| Patents for F04C 28 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids (4,928) |
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| 07/19/2011 | US7980085 Compressor diagnostic system |
| 07/13/2011 | EP2343457A1 Screw compressor |
| 07/13/2011 | EP2342462A2 Method for operating an oil-tight vacuum pump and oil-tight vacuum pump |
| 07/13/2011 | EP1963678B1 A screw compressor |
| 07/13/2011 | CN102124229A Rotary compressor |
| 07/13/2011 | CN102121473A Scroll machine with continuous capacity modulation |
| 07/06/2011 | CN201891606U Screw compressor with air volume regulating block |
| 07/06/2011 | CN1955477B Multi-stage rotary compressor |
| 07/06/2011 | CN102119277A Compressor and air-conditioner having the same |
| 07/06/2011 | CN102119276A Vacuum pumping systems |
| 06/30/2011 | WO2011077724A1 Single-screw compressor |
| 06/30/2011 | WO2011077657A1 Screw compressor |
| 06/29/2011 | EP2339179A2 Rotary compressor |
| 06/29/2011 | CN201884284U Control system for soft start and soft stop of screw pump |
| 06/23/2011 | WO2011038176A3 Crankcase heater systems and methods for variable speed compressors |
| 06/22/2011 | CN102105694A Variable capacity type rotary compressor, cooling apparatus having the same, and method for driving the same |
| 06/22/2011 | CN101624987B Rotary compressor and application thereof |
| 06/22/2011 | CN101440808B Oil surface control device of horizontal rotary compressor |
| 06/16/2011 | US20110144944 Compressor diagnostic and protection system and method |
| 06/16/2011 | DE102010053340A1 Scrollkompressor-Kapazitätsmodulation mit Elektromagnet- und Fluid-Hybridsteuerung Scroll compressor capacity modulation with solenoid and fluid hybrid control |
| 06/16/2011 | DE102010053280A1 Kompressorleistunggssteuerungsverfahren und Vorrichtung zur Leistungssteuerung eines Kompressors Kompressorleistunggssteuerungsverfahren and apparatus for power controlling a compressor |
| 06/15/2011 | CN102099582A Vacuum pump in particular roots type pump |
| 06/15/2011 | CN101285469B Sliding component and swirl motor compressor using the same |
| 06/15/2011 | CN101178069B Compressor unit |
| 06/09/2011 | US20110135509 Scroll compressor capacity modulation with hybrid solenoid and fluid control |
| 06/09/2011 | CA2772289A1 Method for controlling a compossed device and compossed device wherein such method is applied |
| 06/08/2011 | CN201858153U Variable-frequency energy-saving automatic control system of embryo-absorbing roots blower |
| 06/08/2011 | CN201858152U Variable-frequency energy-saving control system of screw air compressor |
| 06/08/2011 | CN101660529B On-line control method of screw compressor |
| 06/07/2011 | US7955062 Vane pump |
| 06/07/2011 | US7955056 Method for controlling a compressed air installation comprising several compressors, control box applied thereby and compressed air installation applying this method |
| 06/01/2011 | CN101553663B A vacuum pump provided with a device for its deactivation |
| 05/31/2011 | US7950911 Single stage root type-vacuum pump and vacuum fluid transport system employing the single stage root type-vacuum pump |
| 05/26/2011 | WO2011061429A2 Method and device for pumping with reduced power use |
| 05/26/2011 | DE102009053268A1 Air conditioning system for motor vehicle, has air-conditioning compressor controlled with predetermined compressor stroke in thrust phase when actual speed of vehicle is lesser than predetermined speed limit value |
| 05/25/2011 | CN101397998B Slide holding device of rotary compressor and control method thereof |
| 05/19/2011 | WO2011058848A1 Rotary vane compressor |
| 05/19/2011 | WO2011057348A1 Improved fluid compressor and/or pump arrangement |
| 05/19/2011 | WO2011057345A1 Fluid compressor or pump apparatus |
| 05/18/2011 | CN102062095A Starting equipment for roots blower |
| 05/12/2011 | WO2011055444A1 Heat pump device, two-stage compressor, and method of operating heat pump device |
| 05/11/2011 | EP2318716A1 Variable capacity type rotary compressor, cooling apparatus having the same, and method for driving the same |
| 05/11/2011 | CN1963215B Volume variable rotating compressor |
| 05/11/2011 | CN1963213B Volume varying device for rotating blade type compressor |
| 05/11/2011 | CN102052320A Method for calibrating pneumatic actuators and calibrated actuator obtainable with this method |
| 05/11/2011 | CN102052316A Outer rotor vortex permanent magnet frequency conversion screw compressor system |
