| 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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| 08/25/2004 | EP1450046A2 Method for operation of turbocompressors with surge limitation regulation |
| 08/25/2004 | CN2635954Y Separating type positive and negative rotation controller for ceiling fan |
| 08/25/2004 | CN2635953Y Radiation structure for servo |
| 08/24/2004 | US6782301 Method for selecting centrifugal fluid machine by computer |
| 08/24/2004 | US6779981 Fan control system using a microcontroller |
| 08/19/2004 | US20040159103 System for detecting and compensating for aerodynamic instabilities in turbo-jet engines |
| 08/19/2004 | DE10245798B4 Elektrisch betriebener Ladeluftverdichter mit integrierter Luftkühlung Electrically driven charge air compressor with integrated air cooling |
| 08/19/2004 | DE10230242B4 Verfahren zum Betreiben einer Gebläseeinrichtung in einem Gargerät und Gargerät zum Durchführen dieses Verfahrens Method for operating a blower unit in a cooking appliance and cooking device for performing this method |
| 08/18/2004 | EP1446581A2 Management and optimization of load sharing between multiple compressor trains for controlling a main process gas variable |
| 08/18/2004 | CN2634153Y Automatic switching fault detecting and anti-explosion alarm device for double fan |
| 08/18/2004 | CN1521405A Method and apparatus for controlling operating efficiency of water pump fan of control speed regulator |
| 08/18/2004 | CN1521404A Method for controlling operating efficiency of water pump fan for industrial controller and configuration software |
| 08/12/2004 | US20040156714 Recirculation structure for turbo chargers |
| 08/12/2004 | DE202004009381U1 Control circuit for brushless direct current fan motor has full range of operational and protective functions |
| 08/12/2004 | DE10304063A1 Verfahren zum sicheren Betreiben von Turbokompressoren mit einer Pumpgrenzregelung und einem Pumpgrenzregelventil A method for the safe operation of turbo compressors with a surge control and a surge control valve |
| 08/12/2004 | DE10256008B3 Turbomachine e.g. compressor or water turbine, with relative movement of blade rear edges of guide grid blades upon alignment of blade front edges with flow direction |
| 08/11/2004 | EP1444428A1 Method and apparatus for adaptive acceleration schedules in gas turbine engine control systems |
| 08/10/2004 | US6773235 Rotodynamic multi-phase flow booster pump |
| 08/10/2004 | US6773224 Control method of plural compressors and compressor system |
| 08/10/2004 | US6772599 Stability control system and method for compressors operating in parallel |
| 08/05/2004 | US20040151583 Control for cooling fan |
| 08/05/2004 | US20040151576 Process for the reliable operation of turbocompressors with surge limit control and surge limit control valve |
| 08/04/2004 | EP1442222A1 Vacuum pump |
| 08/04/2004 | CN2630536Y Multifunctional combustion-supporting fan |
| 07/29/2004 | WO2004063676A1 Portable airflow meter |
| 07/29/2004 | US20040146410 Vacuum pump system |
| 07/29/2004 | DE10302764A1 Vakuumpumpsystem The vacuum pumping system |
| 07/28/2004 | EP1441128A2 Vacuum pump system |
| 07/28/2004 | EP1440242A2 Smoke protection for rooms |
| 07/28/2004 | CN1159530C Health-care intermittent electric fan |
| 07/27/2004 | US6768624 Fan protection |
| 07/27/2004 | US6767186 Fan with automatic failure mode |
| 07/22/2004 | US20040143418 Apparatus for predicting life of rotary machine and equipment using the same |
| 07/22/2004 | US20040139859 Fan blade cut off system |
| 07/21/2004 | CN2627247Y 电风扇共享输入输出控制装置 Fans shared input and output control unit |
| 07/21/2004 | CN1158503C Adaptive hot gas bypass control method and device for centrifugal chillers |
| 07/14/2004 | EP1436510A1 Method for optimizing the operation of several compressor units in a natural gas compression station |
| 07/14/2004 | CN1512075A Feedback control method and device for air valume of fan-filter unit |
| 07/08/2004 | DE10261790A1 Strömungsmaschinenanordnung Fluid Machinery arrangement |
| 07/08/2004 | DE10261789A1 Vorleitstator für Strömungsmaschinen Vorleitstator for Fluid Machinery |
| 07/08/2004 | DE10257642A1 Motor vehicle double blower fan device wherein the two blowers can be controlled independently by use of a fan control unit and a temperature regulated switch |
| 07/08/2004 | DE10256962A1 Lüfter Fan |
| 07/06/2004 | US6758044 Control system for positioning compressor inlet guide vanes |
| 07/01/2004 | WO2004055378A1 Vacuum pumping arrangement and method of operating same |
