| 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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| 02/16/2011 | CN101975167A Compressor control system |
| 02/16/2011 | CN101466952B Device for regulating the operating pressure of an oil-injected compressor installation |
| 02/09/2011 | CN101105175B Compressed air manufacturing facility |
| 02/08/2011 | CA2479172C Suction oil injection for rotary compressor |
| 02/03/2011 | WO2011013856A1 Compression device |
| 02/02/2011 | CN201730827U Plastic gear pump device |
| 02/01/2011 | US7878006 Compressor diagnostic and protection system and method |
| 01/26/2011 | CN201723445U Compressor capable of single-stage and double-stage switching |
| 01/26/2011 | CN1993555B Capacity variable device for rotary compressor and driving method of air conditioner having the same |
| 01/19/2011 | CN201714668U Electromagnetic valve capable of eliminating friction between coil and valve rod |
| 01/19/2011 | CN101440812B Lubrication apparatus of rotary compressor and control method thereof |
| 01/18/2011 | US7871252 Rotary compressor having two compression capacities |
| 01/13/2011 | WO2010118140A3 Compressor having capacity modulation assembly |
| 01/12/2011 | CN101248278B Closed compressor and refrigerating cycle apparatus |
| 01/06/2011 | WO2010111685A3 Compressor with a bypass port |
| 01/06/2011 | WO2010025799A3 Mono-vane cell vacuum pump having a bypass channel |
| 01/06/2011 | WO2009147241A3 Apparatus for indirect conversion of ocean wave energy into electric energy |
| 01/05/2011 | CN201696297U Oil cut-off and air exhaust combination valve |
| 01/05/2011 | CN201696295U Vapor and liquid state medium double-purpose high-efficiency oil-free scroll compressor |
| 12/29/2010 | WO2010149738A1 Method for predicting a rotation fault in the rotor of a vacuum pump, and associated pumping device |
| 12/29/2010 | EP2267313A1 Cleaning method of a rotary piston vacuum pump |
| 12/29/2010 | CN201687709U Energy-saving inverse proportion valve |
| 12/29/2010 | CN101929461A Remote control and online fault diagnosis screw air compressor |
| 12/29/2010 | CN101315077B Operation method of oil-cooled type screw compressor |
| 12/28/2010 | USRE42006 Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor |
| 12/23/2010 | WO2010146793A1 Screw compressor |
| 12/23/2010 | US20100322806 Arrangement including a gear pump |
| 12/23/2010 | US20100322805 Method of controlling a gear pump as well as an application of the method |
| 12/22/2010 | CN1821578B Compressor diagnostic system |
| 12/21/2010 | US7854602 Rotary compressor for changing compression capacity |
| 12/16/2010 | US20100316519 Friction drive pump for transfer cases, etc. |
| 12/08/2010 | EP1004773B1 Multi-stage capacity control scroll compressor |
| 12/08/2010 | CN201666255U Pressure maintaining valve used for oily semi-hermetic compressor |
| 12/08/2010 | CN101907094A Screw machine |
| 12/08/2010 | CN101382132B Control method for frequency conversion compressor unit for natural gas substation for automobile |
| 12/08/2010 | CN101375062B Screw compressor |
| 12/07/2010 | US7845915 Rotary pump |
| 11/30/2010 | US7841838 Rotary closed type compressor and refrigerating cycle apparatus |
| 11/25/2010 | WO2010135290A2 Diagnostic system |
| 11/25/2010 | CA2760487A1 Diagnostic system |
| 11/24/2010 | CN201650737U Control valve of vortex type variable displacement compressor |
| 11/24/2010 | CN201650736U Desulfurization tower air supply roots blower automatic control device |
| 11/24/2010 | CN201650732U Screw air compressor |
| 11/24/2010 | CN101896725A Screw compressor |
| 11/23/2010 | USRE41955 Capacity modulation for plural compressors |
| 11/18/2010 | WO2010085593A3 Scroll compressors with different volume indexes and systems and methods for same |
| 11/17/2010 | CN1877132B Vacuum air-discharging system |
| 11/17/2010 | CN101619721B Integral electric scroll compressor assembly for vehicle air conditioners |
| 11/17/2010 | CN101457754B Hermetically sealed compressor |
| 11/11/2010 | WO2010071379A4 Method and apparatus for controlling screw compressor |
