| Patents for F04C 25 - Adaptations for special use of pumps for elastic fluids (1,852) |
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| 11/25/2009 | CN201351605Y Lobed rotor compressor or vacuum pump |
| 11/25/2009 | CN100562665C Pawl-type dry vacuum pump rotor |
| 11/24/2009 | US7621721 Vacuum pumping device with electronic control of the motor |
| 11/18/2009 | EP2117397A2 Flexible impeller pumps for mixing individual components |
| 11/11/2009 | CN201344126Y Oil-less dry type screw vacuum pump |
| 11/11/2009 | CN201344125Y Roots vacuum pump |
| 11/11/2009 | CN100559028C Rapidly pumping out an enclosure while limiting energy consumption |
| 11/05/2009 | DE102008021971A1 Vakuumpumpe sowie Verfahren zum Reinigen von Vakuumpumpen Vacuum pump as well as method for purifying of vacuum pumps |
| 11/03/2009 | US7611340 Composite dry vacuum pump having roots and screw rotor |
| 10/29/2009 | US20090269231 Method of Pumping Gas |
| 10/28/2009 | CN101566157A Vacuum pump supporting device |
| 10/28/2009 | CN101566152A Screw vacuum pump |
| 10/21/2009 | CN201330708Y Cooling structure for front/rear covers and end cover of Roots vacuum pump |
| 10/21/2009 | CN201330705Y Mechanical seal structure of Roots vacuum pump |
| 10/21/2009 | CN201330703Y Anti-corrosion Roots vacuum pump |
| 10/21/2009 | CN101560976A Energy-saving and environment-friendly vacuum device applied to petrochemical engineering and mixed arene separating system |
| 10/15/2009 | DE10300683B4 Hybridverdichter Hybrid compressor |
| 10/15/2009 | DE102008017955A1 Fluidgedichtete oder fluidgeschmierte Vakuum-Pumpe Sealed fluid or fluid-lubricated vacuum pump |
| 10/14/2009 | CN100549425C Dual-shaft vacuum pump |
| 10/08/2009 | DE102009008630A1 Vakuumpumpenflansch Vakuumpumpenflansch |
| 09/30/2009 | CN201318288Y Compression vacuum dual-purpose machine |
| 09/30/2009 | CN101545487A Multi-stage rotor pump and manufacturing process thereof |
| 09/30/2009 | CN101545486A Multistage vacuum pump unit and an operation method thereof |
| 09/24/2009 | WO2009115854A1 Method of producing vane |
| 09/17/2009 | DE102009008906A1 Verfahren zur Herstellung von Drehschiebern Process for the preparation of rotary valves |
| 09/16/2009 | CN101532492A Tempering method for a screw-type vacuum pump |
| 09/09/2009 | EP2098685A1 Compressor and method for compressing gaseous fuel |
| 09/09/2009 | CN201306284Y A vacuum pump device provided with an anti-reversing structure |
| 08/19/2009 | CN201292959Y Dry vacuum pump |
| 08/19/2009 | CN201292958Y Vortices type vacuum pump |
| 08/19/2009 | CN201292947Y Cold well type multi-piece differential large-sized vacuum pump |
| 08/19/2009 | CN201292944Y Large pumping speed type high vacuum dry vacuum pump |
| 08/19/2009 | CN201292943Y Vacuum pump |
| 08/19/2009 | CN101509489A Straightly-connecting explosion suppression swirl vacuum compressor without lubricant |
| 08/12/2009 | EP1609990B1 Vacuum device and vacuum pump |
| 08/12/2009 | CN201288664Y Vacuum pump |
| 08/05/2009 | CN101498303A Root's vacuum pump with plane clearance adjustment apparatus |
| 07/30/2009 | DE102008054240A1 Rotor for use in pump i.e. vacuum pump, has separate bearing body comprising additional bearing section, which is fixedly connected with rotor base body at front side of base body, at which blade receiving slot is opened |
| 07/23/2009 | DE19981942B4 Vakuumpumpe Vacuum pump |
| 07/22/2009 | CN100516533C Fluid conveying equipment |
| 07/22/2009 | CN100516532C Vacuum pump |
| 07/14/2009 | US7559752 Dual-shaft vacuum pump |
| 06/18/2009 | DE102007060147A1 Drehschiebervakuumpumpe Rotary vane vacuum pump |
| 06/18/2009 | DE102007059938A1 Vakuumpumpe und Verfahren zum Betrieb A method of operating vacuum pump and |
| 06/11/2009 | WO2002061283A3 Scroll vacuum pump with improved performance |
| 05/28/2009 | DE102007043350B3 Vakuumpumpe sowie Verfahren zur Steuerung einer Gasballastzufuhr zu einer Vakuumpumpe Vacuum pump and method of controlling a gas ballast supply to a vacuum pump |
| 05/27/2009 | CN201246305Y 皮带式真空泵 Belt-type vacuum pump |
