| Patents for F04C 11 - Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations (1,800) |
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| 01/01/1991 | US4981422 Gerotor device having a valve opening diameter smaller than the drive connection diameter |
| 11/28/1990 | CN2066516U Screw pump for deep water lifting driving by hydraulic |
| 11/22/1990 | DE3916528A1 Gear pump for lubricating racing car engine - has arrangement of shafts to achieve compact design |
| 11/22/1990 | DE3916339A1 Pump for delivery of cold-flow medium - with integration of second pump to deliver cleaning fluid |
| 11/20/1990 | US4971535 Tandem rotary pump with pressure chamber between two intermediate side plates |
| 11/20/1990 | US4971525 Hydraulic pump for hydraulically driven fan system |
| 11/13/1990 | US4969806 Aggregate for feeding fuel from supply tank to internal combustion engine of a power vehicle |
| 08/14/1990 | US4948346 Fuel pump mount for reduction of vibration transmission |
| 07/04/1990 | EP0376901A1 An internal combustion engine, particularly for motor vehicles |
| 05/09/1990 | EP0367046A1 Hydrostatic rotary piston machine |
| 04/18/1990 | EP0213154B1 Rotary motion fluid apparatus |
| 04/17/1990 | US4916899 Stator shaft connection through oil pump of automatic transmission |
| 04/04/1990 | EP0361716A2 Improvements relating to gerotor pumps |
| 04/03/1990 | US4913631 Turbine-driven rotary pump |
| 03/27/1990 | US4911119 Oil pump mounting system for internal combustion engines |
| 03/13/1990 | US4907954 Multiple lobed piston pump with angularly and axially displaced segments and throttle valve |
| 02/15/1990 | DE3916623A1 Rotary hydraulic pump or motor - has coupling wobble bar of larger dia. than opening in rotary valve |
| 01/18/1990 | DE3821800A1 Hydraulic motor, in particular oil-pressure motor |
| 01/17/1990 | EP0350524A1 Multiple gear shift assembly for rotary vacuum pumps |
| 01/10/1990 | CN2050887U Variable quantity paddle pump |
| 12/07/1989 | DE3916908A1 Liquid pump, especially a fuel pump for a motor vehicle |
| 11/28/1989 | US4883409 Pumping apparatus for delivering liquid at high pressure |
| 10/26/1989 | DE3812412A1 Pump drive for fixed displacement pumps with mobile drive |
| 10/25/1989 | CN2046556U Manpower hydraulic driving-machine |
| 10/24/1989 | US4875841 Staggered rotor gerotor device |
| 10/19/1989 | DE3804023A1 Hydraulic-booster system |
| 09/28/1989 | DE3807462A1 Pump combination |
| 09/26/1989 | US4869648 Vane type rotary fuel pump |
| 09/19/1989 | US4867871 Sewage system discharge pump module |
| 09/12/1989 | US4865522 Fuel pump for an internal combustion engine having two pump units |
| 08/31/1989 | DE3904874A1 Tandem pump |
| 08/30/1989 | EP0330640A1 Turbine motor pump and rotary pump |
| 07/12/1989 | EP0323834A2 Sealless pump |
| 06/29/1989 | DE3743261A1 Twin pump for a flow medium with different delivery rates and delivery pressures |
| 06/20/1989 | CA1255961A1 Compound pump mechanism for meat encasing machines and the like |
| 06/13/1989 | CA1255539A1 Offset three-gear, two-system pump |
| 06/06/1989 | CA1255187A1 Rotary motion fluid apparatus |
| 05/30/1989 | US4834623 Electric fuel pump |
| 05/09/1989 | US4828036 Apparatus and method for pumping well fluids |
| 05/09/1989 | US4827881 Engine oil pump |
| 04/19/1989 | EP0312398A1 Fuel pump motor |
| 04/11/1989 | US4820135 Fluid driven pumping apparatus |
| 04/05/1989 | EP0309596A1 Pumping apparatus for delivering liquid at high pressure |
| 04/05/1989 | CN1032225A Fully sealed magnetic pendulum pump |
| 03/28/1989 | US4815954 Offset three-gear, two-system pump |
| 03/07/1989 | US4809507 Rotary fluid device |
