| Patents for F04C 2 - Rotary-piston machines or pumps (14,296) |
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| 03/27/2013 | CN202833133U Annular vane pump |
| 03/27/2013 | CN202833132U Double-external-thread conical spring gear pump |
| 03/27/2013 | CN202833131U Flange external thread airbag balancing gear pump |
| 03/27/2013 | CN202833130U Flange internal thread bevel spring gear pump |
| 03/27/2013 | CN202833129U Internal and external thread airbag balancing gear pump |
| 03/27/2013 | CN202833128U Double-internal-thread conical spring gear pump |
| 03/27/2013 | CN202833127U Aramid fiber spinning metering pump |
| 03/27/2013 | CN202833126U Compact-structure type gear pump |
| 03/27/2013 | CN202833125U Double-row outer meshed gear pump |
| 03/27/2013 | CN202833124U Pump body front portion integrated gear pump |
| 03/27/2013 | CN202833123U Energy-saving environment-friendly hydraulic gear pump |
| 03/27/2013 | CN202833122U Single-action gear pump |
| 03/27/2013 | CN202833121U Circular gear pump |
| 03/27/2013 | CN202833120U Double-internal-thread self-balancing gear pump |
| 03/27/2013 | CN202833119U Flange internal thread cylindrical spring gear pump |
| 03/27/2013 | CN202833118U Double-external-thread cylindrical spring gear pump |
| 03/27/2013 | CN202833117U Internal and external thread bevel spring gear pump |
| 03/27/2013 | CN202833116U Double-internal-thread airbag-balancing gear pump |
| 03/27/2013 | CN202833115U Double-internal-thread cylindrical spring gear pump |
| 03/27/2013 | CN202833114U Inside engaged gear device of gear oil pump and gear oil pump |
| 03/27/2013 | CN103003572A 叶片泵 Vane pump |
| 03/27/2013 | CN102996438A Submersible ball piston pump |
| 03/27/2013 | CN102996437A Heavy truck motor truck turning oil pump |
| 03/27/2013 | CN102996436A Circulating type volume increasing or decreasing device for each single sealed cavity of three-rotor blade pump or motor |
| 03/27/2013 | CN102996435A Electric oil pump |
| 03/27/2013 | CN102182675B Three-wire synchronous meshing spring compensation combined pump |
| 03/27/2013 | CN101443554B 旋转活塞机械 Rotary piston machine |
| 03/26/2013 | US8403656 Vane pump consisting of a two-part stator |
| 03/21/2013 | WO2013039770A1 Gerotor pump assembly and engine fluid delivery system using a gerotor pump assembly |
| 03/21/2013 | WO2013037540A1 Pump, in particular oil pump for an internal combustion engine |
| 03/21/2013 | WO2013037536A1 Pump assembly for a high-pressure injection system |
| 03/21/2013 | WO2013037535A1 Gear pump and method for producing a gear pump |
| 03/21/2013 | WO2013037534A1 Pump comprising an electric motor |
| 03/21/2013 | WO2011146099A3 Metering pump or segment, and metering pump assembly comprising a plurality of metering pumps or segments |
| 03/21/2013 | WO2011124213A3 Rotary piston pump and method for operating a rotary piston pump |
| 03/21/2013 | WO2011124212A3 Contact element for rotary piston pumps |
| 03/21/2013 | WO2011042105A3 Vane pump |
| 03/21/2013 | US20130071627 Hot isostatic pressing |
| 03/21/2013 | US20130071281 Compresser, engine or pump with a piston translating along a circular path |
| 03/21/2013 | US20130071280 Slurry Pump |
| 03/21/2013 | US20130071274 Vacuum pumping system |
| 03/21/2013 | US20130071267 Electric oil pump |
| 03/20/2013 | EP2570672A2 Electric oil pump |
| 03/20/2013 | EP2569540A2 Lubricant pump and control piston |
| 03/20/2013 | CN202811352U Gear pump spindle with labyrinth grooves |
| 03/20/2013 | CN202811351U High pressure gear pump with high abrasion resistance |
| 03/20/2013 | CN202811349U Portable multipurpose flow guide pump |
| 03/20/2013 | CN202811348U 纺丝计量泵 Spinning metering pump |
| 03/20/2013 | CN202811347U Double gear pump for engineering machinery |
| 03/20/2013 | CN202811346U Multiple-gear motor |
| 03/20/2013 | CN202811345U Bidirectional gear oil pump with full-hydraulic floating seal-less bidirectional shaft sleeves |
| 03/20/2013 | CN202811344U Oil-immersed three-screw pump |
