| Patents for F04D 31 - Pumping liquids and elastic fluids at the same time (579) |
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| 07/08/1993 | WO1993013318A1 Multiphase fluid treatment |
| 06/30/1993 | EP0549440A1 Method of optimisation of a device for regulating and dampening of a polyphasic flow and device obtained by this method |
| 06/30/1993 | EP0549439A1 Method and apparatus for optimising the transport of multiphase flows by pumping |
| 06/29/1993 | US5222863 Turbine multisection hydrojet drive |
| 06/02/1993 | EP0543853A1 A system for simultaneously degassing and pumping a liquid |
| 04/15/1993 | WO1993007391A1 Pump |
| 04/14/1993 | EP0537128A2 Pump |
| 04/10/1993 | CA2077582A1 Pump |
| 04/06/1993 | CA1315600C Medium consistency pump with self-feeding |
| 02/23/1993 | US5188771 Method and apparatus for treating a gas or liquid |
| 12/30/1992 | EP0217847B1 Pump or compressor unit |
| 10/29/1992 | WO1992018773A1 Impeller for centrifugal pump |
| 07/08/1992 | EP0493428A1 Pump or compressor unit. |
| 04/15/1992 | EP0480501A1 Down hole pump with compressor |
| 04/11/1992 | CA2053021A1 Apparatus for compressing a fluid |
| 03/25/1992 | EP0345258A4 Centrifugal pump |
| 02/15/1992 | WO1992003659A1 A system for simultaneously degassing and pumping a liquid |
| 01/29/1992 | EP0468877A1 Apparatus for multiphase pumping or compression and its application |
| 10/02/1991 | CN2085871U High-energy dissolution pump |
| 07/17/1991 | EP0437070A1 Gas separator for submersible pumps |
| 07/10/1991 | CA2027432A1 Recirculating gas separator for electric submersible pumps |
| 06/05/1991 | EP0430712A1 Method and apparatus for treating a gas or liquid |
| 05/31/1991 | CA2031036A1 Method and apparatus for treating a gas or liquid |
| 05/28/1991 | US5019136 Method and apparatus for separating gas with a pump from a medium being pumped |
| 05/16/1991 | WO1991006748A1 Regenerative pump and method of introducing fluid thereto |
| 04/16/1991 | US5007798 Centrifugal pump |
| 04/03/1991 | CN2074394U Self-feeding spraying pump |
| 03/21/1991 | DE4001523A1 Sewer system tank emptying mechanism - has vacuum pump following waste water discharge pump |
| 03/19/1991 | WO1991004417A1 Pump or compressor unit |
| 03/19/1991 | CA2066672A1 Pump or compressor unit |
| 02/27/1991 | EP0413788A1 Device for regulating and reducing a polyphasic flow, and its use |
| 01/01/1991 | US4981175 Recirculating gas separator for electric submersible pumps |
| 11/21/1990 | CN1047134A Water ring oxygen removing vacuum pump and its oxygen removing method |
| 10/02/1990 | CA1274722A1 Centrifugal pump particularly suitable for pumping fluids with a high gas content |
| 08/09/1990 | WO1990008585A1 Device for regulating and reducing a polyphasic flow, and its use |
| 08/01/1990 | CN1009017B Submersible pump |
| 05/01/1990 | US4921400 Pump and a method of separating gas by such from a fluid to be pumped |
| 04/24/1990 | CA1268078A1 Pump or compressor unit |
| 04/17/1990 | US4917577 High speed centrifugal oxygenator |
| 02/28/1990 | CN1040073A Submersible pump |
| 02/13/1990 | US4900335 Centrifugal pump wheel and method of pumping gas containing liquid by means of a centrifugal pump |
| 01/16/1990 | US4894069 Pumping |
| 12/27/1989 | EP0348342A1 Centrifugal machine with opposing rotation impellers |
| 12/13/1989 | EP0345258A1 Centrifugal pump |
| 10/18/1989 | EP0337394A2 Method and apparatus for separating gas with a pump from a medium being pumped |
| 10/12/1989 | DE3810950A1 Degassing device |
| 09/26/1989 | CA1260759A1 Bi-phased fluid pump feeder device, and hydrocarbon production installation using said device |
| 09/12/1989 | US4865519 Oil submersible pump |
| 09/12/1989 | CA1259248A1 Hydraulic turbine aeration apparatus |
| 08/08/1989 | CA1258238A1 Method and apparatus for reducing the gas content of a liquid |
| 05/16/1989 | US4830584 Pump or compressor unit |
| 05/02/1989 | US4826398 Medium consistency pump with self-feeding |
| 03/28/1989 | US4815930 Cavitating centrifugal pump |
| 01/11/1989 | EP0298693A2 Self feeding pump |
| 01/11/1989 | EP0298442A2 A pump and a method of separating gas by such from a fluid to be pumped |
| 12/28/1988 | EP0296705A2 Optical sensing arrangements |
| 12/14/1988 | EP0294573A1 Fuel delivery side channel pump |
| 10/18/1988 | US4778341 Centrifugal pump particularly suitable for pumping fluids with a high gas content |
| 07/26/1988 | CA1239681A1 Method for control of the function of a centrifugal pump |
| 06/30/1988 | WO1988004733A1 Centrifugal pump |
| 02/23/1988 | US4726734 Centrifugal pump |
| 12/15/1987 | US4712984 Process and apparatus for circulating fluids by pumping |
| 09/24/1987 | DE3705716A1 Device for pumping a liquid-gas mixture and injecting gas into it |
| 09/09/1987 | EP0236166A1 Process and installation for circulating fluids by pumping |
| 07/21/1987 | US4681510 Pump for saturated liquid |
| 06/16/1987 | US4673330 Method for control of the function of a centrifugal pump |
| 06/11/1987 | DE3542811A1 Device for conveying fluid media |
| 04/15/1987 | EP0217847A1 Pump or compressor unit. |
| 04/09/1987 | WO1987002117A1 Device for supplying a pump with a diphase fluid and plant for producing hydrocarbons comprising such a device |
| 02/24/1987 | US4645518 Centrifugal pump propelled, improved degasification |
| 02/10/1987 | US4641679 Feed device for a two-phase fluid pump and a hydrocarbon producing installation with such feed device |
| 09/25/1986 | WO1986005557A1 Pump or compressor unit |
| 12/28/1982 | US4365932 Pumping device for diphasic fluids |
| 04/20/1982 | US4325712 Method and device for conveying an essentially gaseous fluid through a pipe |
| 10/13/1981 | CA1110784A1 Procedure and equipment for injecting gas into liquids |
| 08/04/1981 | US4282062 Hydrogen into primary coolant water |
| 08/22/1978 | US4108619 Degasser spray vessel |
| 06/27/1978 | US4097253 Mud degasser trough |
| 08/16/1977 | US4041708 Method and apparatus for processing vaporous or gaseous fluids |