| Patents for F04C 27 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids (2,516) |
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| 10/04/2012 | CA2830142A1 Scroll compressor |
| 10/03/2012 | CN102705238A Shaft-seal-free series connection-type multi-stage screw compressor |
| 09/27/2012 | WO2012128267A1 3-stroke/6-stroke rocket jet engine |
| 09/26/2012 | CN102695880A formed seal ring for a liquid gas separating element |
| 09/20/2012 | US20120233805 Vacuum Motor Scroll Assembly and Vacuums Including Such an Assembly |
| 09/19/2012 | EP2500570A2 Scroll compressor for a Rankine cycle |
| 09/19/2012 | EP2499374A2 Corrosion resistant shaft sealing for a vacuum pump |
| 09/19/2012 | CN102678561A Water injection type screw fluid machine |
| 09/19/2012 | CN102678558A Electric compressor |
| 09/18/2012 | US8267677 Gasket part for a pump |
| 09/13/2012 | DE102011005464A1 Vorrichtung zur Erzeugung eines Unterdrucks Device for generating a negative pressure |
| 09/12/2012 | CN202431525U Vortex disc of vortex compressor |
| 09/12/2012 | CN202431523U Backpressure cavity sealing device of scroll compressor and scroll compressor using the same |
| 09/12/2012 | CN102667164A Optimized discharge port for scroll compressor with tip seals |
| 09/12/2012 | CN102667061A Internal combustion engine and supercharger |
| 09/12/2012 | CN102661280A Shaft end sealing system for driving shaft of Roots blower |
| 09/05/2012 | CN202417943U Sliding vane rotary vacuum pump of high vacuum degree |
| 09/05/2012 | CN102656368A Corrosion resistant shaft sealing for a vacuum pump |
| 09/05/2012 | CN102654127A Shaft sealing structure for vacuum pump |
| 09/04/2012 | US8257057 Variable displacement vane pump |
| 08/23/2012 | WO2012111863A1 Apparatus for fixing a dust seal of a scroll compressor |
| 08/22/2012 | CN202391738U Roots vacuum pump |
| 08/22/2012 | CN102644601A Novel vertical oil-less pump |
| 08/21/2012 | CA2522728C Screw type liquid ring pump |
| 08/08/2012 | CN202370847U Double-end-face mechanical sealing device of Roots fan |
| 07/25/2012 | CN202348674U Axial thrust sealing device for scroll compressor |
| 07/25/2012 | CN101784754B Spiral-type extruder |
| 07/24/2012 | US8225968 Seal system for gear pumps |
| 07/19/2012 | WO2012096057A1 Dual-shaft rotor pump |
| 07/19/2012 | WO2012096056A1 Scroll fluid machine |
| 07/18/2012 | EP2475891A2 Optimized discharge port for scroll compressor with tip seals |
| 07/18/2012 | CN102588287A Mechanical sealing parts of Roots blower and lubricating method thereof |
| 07/18/2012 | CN102588286A Vortex compressor sealing structure and vortex compressor containing same |
| 07/18/2012 | CN102585436A Method for preparing sealing strip of scroll compressor |
| 07/18/2012 | CN101265907B Cyclone compressor possessing abridged floating sealed device |
| 07/12/2012 | US20120174617 Refrigerant compressor and refrigeration cycle apparatus |
| 07/11/2012 | EP2474741A2 Scroll compressor having a back pressure adjustment device |
| 07/11/2012 | CN202326235U 多段环槽轴向密封式涡旋压缩机 Multi-stage axial seal ring groove type scroll compressor |
| 07/11/2012 | CN102562596A Water injection type screw fluid machine |
| 07/05/2012 | US20120171067 Hermetic compressor and manufacturing method thereof |
| 07/04/2012 | CN102536821A Semi-closed screw refrigerating compressor for ammonia |
| 06/28/2012 | WO2012086245A1 Hermetically sealed rotary compressor |
| 06/28/2012 | US20120164015 Water injection type screw fluid machine |
| 06/27/2012 | CN101985939B Dry vacuum pump with shaft end dynamic seal structure |
| 06/20/2012 | EP2464873A2 Scroll pump |
| 06/20/2012 | EP2464869A2 Vacuum pump |
| 06/20/2012 | CN101456532B Micro scroll vane and method for producing micro scroll vane substrates |
| 06/13/2012 | CN202273859U 一种组合密封罗茨鼓风机 A combination seal blower |
