| 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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| 09/30/2009 | EP2105612A2 Scroll compressor |
| 09/30/2009 | CN100545459C Variable capacity rotary compressor |
| 09/30/2009 | CN100545458C Variable capacitance rotary compressor |
| 09/30/2009 | CN100545457C Freezing cycle device |
| 09/29/2009 | CA2495783C Speed control for compressors |
| 09/23/2009 | CN101539146A Capacity variable rotary compressor and air-conditioning circulatory system |
| 09/23/2009 | CN101539144A Scroll compressor |
| 09/23/2009 | CN100543308C Lubricating-free screw compressor |
| 09/16/2009 | CN101532497A Oil-balancing system for double constant speed compressor of commercial air duct type air-conditioner |
| 09/16/2009 | CN101532495A Compressor protector |
| 09/16/2009 | CN101532494A Control method of inverter compressor and inverter compressor |
| 09/16/2009 | CN101532492A Tempering method for a screw-type vacuum pump |
| 09/16/2009 | CN100540906C Capacity variable type rotary compressor and driving method thereof |
| 09/16/2009 | CN100540905C Rotary compressor |
| 09/16/2009 | CN100540904C System for controlling compressor of cooling system and method for controlling the same |
| 09/16/2009 | CN100540903C Variable capacity equipment in revolving compressor |
| 09/16/2009 | CN100540902C Volume regulator of scroll compressor |
| 09/15/2009 | US7588427 Variable capacity rotary compressor |
| 09/09/2009 | CN101526080A System and method for energy-saving control of compressor unit |
| 09/02/2009 | EP2096314A2 Volume regulating structure for rotary helical screw compressors |
| 09/02/2009 | CN100535447C Three-way electromagnetical valve |
| 09/01/2009 | CA2532045C Rotary compressor having a discharge valve |
| 08/26/2009 | EP2093427A2 Capacity Varying Device for a Scroll Compressor |
| 08/26/2009 | CN201297251Y Compressor using intelligent controller for controlling running state |
| 08/26/2009 | CN101517238A A rotary pump with vanes |
| 08/26/2009 | CN101514701A Capacity varying device for a scroll compressor |
| 08/26/2009 | CN101514698A Intelligent energy saving control system of air compressor |
| 08/26/2009 | CN100532846C Oil feeding propeller of scroll compressor |
| 08/26/2009 | CN100532839C Compressor capacity control valve and control method and application thereof |
| 08/20/2009 | WO2009074408A3 Vacuum pump, and method for operating a vacuum pump |
| 08/19/2009 | EP2089609A1 Integral slide valve relief valve |
| 08/19/2009 | CN201292945Y Start-up protective system for spiral slice type oil-sealed vacuum pump |
| 08/19/2009 | CN101512160A 压缩机数据模块 Compressor Data Module |
| 08/19/2009 | CN100529407C Multicylinder rotary compressor |
| 08/19/2009 | CN100529401C 机动泵 Motorized pump |
| 08/12/2009 | CN201288650Y Air-conditioner compressor system for vehicle |
| 08/05/2009 | EP2085617A2 Mode changing apparatus for a scroll compressor |
| 08/05/2009 | EP2084399A1 Compressor slide valve support |
| 08/05/2009 | CN201285504Y Circuit apparatus for controlling low voltage closing of refrigerator |
| 08/05/2009 | CN201284740Y Cyclone compressor |
| 08/05/2009 | CN201284734Y Behavior control device for vehicle air compressor |
| 08/05/2009 | CN101498302A Mode changing apparatus for a scroll compressor |
| 08/05/2009 | CN101498295A Compressor group control system based on wireless conveying technology to control terminal pressure |
| 08/05/2009 | CN100523510C Dual volume-ratio scroll machine |
| 08/05/2009 | CN100523505C Turbo machine having dual volume ratio |
| 07/22/2009 | CN201277178Y Gas circuit integrated controller for mining air compressor |
| 07/21/2009 | US7563085 Multicylinder rotary compressor and compressing system and refrigerating unit provided with same |
| 07/15/2009 | CN201273283Y High pressure protection device |
| 07/15/2009 | CN201273282Y Screw compressor with adjustable inner volume ratio |
| 07/15/2009 | CN101482118A Volume regulation structure |
| 07/15/2009 | CN100513792C Compressor driving device and freezing air conditioner device |
