| Patents for F04D 27 - Control, e.g. regulation, of pumps, pumping nstallations or pumping systems specially adapted for elastic fluids (9,590) |
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| 01/10/1995 | US5379583 Closed loop stator vane control |
| 01/05/1995 | DE4321334A1 Circuit for operating (driving) an electric motor |
| 12/28/1994 | CN1096858A Stabilizing device for extending the characteristic diagram of compressor |
| 12/27/1994 | US5376867 Electronic braking device for asynchronous motors |
| 12/27/1994 | US5375974 Stabilizing device for extending the characteristic diagram of a compressor |
| 12/27/1994 | US5375412 Rotating stall recovery |
| 12/14/1994 | EP0628727A1 Gas turbine engine control based on inlet pressure distortion |
| 12/14/1994 | EP0628149A1 Control system for an air conditioning/refrigeration system |
| 12/14/1994 | EP0471688B1 An electronic control for monitoring status of a compressor |
| 12/14/1994 | CN1096347A Centrifugal compressor with a flow-stabilizing casing |
| 12/08/1994 | WO1994028313A1 Process for operating a friction vacuum pump |
| 11/30/1994 | EP0626519A1 Airflow measuring centrifugal fan |
| 11/18/1994 | CA2123640A1 Airflow measuring centrifugal fan |
| 11/17/1994 | DE4316202A1 Method of monitoring the pumping limit of a turbo-compressor with leading diffuser and trailing diffuser |
| 11/15/1994 | US5365459 Continuous stack flow rate monitor |
| 11/08/1994 | US5362207 Portable diesel-driven centrifugal air compressor |
| 11/03/1994 | DE4314059A1 Cooling fan for internal combustion engines |
| 11/02/1994 | EP0587818B1 Fan installation |
| 10/26/1994 | EP0621681A1 Method of controlling start of compressor in refrigerating cycle |
| 10/26/1994 | CN2180814Y Digital control series connection working-state changeable pump |
| 10/25/1994 | US5357748 Compressor vane control for gas turbine engines |
| 10/18/1994 | US5355691 Control method and apparatus for a centrifugal chiller using a variable speed impeller motor drive |
| 10/12/1994 | EP0545953B1 Performance characteristics stabilisation in a radial compressor |
| 10/11/1994 | CA1332294C Device for measuring the volume flow of a fan |
| 09/29/1994 | DE4408801A1 Gas-blast burner |
| 09/29/1994 | DE4309608A1 Cooling fan for an internal combustion engine |
| 09/28/1994 | EP0617355A1 Fan control |
| 09/22/1994 | DE4407969A1 Ventilator with filter clogging indication |
| 09/22/1994 | DE4336223C1 Circuit arrangement for supplying power to a fan and/or battery in a vehicle by means of a solar generator |
| 09/20/1994 | US5348450 Bootstrap method of loading a compressor having a spring loaded blowoff valve |
| 09/15/1994 | WO1994020759A1 Anti-stall tip treatment means |
| 09/13/1994 | US5347467 Load sharing method and apparatus for controlling a main gas parameter of a compressor station with multiple dynamic compressors |
| 09/07/1994 | EP0614048A1 Device with automatic burner |
| 09/07/1994 | EP0614014A1 Radial compressor with a flow stabilising casing |
| 09/07/1994 | EP0614010A1 Improvements in the regulation of fluid conditioning stations |
| 09/06/1994 | US5343708 Electronically controlled cryopump |
| 08/30/1994 | US5343384 Method and apparatus for controlling a system of compressors to achieve load sharing |
| 08/25/1994 | DE4305237A1 Cooling system for a motor vehicle |
| 08/24/1994 | CN1091183A Apparatus for and method of controlling fan |
| 08/23/1994 | US5340277 Controller for remote control ceiling fan |
| 08/23/1994 | US5340271 Flow control method and means |
| 08/18/1994 | WO1994018045A1 Hovercraft |
| 08/10/1994 | CN1090628A Automatic temperature control device for ceiling fan |
| 08/09/1994 | US5335507 Control system for an air conditioning/refrigeration system |
| 08/02/1994 | US5333990 Performance characteristics stabilization in a radial compressor |
| 07/26/1994 | CA2026471C Electrically driven, circumferentially supported fan |
| 07/20/1994 | EP0606475A1 Turbo-machine |
| 07/14/1994 | DE4300275A1 Operation of turbocompressor system |
| 07/13/1994 | EP0606108A1 Bi-directional axial-flow blower |
| 07/13/1994 | CN2171710Y Sound controller for electric fan |
