| 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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| 05/24/1994 | US5314319 Hydraulic pump for a vehicle engine |
| 05/05/1994 | DE4336892A1 Oil pressure drive for vehicle with hydraulic steering and engine cooling - has engine-driven variable delivery pump supplying steering servo and hydraulically impelled engine cooling fan via distributor valve |
| 04/27/1994 | EP0593913A2 Electrically driven hydraulic pump |
| 04/14/1994 | WO1994008139A1 Hydraulic pump/motor |
| 03/29/1994 | CA2049502C Rotor placer for progressive cavity pump |
| 03/24/1994 | DE4310211A1 Hydraulic gear pump or motor with main gear pair (5) - has second compensation gear pair (5) with continuously meshing tooth pair(s) |
| 03/24/1994 | DE4231784A1 Electrically-driven hydraulic pump - cools control stage for collectorless electric motor by hydraulic fluid handled by pump |
| 03/17/1994 | DE4310210A1 Hydraulic gear pump on motor with measuring main gear pair - has secondary gear pair, coacting with main one, with one pair acting as pump, and another one as motor |
| 03/03/1994 | WO1994004824A1 Compact gerotor pump |
| 02/08/1994 | US5284424 Osmotic water purification pumping system with flush valve |
| 12/21/1993 | US5271723 Engine driven oil pump |
| 12/16/1993 | DE4219462A1 Hydraulic set with pump driven by electric motor - has oil container designed in elongated cylindrical shape with rigid frame having at least three corner posts standing in corners of polygon and cross connections between posts |
| 12/15/1993 | EP0573516A1 Thermodynamic systems including gear type machines for compression or expansion of gases and vapors |
| 12/07/1993 | US5267837 Two-stage pumping apparatus with non-meshing first stage augers |
| 11/16/1993 | US5261796 Electric-motor in-line integrated hydraulic pump |
| 11/09/1993 | US5259740 Rotary compressor |
| 11/02/1993 | US5257919 Dual revolving vane meter-motor-pump |
| 09/28/1993 | US5248223 Fuel pump with anti-reversion inlet |
| 09/22/1993 | EP0561153A1 Capacity regulating device for at least two hydrostatic variable displacement pumps |
| 09/16/1993 | WO1993018307A1 Compressor slide valve control |
| 09/07/1993 | CA2068640A1 Dual revolving vane meter-motor-pump |
| 08/18/1993 | EP0555621A1 Pump arrangement |
| 07/22/1993 | DE4201401A1 Displacement pump conveying fuel in motor vehicle - has drive motor installed into jar-shaped housing as complete prefabricated component of motor housing |
| 07/07/1993 | EP0549579A1 Rotary pump |
| 06/23/1993 | EP0547254A1 Apparatus for generating an air/oxygen stream in biological purification plants |
| 06/15/1993 | US5219277 Electric-motor fuel pump |
| 06/09/1993 | EP0544856A1 Electric-motor-driven hydraulic pump. |
| 05/25/1993 | US5213491 Tandem pump having a different sized vane for each pump |
| 05/19/1993 | EP0541883A1 Pump driven by reaction turbine |
| 05/15/1993 | CA2078849A1 Motor-driven pump with reaction turbine |
| 05/12/1993 | EP0541337A1 Electric motor driven hydraulic appartus with an integrated pump |
| 05/11/1993 | US5209294 Rotor placer for progressive cavity pump |
| 05/05/1993 | CA2082038A1 Electric motor driven hydraulic apparatus with an integrated pump |
| 04/01/1993 | DE4229607A1 Coupling between extruders and gear pumps - has adaptor tube which allows screw to extend some way into pump housing |
| 02/24/1993 | EP0528004A1 Hydraulic pump for a vehicle engine. |
| 02/09/1993 | US5184947 Fully variable output hydraulic gear pump having an axially translatable gear |
| 02/03/1993 | EP0524960A1 Fuel feed-pump unit |
| 02/02/1993 | US5183395 Compressor slide valve control |
| 01/26/1993 | US5181837 Electric motor driven inline hydraulic apparatus |
| 01/21/1993 | DE4123384A1 Non-pulsating pump for volatile fuels - has electric driven pair of meshing spiral shafts inside motor housing |
| 01/19/1993 | US5179921 Integrated engine and compressor device |
| 01/07/1993 | WO1993000513A1 Electric-motor-driven hydraulic pump |
| 01/07/1993 | DE4121684A1 High pressure feed pump for chemical applications - has offset rotors for providing smooth flow without pulsation |
| 12/29/1992 | US5174725 Gear pump having multiple pairs of gears |
| 12/24/1992 | DE4120665A1 Elektromotorisch angetriebene hydraulikpumpe Electric motor-driven hydraulic pump |
| 12/23/1992 | CN1019593B Spinning pump |
| 12/15/1992 | US5171131 Power transmission |
