| 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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| 02/03/1994 | WO1994002742A1 Rotary compressor with stepped cover contour |
| 02/02/1994 | CN1023656C Axial-flow blower |
| 01/26/1994 | CN1081238A Multi-function automatic monitoring scavenger fan |
| 01/18/1994 | US5279109 Gas turbine engine variable bleed pivotal flow splitter |
| 01/11/1994 | US5277541 Vaned shroud for centrifugal compressor |
| 01/05/1994 | EP0576859A1 Turbo machine with axial dry gas seal |
| 01/05/1994 | DE4221950A1 Vehicle power supply circuit for radiator fan motor for water-cooled engine - f couples sensors e.g. for zero Celsius temp. sensor and refrigerant compressor pressure to earth, and trigger circuits for relay switches to positive and switched to earth. |
| 01/05/1994 | DE4220962A1 Radial flow blower or compressor - has adjustable flow control zone with stepped profile |
| 01/05/1994 | DE4220503A1 Refrigerator or freezer with temp.-responsive control of fan - benefits from energy-saving with fan switched-off below temp. threshold, and run at low speed during compression of refrigerant |
| 01/04/1994 | US5275528 Flow control method and means |
| 12/29/1993 | EP0576238A1 Load sharing method and apparatus for controlling a main gas parameter of a compressor station with multiple dynamic compressors |
| 12/23/1993 | CA2098941A1 Load sharing method and apparatus for controlling a main gas parameter compressor station with multiple dynamic compressors |
| 12/22/1993 | CN2150370Y Centrifugal refrigerating compressor |
| 12/15/1993 | CN2149501Y Device for controlling wind from electric fan step by step |
| 12/14/1993 | US5269660 Method and an installation for adjusting the flow rate of air in a network of ducts |
| 12/14/1993 | US5269136 Sub-idle stability enhancement and rotating stall recovery |
| 12/07/1993 | US5267452 Back pressure valve |
| 11/25/1993 | WO1993023673A1 Centrifugal fan having variable width blades |
| 11/18/1993 | EP0570114A1 Control system for prime driver of compressor and method |
| 11/10/1993 | EP0436673B1 Electronically controlled cryopump |
| 11/09/1993 | US5259188 Method and system to increase stall margin |
| 10/28/1993 | DE4213047A1 Radial compressor for vehicle exhaust gas turbocharger - uses feed pipe to deliver flow medium to influence conditions in circulation chamber |
| 10/26/1993 | US5256039 Remote controlled moveable fan |
| 10/13/1993 | EP0565373A2 Method and apparatus for detecting and preventing fluid surge in a centrifugal compressor |
| 09/28/1993 | USRE34388 Method and apparatus for detecting stalls |
| 09/21/1993 | US5246335 Compressor casing for turbocharger and assembly thereof |
| 09/21/1993 | CA2015393C Compressor control system to improve turndown and reduce incidents of surging |
| 09/16/1993 | WO1993018356A1 Control system for an air conditioning/refrigeration system |
| 09/16/1993 | CA2131453A1 Control system for an air conditioning/refrigeration system |
| 09/15/1993 | CN2142156Y Switch of governor for fan |
| 09/15/1993 | CN2142155Y Electronic adjustable-speed fan |
| 09/14/1993 | CA1322105C Electronically controlled cryopump |
| 09/08/1993 | CN1022059C Oscillation angle adjuster for electric fan |
| 09/07/1993 | US5242263 Device for the control of anti-surge of a compressor |
| 09/01/1993 | CN2141476Y Temp. different time controlling rotation rate regulator |
| 08/25/1993 | CN2140988Y Electric fan puffer |
| 08/18/1993 | EP0556091A1 Ventilating device for a motor vehicle interior |
| 08/18/1993 | EP0555795A1 Device for the optimization of the performance of a fan supplying air to a burner |
| 08/17/1993 | US5236307 Variable geometry rotors for turbo machines |
| 08/17/1993 | US5236301 Centrifugal compressor |
| 08/17/1993 | US5235801 On/off surge prevention control for a variable geometry diffuser |
| 08/11/1993 | CN1075195A 背压阀 Backpressure valve |
| 08/05/1993 | WO1993015322A1 Linear actuator for a bleed valve |
| 08/04/1993 | EP0553935A1 Electronically controlled cryopump |
| 08/03/1993 | US5232152 Range hood fan with atmospheric humidity sensor |
| 08/03/1993 | US5231825 Method for compressor air extraction |