| 07/01/2004 | WO2004055377A1 Vacuum pumping system and method of operating a vacuum pumping arrangement |
| 06/30/2004 | EP1433958A2 Upstream stator for turbomachine |
| 06/30/2004 | EP1433929A2 Turbomachine arrangement |
| 06/29/2004 | US6755620 Independent rotational speed control of multi-stage variable speed compressor |
| 06/29/2004 | US6755617 Method for the early detection of aerodynamic instabilities in a turbomachine compressor |
| 06/29/2004 | US6755028 Electronically controlled cryopump |
| 06/29/2004 | US6755025 Pneumatic compressor bleed valve |
| 06/24/2004 | WO2004053336A1 Variable geometry diffuser mechanism |
| 06/22/2004 | US6752588 Vacuum pump |
| 06/17/2004 | WO2004051090A1 Fan |
| 06/17/2004 | DE202004006109U1 Hydraulikaggregat Hydraulic unit |
| 06/17/2004 | DE202004001978U1 Timer controlled temperature differential circuit for ventilator control in cellars or rooms with high air humidity, in which series circuit of timer control and analog temperature differential circuit switches load, i.e. ventilator |
| 06/16/2004 | EP1429032A2 A centrifugal compressor having inlet guide vanes |
| 06/16/2004 | CN2620784Y Simulation natural wind controller for electric fan |
| 06/10/2004 | US20040109757 Variable geometry diffuser mechanism |
| 06/09/2004 | EP1425517A1 Device and method used to automatically compensate for synchronous disturbances |
| 06/09/2004 | EP1157214B1 Compressor bleeding using an uninterrupted annular slot |
| 06/09/2004 | CN2620116Y Automatic scavenger fan |
| 06/09/2004 | CN1502816A Device and method for preventing compressor inverse rotation |
| 06/08/2004 | US6748162 Ventilation system for a motor vehicle |
| 06/08/2004 | US6747432 Drive apparatus for cooling fan motor for use in vehicle |
| 06/03/2004 | WO2004046509A1 Variable nozzle for turbocharger |
| 06/01/2004 | US6742983 Compressor casing structure |
| 06/01/2004 | US6742324 Methods and apparatus for supporting variable bypass valve systems |
| 05/27/2004 | WO2004044466A1 Valve |
| 05/27/2004 | US20040101412 Process and device for flow control of an electrical motor fan |
| 05/27/2004 | US20040100035 Active seal assembly |
| 05/27/2004 | DE10252942A1 Blasgerät Blower |
| 05/27/2004 | DE10252767A1 Compressor in induction tract of internal combustion engine has blocking element that acts on spin device at auxiliary channel opening so blocking element control movement displaces spin device |
| 05/27/2004 | CA2505973A1 Valve |
| 05/26/2004 | EP1421251A2 Cooling fan, in particular for motor vehicles |
| 05/25/2004 | US6739846 Stacked redundant blowers |
| 05/25/2004 | US6739840 Speed control of variable speed pump |
| 05/21/2004 | WO2004042289A2 Boiler |
| 05/20/2004 | US20040096342 Blower |
| 05/20/2004 | US20040096316 Pre-whirl generator for radial compressor |
| 05/19/2004 | EP1420146A1 Prewhirl generator for radial compressor |
| 05/19/2004 | DE202004000994U1 Ventilating fan for installation into an assembly opening in a casing wall with components wasting heat has a blower and a dirt filter |
| 05/19/2004 | CN2616728Y Ceiling fan remote control device |
| 05/19/2004 | CN2616727Y Fan speed control device for CPU radiator |
| 05/18/2004 | US6737824 Fan acceleration control |
| 05/18/2004 | US6736608 Heat-dissipating fan with manually adjustable speed-setting |
| 05/18/2004 | US6736593 Protective device for a turbo molecular pump and method of protecting a turbo molecular pump |
| 05/18/2004 | US6735955 Control system for positioning compressor inlet guide vanes |
| 05/12/2004 | EP1151230A4 Adaptive hot gas bypass control for centrifugal chillers |
| 05/12/2004 | CN2615393Y Quantitative inflator for balloon |
| 05/12/2004 | CN2615392Y Remoto-control speed regulator for hanging fan |
| 05/12/2004 | CN2615391Y Temperature controlling fan with protection control |
| 05/06/2004 | WO2004038229A1 Method for operating a compressor in the region of the compressor pumping point, and compressor |
| 05/06/2004 | US20040086389 System for controlling pressure with an electronic engine controller, and related methods |
| 05/06/2004 | US20040086385 Fan with automatic failure mode |
| 05/06/2004 | DE10249471A1 Verfahren zum Betreiben eines Verdichters im Bereich der Verdichter-Pumpgrenze und Verdichter A method of operating a compressor in the compressor surge margin and compressor |
| 05/04/2004 | US6729858 Thrust bearing cooling unit for a turbo compressor |
| 05/04/2004 | US6729844 Controller for variable pitch fan system |
| 04/29/2004 | US20040081569 Molecular pump and flange |
| 04/29/2004 | US20040081564 Electromagnetic device capable of controlling the revolving speed of a multi-fan assembly |