| Patents for F04D 15 - Control, e.g. regulation, of pumps, pumping installations, or systems (4,967) |
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| 04/06/1994 | EP0590761A1 System for protecting a liquid pump |
| 04/06/1994 | CN2160777Y Remote-control switch for submersible pump |
| 04/06/1994 | CN2160776Y Automatic protection controller for centrifugal pump |
| 03/31/1994 | WO1994007032A1 Pump protecting slide valve |
| 03/31/1994 | DE4230697A1 Min. flow quantity valve for pump system - with auxiliary valve section ensuring min. flow quantity when pump load is disconnected |
| 03/31/1994 | CA2099549A1 System for protecting a liquid pump |
| 03/29/1994 | US5297940 Sealless pump corrosion detector |
| 03/29/1994 | US5297939 Automatic control for bilge & sump pump |
| 03/23/1994 | CN2159466Y Remote controller for electric underwater pump |
| 03/03/1994 | WO1994004789A1 Downhole tandem pump system |
| 03/02/1994 | EP0584713A1 Method of controlling an electric motor driving a centrifugal pump |
| 03/01/1994 | US5290157 Clamp for attaching an aquarium power head |
| 02/22/1994 | US5287875 Draining pump system and drainage preference operating method therefor |
| 02/17/1994 | DE4318158A1 Coolant pump for vehicle IC engine - has vented leakage chamber with lead-off channel to suction side of pump |
| 02/16/1994 | CN2156322Y Automatic switch for pipe pump |
| 02/01/1994 | US5282727 Aquarium power head with integral muffler |
| 01/26/1994 | EP0580558A1 Device for the control of elevating pumps in a drainage installation or similar |
| 01/26/1994 | CN2154367Y Auto-controlled valve of reflux for efficient auto-suck pump |
| 01/26/1994 | CN1023618C Balance piston and seal arrangement |
| 01/18/1994 | CA1326297C Method and apparatus for measuring differential fluid power output of a pump |
| 01/11/1994 | US5277543 Device for monitoring abrasion loss of a thrust bearing in a submerged motor pump |
| 12/22/1993 | EP0574516A1 Pumping station |
| 12/22/1993 | CN2150367Y Return-controlling device for automatic water-supplying water pump |
| 12/09/1993 | DE4222394C1 Electric pump unit with cooled frequency regulator - has power stage of frequency regulator mounted on cooling wall between spiral pump housing and electric motor |
| 12/08/1993 | CN2148840Y Protector for electric pump under oil |
| 12/07/1993 | US5267798 Bearing assembly |
| 12/01/1993 | CN1079033A Electromechanic integrate digit control boiler water feeding pump group |
| 12/01/1993 | CN1079031A Sleeve water supply pump for high storied building |
| 11/16/1993 | US5261437 Method and apparatus for monitoring and analyzing recirculation control system performance |
| 11/16/1993 | CA2068591C Variable speed hydromassage pump control |
| 11/10/1993 | CN2145883Y Soft starting control device for water feeding pump |
| 11/02/1993 | US5257911 Windscreen washer pump provided with level sensing device |
| 10/28/1993 | DE4213184A1 Underwater pump for raising water via ascending tube - has sealed compartment to ensure pumping unit is always immersed when pump is idle |
| 10/12/1993 | US5252025 Drainage pump |
| 10/06/1993 | EP0563052A1 Pump mounting apparatus for filtration system |
| 10/06/1993 | CN1077004A Digital-control boosting metering distribution pump |
| 09/28/1993 | US5248940 Apparatus for measuring changes in radial and/or axial position of a rotor in a drive system including an emf producing stationary conductor |
| 09/28/1993 | US5248085 Gas boiler |
| 09/14/1993 | US5244351 System for protecting a liquid pump |
| 09/01/1993 | CN2141473Y Submerged pump integral comprehensive protector |
| 08/31/1993 | US5240621 Centrifuging |
| 08/31/1993 | US5240380 Variable speed control for centrifugal pumps |
| 08/25/1993 | CN2140986Y Self-control non-return pipe pump |
| 08/24/1993 | US5238369 Liquid level control with capacitive sensors |
| 08/24/1993 | US5238117 Mineral processing screen separator |
| 08/17/1993 | US5237310 Pump monitor |
| 08/11/1993 | EP0425613B1 Double-acting pump, in particular for windscreen wiper systems in motor vehicles |
| 08/10/1993 | US5234319 Sump pump drive system |
| 08/03/1993 | US5232334 Rotary machine having an axial abutment that retracts automatically by means of a flexible membrane subjected to the pressure of a fluid |
| 07/22/1993 | WO1993014450A1 Device for regulating the flow rate of a centrifugal pump in a closed network of pipes |
| 07/22/1993 | DE4300560A1 Control for hot water circulating pump - has sensors for input temperature and input pressure to pump and with microprocessor control to prevent cavitation |
