Class F04D : NON-POSITIVE-DISPLACEMENT PUMPS
Subclass 1/10: Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Multi-stage pumps (F04D 1/02 takes precedence) with means for changing the flow-path through the stages, e.g. series/parallel
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11788533 | Multistage centrifugal pump | Jun 29, 22 | Oct 17, 23 | SULZER MANAGEMENT AG |
| 11415138 | Intermediate bearing in electrical submersible pump | Aug 05, 20 | Aug 16, 22 | Baker Hughes Oilfield Operations LLC |
| 11339793 | Fan flow directing features, systems and methods | Jun 25, 19 | May 24, 22 | Apple Inc. |
| 10816008 | Dual stage grinder pump | Apr 10, 19 | Oct 27, 20 | Not available |
| 10578110 | Centrifugal pump with coalescing effect, design method and use thereof | Jan 02, 14 | Mar 03, 20 | Typhonix AS |
| 10337516 | Multi-stage, self-priming centrifugal pump assembly | Apr 29, 14 | Jul 02, 19 | GRUNDFOS HOLDING A/S |
| 10280924 | Pump and method for changing the pumping capacity of a pump | Sep 16, 16 | May 07, 19 | SULZER MANAGEMENT AG |
| 10138816 | Fuel pumping unit | Sep 18, 15 | Nov 27, 18 | Rolls Royce plc |
| 9932991 | Active swirl device for turbocharger compressor | Apr 04, 16 | Apr 03, 18 | Ford Global Technologies, LLC |
| 9803644 | Back-to-back centrifugal pump | Dec 02, 13 | Oct 31, 17 | NUOVO PIGNONE SRL |
| 9133849 | Impeller vane with leading edge enhancement | Nov 09, 12 | Sep 15, 15 | BAKER HUGHES INCORPORATED |
| 9051840 | Wall of turbo machine and turbo machine | Mar 28, 08 | Jun 09, 15 | IHI CORPORATION, THE SOCIETY OF JAPANESE AEROSPACE COMPANIES, |
| 8801360 | Centrifugal pump with thrust balance holes in diffuser | Sep 09, 10 | Aug 12, 14 | BAKER HUGHES INCORPORATED |
| 8388302 | Coupling turbochargers for passive pre-swirl counter-rotation | Aug 31, 09 | Mar 05, 13 | BORGWARNER INC. |
| 8287236 | Multistage centrifugal compressor | May 08, 08 | Oct 16, 12 | HITACHI, LTD. |
| 8267648 | Compact low noise efficient blower for CPAP devices | Dec 02, 10 | Sep 18, 12 | RESMED MOTOR TECHNOLOGIES INC |
| 8172515 | Turbo vacuum pump | Feb 04, 09 | May 08, 12 | EBARA CORPORATION |
| 6210105 | Flow directing device for a medium consistency pump | Nov 27, 98 | Apr 03, 01 | Irish & Asssociates |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2021/0048,029 | Intermediate Bearing In Electrical Submersible Pump | Aug 05, 20 | Feb 18, 21 | Baker Hughes Oilfield Operations LLC |
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