| 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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| 06/20/2013 | WO2013087822A1 Multi-stage vacuum pump device |
| 06/20/2013 | WO2013087708A2 Liquid ring vacuum pump with cavitation regulation |
| 06/20/2013 | US20130156607 Compressor protection and diagnostic system |
| 06/20/2013 | DE102012024236A1 Scroll-Kälteverdichter mit variabler Geschwindigkeit Scroll refrigeration compressor with variable speed |
| 06/20/2013 | DE102011121365A1 Scrollverdichter mit axial verschiebbarer Scrollspirale Scroll compressor with axially movable scroll spiral |
| 06/19/2013 | CN203009301U Stepless volume-adjusting control device of screw-type refrigerant compressor |
| 06/19/2013 | CN103161728A Variable-speed scroll refrigeration compressor |
| 06/19/2013 | CN101600884B 螺旋式压缩机容量控制 A screw compressor capacity control |
| 06/13/2013 | WO2013084100A1 System, pump and method of vacuum generation for applications to motor vehicles |
| 06/13/2013 | US20130149174 Control circuit for a variable vane oil pump |
| 06/12/2013 | CN202991496U Motor compressor controller for automobile air conditioner |
| 06/06/2013 | WO2012012423A3 Variable capacity screw compressor and method |
| 05/30/2013 | WO2013077388A1 Gas compressor |
| 05/30/2013 | WO2012076099A3 Gear shaft assembly |
| 05/29/2013 | CN202954973U 罗茨风机控制器 Roots blower controller |
| 05/23/2013 | WO2012073165A3 Vacuum pump for motor vehicles |
| 05/22/2013 | CN202946392U Refrigerating screw compressor energy conditioning device internally provided with safety bypass valve |
| 05/22/2013 | CN202946388U Performance tuning position indicating device of refrigeration screw compressor |
| 05/22/2013 | CN202946384U Secondary compression screw rod air compressor |
| 05/22/2013 | CN202946383U Low-pressure screw type air compressor |
| 05/22/2013 | CN101163887B System and method for controlling a variable speed compressor during stopping |
| 05/16/2013 | US20130121843 Compressor digital control failure shutdown algorithm |
| 05/15/2013 | EP2592276A2 Compressor digital control failure shutdown algorithm |
| 05/15/2013 | CN103109091A 螺杆式压缩机 Screw compressors |
| 05/15/2013 | CN103104495A Refrigeration screw compressor adjustable device with built-in safety bypass valve |
| 05/15/2013 | CN103104494A Indication device of adjustable position of refrigeration screw compressor |
| 05/15/2013 | CN103104493A Oil-free dry vacuum pump double-driving main shaft control system |
| 05/08/2013 | CN202926633U Vacuum screw machine vacuum regulating valve |
| 05/08/2013 | CN202926632U Pressure control valves and vortex compressor |
| 05/08/2013 | CN103097734A Volume ratio control system and method |
| 05/08/2013 | CN103089648A Rotary machine and control method thereof |
| 05/08/2013 | CN102003392B Dual-sliding vane rotary compressor, control method and application thereof |
| 05/02/2013 | US20130108496 Scroll compressor |
| 05/02/2013 | US20130108494 Metering gear pump with integral flow indicator |
| 04/24/2013 | EP2584200A2 Gas injection valve for a compressor, compressor with such a gas injection valve and method for operating a compressor with such a gas injection valve |
| 04/24/2013 | CN202900666U Graphic display screen of twin-screw air compressor |
| 04/24/2013 | CN202900654U Screw compressor |
| 04/24/2013 | CN103069170A Positive displacement compressor |
| 04/17/2013 | EP2581605A2 Scroll compressor with bypass hole |
| 04/17/2013 | CN202883381U Screw rod type water cooling air compressor energy-saving structure |
| 04/17/2013 | CN103047144A Control method for dry vacuum pump capable of automatically adjusting pressure |
| 04/11/2013 | DE112011101871T5 Scroll-Kälteverdichter Scroll refrigeration compressor |
| 04/10/2013 | CN202867223U Pressure maintenance mechanism |
| 04/10/2013 | CN202867214U Rotary compressor and coolant circulating system with same |
| 04/10/2013 | CN103038510A Device and method for controlling compressor, and refrigerator including same |
| 04/10/2013 | CN101975167B Compressor control system |
| 04/10/2013 | CN101482113B Scroll compressor with device to limit orbit radius |
