| Patents for F04C 2 - Rotary-piston machines or pumps (14,296) |
|---|
| 06/06/2000 | US6071102 Floating seal for sealed star gerotor |
| 06/06/2000 | US6070409 Engine for powering by water |
| 05/31/2000 | EP1003974A4 Cascaded progressing cavity pump system |
| 05/31/2000 | EP1003974A2 Cascaded progressing cavity pump system |
| 05/31/2000 | CN2380722Y Rotor of roller-rotor pump |
| 05/31/2000 | CN1254800A Plunger-type reciprocating rotary mechanism |
| 05/31/2000 | CN1053031C Swingrolling vane pump |
| 05/30/2000 | US6068461 Vane type rotary pump having a discharge port with a tapered bearded groove |
| 05/30/2000 | US6068460 Two speed gerotor motor with pressurized recirculation |
| 05/25/2000 | WO2000029750A1 Worm for an eccentric screw pump or a subsurface drilling motor |
| 05/25/2000 | DE19852380A1 Schnecke für eine Exzenterpumpe oder einen Untertagebohrmotor Screw for eccentric pump or a subsurface |
| 05/24/2000 | CN2379623Y 叶片泵 Vane pump |
| 05/24/2000 | CN2379622Y Two-stage vane pump |
| 05/18/2000 | WO2000028218A1 Rotary hydraulic machine |
| 05/18/2000 | DE19852181A1 Conveyor screw for eccentric screw conveyor pump, with ridge of screw conveyor body having helical flat spot in its outermost radial region |
| 05/17/2000 | CN2378553Y Efficient small displacement high pressure gear oil pump |
| 05/17/2000 | CN1253240A Double speed motor with forced circulation |
| 05/17/2000 | CN1253239A Oilless lubricating screw type compressor |
| 05/16/2000 | US6062836 Gear pump |
| 05/16/2000 | US6062835 Gerotor motor and parking lock assembly therefor |
| 05/11/2000 | WO2000026540A1 Series for compressed air motors with torque which can be theoretically output in a varied manner and a method for producing the individual compressed air motors of said series |
| 05/11/2000 | WO2000026539A1 Line of products for gear pumps having different delivery capacity and method for producing said individual gear pumps of said line of products |
| 05/11/2000 | WO2000026506A1 Rotary piston machine |
| 05/11/2000 | WO2000025974A1 Method of manufacturing pin holding ring for internal gear, internally meshed planetary gear structure, and hydraulic motor and pump |
| 05/11/2000 | DE19849804A1 Baureihe für Zahnradpumpen mit unterschiedlicher Förderleistung und Verfahren zur Herstellung der einzelnen Zahnradpumpen der Baureihe Series for gear pumps with different flow rate and method for producing the individual gear pumps of the series |
| 05/11/2000 | CA2317013A1 Line of products for gear pumps having different delivery capacity and method for producing said individual gear pumps of said line products |
| 05/10/2000 | CN2377379Y Liquid seal screw and nipple pump |
| 05/10/2000 | CN1252852A Fluid machine |
| 05/09/2000 | US6059550 Twin-cylinder impeller pump |
| 05/04/2000 | DE19927255A1 Hydraulic conveyor unit has displacement unit in first housing part comprising rotor set in rotation by drivable shaft with cover closing first housing part and holder for conveyor unit connected to cover |
| 05/04/2000 | DE19849935A1 Axial screw pump for producing hydraulic energy has two meshing screw spindles in housing, of which at least one is driven, with further housing enclosing spindles and located axially displaceably |
| 05/03/2000 | EP0997644A2 Gerotor motor |
| 04/27/2000 | WO2000023251A1 Extrusion method, extruder and product produced thereby |
| 04/27/2000 | DE19847406A1 Stator für Exzenterschneckenpumpen Stator for eccentric screw pumps |
| 04/27/2000 | DE19847132A1 Außenzahnradpumpe mit Fördervolumenbegrenzung External gear pump with flow volume limit |
| 04/25/2000 | US6053718 Geared pump for conveying fluids |
| 04/25/2000 | US6053717 Rotary pump with wiper insert |
| 04/20/2000 | WO2000022301A1 Rotor for an eccentric screw pump, and a method for the production thereof |
| 04/20/2000 | DE19918743A1 Gear pump or motor for hydrostatic drive systems has device acting on one gear in a direction to compensate for operational force to reduce wear on gear teeth |
| 04/20/2000 | DE19851325A1 Rotor for eccentric screw pump |
| 04/20/2000 | DE19845383A1 Hydraulische Zahnradpumpe Hydraulic gear pump |
| 04/19/2000 | EP0994257A1 External gear pump with delivery limitation |
| 04/19/2000 | EP0994256A1 Stator for Moineau pump |
| 04/19/2000 | EP0993554A1 Improvements to impeller pumps |
| 04/18/2000 | US6050796 Vane pump |
| 04/13/2000 | WO2000020760A1 Rotary pump |
| 04/13/2000 | WO2000020759A1 Gear pump for pumping highly viscous fluids |
| 04/12/2000 | EP0774057B1 Spherical piston radial action engine |
| 04/11/2000 | US6048187 Gear pump |
| 04/11/2000 | US6048185 Hydraulic pumps |
