| 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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| 06/07/1989 | CN2039038U Temp. cotrol device for electric fan |
| 06/07/1989 | CN2038959U Automatic timer variable-speed device for electric fan |
| 05/31/1989 | CN2038565U Enlarger for speed regulating range of household electric fan |
| 05/31/1989 | CN2038564U Automatic scavenger fan |
| 05/30/1989 | US4834622 Gas turbine engine/load compressor power plants |
| 05/24/1989 | CN2038163U 电风扇 Fan |
| 05/16/1989 | US4831535 Method of controlling the surge limit of turbocompressors |
| 05/16/1989 | US4831534 Method and apparatus for controlling turbocompressors to prevent |
| 05/11/1989 | DE3836647A1 Control device |
| 05/11/1989 | DE3737406A1 Control device |
| 05/10/1989 | CN2037407U Automatic speed regulator for electric fan |
| 05/09/1989 | US4827713 Stator valve assembly for a rotary machine |
| 05/02/1989 | US4825639 Control method for a gas turbine engine |
| 04/26/1989 | CN2036595U Touch type stepless speed controller for electric fan |
| 04/26/1989 | CN2036594U Natural wind controller for electric fan |
| 04/26/1989 | CN2036592U Breeze transducer for electric fan |
| 04/25/1989 | US4825380 Molecular weight determination for constraint control of a compressor |
| 04/25/1989 | US4823744 Rotation speed control device for a hydraulically operated cooling fan of an internal combustion engine |
| 04/19/1989 | CN2036218U Gentle-breeze regulator for table and floor fans |
| 04/18/1989 | CA1252770A1 Surge/stall cessation detection system |
| 04/12/1989 | CN1032381A Field regulating method of mine axial-flow fan |
| 04/05/1989 | CN2035407U Multi-function rotation rate regulator for fan natural-wind imitation |
| 04/05/1989 | CN2035406U Temp.-control automatic rotation rate regulator for fan |
| 03/28/1989 | CA1251673A1 Surge control system |
| 03/23/1989 | WO1989002581A1 A device for measuring the volume flow of a fan |
| 03/22/1989 | CN2034634U Controlling device for pendent (electric) fan |
| 03/22/1989 | CN2034633U Wind speed control device for electric fan |
| 03/22/1989 | CN2034632U Electric fan with capability of stepless selection of rotating amplitude |
| 03/08/1989 | EP0305376A1 Centrifugal superchargers |
| 03/07/1989 | US4810163 Method of controlling a turbocompressor |
| 03/07/1989 | US4809497 Gas turbine engine/load compressor power plants |
| 03/02/1989 | DE3727345A1 Air-conditioning ventilator combination for heating and cooling motor vehicles and rooms |
| 03/01/1989 | CN2033454U Electric fan automatic controlled by temperature |
| 02/28/1989 | US4808068 Used in an environmental control system |
| 02/21/1989 | US4807150 Constraint control for a compressor system |
| 02/08/1989 | CN2032274U Temp.-controlling stepless speed governor |
| 02/08/1989 | CN2032273U Automatically-controlling and adjustable multifunctional scavenging fan |
| 02/08/1989 | CN1030968A Surge control for compressor |
| 02/02/1989 | DE3724571A1 Speed-of-revolution control circuit for an electric radiator fan of an internal combustion engine |
| 02/01/1989 | EP0301993A2 A surge control for a compressor |
| 02/01/1989 | CN2031856U Multifunction controller for ceiling fan |
| 02/01/1989 | CN2031854U Wind control type adjustable-speed energy-saving electric fan |
| 01/25/1989 | EP0179824B1 Device for stirring or pumping |
| 01/25/1989 | CN2031464U Household electric-fan speed reducer |
| 01/11/1989 | EP0298895A2 Control system for a gas turbine engine |
| 01/10/1989 | US4797600 Magnetic drive control system for a multiple cooling fan installation |
| 01/04/1989 | EP0298015A2 Stator valve assembly for a rotary machine |
| 01/04/1989 | EP0297691A1 Motor and compressor combination |
| 12/28/1988 | CN87104251A Multifunctional electronic fan controller |
| 12/21/1988 | EP0296058A1 Casing of a turbine combustion chamber, comprising air outlet ports |
| 12/14/1988 | CN88202476U Multifunction remote control electrical fan |