| 07/15/2009 | CN100513791C An adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor |
| 07/14/2009 | US7559752 Dual-shaft vacuum pump |
| 07/14/2009 | US7559750 Overheating protection apparatus of scroll compressor |
| 07/08/2009 | CN101476564A Security induction valve and security buffering two-purpose valve employing the same |
| 07/08/2009 | CN100510421C Variable capacity compressor |
| 07/08/2009 | CN100510405C Compressor diagnostic system |
| 07/07/2009 | USRE40830 Compressor capacity modulation |
| 07/01/2009 | CN201265528Y Full-pneumatic pressure control and flow regulation system of helical-lobe compressor |
| 07/01/2009 | CN101469709A Computer control method for compressor operation remote monitoring |
| 06/25/2009 | WO2009078178A1 Screw compressor |
| 06/25/2009 | DE102007060174A1 Vakuumpumpe sowie Verfahren zum Betreiben einer Vakuumpumpe Vacuum pump and method of operating a vacuum pump |
| 06/24/2009 | CN101466952A Device for regulating the operating pressure of an oil-injected compressor installation |
| 06/24/2009 | CN101463818A Cooperation structure for crankshaft and electric motor rotor of rotary compressor |
| 06/18/2009 | WO2009074408A2 Vacuum pump, and method for operating a vacuum pump |
| 06/18/2009 | DE102007059938A1 Vakuumpumpe und Verfahren zum Betrieb A method of operating vacuum pump and |
| 06/17/2009 | EP2071123A2 Turning head vacuum pump with modified shaft bearing |
| 06/17/2009 | EP2069638A1 Compressor data module |
| 06/10/2009 | EP2066905A1 A rotary pump with vanes |
| 06/04/2009 | DE19848413B4 Motor-Pumpeneinheit Motor-pump unit |
| 05/28/2009 | WO2009048566A3 System and method for monitoring overheat of a compressor |
| 05/27/2009 | EP2063127A1 Safety device for intake valves |
| 05/27/2009 | CN201246307Y Roots fan full-automatic anti-inversion device |
| 05/27/2009 | CN101440812A Lubrication apparatus of rotary compressor and control method thereof |
| 05/27/2009 | CN101440811A Lubrication apparatus of horizontal rotary compressor and control method thereof |
| 05/27/2009 | CN101440808A Oil surface control device of horizontal rotary compressor |
| 05/27/2009 | CN100492798C Compressor assembly and cooling system |
| 05/22/2009 | WO2009024698A3 Refrigeration compressor with variable speed spirals |
| 05/21/2009 | US20090129937 Downhole pump controller |
| 05/20/2009 | CN201241833Y Air conditioner compressor protection system and air conditioner having the same |
| 05/20/2009 | CN201241832Y Compressor air inlet control valve |
| 05/13/2009 | EP2058520A1 Backup vacuum-production installation and corresponding vacuum-production system. |
| 05/13/2009 | EP1692440A4 Compressor with unloader valve between economizer line and evaporator inlet |
| 05/13/2009 | CN201236801Y Multifunctional helical-lobe compressor controller |
| 05/13/2009 | CN100487249C Tempering method for a screw-type vacuum pump |
| 05/07/2009 | DE112007000514T5 Flügelpumpe mit reduziertem Rotoranordnungsdurchmesser Vane pump rotor assembly with reduced diameter |
| 05/06/2009 | EP2055957A1 Scroll Compressor |
| 05/06/2009 | EP2055956A1 Multistage compressor |
| 05/06/2009 | EP2054626A1 Method for reacting self-igniting dusts in a vacuum pump device |
| 05/06/2009 | CN201232637Y Electricity-saving control equipment for air compressor |
| 05/06/2009 | CN201232636Y Intelligent electricity-saving control equipment for air compressor |
| 05/06/2009 | CN201232626Y Control device for air compressor |
| 05/06/2009 | CN101424267A Rotary compressor |
| 05/06/2009 | CN101424265A Scroll compressor |
| 04/29/2009 | EP1723310B1 Method and means for controlling a flow through an expander |
| 04/29/2009 | CN201228625Y Energy-conserving control device of air compressing engine for vehicle |
| 04/29/2009 | CN101418800A Control system for intelligent frequency conversion screw air compressor |
| 04/23/2009 | US20090104060 Compressor |
| 04/22/2009 | CN201225288Y Explosion-proof type oil and gas recovery vacuum pump |
| 04/22/2009 | CN100480514C Scroll compressor |