| 05/11/2011 | CN101498302B Mode changing apparatus for a scroll compressor |
| 05/11/2011 | CN101205913B Power variable device of scroll compressor |
| 05/04/2011 | EP2317147A1 Compressor and air-conditioner having the same |
| 05/04/2011 | EP2137810B1 A control system for a compressor actuated by an electric motor |
| 05/04/2011 | CN102042226A Screw compressor having slide valve with flexible volume ratio |
| 05/04/2011 | CN101052808B Capacity varying type rotary compressor |
| 04/28/2011 | WO2011048618A1 Screw compressor with variable compression ratio |
| 04/27/2011 | CN1896519B Compound compressors |
| 04/27/2011 | CN102037243A Electric compressor |
| 04/27/2011 | CN102037218A A vane with tilting tips, and a rotary displacement pump using this vane |
| 04/27/2011 | CN102032187A Control method and application of cold energy variable type rotary compressor |
| 04/27/2011 | CN102032181A Scroll compressor with axial displacement regulation |
| 04/27/2011 | CN101375063B Vacuum pump unit |
| 04/20/2011 | EP2312166A1 Vane pump with a supplementary suction passage |
| 04/20/2011 | EP2310684A1 Vacuum pump in particular roots type pump |
| 04/20/2011 | CN201802624U Automatic screw air compressor |
| 04/13/2011 | CN201794790U Control system for screw air compressor |
| 04/13/2011 | CN1656319B Methods and apparatus for unloading a screw compressor |
| 04/13/2011 | CN102016321A Compressor |
| 04/13/2011 | CN101634500B Refrigeration cycle system |
| 04/07/2011 | WO2011040039A1 Screw compressor |
| 04/07/2011 | DE102009037277A1 Adjustable vacuum pump i.e. vane type pump, for gasoline engine of e.g. passenger car, has rotatably mounted rotor with blade that is movably supported in rotor, and adjusting device adjusting stator relative to rotor |
| 04/06/2011 | EP2306021A1 Electric compressor |
| 04/06/2011 | EP2304241A2 Automatic volume ratio variation for a rotary screw compressor |
| 04/06/2011 | EP2304239A1 Vacuum pumping systems |
| 04/06/2011 | EP2304182A1 A vane with tilting tips, and a rotary displacement pump using this vane |
| 04/06/2011 | CN201786656U Variable displacement compressor |
| 04/06/2011 | CN1993552B Capacity variable type rotary compressor and driving method thereof |
| 04/06/2011 | CN102003392A Dual-sliding vane rotary compressor, control method and application thereof |
| 04/06/2011 | CN101776079B Automatic torque compensation system and automatic torque compensation method |
| 04/06/2011 | CN101235815B Multistage compressor |
| 04/06/2011 | CN101203677B 旋转式真空泵 Rotary vacuum pump |
| 03/31/2011 | WO2011038176A2 Crankcase heater systems and methods for variable speed compressors |
| 03/30/2011 | EP1486676B1 Scroll compressor |
| 03/30/2011 | CN201779019U Air inlet flow adjusting valve of high-displacement screw air compressor |
| 03/30/2011 | CN201779018U Oil pressure control air inlet valve for oilless screw compressor |
| 03/22/2011 | CA2520823C Method for controlling a compressed air installation comprising several compressors, control box applied thereby and compressed air installation applying this method |
| 03/17/2011 | WO2010058182A3 Screw compressor |
| 03/16/2011 | EP1960668B1 Apparatus for detecting a flammable atmosphere within a compressor, in particular a vacuum pump |
| 03/16/2011 | CN201763607U Interlocking anti-reverse-rotation device of desulfuration roots machine |
| 03/16/2011 | CN201763606U Growth screw compressor controller |
| 03/15/2011 | US7905098 Compressor diagnostic and protection system and method |
| 03/10/2011 | US20110058972 Scroll compressor capacity modulation with solenoid mounted outside a compressor shell |
| 03/09/2011 | CN101469703B Compressor |
| 02/24/2011 | WO2010135290A3 Diagnostic system |
| 02/23/2011 | EP2287444A1 Rotary screw compressor with improved volume ratio regulation means |
| 02/23/2011 | CN201751640U 气动机械式断油阀 Mechanical pneumatic valve off oil |
| 02/23/2011 | CN1950613B System and method for variable speed operation of a screw compressor |
| 02/23/2011 | CN101981318A Safety valve for compressor |
| 02/22/2011 | US7891956 Rotary compressor |
| 02/17/2011 | DE102008063132B4 Verfahren zur Identifizierung eines Typs einer Vakuumpumpe A method for identifying a type of vacuum pump |
| 02/16/2011 | EP2284463A2 Digital controller for scroll compressor condensing unit |
| 02/16/2011 | EP2284462A2 Compressor diagnostic system |
| 02/16/2011 | CN201746317U Automatic control device of H2 purifying equipment |