| 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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| 03/18/1997 | US5611664 Apparatus to achieve passive damping of flow disturbances in a centrifugal compressor to control compressor surge |
| 03/12/1997 | EP0761981A2 Turbomachinery with variable-angle flow guiding vanes |
| 03/11/1997 | US5609016 Gas turbine apparatus and method of operating same on gaseous fuel |
| 03/09/1997 | CA2184882A1 Turbomachinery with variable-angle flow guiding vanes |
| 03/05/1997 | CN1144554A Process for controlling driving voltage of fan in electrical equipment |
| 03/04/1997 | US5607284 Baffled passage casing treatment for compressor blades |
| 02/25/1997 | US5605437 Compressor and method of operating it |
| 02/25/1997 | US5605435 Method and apparatus to achieve passive damping of flow disturbances in a centrifugal compressor to control compressor surge |
| 02/19/1997 | CN1143172A Electronic controlled lamp/fan power supplied by battery |
| 02/13/1997 | WO1997005383A1 Circulator pump check valve |
| 02/12/1997 | CA2177944A1 Permanent magnet motor driven compressor |
| 02/05/1997 | EP0757180A1 Method and device for operating turbomachines with controllers having a high proportional gain |
| 02/04/1997 | US5599161 Method and apparatus for antisurge control of multistage compressors with sidestreams |
| 01/29/1997 | EP0656996B1 Linear actuator for a bleed valve |
| 01/23/1997 | WO1997002082A1 Close coupled series turbine mounting |
| 01/22/1997 | EP0754275A1 System including a vacuum pump, measuring device and supply, control, operating and display equipment |
| 01/21/1997 | US5595474 Pitch variation control device for the blades of a turbomachine rotor and method of operating the device |
| 01/16/1997 | WO1997001270A1 A method of regulating the vacuum level in a milking apparatus, and a milking apparatus |
| 01/14/1997 | US5594665 Process and device for monitoring and for controlling of a compressor |
| 01/14/1997 | US5594312 Apparatus having an automatic firing arrangement |
| 01/08/1997 | EP0752065A1 Process for controlling the driving voltage of a fan in electrical equipment |
| 01/03/1997 | WO1997000381A1 Compressor stall and surge control using airflow asymmetry measurement |
| 01/02/1997 | EP0751280A1 Flow aligned plenum endwall treatment for compressor blades |
| 12/31/1996 | US5590146 Gas laser |
| 12/27/1996 | EP0750118A1 Method and device for securing the availability of gas seals in turbo compressors |
| 12/24/1996 | US5586861 Airflow measuring centrifugal fan |
| 12/24/1996 | US5586859 Flow aligned plenum endwall treatment for compressor blades |
| 12/24/1996 | US5586857 Rotating stall prevention system for compressor |
| 12/12/1996 | WO1996039583A1 Method of controlling the function of a centrifugal pump and vacuum pump combination, and a gas-separating centrifugal pump |
| 12/04/1996 | CN2241785Y Computer controller for full-regulating axial flow pump |
| 11/28/1996 | WO1996037707A1 Apparatus for preventing reverse operation of compressor |
| 11/26/1996 | CA2106270C Turbine engine air supply regulating system, centrifugal compressor comprising a regulating system, and auxiliairy power unit comprising said compressor |
| 11/21/1996 | WO1996037035A1 Electric motor drive |
| 11/21/1996 | WO1996037034A1 Electric drive system for railway vehicles and guided vehicles |
| 11/21/1996 | WO1996037033A1 Electric drive system for railway vehicles and guided vehicles |
| 11/20/1996 | EP0743458A2 Variable speed centrifugal compressors for adsorption systems |
| 11/20/1996 | CN1033336C Fully automatic controller for dual direction ventilating fan |
| 11/14/1996 | DE19516276A1 Side channel blower |
| 11/13/1996 | EP0588910B1 Apparatus for determining the total flow rate in a ventilation installation |
| 11/12/1996 | US5573382 Multi-speed electric fan |
| 10/31/1996 | WO1996034207A1 Compressor stall diagnostics and avoidance |
| 10/24/1996 | DE19514707A1 Flow guide unit for radial compressor |
| 10/22/1996 | US5567393 Aggregate for producing fresh air stream |
| 10/16/1996 | CN1133404A Air compressor end wall treatment |
| 10/15/1996 | US5564899 Engine cooling system with blade angle controllable cooling fan |
| 10/10/1996 | DE19513136A1 Control for multi-pump pressure network |
| 10/09/1996 | EP0736142A1 Non-recoverable surge and blowout detection in gas turbine engines |
| 10/09/1996 | CN1132828A Turbomachinery having veriable angle flow guiding device |
| 10/08/1996 | US5562404 Vaned passage hub treatment for cantilever stator vanes |
