| 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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| 10/18/2001 | US20010029907 Twin fan control system and method |
| 10/17/2001 | CN2454987Y Fan motor of controlling rotational speed by pulse working period |
| 10/17/2001 | CN2454986Y Temp.-control speed-changing fan motor |
| 10/16/2001 | US6302643 Turbo machines |
| 10/16/2001 | US6302640 Axial fan skip-stall |
| 10/11/2001 | WO2001075305A1 Gas compression system and method utilizing gas seal control |
| 10/11/2001 | US20010028839 Method and apparatus for expanding operating range of centrifugal compressor |
| 10/10/2001 | EP1143149A2 Method and apparatus for expanding operating range of centrifugal compressor |
| 10/04/2001 | EP1138952A1 Method for the early detection of aerodynamic instabilities in a turbomachine compressor |
| 10/03/2001 | CN2451777Y Petal type regulating gate |
| 10/03/2001 | CN2451776Y Regulating gate controller for ventilator |
| 10/03/2001 | CN1315779A DC fan driving circuit |
| 10/02/2001 | US6297608 Drive circuit for a speed automatically adjusted fan |
| 10/02/2001 | US6296451 Process and installation for the regulation of a central unit for the production of medical vacuum |
| 10/02/2001 | CA2034375C Method and apparatus for controlling a blower motor in an air handling system to provide constant pressure |
| 09/27/2001 | WO2001071195A1 Fan with compound control and method of operating such a fan |
| 09/27/2001 | WO2001071194A1 Curved blower conduit |
| 09/27/2001 | US20010024615 Control circuit for a heat-dissipation fan |
| 09/26/2001 | EP1136679A2 Compressor bleed-air system |
| 09/26/2001 | CN2450413Y Two-stage rotating speed controlled fan motor |
| 09/25/2001 | US6293766 Process for operating a compressor with a downstream user, and unit operating according to this process |
| 09/25/2001 | US6293753 Air moving apparatus and method of optimizing performance thereof |
| 09/20/2001 | US20010022940 Turbo-compressor |
| 09/20/2001 | US20010022938 Process for protecting a turbocompressor from operating in the unstable working range |
| 09/20/2001 | DE10012380A1 Verfahren zum Schutz eines Turbokompressors vor Betrieb im instabilen Arbeitsbereich Method of protecting a turbocompressor against operation in the unstable working range |
| 09/19/2001 | EP1134427A1 Turbo machines |
| 09/19/2001 | EP1134422A2 Turbo compressor surge control method |
| 09/18/2001 | US6292763 Methods for designing variable cycle gas turbine engines |
| 09/18/2001 | US6290458 Turbo machines |
| 09/18/2001 | CA2224747C Combination valve for screw compressors |
| 09/13/2001 | WO2001066913A1 Air moving apparatus and method of optimizing performance thereof |
| 09/13/2001 | DE10010623A1 Fan for generating air flow to be fed into interior of motor vehicle has drive transistor thermally coupled to fan motor and transistor cooling element thermally coupled to motor |
| 09/12/2001 | EP1132223A1 Fan for generating an airstream into a vehicle and vehicle air conditioner comprising such a fan |
| 09/12/2001 | EP1131561A1 Low aspect ratio compressor casing treatment |
| 09/12/2001 | EP0871853A4 Surge prevention control system for dynamic compressors |
| 09/12/2001 | CN1312439A Air compressor |
| 09/11/2001 | US6288510 Drive controller for motor-driven high-speed rotating body and method for discriminating type of machine used therefor |
| 09/06/2001 | DE10052726A1 Mehrmotoranordnung und Verfahren zu deren Steuerung More motor assembly and method for controlling same |
| 09/05/2001 | EP1130305A2 Flow restrictor for turbine engines |
| 09/05/2001 | CN2446312Y 吊扇 Ceiling fan |
| 09/04/2001 | US6285157 Fan cooler |
| 09/04/2001 | US6285150 Method for controlling the operating voltage of a fan in electrical equipment |
| 09/04/2001 | CA2205210C Recirculating diffuser |
| 08/30/2001 | US20010018026 Helical flow compressor/turbine permanent magnet motor/generator |
| 08/30/2001 | DE10007669A1 Verfahren zur Regelung eines Verdichters, insbesondere eines Verdichters im Ansaugtrakt einer Brennkraftmaschine Method for controlling a compressor, in particular a compressor in the induction tract of an internal combustion engine |
| 08/29/2001 | EP1128070A2 Compressor |
| 08/23/2001 | US20010016160 Turbo-molecular pump |
| 08/23/2001 | US20010015629 Structure of plural motor assembly and method for controlling the same |
| 08/16/2001 | US20010014837 Method for the early detection of aerodynamic instabilities in a turbomachine compressor |
| 08/16/2001 | US20010014280 Process and device for regulating a turbocompressor to prevent surge |
| 08/16/2001 | EP1123457A2 Gas turbine engine |
| 08/16/2001 | DE10004473A1 Air flow detector, has signal transducer that generates an electrical signal indicating the flow of air when the impeller rotates due to air coming from a ventilator |
