| Patents for F04D 15 - Control, e.g. regulation, of pumps, pumping installations, or systems (4,967) |
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| 10/02/1990 | US4961018 Enclosed pump motor and wiring thereof |
| 08/22/1990 | EP0383464A2 Pumps |
| 08/16/1990 | EP0382377A1 Fuel supply apparatus |
| 08/14/1990 | US4948344 Controlled vortex regenerative pump |
| 08/08/1990 | EP0380990A2 Reversible turbine pump |
| 08/02/1990 | DE3902378A1 Admixing unit for large-area heating installation |
| 08/02/1990 | DE3900963A1 Pumping appliance having two delivery directions |
| 07/31/1990 | US4944748 Magnetically suspended and rotated rotor |
| 07/17/1990 | US4941502 Low pressure recirculation valve |
| 07/11/1990 | EP0377223A2 Centrifugal pump especially for aquariums |
| 06/20/1990 | EP0373809A2 Ultrasonicc bilge pump control device |
| 06/07/1990 | DE3938451A1 Pressure maintenance in network heating system - involves blocking valve in case of pump power supply failure |
| 06/06/1990 | EP0371225A2 Fuel system for gas turbine engines |
| 06/06/1990 | CN2057971U Double function miniature automatic water pump |
| 05/31/1990 | DE3939360A1 Steuerung fuer die pumpe einer wasserheizanlage Control units for heating water pump of a |
| 05/22/1990 | US4926629 Low cost fuel supply system for gas turbine engines |
| 05/10/1990 | DE3900587C1 Apparatus for preliming raw sugar juice |
| 05/08/1990 | US4923366 Reversible turbine pump |
| 04/24/1990 | US4919591 Washer pump for automobiles |
| 04/24/1990 | US4919343 Anti-flooding sewage grinder pump liquid level control system in separately mounted canister |
| 04/03/1990 | US4913625 Automatic pump protection system |
| 03/28/1990 | EP0360697A1 Pumping installation, especially for irrigation |
| 03/28/1990 | EP0359901A1 Mixing device for a hot water heating installation |
| 03/28/1990 | CN1040855A Energy-saving power-limiting check valve of centrifugal pump |
| 03/20/1990 | US4909704 Barrel pump |
| 03/20/1990 | US4909076 Cavitation monitoring device for pumps |
| 03/15/1990 | DE3830542A1 Centrifugal pump |
| 03/15/1990 | DE3830196A1 Method for using phase-gating controllers as frequency converters |
| 03/15/1990 | DE3830164A1 Method for rotational speed measurement on electric motors |
| 03/07/1990 | CN1040252A 改进的离心泵 Improved centrifugal |
| 02/28/1990 | EP0355796A2 Centrifugal pump having magnetic bearing |
| 02/28/1990 | EP0355255A2 Diagnostic plug |
| 02/13/1990 | US4901070 Pressure monitoring system with isolating means |
| 02/13/1990 | US4900235 Reversible pump assembly |
| 02/06/1990 | US4898513 Circulating water system and sump pump strainer apparatus |
| 01/30/1990 | US4897022 Multi-tank/multi-pump water pressure booster system |
| 01/25/1990 | DE3824847A1 Method and device for the measurement of the power consumption difference of a pump |
| 01/25/1990 | DE3824293A1 Method for adjusting desired values in regulated pump systems |
| 01/25/1990 | DE3824057A1 Method for regulating the operation of pumps |
| 01/24/1990 | CN2051683U Special starter with water cut-off protection for diving pumps |
| 01/17/1990 | EP0351271A1 Coupling of two electrical motors |
| 01/17/1990 | EP0351013A2 Water filled container assembly and water accelerating pump |
| 01/17/1990 | CN1038858A Method and apparatus for controlling pumps in drainage system |
| 01/03/1990 | CN2050487U Automatic control of submersible pump |
| 01/02/1990 | US4890988 Canned motor pump |
| 01/02/1990 | US4890980 Centrifugal pump |
| 12/13/1989 | EP0345634A2 Variable output vortex pump |
| 11/30/1989 | DE3817018A1 Fire pump drive regulating system |
| 11/21/1989 | US4881873 Capacitance level sensor for a bilge pump |
