicles |
| 06/13/2013 | WO2013084542A1 Fluid-pressure apparatus |
| 06/13/2013 | WO2013083542A2 Vane pump and vane turbine |
| 06/13/2013 | WO2012071440A3 Pumps and pump-heads with separately removable field-serviceable portion |
| 06/13/2013 | US20130149180 Internal gear pump |
| 06/12/2013 | EP2602484A2 Internal gear pump |
| 06/12/2013 | EP2602428A1 Rotary positive displacement pump with fixed shafts and rotating sleeves |
| 06/12/2013 | CN202991474U Submerged oil ball plug pump |
| 06/12/2013 | CN202991473U Axial symmetric curved surface rotating positive displace pump |
| 06/12/2013 | CN202991472U Axial symmetric curved surface rotating positive displace pump |
| 06/12/2013 | CN202991471U Axial symmetric curved surface rotating positive displace pump |
| 06/12/2013 | CN202991470U Double-rotor blade-type hydraulic pump with lateral walls of rotors free of friction from blades |
| 06/12/2013 | CN202991469U Birotor vane pump with vanes not generating circumferential friction on side wall of birotor |
| 06/12/2013 | CN202991468U Volume circular increase and decrease device of closed cavity of each single body of tri-rotor vane pump or vane motor |
| 06/12/2013 | CN202991467U Double-flange-spoke spring gear pump |
| 06/12/2013 | CN202991466U Twin-screw glue pump |
| 06/12/2013 | CN202991465U High-pressure fluid mixed transport pump provided with backlash-free gear pair |
| 06/12/2013 | CN202991464U Water pump of pesticide sprayer |
| 06/12/2013 | CN202991463U Stator tandem type single-screw pump |
| 06/12/2013 | CN202991462U Oil recharging pump with antifriction coatings |
| 06/12/2013 | CN103154519A Rotary displacement pump for pumping solids emulsions, especially liquid explosives |
| 06/12/2013 | CN103147981A Abrasion-resistant device of rotor pump |
| 06/12/2013 | CN103147977A Torsion spring vane pump for oil well lifting |
| 06/12/2013 | CN103147976A Internal gear pump |
| 06/12/2013 | CN101886626B Oil pump for a vehicle |
| 06/11/2013 | US8459973 Vane pump having an oil supply passage communicating with a gas passage in the stopping state |
| 06/11/2013 | US8459972 Bi-rotational hydraulic motor with optional case drain |
| 06/11/2013 | US8459971 Scroll compressor with balancer and oil passages |
| 06/06/2013 | WO2013032616A4 Downhole motors and pumps with improved stators and methods of making and using same |
| 06/06/2013 | WO2011158011A3 Stator for progressive cavity pump/motor |
| 06/06/2013 | US20130142685 Rotary device and a method of designing and making a rotary device |
| 06/06/2013 | DE112007001884B4 Verstellflügelpumpe Variable displacement |
| 06/06/2013 | DE102011087749A1 Internal gear pump e.g. feed pump, for use in fuel conveying device of internal combustion engine of aircraft, has two pairs of sealing sections attached to respective gear wheels and coaxially displaceable relative to each other |
| 06/05/2013 | EP2600004A2 Variable oil pump |
| 06/05/2013 | EP2600002A1 Electric pump |
| 06/05/2013 | CN202971181U Pump body structure for vane pump |
| 06/05/2013 | CN202971178U Step-blade type hydraulic machine |
| 06/05/2013 | CN202971177U Vane hydraulic pump |
| 06/05/2013 | CN202971176U Dual-variable vane pump |
| 06/05/2013 | CN202971175U Duplicate gear pump |
| 06/05/2013 | CN202971174U Micropump |
| 06/05/2013 | CN202971173U Novel gear pump |
| 06/05/2013 | CN202971172U Improved gear pump |
| 06/05/2013 | CN202971171U Gear pump |
| 06/05/2013 | CN202971170U Special three-screw pump for immersed lubrication |
| 06/05/2013 | CN202971169U Axial pressure compensation structure used in hydraulic device |
| 06/05/2013 | CN103140682A Rotary piston pump |
| 06/05/2013 | CN103133344A Synchronal rotary oil-gas multiphase pump |
| 06/05/2013 | CN103133343A Improved gear pump |
| 06/05/2013 | CN103133342A Gear pump with novel structure |
| 06/05/2013 | CN103133341A High-pressure two-way rotary gear pump |
| 06/05/2013 | CN101970881B Gerotor and method of assembling the same |
| 06/05/2013 | CN101865021B Active clearance compensation type cycloid pump/ motor device |
| 06/05/2013 | CN101842595B Screw pump |
| 06/04/2013 | US8454335 Valveless vane compressor |