| 07/12/1994 | US5327716 For extracting pressurized air from a gas turbine engine airflow path |
| 06/28/1994 | US5324167 Centrifugal fan |
| 06/22/1994 | CN2169716Y Controller for temp. difference control air exchanger |
| 06/22/1994 | CN2169715Y 多功能电扇控制器 Multifunction fan controller |
| 06/16/1994 | DE4309187C1 Controlling ventilation of data processing system - operating number and type of processing modules to calculate appropriate ventilation fan feed rate |
| 06/15/1994 | EP0601227A1 Stabilizing device for the increase of the surge margin of a compressor |
| 06/15/1994 | EP0412127B1 Method and system for controlling variable compressor geometry |
| 06/15/1994 | CN2168971Y Flow adjuster of air blower |
| 06/15/1994 | CN1025065C Operation control circuit for pump motor |
| 05/25/1994 | CN2166266Y Intelligent infrared follow-up head-oscillating unit for fan |
| 05/24/1994 | US5313779 Surge protected gas turbine engine for providing variable bleed air flow |
| 05/18/1994 | EP0597440A1 Rotating stall prevention system for compressor |
| 05/17/1994 | US5312226 Turbo compressor and method of controlling the same |
| 05/17/1994 | US5312225 Axially thrust-compensated turbo machine |
| 05/11/1994 | CN2164476Y Time-delay open type automatic wind gate |
| 05/10/1994 | CA2017311C Remote control for vacuum or ventilating system |
| 04/27/1994 | EP0593797A1 Stabilizing device for the increase of the surge margin of a compressor |
| 04/27/1994 | EP0593632A1 Radial fan. |
| 04/27/1994 | CN2163259Y Fan and pump speed governor |
| 04/26/1994 | US5306116 Surge control and recovery for a centrifugal compressor |
| 04/20/1994 | EP0593225A1 Method and apparatus for controlling a system of compressors to achieve load sharing |
| 04/20/1994 | EP0592803A1 Gear driven multi-shaft compressor with return stages and radial-expander |
| 04/20/1994 | CN2162549Y Multifunction energy-saving controller for ceiling fan |
| 04/20/1994 | CN1085646A Control system for an air conditioning/refrigeration system |
| 04/19/1994 | US5304033 Rotary compressor with stepped cover contour |
| 04/13/1994 | CN2161759Y Liquid level automatic controller for submersible pump |
| 04/13/1994 | CN2161758Y Natural wind health care energy-saving device for general electric fan |
| 04/06/1994 | CN2160779Y Natural wind controller for electric fan |
| 04/06/1994 | CN2160778Y Conducting liquid protection electric machine device |
| 03/30/1994 | EP0589745A1 Inlet control system of a turbomachine |
| 03/30/1994 | EP0588910A1 Method and apparatus for determining the total flow rate in a ventilation installation. |
| 03/30/1994 | EP0588901A1 Method and apparatus for measurement of total flow rate in ventilation installations |
| 03/29/1994 | US5297930 Rotating stall suppression |
| 03/29/1994 | US5297617 Fan assembly with heat sink |
| 03/23/1994 | EP0587818A1 Fan installation. |
| 03/22/1994 | CA1328005C Cooling fan controlling apparatus for vehicle with air conditioner |
| 03/15/1994 | US5294048 Apparatus for controlling ventilation fan |
| 03/15/1994 | US5293775 Gas turbine engine test cell |
| 03/15/1994 | US5293731 Lawn mower |
| 03/09/1994 | EP0585551A2 Speed control device for AC or three phase motor |
| 03/02/1994 | CN1083183A Rotary compressor with stepped cover contour |
| 03/01/1994 | US5290142 Method of monitoring a pumping limit of a multistage turbocompressor with intermediate cooling |
| 02/17/1994 | WO1994003864A1 Process and device for monitoring vibrational excitation of an axial compressor |
| 02/17/1994 | WO1994003863A1 Process for detecting fouling of an axial compressor |
| 02/17/1994 | WO1994003862A1 Process and device for monitoring and for controlling of a compressor |
| 02/17/1994 | CA2141592A1 Process and device for monitoring vibrational excitation of an axial compressor |
| 02/17/1994 | CA2141544A1 Process and device for monitoring and for controlling of a compressor |
| 02/17/1994 | CA2141542A1 Process for detecting fouling of an axial compressor |
| 02/16/1994 | EP0489150B1 Method and device for controlling air supply in a network of passages |
| 02/08/1994 | US5284026 Control system for an air conditioning/refrigeration system |