| 11/11/2010 | WO2010016685A3 Rotary compressor |
| 11/11/2010 | WO2010016684A3 Rotary compressor |
| 11/11/2010 | US20100284846 Scroll Type Fluid Machinery |
| 11/10/2010 | EP2249041A2 Sliding vane vacuum pump with an oil relief valve |
| 11/03/2010 | CN201621073U Outlet insulation mechanism of natural gas compressor |
| 10/28/2010 | WO2010122812A1 Refrigeration cycle device |
| 10/26/2010 | US7819646 Rotary piston vacuum pump with washing installation |
| 10/21/2010 | WO2010119121A2 Roughing pump method for a positive displacement pump |
| 10/21/2010 | US20100266434 Flow-controllable cell pump with pivotable control slide valve |
| 10/20/2010 | EP2241758A2 Multistage rotary compressor and refrigeration circuit system |
| 10/20/2010 | CN201610843U 一种改良的进气控制阀 An improved intake control valve |
| 10/20/2010 | CN101865132A Scroll compressor |
| 10/20/2010 | CN101865123A Compressor controller and compressor diagnostic and protection method |
| 10/14/2010 | WO2010118140A2 Compressor having capacity modulation assembly |
| 10/14/2010 | DE102009016790A1 Oil-flooded high pressure screw compressor unit, has bypass channel connected with inlet port at housing, and inlet port arranged in relation to outlet so that port is connected with working chamber that is formed by tooth spaces of rotors |
| 10/13/2010 | CN201606249U 一种空压机用自动停机装置 One kind of air compressor with an automatic shutdown device |
| 10/13/2010 | CN101010515B System and method to reduce acoustic noise in screw compressors |
| 10/07/2010 | US20100254841 Compressor having capacity modulation assembly |
| 10/06/2010 | CN201599196U 螺杆空压机的节电系统 Screw air compressor energy-saving system |
| 10/06/2010 | CN101852209A Energy-saving inverse proportion valve |
| 10/06/2010 | CN101326369B Roots pump and fuel cell system |
| 09/30/2010 | WO2010108236A1 A compressor |
| 09/29/2010 | EP2233743A1 Screw compressor |
| 09/29/2010 | CN1922388B Method and means for controlling a flow through an expander |
| 09/23/2010 | WO2010106505A2 Rotary vacuum pump with a device for decoupling the driving motor |
| 09/22/2010 | CN1904370B Multisection rotating type compressor |
| 09/22/2010 | CN101839239A Digital rotor type compressor |
| 09/22/2010 | CN101191486B Rotary compressor, control method thereof, and air conditioner using the same |
| 09/15/2010 | CN201582118U Control valve capable of preventing blower from reversely rotating |
| 09/15/2010 | CN101832268A Device for adjusting and controlling sealing height of sliding block of air compressing machine |
| 09/09/2010 | DE112006003112B4 Pumpe vom Roots-Typ und Brennstoffzellensystem Roots type pump and fuel cell system |
| 09/09/2010 | DE102008025327B4 Kältemittelverdichter Refrigerant compressor |
| 09/08/2010 | CN201574933U Starting unloading valve for Root's blower |
| 09/08/2010 | CN101826836A Electric signal-based household appliance single-rotor compressor variable frequency controller and implementation method thereof |
| 09/02/2010 | DE102006000512B4 Wälzkolbenmaschine Wälzkolbenmaschine |
| 09/01/2010 | CN1940301B Oil returning tube toward protector of electric motor of scroll compressor |
| 09/01/2010 | CN101821509A Compressor protection system and method |
| 09/01/2010 | CN101821508A Variable speed compressor protection system and method |
| 09/01/2010 | CN101821507A System and method for monitoring overheat of compressor |
| 09/01/2010 | CN101225819B Scroll type compressor |
| 08/26/2010 | WO2010071379A3 Method and apparatus for controlling screw compressor |
| 08/25/2010 | CN201560944U Vacuum pump |
| 08/25/2010 | CN1880888B Refrigerating circulation device |
| 08/25/2010 | CN101815872A Refrigeration compressor with variable speed spirals |
| 08/25/2010 | CN101813087A Vortex fluid machinery |
| 08/25/2010 | CN101086254B Compressor protection method of air conditioner and the device |
| 08/19/2010 | US20100209259 Evacuation apparatus |
| 08/18/2010 | CN201554654U Structure for reducing compressor load and improving oil circulation rate |
| 08/18/2010 | CN201554647U Emergency stop device and air compressor |
| 08/18/2010 | CN1521582B Variable speed control of multiple motors |