| Patents for F04C 2 - Rotary-piston machines or pumps (14,296) |
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| 09/07/1992 | CA2061784A1 Articulated coupling for use with a downhole drilling aparatus |
| 09/03/1992 | WO1992014931A1 Pump with variable clearance compensator end plate |
| 09/03/1992 | DE4205838A1 Pump with ring piston - has line contact between piston jacket and chamber jacket in sealing area |
| 09/03/1992 | DE4106085A1 Lubricating oil pump for IC engine - has housing by pump housing and drive housing halves |
| 09/02/1992 | EP0501236A1 Pump, in particular encased medical pump |
| 09/02/1992 | CN2114714U Fluid pump |
| 08/25/1992 | US5141418 Variable capacity type vane pump with a variable restriction orifice |
| 08/20/1992 | DE4107822A1 Locking valve with valve chamber inside housing - has one inlet, two outlets and elastically deformable closure piece against two valve seatings |
| 08/20/1992 | DE4103848A1 Rotating displacement pump for handling viscous media - incorporates at least one drivable impeller worm rotatably located in cylindrical inner chamber of pump housing |
| 08/18/1992 | US5139401 Oscillatory pump with elastic divider |
| 08/18/1992 | US5139395 Aggregate for supplying fuel from a supply tank to internal combustion engine of power vehicle |
| 08/13/1992 | DE4203256A1 Oil pump with meshing gear wheels - uses recess and projection to position inner gear during assembly |
| 08/11/1992 | US5137438 Multiple speed fluid motor |
| 08/05/1992 | EP0494912A4 Rotary piston machine seal |
| 08/04/1992 | US5135373 Spur gear with epi-cycloidal and hypo-cycloidal tooth shapes |
| 08/04/1992 | US5135371 Internal gear pump with radial openings |
| 08/04/1992 | US5135369 Device with orbiting valve having a seal piston |
| 08/04/1992 | US5135060 Articulated coupling for use with a downhole drilling apparatus |
| 07/30/1992 | DE4102162A1 Quiet running electric fuel pump for motor vehicle - has gear shaped impeller with sloping teeth for controlled axial thrusts |
| 07/29/1992 | EP0496170A2 Positive displacement pumps |
| 07/23/1992 | DE4101641A1 Pump with three gears - has gearwheels channelling pressure medium to either of two separate outlets |
| 07/22/1992 | EP0494912A1 Rotary piston machine seal |
| 07/21/1992 | US5131826 Rolling piston rotary machine with vane control |
| 07/15/1992 | EP0494581A2 Rotary piston machine |
| 07/09/1992 | WO1992011082A1 Constant ratio post-mix beverage dispensing valve |
| 07/08/1992 | CN2109447U Double-action variable quantity paddle pump |
| 07/01/1992 | EP0492348A1 Gerotor motor and improved valve drive therefor |
| 06/30/1992 | CA1304260C Scroll fluid device using flexible toothed ring synchronizer |
| 06/25/1992 | CA2058325A1 Positive displacement pumps |
| 06/24/1992 | CN2108191U Slipper rotor variable displacement pump |
| 06/23/1992 | US5123821 Screw spindle pump with a reduced pulsation effect |
| 06/16/1992 | US5122335 Forming half gear members by powder metallurgy, mating |
| 06/16/1992 | US5122039 Electric-motor fuel pump |
| 06/11/1992 | WO1991018826A3 Postmix beverage dispensing system |
| 06/10/1992 | CN2106917U Special rotary pump |
| 06/09/1992 | US5120206 Gear metering pump for compounded elastomeric material |
| 06/09/1992 | US5120204 Helical gear pump with progressive interference between rotor and stator |
| 06/03/1992 | CN2106246U Digital control measuring screw pump |
| 06/02/1992 | US5118267 Spinning pump having an adapter with a radial groove |
| 05/31/1992 | CA2056733A1 Gear pump for a metered liquid dispensing system |
| 05/29/1992 | WO1992008895A1 Gerotor pumps |
| 05/29/1992 | CA2095133A1 Gerotor pumps |
| 05/20/1992 | EP0486164A1 Gerotor pumps |
| 05/19/1992 | US5114325 Rotary internal gear pump having teeth with asymmetrical trailing edges |
| 05/17/1992 | CA2030189A1 Rotary displacement machine |
| 05/14/1992 | WO1992008049A1 Two speed gerotor motor with centrally located valve and commutator |