| 08/15/2001 | CN2443180Y Changeable polar multi-speed axial-flow ventilating fan special for tunnel construction |
| 08/15/2001 | CN2443179Y Pneumatic blade changeable axial-flow fan |
| 08/15/2001 | CN1069741C Apparatus and method for controlling fan |
| 08/14/2001 | US6273671 Blade clearance control for turbomachinery |
| 08/09/2001 | US20010012485 Electronically controlled cryopump |
| 08/08/2001 | CN2442008Y Timed automatic speed regulator |
| 08/08/2001 | CN1307388A Fan protector |
| 07/26/2001 | DE10003018A1 Turbocompressor; has rotor shaft in casing with free shaft end projecting into closed pressure chamber and acted upon by pressurised fluid to compensate for force on bladed wheel on other shaft end |
| 07/26/2001 | DE10002293A1 Method for operating multi-stage compressor especially in refrigerating systems involves constantly calculating mean value of condenser pressure and adding or subtracting a tolerance value in intervals |
| 07/25/2001 | EP1002361B1 Circuit for controlling a fan |
| 07/19/2001 | WO2001051816A1 Method for calculating characteristic curve of centrifugal fluid machine by computer |
| 07/19/2001 | WO2001051815A1 Method for selecting centrifugal fluid machine by computer |
| 07/19/2001 | WO1999051866A3 Compressor endwall bleed system |
| 07/19/2001 | DE10001365A1 Regulating turbo compressor to prevent pumping involves using different delay time constants for increasing/decreasing difference signal for slower changes towards pump limiting line |
| 07/18/2001 | EP1116885A2 Method and apparatus to control a turbo compressor to prevent surge |
| 07/18/2001 | EP1115963A2 Gas turbine engine |
| 07/18/2001 | EP0839285B1 Compressor stall and surge control using airflow asymmetry measruement |
| 07/18/2001 | CN2439556Y Fair wind device for electric fan |
| 07/18/2001 | CN1304067A heat control system for testing and measuring device |
| 07/12/2001 | WO2001050024A1 Method and system for optimizing the performance of a rotodynamic multi-phase flow booster |
| 07/12/2001 | DE10062534A1 Control system for cooling fans for earth-moving machine uses electronic control receiving signals from temperature sensors for independent adjustment of each cooling fan |
| 07/05/2001 | WO2001049093A1 Fan speed control system |
| 07/04/2001 | CN2437883Y Automatic pressure fan |
| 07/04/2001 | CN2437882Y 定时自动转速装置 Automatic speed timing devices |
| 07/03/2001 | US6253716 Control system for cooling fan assembly having variable pitch blades |
| 06/27/2001 | CN2436698Y Intelligent scavenger fan |
| 06/20/2001 | CN2435546Y Controller for electric fan |
| 06/13/2001 | EP1107093A2 Thermal control for a test and measurement instrument |
| 06/13/2001 | EP1106786A2 Vent valve for a compressor, especially for a dual flux jet engine |
| 06/13/2001 | EP1105964A1 Circuit for regulating the rotational speed of a fan |
| 06/13/2001 | DE19959596A1 Abblaseventil eines Verdichters, insbesondere für ein Zweistrahl-Flugtriebwerk Relief valve of a compressor, particularly for a two-beam aircraft engine |
| 06/13/2001 | CN2434458Y Pneumatic variable wing hub |
| 06/13/2001 | CN2434457Y Mechanical variable wing hub |
| 06/12/2001 | CA2174617C Use of centrifugal compressors in adsorptive systems |
| 06/07/2001 | DE19952519A1 Control method for ventilator, for bathroom or shower cubicle; involves calculating saturation pressure and dew point temperature in cold part of room from steam pressure inside and outside room |
| 06/07/2001 | DE10040496A1 Circuitry controlling fan speed by variation in drive current, comprises computer and Hall effect sensor in addition to external speed control input |
| 06/07/2001 | DE10040495A1 An automatic drive circuit for a ventilation fan has a temperature sensor and current control to regulate the fan speed according to the surrounding temperature. |
| 06/06/2001 | EP1067292A9 Adjustable cooling system for turbogenerators |
| 06/06/2001 | CN2433433Y 空气压缩机 Air compressor |
| 06/05/2001 | US6241463 Method for determining the operating level of a fan and fan |
| 05/30/2001 | EP1103725A2 Processing tip treatment bars in a gas turbine engine |
| 05/30/2001 | EP1102886A1 Control system for a vacuum pump used for removing liquid and a method of controlling said pump |
| 05/30/2001 | EP1102654A1 Diagnosing and controlling rotating stall and surge in rotating machinery |
| 05/23/2001 | EP1101037A1 Rotation device with drive motor |
| 05/17/2001 | WO2001034983A1 Axial fan |
| 05/15/2001 | US6231306 Control system for preventing compressor stall |
| 05/15/2001 | US6231301 Casing treatment for a fluid compressor |
| 05/10/2001 | CA2325701A1 System and method for automatic thermal protection of a fluid compressing system |