| 04/04/2013 | WO2013048266A1 System and method for monitoring polytropic efficiency of a charge gas compressor |
| 04/04/2013 | WO2013045127A2 Vane pump |
| 04/03/2013 | EP2574792A1 Vane pump |
| 04/03/2013 | CN202851359U Control device for screw compressor |
| 04/03/2013 | CN103016343A Compressor including biasing passage located relative to bypass porting |
| 04/03/2013 | CN101699071B Device for monitoring and protecting speed of screw pump |
| 03/28/2013 | DE112011101873T5 Klappenanordnung für Scroll-Kälteverdichter Flap arrangement for scroll refrigeration compressor |
| 03/27/2013 | EP2573400A2 Method for controlling a compressor installation |
| 03/27/2013 | EP2573399A2 Motor-driven compressor |
| 03/27/2013 | CN202833173U Sliding valve, sliding valve adjusting mechanism and screw compressor |
| 03/27/2013 | CN202833171U Novel air compressor |
| 03/27/2013 | CN1892034B Two stage type screw compressor |
| 03/27/2013 | CN103003116A Control valve for an oil-injected screw-type compressor |
| 03/27/2013 | CN101000054B Rotating type compressor sliding vane controlling apparatus and controlling method and application thereof |
| 03/20/2013 | CN102979933A Check device |
| 03/20/2013 | CN101614201B Control valve for variable volume type compressor |
| 03/19/2013 | US8398376 Dry pumps |
| 03/13/2013 | CN202789544U Oil level control system and helical-lobe compressor set |
| 03/13/2013 | CN202789527U Driving device of screw air compressor and screw air compressor |
| 03/13/2013 | CN102966546A Roots blower controller |
| 03/07/2013 | WO2013033502A1 System and method for controlling a variable speed drive of a compressor motor |
| 03/06/2013 | EP2565456A1 Screw compressor |
| 02/21/2013 | WO2011066817A3 Vacuum pump |
| 02/20/2013 | EP2558339A1 Control valve for an oil-injected screw-type compressor |
| 02/20/2013 | CN202746208U Temperature control equipment for compressor, compressor component and refrigeration system |
| 02/20/2013 | CN202746207U Screw machine for mining |
| 02/20/2013 | CN101424265B 涡旋式压缩机 Scroll compressor |
| 02/14/2013 | CA2843336A1 Scroll pump |
| 02/13/2013 | CN102933850A Valve arrangement for a scroll refrigeration compressor |
| 02/13/2013 | CN102927011A Compression apparatus |
| 02/13/2013 | CN102927010A Screw compressor and control device and method of screw compressor |
| 02/07/2013 | US20130034460 Variable Displacement Vane Pump |
| 02/06/2013 | EP2553267A2 Vacuum pumping system |
| 01/31/2013 | DE102009050801B4 Sicherheitseinrichtung zum Schutz drucklos arbeitender Einrichtungen Safety device to protect unpressurized operating facilities |
| 01/30/2013 | EP2551526A2 Two stage rotary compressor |
| 01/30/2013 | EP2550458A1 Vacuum dispensing unit with automatic detection and control of pressure increases |
| 01/30/2013 | CN202707499U Automatic operation control system of compressor |
| 01/30/2013 | CN202707491U 恒压变量智能空压机 Intelligent constant pressure variable compressor |
| 01/30/2013 | CN202707487U 压缩机 Compressor |
| 01/23/2013 | EP2549110A1 Single screw compressor |
| 01/23/2013 | CN202690450U Frequency conversion starting-based screw air compressor starting system |
| 01/23/2013 | CN202690449U Combined control system of roots blower |
| 01/23/2013 | CN202690448U Control system for low-pressure oil injection screw compressor |
| 01/23/2013 | CN202690447U Intelligent control system for air-cooled screw air compressor |
| 01/23/2013 | CN202684031U Ultralow pressure air control servo system |
| 01/17/2013 | WO2013007470A1 Screw compressor |
| 01/17/2013 | WO2012161525A3 Intelligent air compressor system |
| 01/16/2013 | CN202673688U Double slide valve inner volume ratio stepless regulating device of single-screw refrigerating compressor |
| 01/16/2013 | CN101787977B Scroll compressor with three-step capacity control |
| 01/09/2013 | CN102865229A Electric vacuum pump for motor vehicle |
| 01/08/2013 | US8348645 Balanced pressure, variable displacement, dual lobe, single ring, vane pump |
| 01/03/2013 | WO2013002183A1 Vane compressor |
| 01/02/2013 | EP2541066A1 Scroll compressor |