| 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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| 05/08/2001 | US6226974 Method of operation of industrial gas turbine for optimal performance |
| 04/26/2001 | DE10035829A1 Ventilating unit especially for stall ventilation, has speed of motor adjusted by alterating and operating voltage and actual volume flow is determined |
| 04/25/2001 | EP1093943A2 A system for controlling an electric motor of a fan associated with heat exchangers in a motor vehicle |
| 04/25/2001 | CN2427656Y Means for controlling electric fan with music function |
| 04/25/2001 | CN2427655Y Manual, dynamic and variable blade type axial-flow air blower |
| 04/25/2001 | CN2427654Y Electric, dynamic and variable blade axial-flow air blower |
| 04/25/2001 | CN1065029C NC serial operating mode change centrifugal fan |
| 04/24/2001 | US6220086 Method for ascertaining surge pressure ratio in compressors for turbines |
| 04/24/2001 | US6220012 Booster recirculation passageway and methods for recirculating air |
| 04/17/2001 | US6217288 Method and apparatus for limiting a critical variable of a group of compressors or an individual compressor |
| 04/11/2001 | EP1091129A1 Passive surge control method for compression systems and relative device |
| 04/11/2001 | CN1291123A Diagnosing and controlling rotating stall and surge in rotating machinery |
| 04/10/2001 | US6213724 Method for detecting the occurrence of surge in a centrifugal compressor by detecting the change in the mass flow rate |
| 04/10/2001 | US6212770 Method of forming a roller assembly |
| 03/29/2001 | DE19945824A1 Control device for electrically-driven fans, especially for motor vehicle air conditioner reduces temperature thresholds, the greater the rate of change of temperature |
| 03/27/2001 | US6207447 Damper and blower unit providing reversible aeration for composting |
| 03/27/2001 | US6205771 Ducted fan gas turbine engine control system |
| 03/21/2001 | CN1288112A Electric shutter type vetilation fan |
| 03/20/2001 | US6203276 Illuminated controls for air moving products |
| 03/20/2001 | US6202431 Adaptive hot gas bypass control for centrifugal chillers |
| 03/15/2001 | DE10017861A1 Störungsüberwachung Fault monitoring |
| 03/13/2001 | US6200107 Vacuum pumping systems |
| 03/13/2001 | US6200098 Speed limited fan |
| 03/07/2001 | EP1081380A1 Device and method for evacuation |
| 03/07/2001 | CN1286360A Health-care intermittent electric fan |
| 03/06/2001 | US6196789 Compressor |
| 02/28/2001 | EP0789976A4 Improved air control system for an air bed |
| 02/28/2001 | CN2421435Y Outwash angle regulator for electric fan |
| 02/28/2001 | CN2421434Y Self-controlled air cooler for computer room |
| 02/27/2001 | US6194858 Speed control device of cooling fans and method of control thereof |
| 02/27/2001 | US6193470 Method of operating a radial compressor set with intake and discharge flow control |
| 02/21/2001 | CN1284779A Controllable cooling device for turbo-generator |
| 02/20/2001 | US6190125 Suction flow preswirl control bypass structure for blowers |
| 02/20/2001 | US6189799 Automatic occupancy and temperature control for ceiling fan operation |
| 02/15/2001 | WO2001011748A1 Malfunction detection of a machine driven by an electric motor |
| 02/15/2001 | DE19938319A1 Method and circuit for controlling RPMs in an electric motor driving a ventilating fan in a gaseous hot spa has a power input for an electrical energy source and a signal input for a sensor to detect noise, vibration or its mechanical load. |
| 02/14/2001 | CN2419401Y Controller for controlling rotation speed of electric fan by temperature |
| 02/13/2001 | US6188189 Fan speed control system |
| 02/13/2001 | US6186744 Volumetric airflow indicator and control device |
| 02/08/2001 | WO2001009517A1 Turbocharger |
| 02/08/2001 | WO2001009488A1 Blade clearance control for turbomachinery |
| 02/07/2001 | EP1074747A2 Ducted fan gas turbine engine control system |
| 02/06/2001 | US6184640 DC brushless motor, magnetic bearing device and turbomolecular pump device |
| 02/06/2001 | US6183201 Safety blade for ceiling fan |
| 02/06/2001 | US6183195 Single slot impeller bleed |
| 02/01/2001 | WO2001007791A1 Turbo fluid machinery and dry gas seal used for the machinery |
| 01/31/2001 | CN1281953A Turbomachine |
| 01/18/2001 | WO2001004496A1 Control system for cooling fan assembly having variable pitch blades |
| 01/18/2001 | DE19933202A1 Method for operating multi-phase compressor especially for refrigerating plants uses computer-calculated speed combinations for comparing ideal value and actual value of cold water header temperature for selecting right combination |
| 01/18/2001 | DE19844643C1 Automatic braking device for ventilator fan blades |