| 06/13/2012 | CN202273856U 一种干气密封罗茨鼓风机 A dry gas seal blower |
| 06/07/2012 | US20120141314 Vacuum pump |
| 06/05/2012 | US8192186 Rotor having a cooling channel and compressor element provided with such rotor |
| 06/05/2012 | US8192185 Expander-compressor unit |
| 05/31/2012 | WO2011128502A3 Liquid ring pump and method for operating a liquid ring pump |
| 05/30/2012 | CN202250867U Shaft seal device of high-pressure screw compressor |
| 05/30/2012 | CN102483063A 干式真空泵 Dry Vacuum Pumps |
| 05/23/2012 | CN102472283A 涡旋泵 Scroll pump |
| 05/22/2012 | US8182251 Expander-compressor unit |
| 05/09/2012 | CN102444584A Motor-driven compressor |
| 05/09/2012 | CN101311543B Rotor shaft sealing method and structure of oil-free rotary compressor |
| 04/26/2012 | US20120100027 Internal-Rotation Type Gear Pump and Method of Assembling and Repairing an Internal-Rotation Type Gear Pump |
| 04/26/2012 | DE10019637B4 Schraubenvakuumpumpe Screw vacuum pump |
| 04/18/2012 | CN202194829U 新型罗茨风机密封涨圈 The new blower sealing up ring |
| 04/18/2012 | CN102422061A Adjustable mechanical seal |
| 04/18/2012 | CN102422024A Compressor having capacity modulation assembly |
| 04/11/2012 | CN102410224A 真空泵 Vacuum pump |
| 03/27/2012 | CA2672332C A rotary device |
| 03/22/2012 | DE102010045881A1 Vakuumpumpe Vacuum pump |
| 03/22/2012 | DE102010045880A1 Vakuumpumpe Vacuum pump |
| 03/21/2012 | EP2431613A2 Shaft seal for a vacuum pump |
| 03/21/2012 | CN101765700B Displacement machine according to the spiral principle having two sides of support structures |
| 03/07/2012 | CN102367796A Horizontal scroll compressor main shaft rear-end sealing structure |
| 03/01/2012 | DE102010055798A1 Vakuumpumpe Vacuum pump |
| 02/22/2012 | CN202149031U 一种涡旋压缩机阶梯型轴向密封条 A scroll compressor ladder-type axial seal |
| 02/15/2012 | EP2417356A2 Compressor having capacity modulation assembly |
| 02/08/2012 | CN102345602A Fluid machine |
| 01/19/2012 | WO2011058339A3 Corrosion resistant shaft sealing for a vacuum pump |
| 01/18/2012 | EP2407636A2 Vane compressor |
| 01/12/2012 | US20120009077 Scroll Fluid Machine |
| 01/11/2012 | EP1476661B1 Vacuum pump |
| 01/11/2012 | CN102313018A U-shaped sealing member |
| 01/10/2012 | US8092200 Gas compressor with a pressure bypass valve being formed in a compressed gas passage or an oil separation space |
| 01/10/2012 | CA2641765C Tipseal for a scroll compressor |
| 01/04/2012 | EP2402612A2 Sealing arrangement for the wrap tips of a scroll compressor |
| 01/04/2012 | CN102308094A Scroll compressor with materials to allow run-in |
| 12/28/2011 | CN102301094A 带有接纳排放压力流体的背压腔的涡旋式压缩机 Scroll compressor with a discharge pressure of the fluid back pressure receiving chamber |
| 12/21/2011 | CN202082105U Shaft sealing structure of Roots pump |
| 12/21/2011 | CN102287375A 一种爪型立式无油真空泵 One kind of claw-type vertical oil-free vacuum pump |
| 12/15/2011 | WO2011018293A3 Vacuum pump |
| 12/14/2011 | EP2394059A1 Scroll compressor with materials to allow run-in |
| 12/14/2011 | EP2394024A1 Scroll compressor with back pressure pocket receiving discharge pressure fluid |
| 12/07/2011 | EP2392827A1 Scroll compressor |
| 12/07/2011 | EP1158166B1 Scroll type compressor |
| 12/07/2011 | CN202065185U 一种新型结构的无油螺杆压缩机 A new structure of oil-free screw compressors |
| 12/07/2011 | CN202065181U Melt pump |
| 12/07/2011 | CN202065180U Sealing structure of rolling rotor compressor |
| 11/24/2011 | US20110286871 Scroll compressor |
| 11/23/2011 | CN202047983U Structure for sealing rear end of main shaft of horizontal vortex compressor |
| 11/17/2011 | WO2011088290A3 Formed seal ring for a liquid gas separating element |
| 11/16/2011 | EP2195511B1 Spiral-type positive-displacement machine |
| 11/16/2011 | CN102242714A Compound seal device of claw type dry vacuum pump |