| 07/22/1993 | DE4201100A1 Einrichtung zur regelung des foerderstroms einer kreiselpumpe in geschlossenem rohrnetz Means for control of foerderstroms a centrifugal pump in a closed pipe network |
| 07/20/1993 | US5228829 Method and apparatus for dividing flow of high-consistency fiber suspension |
| 07/20/1993 | US5228802 Underground drainage facility and operation method therefor |
| 07/15/1993 | DE4200507A1 Variable flow machine for pump or turbine installation - has adjustment disc to vary impeller width and slots to vary housing flow cross=section. |
| 07/14/1993 | CN2138204Y Underwater electric pump with automatic protector |
| 07/07/1993 | EP0549738A1 Pumps |
| 07/06/1993 | US5224835 Shaft bearing wear detector |
| 06/30/1993 | EP0549439A1 Method and apparatus for optimising the transport of multiphase flows by pumping |
| 06/24/1993 | DE4142120A1 Coolant pump with movable ring for IC engine - has cross=section of flow into pump rotor adjustable in accordance with engine temp. and load |
| 06/22/1993 | US5221189 Soft start fire pump controller |
| 06/22/1993 | US5220793 Centrifugal pump fuel system |
| 06/17/1993 | DE4240513A1 Drain pump for fluids, esp. in domestic appliance, e.g. dishwasher, washing machine - has phase-gate controller for single phase permanent magnet motor running at reduced voltage after starting period |
| 06/10/1993 | WO1993011360A1 Centrifugal pump with adaptor for various valves |
| 06/09/1993 | EP0563052A4 Pump mounting apparatus for filtration system. |
| 06/02/1993 | EP0538409A4 Fuel-bundle inversion for dual-phase nuclear reactors |
| 06/02/1993 | CN2135075Y Self-control protector for low-voltage working water pump |
| 06/02/1993 | CN2135074Y Automatic switch for domestic water pump |
| 05/26/1993 | EP0542835A1 Method and apparatus for improving flotation separation |
| 05/26/1993 | CN1020943C Low pressure recirculation valve |
| 05/25/1993 | US5213477 Pump delivery flow rate control apparatus |
| 05/19/1993 | EP0541929A1 Gas pumping system with liquid elimination feature |
| 05/19/1993 | DE3645260A1 Pump with double-walled split-tube magnetic clutch - has film in space between walls, visible from exterior as evidence of damage or liq. contact. |
| 05/19/1993 | CN2133694Y Controllor for fire water pump |
| 05/18/1993 | US5211530 Variable breadth impeller that provides a specific shutoff head |
| 05/12/1993 | EP0541046A1 Propeller pump with blade pitch adjustment |
| 05/06/1993 | DE4136348A1 Reversible rotary pump - has pot-shaped pump and pressure-chambers in common housing with mouths at sides and shut by covers |
| 04/28/1993 | EP0538409A1 Fuel-bundle inversion for dual-phase nuclear reactors |
| 04/28/1993 | EP0538407A1 Nuclear reactor with bi-level core |
| 04/28/1993 | EP0538400A1 Reactor-core isolation cooling system with dedicated generator |
| 04/28/1993 | CN2130947Y Integrated injection cylinder type seal box |
| 04/22/1993 | DE4134055A1 Adjusting reducing gear for turbo machine - has take-off shaft, connected to sun wheel, and reduction stage with three planet wheels, meshing with sun wheel and hollow wheel |
| 04/20/1993 | US5204053 Bi-level fuel management method for boiling-water nuclear reactor |
| 04/14/1993 | CN2129835Y Automatic control cut-out on water failure |
| 04/13/1993 | US5202084 Bi-level reactor including steam separators |
| 04/13/1993 | US5201633 Vertical centrifugal hydraulic pump assembly |
| 03/30/1993 | US5197859 Well pump system |
| 03/17/1993 | CN1020124C Pump system operable by variable-speed control |
| 03/10/1993 | EP0530518A1 Turbo machine |
| 03/10/1993 | CN1069796A Monitor of water pump without watchman |
| 03/03/1993 | EP0529353A1 Gasboiler |
| 03/02/1993 | US5190443 Hydropneumatic constant pressure device |
| 03/02/1993 | US5190442 Electronic pumpcontrol system |
| 02/25/1993 | DE4128032A1 Rotary pump for handling boiling cryogenic liquids - has inducer drive mounted on hollow shaft of pump and uses inducer running at different speed from pump |
| 02/25/1993 | DE4127822A1 Gas boiler for central heating and water heating |
| 02/24/1993 | EP0528726A1 Process and apparatus for controlling a pumping station and modular detection device for such a station |
| 02/17/1993 | EP0527630A1 Nuclear reactor comprising steam separator and two axially arranged cores |
| 02/16/1993 | US5186610 Buoyant pump assembly |
| 02/16/1993 | US5186606 Double feed pump, in particular for windshield washer systems in motor vehicles |
| 02/09/1993 | CA1313558C Method of setting the output of a pump |