| 05/13/1992 | CN2104325U 一种新型摆线润滑泵 A new lubrication pump cycloid |
| 05/12/1992 | US5112349 Heart assist pump |
| 05/12/1992 | US5112199 Fluid pump unit with flow control valve |
| 05/06/1992 | EP0484201A1 Hydraulic gear pump or motor for water operation |
| 05/06/1992 | CN2103671U Double-end liquid intake type maze screw pump |
| 05/06/1992 | CN2103670U High-lift small-flow maze screw pump |
| 05/06/1992 | CN1016522B Positive-displacement rotor pump with cavity of spiral curved surface |
| 04/30/1992 | DE4134219A1 Gear tooth pump with variable volumetric flow - has additional gears which are disconnected from driving shaft as pressure rises |
| 04/30/1992 | DE4034280A1 Pump for pumping hydraulic fluid - has spring-loaded blades which are pressed against undulating face of rotor |
| 04/29/1992 | EP0483029A1 High pressure hydraulic generator-receiver for power transmission |
| 04/28/1992 | US5108275 Rotary pump having helical gear teeth with a small angle of wrap |
| 04/28/1992 | US5108273 Helical metering pump having different sized rotors |
| 04/23/1992 | DE4033455A1 Vane type compressor for cooling systems - comprises cast aluminium@ alloy stator ring and radially sliding vanes in polyether-ether ketone with PTFE filler |
| 04/22/1992 | EP0481347A1 Vane pump |
| 04/15/1992 | EP0480101A1 Heart assist pump |
| 04/15/1992 | CN1016261B Waveform actuating air compressor |
| 04/14/1992 | US5104303 Internal gear pump with tapered oil pockets in sliding surfaces |
| 04/07/1992 | US5102314 Vane pump for conveying pasty masses, in particular sausage meat |
| 04/01/1992 | EP0478514A1 Variable delivery gear pump |
| 04/01/1992 | CN2100511U Internal engagement epicycloidal oil pump |
| 03/31/1992 | US5100310 Gerotor motor and improved valve drive therefor |
| 03/25/1992 | CN1059783A Rotary pump made of engineering ceramic |
| 03/24/1992 | US5098264 Yin-Yang fluid power machine |
| 03/18/1992 | EP0475109A1 Internal-gear pump for hydraulic fluid |
| 03/18/1992 | EP0475041A1 Machine |
| 03/18/1992 | CN2099206U Two-way inner tooth-meshed lubricating pump |
| 03/17/1992 | US5096398 Pulse tuned optimized positive displacement porting |
| 03/17/1992 | US5096397 Suction-controlled gear ring pump |
| 03/12/1992 | DE4116697C1 Casing for eccentric worm pump with split stator jacket - has stator arranged to burst on excess of preset inner overpressure in split region |
| 03/11/1992 | EP0474001A1 Internal gear pump for hydraulic fluids |
| 03/05/1992 | WO1992003636A1 Guided vanes hydraulic power system |
| 03/04/1992 | EP0473025A1 Internal-gear pump for hydraulic fluid |
| 03/03/1992 | US5092751 Split gear pump mechanism with gear offset |
| 02/26/1992 | CN2097295U Internal-engagement internal cycloidal oil pump |
| 02/25/1992 | US5090883 Fuel supply assembly for a motor vehicle |
| 02/25/1992 | US5090881 Variable-displacement vane-pump |
| 02/25/1992 | CA1296240C Hydraulic transmission and energy saver |
| 02/12/1992 | CN1015487B Harmonic motion wearless eccentric rotor pump |
| 02/11/1992 | US5087183 Rotary vane machine with simplified anti-friction positive bi-axial vane motion control |
| 02/06/1992 | WO1992001870A1 Gear pump or motor |
| 02/05/1992 | EP0469135A1 Gear pump or motor. |
| 02/05/1992 | EP0441913A4 Frictionless rotary pump-motor-meter |
| 02/05/1992 | CN1015394B Rotary piston machine |
| 02/04/1992 | US5085561 Gas removal pump for liquid |
| 01/28/1992 | US5083909 Seawater hydraulic vane type pump |
| 01/23/1992 | WO1992001161A1 Improvements in gerotor pumps |
| 01/22/1992 | EP0467571A1 Improvements in gerotor pumps |
| 01/16/1992 | DE4022500A1 Zahnradpumpe oder motor Gear pump or motor |
| 01/15/1992 | EP0466351A1 Improvements relating to gerotor pumps |
| 01/15/1992 | CN1057888A Vane pum system |
| 01/12/1992 | CA2046376A1 Gerotor pumps |
| 01/08/1992 | EP0464683A1 Fluid compressor |
| 01/08/1992 | EP0464261A1 Fuel supply pump |
| 01/03/1992 | WO1992000440A1 Rotary disc pump |