| 01/17/2001 | EP1069315A2 Turbo machines |
| 01/17/2001 | EP1069314A1 Control of a compressor unit |
| 01/17/2001 | EP0723630B1 Axially opening cylindrical bleed valve |
| 01/11/2001 | DE19931664A1 Regelbare Kühleinrichtung für Turbogeneratoren Adjustable cooling device for turbogenerators |
| 01/10/2001 | EP1067292A2 Adjustable cooling system for turbogenerators |
| 01/10/2001 | EP0722539B1 Bleed valve |
| 01/10/2001 | CN2414230Y Wiring structure improved switch box |
| 01/04/2001 | CA2376788A1 Supercharging system for gas turbines |
| 01/03/2001 | CN1060253C Rotary machine controller and control method thereof |
| 12/27/2000 | EP1063402A2 Method of operation of industrial gas turbine for optimal performance |
| 12/26/2000 | US6164911 Low aspect ratio compressor casing treatment |
| 12/26/2000 | US6164902 Controlling stall margin in a gas turbine engine during acceleration |
| 12/26/2000 | US6164901 Method and device for operating turbocompressors with a plurality of controllers that interfere one with each other |
| 12/26/2000 | US6164242 Method of regulating the vacuum level in a milking apparatus, and a milking apparatus |
| 12/26/2000 | US6164057 Gas turbine generator having reserve capacity controller |
| 12/21/2000 | DE10019606A1 Drive control apparatus of cooling fan used in hydraulic powered machine e.g. construction machinery, controls capacity of hydraulic motor and pump based on difference between actual and target values of fan speed |
| 12/20/2000 | EP1061787A2 System with fan speed synchronization control |
| 12/20/2000 | CN2411367Y Timing speed regulation electric fan |
| 12/19/2000 | US6163266 Fan operation detection circuit for a DC fan and method of operation thereof |
| 12/07/2000 | DE19920524A1 Radial flow compressor to compress gas stream has rotor with blades on hub arranged in casing, with flow channel formed between rotor and casing and has ring in flow channel with wall slits |
| 12/06/2000 | EP1056613A1 System for energy recovery in electric fans for car radiators |
| 12/06/2000 | EP0779831A4 Close coupled series turbine mounting |
| 11/22/2000 | CN2407165Y Electronic timing speed regulator for hanging fan |
| 11/15/2000 | EP1052376A2 Tip sealing method for compressors |
| 11/07/2000 | US6142142 Method, apparatus and system for safely and efficiently controlling a ventilation hood |
| 11/07/2000 | US6141951 Control system for modulating bleed in response to engine usage |
| 11/02/2000 | DE19918907A1 Electronic switching device for fan motor drive in vehicle, has control circuit with input unit for user settings, and electromechanical coupler having stepper motor with two gearwheels for generating linear movement |
| 10/25/2000 | EP1046786A2 Helical flow compressor/turbine permanent magnet motor/generator |
| 10/24/2000 | US6134911 Compressor for use in refrigerator |
| 10/19/2000 | CA2301415A1 Helical flow compressor/turbine permanent magnet motor/generator |
| 10/17/2000 | CA2156879C Air conditioner |
| 10/12/2000 | WO2000060428A1 System for regulating pressure in a vacuum chamber, vacuum pumping unit equipped with same |
| 10/12/2000 | WO2000060276A1 Seal-gas valve device |
| 10/11/2000 | EP1043645A1 Pressure control system for a vacuum chamber, vacuum pumping unit provided with such a system |
| 10/11/2000 | CN1269470A Automatic axial flow fan |
| 10/10/2000 | US6129511 Method and apparatus for controlling interaction between variable guide vanes and variable diffuser of a centrifugal compressor |
| 10/10/2000 | US6129286 Ventilation system, particularly for use in the agricultural field |
| 10/10/2000 | CA2198754C Close coupled series turbine mounting |
| 10/05/2000 | WO2000058628A1 Vacuum pump |
| 10/05/2000 | DE19914282A1 Locking gas valve device, with pressure reducer between inlet and narrow point |
| 10/05/2000 | DE19913593A1 Controlled pump assembly with high vacuum, pilot pumps has control unit that switches on pilot pump based on pilot pressure, opens valve when pilot pressure exceeds upper threshold |
| 10/04/2000 | EP1041290A2 Gas turbine starting method |
| 09/28/2000 | DE19913818A1 Heating device for vehicles comprises motor with actuating blower and fan wheel while the rotational axis has three signal givers mounted to the fan wheel with spacing |
| 09/27/2000 | EP1039139A1 Blower with characteristic curve |
| 09/27/2000 | EP1039137A2 Turbo-molecular pump |
| 09/27/2000 | CN1267783A Multistage turbocompressor |
| 09/26/2000 | US6122905 Compressor bleed valve |
| 09/20/2000 | EP1036924A2 Gas turbine generator having reserve capacity controller |
| 09/19/2000 | US6119738 Inflating device |
| 09/13/2000 | EP1034950A2 Control device for heating or air conditioning apparatus of a motor vehicle |