| 04/11/2000 | CA2115795C Internal gear pump for wide speed range |
| 04/06/2000 | WO2000019102A1 Rotary machine |
| 04/06/2000 | WO2000019067A2 Lubrication system for hydraulic pumps |
| 04/06/2000 | DE19843161A1 Gehäuseaufbau zur Aufnahme eines Mikrosystems mit Fluiddurchsatz Housing assembly for receiving a micro system with fluid flow rate |
| 04/06/2000 | DE19842754A1 Eccentric screw pump with vibrating stator and perforated metal or plastic stabilizer sleeve around stator |
| 04/06/2000 | CA2309458A1 Lubrication system for hydraulic pumps |
| 04/05/2000 | EP0990797A1 Hydraulic gear pump |
| 04/05/2000 | EP0990198A2 Method and apparatus for accurately dispensing liquids and solids |
| 04/05/2000 | CN1249403A Bearing lubricating system for vortex type compressor |
| 04/05/2000 | CN1249402A Positive displacement pump |
| 04/05/2000 | CN1249401A Axial compliant cyclic medium pressure chamber with steps for vortex type compressor |
| 04/04/2000 | US6045338 Compound gear pumps and engine hydraulic circuits using same |
| 03/30/2000 | WO2000017523A1 Housing construction for accommodating a toothed ring micropump |
| 03/30/2000 | DE19855373C1 Automatic rotary piston pump for operating a flying arrangement of piston bearings and a constant stroke includes a rotating disk with several cylinder channels, cylinder ports |
| 03/29/2000 | EP0989303A1 Lubrication pump for an internal combustion engine |
| 03/29/2000 | EP0989286A1 Two stage rotary vane motor |
| 03/28/2000 | US6042351 Enhanced flow compressor discharge port entrance |
| 03/28/2000 | US6042343 Variable displacement pump |
| 03/22/2000 | EP0987438A1 Security against rotation for stators of eccentric screw pumps |
| 03/22/2000 | EP0987437A1 Internal gear pump |
| 03/21/2000 | US6039551 Gear pump for use in an electrically-operated sealed compressor |
| 03/21/2000 | US6039545 Method and apparatus for precision metering of high viscosity materials |
| 03/16/2000 | WO2000014411A1 Vane type rotary machine |
| 03/16/2000 | DE19942955A1 Fuel pump of inner gearwheel type for motor vehicle has inner gearwheel rotated by electric motor and internally toothed outer gear rotated by inner gear |
| 03/16/2000 | DE19942466A1 Adjustable displacement pump comprises pump body with inner chamber and suction and delivery paths connected to inner chamber, together with cam ring |
| 03/16/2000 | DE19927792A1 Oil pump for servo steering system on road vehicle incorporates rotor, cam ring, pump chamber and pressure plate arranged at least on one side of rotor and cam ring |
| 03/16/2000 | DE19842016A1 High efficiency gear pump suited to medical applications combines best attributes of peristaltic and piston pumps, by including resilience and oversize in rotor combination, eliminating leakage |
| 03/16/2000 | DE19840292A1 Slip bearing for drive motor serving a toothed hydraulic drive unit combines increased load bearing capacity and reduced bearing clearance |
| 03/15/2000 | EP0985827A1 Rotary pump |
| 03/15/2000 | EP0985826A1 Progressing cavity pump |
| 03/15/2000 | CN2369010Y Enhanced air cooling rotary slice roller pump |
| 03/15/2000 | CN2369009Y Agricultural water pump |
| 03/15/2000 | CN2368295Y Tooth-wheel style sprayer with gasoline power drive |
| 03/15/2000 | CN1247278A Oldam's coupling of whirl compressor |
| 03/14/2000 | US6036457 Relief valve which does not protrude beyond a compression housing |
| 03/14/2000 | US6036453 Pump assembly |
| 03/09/2000 | DE19849805C1 Hydraulic gear motor group has connected motors with different head circle diameters |
| 03/07/2000 | US6033197 Gear pump having a bleed slot configuration |
| 03/07/2000 | US6033195 Gerotor motor and improved spool valve therefor |
| 03/07/2000 | US6033190 Flat faced bearing housing engaging flat faced pump rotor housing |
| 03/02/2000 | WO2000011321A1 Rotary pump by the piston |
| 02/29/2000 | US6030196 Hydraulic variable-speed gear motor supplied with fluid and providing a variable torque |
| 02/29/2000 | US6030195 Rotary pump with hydraulic vane actuation |
| 02/29/2000 | US6030194 Gerotor motor and improved valve drive and brake assembly therefor |
| 02/29/2000 | US6030191 Low noise rotary vane suction pump having a bleed port |
| 02/25/2000 | CA2280533A1 Two-stage rotary vane motor |
| 02/24/2000 | WO2000009888A2 Pump |
| 02/24/2000 | WO2000009887A2 Pump |
| 02/17/2000 | WO2000008338A1 A motor driven pump |
| 02/17/2000 | DE19836630A1 Vane pump for the oil in a vehicle power assisted steering system has a direct centering for the side plates in the passage openings for the drive shaft with centering collars |