| 12/10/1992 | DE4121717A1 Eccentric scroll pump - has rotor connected to drive unit and feeding hopper with storage space at base for handling highly viscous material |
| 12/09/1992 | EP0517014A1 Lubrication gear pump for internal combustion engines, especially for vehicles |
| 12/01/1992 | CA1310862C Turbine driven rotary pump |
| 11/26/1992 | WO1992020922A1 Fully variable output hydraulic gear pump having an axially translatable gear |
| 11/19/1992 | EP0513998A1 Power transmission |
| 11/15/1992 | CA2066131A1 Power transmission |
| 10/21/1992 | EP0509724A1 Power transmission |
| 10/19/1992 | CA2066023A1 Power transmission |
| 10/07/1992 | EP0507512A1 Oil pumps |
| 09/17/1992 | WO1992015773A1 Hydraulic pump for a vehicle engine |
| 09/03/1992 | DE4106085A1 Lubricating oil pump for IC engine - has housing by pump housing and drive housing halves |
| 09/02/1992 | WO1992015774A1 Thermodynamic systems including gear type machines for compression or expansion of gases and vapors |
| 09/02/1992 | CA2105296A1 Thermodynamic systems including gear type machines for compression or expansion of gases and vapors |
| 08/26/1992 | EP0500022A1 Tandem pump |
| 08/13/1992 | DE4203256A1 Oil pump with meshing gear wheels - uses recess and projection to position inner gear during assembly |
| 08/13/1992 | DE4102956A1 Sealed pump for adhesive - is attached to slide running on vertical rod |
| 08/06/1992 | WO1992013196A1 Rotary pump |
| 06/16/1992 | US5122039 Electric-motor fuel pump |
| 06/16/1992 | US5122038 High density grout pump |
| 06/04/1992 | DE4038438A1 Fuel delivery unit for vehicular internal combustion engine - has two pumps directly coupled by dovetail projections from hub into notched pinion without intermediate follower |
| 06/02/1992 | US5118267 Spinning pump having an adapter with a radial groove |
| 05/29/1992 | WO1992008895A1 Gerotor pumps |
| 05/29/1992 | CA2095133A1 Gerotor pumps |
| 05/20/1992 | EP0486164A1 Gerotor pumps |
| 04/30/1992 | DE4134219A1 Gear tooth pump with variable volumetric flow - has additional gears which are disconnected from driving shaft as pressure rises |
| 04/28/1992 | US5108271 Multiple connection for rotation vacuum pumps |
| 04/15/1992 | CN1060340A Pressurizing device for transfer pump of viscous materials |
| 04/01/1992 | EP0478107A2 Dual capacity fluid pump |
| 03/28/1992 | CA2041592A1 Dual capacity fluid pump |
| 02/25/1992 | CA1296240C Hydraulic transmission and energy saver |
| 02/11/1992 | US5087177 Dual capacity fluid pump |
| 11/21/1991 | DE4115652A1 Rotary shock compensating device - has radial piston pump to generate pressure to actuate friction ring in two=part flywheel |
| 10/31/1991 | WO1991016537A1 Fuel feed-pump unit |
| 10/17/1991 | DE4011846A1 Fuel supply system for vehicle engine |
| 10/15/1991 | US5056994 Hydrostatic rotary piston machine having interacting tooth systems |
| 10/02/1991 | DE4110392A1 Rotary vane pump for vehicle steering - has compact double rotor with double vanes mounted on drive shaft |
| 10/02/1991 | CN1055043A Gear pump |
| 09/25/1991 | EP0447766A2 Spinning pump |
| 09/24/1991 | CA1289412C Fluid driven pumping apparatus |
| 08/20/1991 | US5040951 Oil pump |
| 08/20/1991 | US5040950 Power washing apparatus |
| 08/14/1991 | DE4104282A1 Pump designed to handle wet cement - has screen conveyor connected to serpentine rotor mounted in stator |
| 08/14/1991 | DE4007858C1 Rotary liquid pump - has pump coupled to block by symmetrically placed fastening screws |
| 08/06/1991 | US5037283 Vane type positive displacement pump having multiple pump units |
| 07/30/1991 | US5035585 Multiple connector for rotation vacuum pumps |
| 07/25/1991 | DE3941133A1 Device for recovering energy in reverse osmosis systems - uses throttle valve in retentate line replace by pump coupled to feed pump with smaller delivery rate |
| 07/24/1991 | EP0437919A2 Vane type positive displacement pump |
| 06/11/1991 | US5022830 Submerged fuel pump |
| 05/07/1991 | US5012837 Ratio device for dispensing liquids |
| 04/02/1991 | US5004407 Method of scavenging air and oil and gear pump therefor |
| 02/20/1991 | EP0364459B1 Internal tank/fuel pump unit |
| 01/24/1991 | DE3924071A1 Rotary pump with sealing discs - has compact installation alongside shaft bearings |
| 01/16/1991 | EP0407738A1 Pump arrangement on a machine, especially lubricating oil pump on an internal combustion engine |