| 03/20/2013 | CN202811343U Two-stage internally and externally engaged rotary sleeve pump |
| 03/20/2013 | CN102979728A Automotive steering oil pump |
| 03/20/2013 | CN102979727A Wear-resistant light-duty steering vane pump for heavy-duty truck |
| 03/20/2013 | CN102979726A Power steering pump assembly |
| 03/20/2013 | CN102979725A Axisymmetric curved surface rotary variable displacement pump |
| 03/20/2013 | CN102979724A Axisymmetric curved surface rotary variable displacement pump |
| 03/20/2013 | CN102979723A Axisymmetric curved surface rotary variable displacement pump |
| 03/20/2013 | CN102979722A Axisymmetric curved surface rotary variable displacement pump |
| 03/20/2013 | CN102979721A Axisymmetric curved surface rotary variable displacement pump |
| 03/20/2013 | CN102979720A Axisymmetric curved surface rotary variable displacement pump |
| 03/20/2013 | CN102979719A 泵 Pump |
| 03/20/2013 | CN102979718A Full-metal high-temperature-resistant screw pump |
| 03/20/2013 | CN102979717A Full-metal high-temperature-resistant screw pump |
| 03/20/2013 | CN102978523A Cam rotor pump rotor material |
| 03/20/2013 | CN102978521A Stator and rotor of homogeneous mixing pump and method for preparing same |
| 03/20/2013 | CN102978520A Rotors of cam rotor pump and preparation method thereof |
| 03/20/2013 | CN102974830A Preparation method for pump body structure of cam rotor pump |
| 03/20/2013 | CN102182681B Synchronal rotary multi-phase oil-gas mixed delivery pump |
| 03/20/2013 | CN101657342B Brake releasing mechanism and brake system |
| 03/19/2013 | US8398388 Vane pump |
| 03/19/2013 | US8398387 Fluid machine and refrigeration cycle apparatus |
| 03/14/2013 | WO2013036203A1 Revolving vane compressor |
| 03/14/2013 | WO2012101588A3 Pumping assembly for feeding oil under pressure to a user |
| 03/14/2013 | DE102011082587A1 Pumpe mit Elektromotor Pump with electric motor |
| 03/14/2013 | DE102011082578A1 Gear pump for conveying fluid, particularly for delivering fuel in high-pressure fuel injection system, has internally toothed ring, which has multiple tooth heads, where externally toothed gear has multiple other tooth heads |
| 03/14/2013 | DE102011082577A1 Zahnradpumpe und Verfahren zum Herstellen einer Zahnradpumpe Gear Pump and method for manufacturing a gear pump |
| 03/14/2013 | DE102011004858B4 Drehschieber Rotary vane |
| 03/13/2013 | EP2567142A1 Method and system for continuously pumping a solid material and method and system for hydrogen formation |
| 03/13/2013 | EP2567095A2 Lubricant valve for oil pumps of internal combustion engines |
| 03/13/2013 | EP2567069A2 Fluid energy transfer device |
| 03/13/2013 | CN202789516U Oil-gas recovery pump |
| 03/13/2013 | CN202789515U Rotor for hydraulic vane pump |
| 03/13/2013 | CN202789514U Novel double-rotation-direction emergency steering pump |
| 03/13/2013 | CN202789513U Asphalt conveying pump |
| 03/13/2013 | CN202789512U Duplicate gear oil pump for axial clearance compensation of side plate |
| 03/13/2013 | CN202789511U High liquid-gas ratio mixed conveying device |
| 03/13/2013 | CN202789510U Novel oil recovery device |
| 03/13/2013 | CN202789509U Oil pump for automatic transmission of vehicle |
| 03/13/2013 | CN202789508U Internal gear pump |
| 03/13/2013 | CN102966541A Automobile steering oil pump |
| 03/13/2013 | CN102966540A Vane pump or motor with blades that do not produce full-circumferential friction with rotor sidewalls |
| 03/13/2013 | CN102966539A Circular volume increase or decrease device for each monomer enclosed cavity of three-rotor vane pump or motor |
| 03/13/2013 | CN102966538A Vane pump |
| 03/13/2013 | CN102966537A Helical gear oil pump suitable for automobile steering systems |
| 03/13/2013 | CN102966536A Cycloid internal gear oil pump |
| 03/13/2013 | CN102966535A Inside engaged gear pump with static pressure supporting device |
| 03/12/2013 | CA2700212C Insertable progressive cavity pump |
| 03/12/2013 | CA2662055C Systems and methods to retard rod string backspin |