| 10/03/1996 | WO1996030649A1 Circulating blower, vacuum pump or the like |
| 10/02/1996 | DE19612192A1 Dental suction device with multiple suction points for dentist's chair |
| 10/02/1996 | DE19511430A1 Umwälzgebläse, Vakuumpumpe oder dergleichen Circulating blower, vacuum pump or the like |
| 09/25/1996 | EP0733159A1 Closed loop stator vane control |
| 09/25/1996 | EP0651859B1 Rotary compressor with stepped cover contour |
| 09/24/1996 | US5557930 Drive unit having an electric motor |
| 09/24/1996 | US5557917 Method of equalizing air pressure in a turbine engine air inlet |
| 09/18/1996 | EP0732509A2 Apparatus for detecting and preventing fluid surge in a centrifugal compressor |
| 09/18/1996 | EP0732508A2 Method and apparatus for detecting and preventing fluid surge in a centrifugal compressor |
| 09/18/1996 | EP0732507A2 Method and apparatus for detecting and preventing fluid surge in a centrifugal compressor |
| 09/18/1996 | EP0543908B1 Flow control method and means |
| 09/17/1996 | US5555749 Use of centrifugal compressors in adsorptive systems |
| 09/10/1996 | US5553997 Control method and apparatus for a centrifugal chiller using a variable speed impeller motor drive |
| 08/29/1996 | DE19517959C1 Propulsion drive for rail and track-mounted vehicle |
| 08/21/1996 | CN2233600Y Automatic water supply unit controlled by proportional-plus-integral controller |
| 08/21/1996 | CN1129306A Air conditioner |
| 08/01/1996 | DE19502907A1 Electrically driven air-blower unit with shut=off valve e.g. for motor vehicle exhaust extraction |
| 07/31/1996 | EP0723630A1 Axially opening cylindrical bleed valve |
| 07/31/1996 | EP0723625A1 Active tip flow bypass in stator vane channel |
| 07/30/1996 | US5541857 Process and device for monitoring vibrational excitation of an axial compressor |
| 07/25/1996 | DE19501816A1 Radial blower for blow burner |
| 07/24/1996 | EP0722539A1 Bleed valve |
| 07/23/1996 | US5537830 In a water chiller system |
| 07/18/1996 | DE19500679A1 Control for extended time runs for ventilator, staircase light timing and roller shutter |
| 07/16/1996 | US5536141 Method and apparatus to achieve passive damping of flow disturbances in a centrifugal compressor to control compressor surge |
| 07/03/1996 | EP0719944A2 Turbomachinery having a variable angle flow guiding device |
| 07/03/1996 | EP0719908A1 Baffled passage casing treatment for compressor blades |
| 07/03/1996 | EP0719907A1 Tip shroud assembly for gas turbine engine |
| 07/03/1996 | CN2230370Y Stall-proof device for axial-flow fan |
| 07/02/1996 | US5531566 For a gas turbine engine |
| 07/02/1996 | US5531565 Appliance for extracting secondary air from an axial compressor |
| 06/29/1996 | CA2166249A1 Turbomachinery having variable angle flow guiding device |
| 06/27/1996 | DE4446621A1 Frequenzgeregelter Stellmotor Frequency-controlled servomotor |
| 06/26/1996 | EP0718469A1 Compressor hub |
| 06/20/1996 | WO1996018848A1 Control circuit for a fan drive motor |
| 06/20/1996 | DE4444810A1 Steuerschaltung für einen Gebläseantriebsmotor Control circuit for a fan drive motor |
| 06/18/1996 | US5528229 Thermostatically controlled remote control for a ceiling fan and light |
| 06/13/1996 | WO1996018236A1 Device for regulating the speed of a fan or pump |
| 06/12/1996 | EP0716218A1 Compressor shroud |
| 05/28/1996 | US5520508 Compressor endwall treatment |
| 05/28/1996 | US5520507 Method and apparatus to achieve passive damping of flow disturbances in a centrifugal compressor to control compressor surge |
| 05/22/1996 | EP0378570B1 A device for measuring the volume flow of a fan |
| 05/15/1996 | DE4440495A1 Electrically operated air-blower unit as unit e.g. for blowing secondary air into IC engine exhaust system |
| 05/14/1996 | US5516265 Interface apparatus for permitting microprocessor-based electronic control of non-electronically controlled air compressors |
| 05/14/1996 | US5515673 Device for controlling the opening and closing of discharge valves of a turbojet engine |
| 05/09/1996 | WO1996013947A1 Improved air control system for an air bed |
| 05/01/1996 | CN2226166Y Multifunctional emergent electric fan |
| 04/24/1996 | EP0527841B1 Air control valve |
| 04/23/1996 | US5509154 Air control system for an air bed |
| 04/18/1996 | WO1996011340A1 Combined bleed valve and annular diffuser for gas turbine inter compressor duct |
| 04/16/1996 | US5508943 Method and apparatus for measuring the distance of a turbocompressor's operating point to the surge limit interface |