| 12/06/1988 | US4789298 Method and apparatus for controlling the operation of a turbocompressor |
| 11/29/1988 | CA1245429A1 Guide vane ring for a return flow passage in axial fans and a method of producing it |
| 11/24/1988 | DE3810056A1 Method and device for volume-flow control |
| 11/17/1988 | DE3714842A1 Luefterantrieb fuer eine kuehlanlage, insbesondere fuer schienenfahrzeuge Luefterantrieb for a cooling installation, in particular for rail vehicles |
| 11/15/1988 | US4784580 Airflow control system |
| 11/01/1988 | US4781530 Compressor range improvement means |
| 11/01/1988 | US4781524 Method and apparatus for detecting pressure surges in a turbo-compressor |
| 10/26/1988 | CN87214961U Infrared remote controller for electric fan |
| 10/05/1988 | CN86210005U Controller of electrical fan |
| 10/05/1988 | CN86206615U Digital step speed regulating electric fan |
| 09/27/1988 | USRE32756 Pre-swirl inlet guide vane for compressor |
| 09/21/1988 | CN87212518U Driving mechanism capable of adjusting swing angle of electric fan |
| 09/13/1988 | US4770602 Method of capacity controlling of multistage compressor and apparatus therefor |
| 09/07/1988 | EP0280911A2 Ventilator part and method of testing it |
| 08/31/1988 | CN88100310A Vacuum distributor |
| 08/24/1988 | CN86207414U Electronic-clock controlling electric fan |
| 08/17/1988 | EP0278226A1 Method and apparatus for detecting pressure surges in a turbo-compressor |
| 08/11/1988 | DE3702952A1 Method and arrangement for regulating a fan drive |
| 08/09/1988 | US4762463 Fan having speed indicator |
| 08/09/1988 | CA1240381A1 Transient gas turbine engine bleed control |
| 07/05/1988 | US4755105 Impeller improvement |
| 06/30/1988 | DE3710640C1 Method and device for limit-value control of a fan |
| 06/21/1988 | US4752182 Device for the open- or closed-loop control of gas turbine engines or turbojet engines |
| 06/21/1988 | US4752138 Device for stirring or pumping |
| 06/21/1988 | CA1238395A1 Self-optimizing, capacity control system for inverter-driven centrifugal compressor based water chillers |
| 06/08/1988 | EP0270474A1 Electrically commutated, variable speed compressor control system |
| 06/07/1988 | US4749338 Use as a combustion air blower for motor vehicle heaters |
| 06/07/1988 | US4749331 Method and apparatus of detecting pumping surges on turbocompressors |
| 05/24/1988 | CA1237182A1 Capacity control systems for inverter-driven centrifugal compressor based water chillers |
| 05/11/1988 | CN87201470U Automatic safety exhaust fan |
| 05/10/1988 | US4743161 Compressors |
| 04/26/1988 | US4740138 Device for controlling the throat areas between the diffusor guide vanes of a centrifugal compressor of a gas turbine engine |
| 04/13/1988 | CN87202624U Multifunctional electronic-controlled fan |
| 04/07/1988 | DE3448204C2 Fan |
| 03/29/1988 | US4734628 Electrically commutated, variable speed compressor control system |
| 03/29/1988 | US4734012 Blower speed control |
| 03/23/1988 | CN87201973U Electric fan for imitating natural wind |
| 02/04/1988 | DE3625662A1 Blower |
| 02/02/1988 | US4722669 Fan speed controller |
| 01/28/1988 | DE3623696A1 Compressor with devices for preventing surging |
| 01/27/1988 | CN87201256U Infrared rays remote controlled speed varying device |
| 01/19/1988 | US4720245 Flow rate control system in fluid supply and drain apparatus |
| 01/19/1988 | US4720235 Turbine engine with induced pre-swirl at the compressor inlet |
| 01/19/1988 | US4719758 Device for changing the direction of an airflow entering through the intake of a compressor of an exhaust gas turbo-charger |
| 01/11/1988 | WO1988005870A1 Ventilator part and method for its functional control |
| 01/05/1988 | CA1230978A1 Compressor bleed valve |
| 12/30/1987 | WO1987006981A3 Centrifugal superchargers |
| 12/30/1987 | CN87201738U Multipurpose speed regulator for pendent fan |
| 12/29/1987 | US4715779 Bleed valve for axial flow compressor |