| 05/27/2009 | CN100491735C Assembly fo dry type vacuum pump and load-interlock device |
| 05/22/2009 | WO2009063890A1 Multi-stage dry pump |
| 05/22/2009 | WO2009063820A1 Dry pump |
| 05/20/2009 | CN201241835Y Single-stage sliding valve vacuum pump of high pressure oil pump forced lubrication |
| 05/20/2009 | CN201241834Y Damping device of sliding valve vacuum pump |
| 05/20/2009 | CN201241831Y Novel water-ring type vacuum pump |
| 05/20/2009 | CN201241830Y Non-leakage mechanical seal single-stage sliding valve vacuum pump |
| 05/13/2009 | CN101429939A Compression vacuum dual-purpose machine |
| 05/13/2009 | CN100487249C Tempering method for a screw-type vacuum pump |
| 05/06/2009 | EP1327078B1 Multi-stage helical screw rotor |
| 05/06/2009 | CN201232635Y Compressor or vacuum pump |
| 04/08/2009 | CN101403384A Forced lubrication type high-speed sliding valve vacuum pump |
| 04/02/2009 | WO2009040412A1 Vacuum pump with two helical rotors |
| 04/01/2009 | EP2042739A1 Vacuum pump with two helical rotors |
| 03/26/2009 | DE202009000602U1 Verkleidung und Anordnung zum Reduzieren von Lärm von einer Pumpe Enclosures and arrangement for reducing noise from a pump |
| 03/25/2009 | CN101392751A Large pumping speed high vacuum dry vacuum pump |
| 03/25/2009 | CN101392750A Dry vacuum pump |
| 03/25/2009 | CN101392749A Vortex vacuum pump |
| 03/25/2009 | CN101392748A Horizontal type dry vacuum pump |
| 03/11/2009 | CN101383534A Motor for vacuum pump |
| 03/11/2009 | CN101382137A Multi-stage roots dry vacuum pump discharging directly into atmosphere |
| 03/10/2009 | US7500838 Vacuum pump with a pair of screw rotors |
| 03/10/2009 | US7500822 Combined vacuum pump load-lock assembly |
| 03/04/2009 | CN100465452C A vacuum pump |
| 03/04/2009 | CN100465450C A composite dry vacuum pump with roots rotors and screw rotors |
| 02/25/2009 | CN101375063A Vacuum pump unit |
| 02/19/2009 | DE102007038966A1 Mehrstufige Drehkolbenvakuumpumpe bzw. - verdichter Multi-stage rotary piston vacuum pump or - compressor |
| 02/18/2009 | CN101368566A Cylindrical compressor or vacuum pump |
| 02/11/2009 | CN100460684C Oilless roots vacuum pump with mechanical seal |
| 02/05/2009 | WO2009018239A1 Vehicle-based vacuum system apparatus and methods |
| 02/05/2009 | DE102007001316B4 Entstaubungsvorrichtung und Verfahren zur Entstaubung, insbesondere von Bandanlagen Dedusting device and method for removing dust, particularly of belt systems |
| 02/04/2009 | CN201190665Y Low vacuum and large bled air rate vacuum pump special for milking |
| 01/28/2009 | CN201187454Y Environment protection type vacuum pump |
| 01/28/2009 | CN201187452Y Vacuum pump rotary vane with slot |
| 01/28/2009 | CN201187451Y Vacuum microsystem |
| 01/28/2009 | CN101354040A Novel high pressure oil pump forced lubrication single-stage sliding valve vacuum pump |
| 01/28/2009 | CN101354039A Novel low-vibration low-energy consumption electric machine overhead type single-stage sliding valve vacuum pump |
| 01/28/2009 | CN101354038A Novel non-leakage mechanical seal single-stage sliding valve vacuum pump |
| 01/21/2009 | CN101349271A Novel water-ring type vacuum pump |
| 01/21/2009 | CN101349073A Vacuum collecting and discharging system |
| 01/21/2009 | CN101349072A Vacuum system |
| 01/15/2009 | US20090016920 Screw pump and screw gear |
| 01/14/2009 | CN201180652Y High-vacuum pump directly discharging to atmosphere |
| 01/14/2009 | CN101344085A Vane compressor or vacuum pump |
| 01/08/2009 | WO2009004360A1 Fkm or ffkm multiple layers seal |
| 01/08/2009 | CA2692086A1 Fkm or ffkm multiple layers seal |
| 01/07/2009 | CN101338752A Compressor or vacuum pump |
| 01/07/2009 | CN101338748A Motor direct drive type air pumping and application and manufacture method |
| 01/07/2009 | CN100449149C Micro machined vortex type compressor and relevant technology |
| 12/31/2008 | WO2009001677A1 Vane type vacuum pump |
| 12/31/2008 | CN101334033A Magnetic bearing and coupling device |
| 12/31/2008 | CN101334017A Compressor |
| 12/03/2008 | CN201159173Y Cam pump units for vacuum type drainage system of city toilet |