| 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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| 04/16/2009 | WO2009048578A1 Variable speed compressor protection system and method |
| 04/16/2009 | WO2009048575A1 Compressor protection system and method |
| 04/16/2009 | WO2009048566A2 System and method for monitoring overheat of a compressor |
| 04/16/2009 | WO2008034551A8 A rotary pump with vanes |
| 04/15/2009 | EP2048365A2 Operation control device for vacuum pump and method for stopping operation thereof |
| 04/15/2009 | EP2047103A1 Screw compressor capacity control |
| 04/15/2009 | CN201221470Y Oil temperature control device of screw rod air compressor |
| 04/08/2009 | EP1701039B1 Scroll fluid machinery |
| 04/08/2009 | EP1191224B1 High-pressure dome type compressor |
| 04/08/2009 | CN101403383A Screw compressor for refrigeration device |
| 04/08/2009 | CN100476212C Variable capacity rotary compressor |
| 04/07/2009 | US7513753 Variable capacity scroll compressor |
| 04/02/2009 | US20090087321 Two-stage compression rotary compressor |
| 04/01/2009 | EP2042738A2 Scroll type fluid machine and air suspension apparatus using the same |
| 04/01/2009 | EP2041436A1 Method for controlling a compressed air unit and a controller and compressed air unit for applying such a method |
| 04/01/2009 | EP2041435A1 Method for controlling a compressed air installation and controller and compressed air installation for employing such a method |
| 04/01/2009 | CN201215088Y Screw type air compressor |
| 04/01/2009 | CN201215087Y Threaded rod compressor high-efficiency operation system |
| 04/01/2009 | CN201215078Y Intelligent pressure display controlling and gas supply pressure automatic regulating device for air compressor |
| 04/01/2009 | CN101398002A Screw compressor electronic control loading device |
| 04/01/2009 | CN101397998A Slide holding device of rotary compressor and control method thereof |
| 04/01/2009 | CN101397991A Scroll type fluid machine and air suspension apparatus using the same |
| 04/01/2009 | CN100473836C Oil supply structure of scroll compressor |
| 04/01/2009 | CN100473831C Pressure startup device for air compressor |
| 03/31/2009 | US7510382 Apparatus for preventing overheating of scroll compressor |
| 03/26/2009 | US20090081053 Two-stage rotary compressor |
| 03/25/2009 | EP2038555A1 Vane cell pump |
| 03/25/2009 | CN100472071C Refrigeration compressor |
| 03/19/2009 | US20090074593 Apparatus For Preventing Vacuum Of Scroll Compressor |
| 03/18/2009 | CN201209568Y Energy-conserving high-efficiency operation control system for header pumps |
| 03/18/2009 | CN201209554Y Flame-proof type oil gas recovering vacuum pump |
| 03/18/2009 | CN101389867A Freezing device |
| 03/18/2009 | CN100470057C Step-type capacity varying apparatus of scroll compressor |
| 03/11/2009 | CN101382132A Control method for frequency conversion compressor unit for natural gas substation for automobile |
| 03/11/2009 | CN100469229C Radiator with rotation-speed indication function |
| 03/11/2009 | CN100467868C Sealed type electric compressor |
| 03/04/2009 | EP2031249A2 Capacity control device for screw compressor |
| 03/04/2009 | EP2029860A1 Slide valve actuation for overpressure safety |
| 03/04/2009 | CN101379297A Improved compressor device |
| 03/04/2009 | CN101377198A Capacity control device for screw compressor |
| 03/04/2009 | CN100465451C An overheating prevention apparatus of vortex compressors |
| 02/26/2009 | US20090053088 Reduced Rotor Assembly Diameter Vane Pump |
| 02/25/2009 | EP2027392A1 Device for regulating the operating pressure of an oil-injected compressor installation |
| 02/25/2009 | CN201198827Y Electricity-saving device of air compressor |
| 02/25/2009 | CN101375063A Vacuum pump unit |
| 02/25/2009 | CN101375062A Screw compressor |
| 02/19/2009 | WO2008137244A3 Portable air compressor/generator control method and system |
| 02/19/2009 | US20090047163 Roots Pump and Fuel Cell System |
| 02/18/2009 | EP2025940A2 Vane compressor |
| 02/18/2009 | EP2025939A2 Stepped scroll compressor with staged capacity modulation |
| 02/18/2009 | CN201196142Y Fault detection and indication circuit of air-conditioner compressor |