| 01/04/1989 | EP0297274A2 Transfer arrangement consisting of a pump with a driving device |
| 12/15/1988 | DE3718311A1 Multiple-piston flywheel rotary pump |
| 11/17/1988 | WO1988008929A1 Internal tank/fuel pump unit |
| 11/16/1988 | CN87215767U Internal gearing rotor semi-enclosed type oil pump |
| 10/26/1988 | CN87210070U Tandem metering pump unit |
| 10/11/1988 | US4776176 Liquid exchange systems |
| 09/28/1988 | EP0284241A2 Vane pump |
| 09/13/1988 | CA1241868A1 Wet motor gerotor fuel pump |
| 09/13/1988 | CA1241867A1 Wet motor gerotor fuel pump with self-aligning bearing |
| 08/10/1988 | EP0277861A1 Screw-type hydraulic motors |
| 08/04/1988 | DE3701586A1 Sealless pump |
| 07/19/1988 | US4758130 Two rotary gear pumps arranged in different plates |
| 07/06/1988 | EP0273386A2 Electric fuel pump |
| 05/19/1988 | DE3638848A1 Unit for the delivery of fuel from a tank to the internal combustion engine, especially of a motor vehicle |
| 04/27/1988 | EP0264719A2 Method and device for the continuous and quantity-controlled liquid exchange in distillation plants and absorption refrigeration cycles |
| 01/07/1988 | DE3721485A1 Screw pump |
| 12/23/1987 | DE3620705A1 Internal gear wheel pump as lubricating oil pump |
| 11/25/1987 | EP0246755A2 Fuel pump apparatus |
| 11/19/1987 | EP0245539A2 Apparatus provided with a vane pump |
| 10/20/1987 | US4700680 For an engine |
| 10/06/1987 | US4697995 Rotary positive displacement fuel pump with purge port |
| 09/22/1987 | US4694536 Compound pump mechanism for meat encasing machines and the like |
| 09/09/1987 | EP0236148A2 Oscillating piston-type multifunctional volumetric pump |
| 08/25/1987 | US4688815 Hydraulically driven bicycle |
| 08/04/1987 | CA1224971A1 Gear rotor fuel pump |
| 06/16/1987 | US4672937 Fuel pump system |
| 06/04/1987 | DE3637229A1 Structural unit consisting of a hydraulic pump and a vacuum pump |
| 05/27/1987 | DE3541296A1 Pump unit for fixing liquid |
| 05/05/1987 | US4662827 Wet motor geroter fuel pump |
| 04/14/1987 | US4656827 Fuel metering system for a gas turbine engine |
| 04/07/1987 | US4655185 Pressure regulating device |
| 04/01/1987 | EP0216406A1 Fluid driven pumping apparatus |
| 03/24/1987 | US4651897 Portable progressive cavity pump |
| 03/11/1987 | CN86202113U Explosion protection impeller pump with liquid-electricity combined controlling alarm |
| 02/24/1987 | US4645430 Wet motor gerotor fuel pump with self-aligning bearing |
| 02/17/1987 | US4642985 Oil pump system in power train |
| 02/10/1987 | US4642030 Arrangement for feeding fuel from supply tank |
| 01/27/1987 | US4639202 Gerotor device with dual valving plates |
| 01/13/1987 | US4636145 Down-well pump device |
| 12/30/1986 | EP0205954A1 Positive-displacement machine |
| 12/23/1986 | US4631009 Lubrication scavenge system |
| 12/16/1986 | US4629399 Aggregate for delivering fuel from a fuel supply tank to an internal combustion engine of a motor vehicle |
| 12/02/1986 | US4626178 Fuel supply pump |
| 11/26/1986 | EP0202816A2 Stackable rotary vane pump with improved volumetric efficiency |
| 10/28/1986 | US4619594 Stackable rotary vane pump with improved volumetric efficiency |
| 10/08/1986 | EP0196469A1 Electrically-driven fuel feed pump |
| 09/30/1986 | US4614232 Device for delivering flowable material |
| 08/14/1986 | WO1986004638A1 Rotary motion fluid apparatus |
| 06/24/1986 | US4596519 Gear rotor fuel pump |
| 06/04/1986 | EP0183422A2 Offset three-gear, two-system pump |
| 05/20/1986 | US4589829 Vane pump |
| 05/10/1986 | CN85103822A Centrifugation-volume compound compressor |
| 05/06/1986 | US4586468 Tandem pump assembly |
| 04/30/1986 | EP0179713A1 Fuel-metering device, for example for a gas turbine |