| 07/28/1993 | CN2139186Y Ceiling fan speed regulator with timer |
| 07/27/1993 | US5230605 Axial-flow blower |
| 07/27/1993 | US5230603 Control of flow instabilities in turbomachines |
| 07/15/1993 | DE4200507A1 Variable flow machine for pump or turbine installation - has adjustment disc to vary impeller width and slots to vary housing flow cross=section. |
| 07/14/1993 | EP0550801A2 Turbo compressor and method of controlling the same |
| 07/07/1993 | EP0550381A1 Back pressure valve |
| 07/06/1993 | US5224836 Control system for prime driver of compressor and method |
| 07/06/1993 | US5224819 Cooling air pick up |
| 06/30/1993 | EP0549004A1 An electronic braking device for asynchronous motors |
| 06/30/1993 | CN2137299Y Energy-saving axial fan |
| 06/30/1993 | CN2137298Y Centrifugal ventilator |
| 06/30/1993 | CN1073752A Remote-control device for electric fan |
| 06/29/1993 | US5222356 Modulating surge prevention control for a variable geometry diffuser |
| 06/16/1993 | CN1021272C Multifunctional controller for electric fan without interference |
| 06/08/1993 | US5216877 Linear actuator for a bleed valve |
| 06/02/1993 | EP0543908A1 Flow control method and means. |
| 06/01/1993 | US5215433 Axial fan |
| 05/27/1993 | DE4138440A1 Laundry dryer - has drive motor and radial ventilator to reduce heating when drum is not full |
| 05/11/1993 | US5209633 High pressure compressor flowpath bleed valve extraction slot |
| 05/11/1993 | CA1317467C Turbine engine with induced pre-swirl at the compressor inlet |
| 05/04/1993 | US5207557 Centrifugal fan having variable width blades |
| 04/28/1993 | EP0539285A1 Control device for opening and closing bleed valves of a turbomachine |
| 04/28/1993 | EP0538627A1 Blower |
| 04/20/1993 | US5203179 Control system for an air conditioning/refrigeration system |
| 04/15/1993 | WO1993007392A1 Turbo-machine |
| 04/14/1993 | CN2129839Y Temperature control electric fan |
| 03/31/1993 | EP0534462A1 Contamination resistant bleed valve |
| 03/30/1993 | US5197862 Method and device for monitoring radon mitigation system |
| 03/30/1993 | US5197858 Thermal control variable speed DC brushless fan |
| 03/23/1993 | US5195875 Antisurge control system for compressors |
| 03/10/1993 | EP0530770A1 Method for operating an electric motor |
| 03/10/1993 | EP0530518A1 Turbo machine |
| 03/09/1993 | US5191673 Remote control device vacuum or ventilation system |
| 03/04/1993 | DE4129211A1 Motor-driven radial ventilator fan for air conditioner - has pyramidal deflector funnel extending outwards in downstream direction from rim of intake nozzle to casing around fan wheel outlet |
| 03/04/1993 | DE4129210A1 Motor-driven radial ventilator fan for air conditioner - has adjustable axial gap, broadened or narrowed according to volume flow set-point by intake-pressure-dependent fan wheel displacement |
| 03/03/1993 | EP0529248A1 Metering device |
| 02/24/1993 | CN2127439Y 自然风调速器 Natural wind governor |
| 02/16/1993 | US5186601 Compressor shroud air bleed arrangement |
| 02/10/1993 | EP0526965A2 Compressor casings for turbochargers |
| 02/10/1993 | CN2126880Y Electric fan for electricity stopped |
| 02/10/1993 | CN2126879Y Special no-brush rotary blade fan for automobile and ship |
| 02/09/1993 | CA1313550C Electrically commutated, variable speed compressor control system |
| 02/03/1993 | EP0525972A1 Lawn mower |
| 01/21/1993 | WO1993001414A1 Radial fan |
| 01/19/1993 | US5180278 Surge-tolerant compression system |
| 01/14/1993 | DE4122631A1 Regulating operation of compressor - adjusting RPM or setting guide vanes according to desired value delivered by process regulator |
| 01/12/1993 | US5178000 Cover |
| 01/06/1993 | CN2126526Y Axial flow compressor |
| 01/06/1993 | CN2126525Y High effective centrifugal compressor |
| 12/29/1992 | US5174729 Control system for controlling surge as a function of pressure oscillations and method |
| 12/29/1992 | US5174545 Contamination resistant bleed valve |
| 12/23/1992 | WO1992022791A1 Method and apparatus for determining the total flow rate in a ventilation installation |
| 12/23/1992 | WO1992022790A1 Method and apparatus for measurement of total flow rate in ventilation installations |
| 12/22/1992 | US5173021 Compressors |