| Patents for F04C 13 - Adaptations of machines or pumps for special use, e.g. for extremely high pressures (1,349) |
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| 05/15/1991 | EP0427608A1 Device for preventing the deposition of impurities inside apparatuses which are not directly accessible |
| 05/14/1991 | US5015162 Attachment for an oil well screw pump system |
| 05/07/1991 | US5012837 Ratio device for dispensing liquids |
| 04/03/1991 | EP0420191A2 Screw pump |
| 04/02/1991 | US5004407 Method of scavenging air and oil and gear pump therefor |
| 02/14/1991 | DE3926531A1 Applying highly viscous medium - involves use of low pressure pump and high pressure pump in series |
| 02/05/1991 | US4990070 Rotary screw pump with suction vanes at intake port |
| 01/24/1991 | DE3923454A1 Emptier for discharge tubes and dispensers - has rotary piston pump with filter tubes and circular cylindrical compartment |
| 01/15/1991 | US4984975 Rotary pump with cutting means |
| 12/13/1990 | DE3918642A1 Rotary piston pump for watery fluids containing solids - has by=pass channel to avoid blockages between suction and pressure sides |
| 11/22/1990 | DE3916339A1 Pump for delivery of cold-flow medium - with integration of second pump to deliver cleaning fluid |
| 11/14/1990 | CN2065685U Roll pump for ceramic sprayed coating |
| 11/14/1990 | CN1046961A Extra-high pressure electric oil pump |
| 10/23/1990 | US4964864 Heart assist pump |
| 09/18/1990 | US4957161 Device for pumping a fluid at the bottom of a well |
| 09/07/1990 | WO1990010155A1 Two-stage pumping apparatus with low shear first stage |
| 09/04/1990 | CA1273529A1 Pump, particularly for highly viscous materials |
| 08/02/1990 | DE3902902A1 Submerged pump |
| 07/31/1990 | US4944657 Two-stage pumping apparatus with low shear first stage |
| 07/10/1990 | US4940394 Adjustable wearplates rotary pump |
| 06/05/1990 | US4930997 Portable medical suction device |
| 05/23/1990 | DE3908193A1 Appliance for fixing and sealing a Moineau pump (eccentric worm screw pump) in the riser of a liquid delivery probe |
| 04/26/1990 | DE3934280A1 Radial sliding vane pump - with specified lining for rotor and rotor drive shaft |
| 04/03/1990 | US4913629 Wellpoint pumping system |
| 12/07/1989 | DE3818508A1 Sterilisable model of an eccentric screw pump |
| 11/07/1989 | US4878540 Apparatus and process for pumping fluid from subterranean formations |
| 11/02/1989 | EP0339332A2 Vane pump for the transport of food products |
| 11/02/1989 | EP0339327A1 Conveying device for pasty products |
| 09/26/1989 | CA1261762A1 Rotary fluid-handling mechanism |
| 09/21/1989 | WO1989008798A1 Improved lobe pump |
| 07/04/1989 | US4844296 Apparatus and method for quantitatively delivering food materials |
| 06/29/1989 | DE3842988A1 Gear pump |
| 04/13/1989 | DE3731907A1 Device for feeding material to be conveyed into an eccentric screw pump |
| 04/05/1989 | CN1032225A Fully sealed magnetic pendulum pump |
| 03/15/1989 | EP0307365A2 Rotary pump for semisolid products particulary for filling sausages with minced meat |
| 01/04/1989 | EP0297960A2 Fluid-pumping apparatus in a well |
| 12/20/1988 | US4792294 Two-stage screw auger pumping apparatus |
| 11/29/1988 | US4787826 Pump, particularly for highly viscous materials |
| 10/19/1988 | EP0287209A2 An apparatus and method for quantitatively delivering food materials |
| 10/05/1988 | EP0284780A2 Production tubing string for deep wells |
| 08/31/1988 | EP0280294A2 Test drill string for deep wells |
| 03/01/1988 | US4728272 Rotary fluid displacement machine with revolving working chambers of periodically varying volume |
| 02/16/1988 | US4725211 Gear pumps |
| 01/20/1988 | EP0156845B1 Means for the handling of contaminated fluids |
| 01/07/1988 | EP0250735A2 Feeding device, especially for pasty substance |
| 12/08/1987 | US4711647 Process and apparatus for degassing liquids, especially polymer melts and solutions |