| 02/18/2009 | CN101368569A Independent exhaustion component used for Carroll compressor |
| 02/17/2009 | US7491045 Scroll compressor having a position adjustment device urging the stationary scroll towards the movable scroll by moving a seal formed between a support and the stationary scroll |
| 02/17/2009 | US7491034 Compressor protection and diagnostic system |
| 02/12/2009 | US20090041589 Oil-Injected Compressor with a Temperature Switch |
| 02/12/2009 | DE102005000897B4 Spiralverdichter mit variabler Leistung The scroll type compressor with variable capacity |
| 02/11/2009 | CN101363438A Vane compressor |
| 02/11/2009 | CN100460683C Capacity modulated scroll machine |
| 02/11/2009 | CN100460682C Scroll compressor with vapor injection |
| 02/04/2009 | EP2020508A1 Overpressure safety device for a vacuum pump |
| 02/04/2009 | CN201190667Y Inner pressure discharging device for oil content barrel |
| 02/04/2009 | CN101360886A Rotary motor with intermittent movements of the rotors |
| 02/04/2009 | CN101358594A Digital-controlled rotary compressor |
| 02/04/2009 | CN101358592A Stepped scroll compressor with staged capacity modulation |
| 02/04/2009 | CN100458166C Capacity-changing unit of orbiting vane compressor |
| 02/04/2009 | CN100458164C Screw compressor |
| 02/03/2009 | US7484376 Compressor diagnostic and protection system and method |
| 01/28/2009 | CN101354036A Scroll type booster |
| 01/28/2009 | CN100455807C 螺旋压缩机 Screw compressor |
| 01/22/2009 | WO2009011361A1 Electromagnetic three-way valve, rotary compressor, and refrigeration cycle device |
| 01/22/2009 | WO2009011223A1 Compressor and freezer |
| 01/21/2009 | CN101349272A Blow-off valve |
| 01/21/2009 | CN101349270A Multicylinder rotary compressor and compressing system and refrigerating unit provided with same |
| 01/21/2009 | CN101349269A Method for operating variable-volume type rolling rotor compressor and uses thereof |
| 01/21/2009 | CN100453815C Double stage screw rod compressor and double stage compressing refrigerator using same |
| 01/21/2009 | CN100453814C Capacity modulated scroll machine |
| 01/15/2009 | US20090016898 Compressor Device |
| 01/14/2009 | CN101344091A Coolant injection device and control method of rotary compressor |
| 01/14/2009 | CN100451497C Digital scroll condensing unit controller |
| 01/14/2009 | CN100451340C Rotary-type enclosed compressor and refrigeration cycle apparatus |
| 01/13/2009 | US7476089 Scroll compressor having overheat preventing unit |
| 01/08/2009 | WO2009005574A1 Capacity modulated compressor |
| 01/07/2009 | EP2012017A2 Capacity modulated compressor |
| 01/07/2009 | CN101341336A Apparatus for detecting a flammable atmosphere within a compressor, in particular avacum pump |
| 01/07/2009 | CN101338753A Compressor exhaust temperature control device and its control method and applications |
| 12/31/2008 | WO2009000162A1 A refrigerant compressor |
| 12/31/2008 | CN201173191Y Electric compressor protector |
| 12/31/2008 | CN201173190Y Screw type air compressor air admittance system controller |
| 12/31/2008 | CN201173189Y Compressor liquid-spraying control device |
| 12/31/2008 | CN201173178Y Sea water pump steady flow regulating device |
| 12/31/2008 | CN101334032A Refrigerating compressor double key groove displacement-regulating sliding piece |
| 12/31/2008 | CN101334031A Displacement regulating oil-hydraulic cylinder of compressor displacement regulating structure |
| 12/31/2008 | CN101334030A Compressor displacement regulating structure |
| 12/31/2008 | CN101334029A Semi-closed screw type refrigerating compressor energy regulating mechanism |
| 12/31/2008 | CN100447420C Scroll compressor |
| 12/25/2008 | US20080317610 Capacity Variable Type Rotary Compressor and Driving Method Thereof |
| 12/25/2008 | US20080314053 Capacity Variable Type Rotary Compressor and Driving Method Thereof and Driving Method for Air Conditioner Having the Same |
| 12/24/2008 | WO2008112568A3 Compressor with multiple inlets |
| 12/24/2008 | EP2005002A1 Screw compressor comprising a relief valve |
| 12/24/2008 | DE202008013702U1 Schraubenkompressor Screw compressor |