| 11/08/1989 | EP0341108A1 Motor pump assembly comprising a flushed rear-bearing system combined with an electrical rotation direction detector |
| 11/08/1989 | EP0340696A2 Overload safety arrangement for a centrifugal pump |
| 11/08/1989 | CN2047315U Small-size oil-immersed type pump motor heat protection device |
| 10/31/1989 | US4877424 Method and apparatus for separating solids from a solids-gas mixture |
| 10/25/1989 | CN2046557U Mini fully-automatic pump |
| 10/17/1989 | US4874298 Double selectable delivery pump |
| 10/11/1989 | EP0336112A2 Reversible pump assembly |
| 09/26/1989 | US4869642 Variable output vortex pump |
| 09/13/1989 | EP0332461A1 Thrust balancing of a rotor |
| 09/06/1989 | EP0331401A2 Energy recovery pump device |
| 08/08/1989 | US4854823 Leak indicating device for centrifugal pump |
| 08/08/1989 | US4854818 Shrouded inducer pump |
| 07/11/1989 | US4847600 Son-air detector |
| 07/05/1989 | EP0322504A2 Shrouded inducer pump |
| 07/04/1989 | US4844334 Method of setting the output of a pump |
| 06/28/1989 | CN2040181U Automatic controller of a submersible pump |
| 06/21/1989 | EP0321295A2 Automatic pump protection system |
| 06/13/1989 | US4838763 Canned motor pump |
| 06/13/1989 | US4838488 Device for delivering washing liquid to two spaced spraying nozzles for moistening a windshield of a motor vehicle |
| 05/30/1989 | US4834621 Air throttling valve for submerged pump system |
| 05/09/1989 | US4828455 Temperature responsive blade shroud-disk for thermostatic water pump |
| 05/09/1989 | US4828454 Variable capacity centrifugal pump |
| 05/03/1989 | EP0314249A2 Pump off/gas lock motor controller for electrical submersible pumps |
| 04/25/1989 | US4824332 Windshield washer |
| 04/18/1989 | US4822251 Vacuum pump having an rpm-measuring device |
| 04/18/1989 | US4822241 Automatic dishwasher with a pump having a selectively adjustable impeller clearance |
| 04/18/1989 | US4822240 Compressor thrust balancer |
| 04/13/1989 | DE3733307A1 Pump |
| 04/06/1989 | DE3831142A1 Solar pump system |
| 04/04/1989 | US4818177 Centrifugal pump with integral suction valve |
| 03/16/1989 | DE3730006A1 Liquid pump, in particular a pump for a windscreen washing system of a motor vehicle |
| 03/16/1989 | DE3729025A1 Pump |
| 03/08/1989 | EP0306176A1 Improvements relating to liquid pumps |
| 02/07/1989 | US4802817 Centrifugal pump with self-regulating impeller discharge shutter |
| 01/31/1989 | US4800771 Drive assembly with overspeed brake |
| 01/25/1989 | CN1030630A Dring device with overspeed brake |
| 01/24/1989 | US4799864 Hydro-pneumatic pumpsets |
| 01/17/1989 | US4798517 Pump |
| 01/12/1989 | DE3721378A1 Centrifugal pump |
| 01/11/1989 | CN2030662U Regulator for double-cylinder mud pump |
| 12/29/1988 | DE3720360A1 Method for improving the economic efficiency of operating pressure booster facilities and the like |
| 12/28/1988 | EP0296705A2 Optical sensing arrangements |
| 12/27/1988 | US4793777 Centrifugal pump with auxiliary impeller operatively associated with a primary impeller to balance the forces on the opposite sides thereof |
| 11/09/1988 | CN87102185A Oil lubrication ball bearing shielded pump |
| 11/08/1988 | US4782696 Measuring axial pump thrust |
| 10/26/1988 | CN88101956A Automatic water supplying device and method for controlling same |
| 10/19/1988 | EP0286822A2 Magnetic pump drive |
| 10/06/1988 | DE3710318A1 Device for switching a centrifugal pump on and off, depending on a liquid level |
| 10/05/1988 | EP0285475A1 Motorpump specifically for liquid-supply systems |
| 09/22/1988 | WO1988007126A1 Drive assembly with overspeed brake |
| 09/21/1988 | EP0282956A2 Container pump |