| 09/09/1987 | EP0236148A2 Oscillating piston-type multifunctional volumetric pump |
| 08/25/1987 | US4688815 Hydraulically driven bicycle |
| 08/11/1987 | CA1225280A1 Gear pump-liquid gas mixer with improved gas introduction |
| 08/04/1987 | US4684335 Pumps |
| 07/14/1987 | US4679638 Downhole progressive cavity type drilling motor with flexible connecting rod |
| 06/24/1987 | EP0225937A1 Rotary piston pump for conveying manure or the like |
| 03/24/1987 | US4651897 Portable progressive cavity pump |
| 02/26/1987 | DE3529528A1 Screw pump |
| 01/20/1987 | US4637785 Rotary pump with cutter device for contaminated fluids |
| 01/13/1987 | US4636151 Downhole progressive cavity type drilling motor with flexible connecting rod |
| 01/13/1987 | CA1216468A1 Rotary vaned pumps with fixed length and shearing knife-edged vanes |
| 11/18/1986 | US4623305 Hydraulic screw machine |
| 11/18/1986 | US4622717 Portioning machine to fill molds with plastic food material and use of same |
| 11/05/1986 | EP0200152A2 Method and apparatus for degassing liquids, polymer melts and solutions |
| 10/08/1986 | EP0196991A1 Downhole drilling motor |
| 08/13/1986 | EP0190564A2 Gear pump-liquid gas mixer with improved gas introduction |
| 08/06/1986 | EP0189670A1 Gear pumps |
| 07/22/1986 | US4601645 Gear pump-liquid gas mixer with improved gas introduction |
| 07/16/1986 | EP0187357A1 A rotary fluid displacement machine with revolving working chambers of periodically varying volume |
| 06/10/1986 | CN85109018A Rotary fluid-handling mechanism |
| 06/04/1986 | EP0183380A2 Positive-displacement screw pump |
| 06/03/1986 | US4592427 Through tubing progressing cavity pump |
| 04/29/1986 | US4584934 Apparatus for producing a homogenous flexible layer of material from blocks of highly consistent material, such as butter or margarine |
| 03/11/1986 | CA1201622A1 Pumping system suitable for conveying a high consistency material |
| 01/15/1986 | EP0168366A1 A device for pumping oil |
| 12/31/1985 | US4561834 Rotary vaned pumps with fixed length and shearing knife-edged vanes |
| 12/27/1985 | EP0165884A1 Hydraulic high-pressure producer or receiver for the transmission of power |
| 11/19/1985 | US4553908 High pressure pump with a flow control valve |
| 10/09/1985 | EP0156845A1 Means for the handling of contaminated fluids. |
| 08/13/1985 | US4534717 Flushable metering pump |
| 05/28/1985 | US4519904 Connected to food chopper pump |
| 03/28/1985 | WO1985001327A1 Means for the handling of contaminated fluids |
| 03/20/1985 | EP0134636A1 Rotary vaned pumps |
| 11/06/1984 | CA1177327A1 Power steering pump |
| 11/06/1984 | CA1177326A1 Power steering pump |
| 10/03/1984 | EP0120597A1 Positive displacement pump |
| 09/11/1984 | CA1174113A1 Flushable rotary gear pump |
| 06/12/1984 | US4453901 Positive displacement pump |
| 04/17/1984 | CA1165524A1 Rubber injection unit |
| 04/03/1984 | CA1164728A1 Power steering pump |
| 03/27/1984 | US4439120 Meshing cog-wheel injection unit with lateral sealing and scropers |
| 03/27/1984 | CA1164268A1 Submersible pump for use in toxic and hazardous waste sampling |
| 12/27/1983 | US4422834 Power steering pump |
| 12/13/1983 | US4420290 Power steering pump |
| 11/30/1983 | EP0095288A1 Bore hole pump |
| 10/11/1983 | US4408963 Power steering pump |
| 10/04/1983 | US4407642 Fuel supply unit |
| 08/23/1983 | US4400147 Flushable rotary gear pump |
| 07/27/1983 | EP0084291A1 Dosing machine for the filling with deformable foodstuff of permanent-shaped cavities, and its use |
| 07/20/1983 | EP0083955A1 A pumping system suitable for conveying a high consistency material |
| 06/28/1983 | CA1148791A1 Combined lift and metering pump |
| 12/21/1982 | CA1137814A1 Pump |
| 12/01/1982 | EP0065654A2 Pomp for supplying fluid to a system |
| 12/01/1982 | EP0065653A2 Pomp for supplying fluid to a system |