| Patents for F04C 27 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids (2,516) |
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| 07/24/2013 | CN203081763U Sealing impeller for Roots blower |
| 07/24/2013 | CN203081762U Sealing impeller of fan |
| 07/18/2013 | WO2012127198A3 Vacuum pump with longitudial and annular seals |
| 07/17/2013 | CN203067289U Roots blower seal structure |
| 07/16/2013 | US8485803 Scroll compressor comprising oil separating driving shaft |
| 07/16/2013 | CA2796484A1 Oval chamber circular raceway pump |
| 07/11/2013 | WO2012116779A3 Rotary slide valve |
| 07/10/2013 | EP2613053A2 Rotary compressor with dual eccentric portion |
| 07/10/2013 | CN203051114U Scroll compressor |
| 07/10/2013 | CN103195712A Integral type sliding-vane rotary vacuum pump |
| 07/03/2013 | EP2610876A2 Methods and apparatuses for pump sealing during leakage events |
| 07/03/2013 | CN101784824B Dry-type vacuum pump comprising a device for sealing against lubricating fluids, and centrifuging element equipping such a device |
| 07/02/2013 | US8475140 Dual volume-ratio scroll machine |
| 06/26/2013 | CN203023057U Roots steam compressor rotor |
| 06/20/2013 | DE102012024237A1 Öleinspritzvorrichtung für einen Scroll-Kälteverdichter mit variabler Geschwindigkeit Oil injection device for a scroll-type refrigeration compressor with variable speed |
| 06/19/2013 | CN203009300U Frame sealing device of rotor pump |
| 06/12/2013 | CN202991490U Novel roots blower |
| 06/12/2013 | CN202991488U Axial flexible sealed vortex compressor |
| 06/12/2013 | CN103147989A Double-end-face mechanical sealing device of Roots fan |
| 06/12/2013 | CN101910638B A displacement pump with a barrier against the fluid leakage |
| 06/11/2013 | US8459973 Vane pump having an oil supply passage communicating with a gas passage in the stopping state |
| 06/05/2013 | CN202971196U Sealing fin for single-stage high-speed blower |
| 05/29/2013 | CN202954972U Axial seal mechanism of scroll compressor |
| 05/29/2013 | CN103122858A Composite sealing device of Roots blower end cover |
| 05/29/2013 | CN103122855A Scroll refrigerating compressor |
| 05/29/2013 | CN101815873B A multi stage, clam shell vacuum pump |
| 05/29/2013 | CN101535633B Long life telescoping gear pumps and motors |
| 05/28/2013 | US8449277 Vane pump having a passage area ratio between an oil supply passage area and a gas passage area |
| 05/22/2013 | CN202946387U Sealing structure of air-cooling type roots vacuum pump |
| 05/15/2013 | CN103104492A Sealing structure of roots blower |
| 05/15/2013 | CN103104489A Roots vacuum pump |
| 05/10/2013 | WO2013067099A1 High pressure seal vent |
| 05/08/2013 | CN202926629U Roots pump |
| 05/08/2013 | CN103089649A Rotor of Roots type vapor compressor |
| 05/08/2013 | CN103089637A Improved Roots vacuum pump device |
| 05/08/2013 | CN103089629A Compressor |
| 05/01/2013 | EP2587059A1 Portable, rotary vane vacuum pump with removable oil reservoir cartridge |
| 05/01/2013 | CN103075347A Gap self-adaptive mixed type dual-sealing structure for roots pump drive end |
| 05/01/2013 | CN103075346A Universal sealing cap for large-diameter and small-diameter pipes |
| 04/25/2013 | WO2013057946A1 Rotary compressor having two cylinders |
| 04/24/2013 | CN202900665U Oil-water mixed lubrication type shaft seal device for spray cooling screw compressor |
| 04/24/2013 | CN202900657U Screw compressor and oil way circulating system as well as air conditioning unit |
| 04/24/2013 | CN103062058A Sealed impeller of fan |
| 04/18/2013 | WO2013053062A1 Belt and support for a rotor mechanism in a rotary apparatus and rotary apparatus comprising same |
| 04/18/2013 | CA2851716A1 Belt and support for a rotor mechanism in a rotary apparatus and rotary apparatus comprising same |
| 04/17/2013 | CN103047143A Sealing impeller for Roots blower |
| 04/17/2013 | CN103047140A Sliding vane pump and compressor with similar structure |
| 04/11/2013 | CA2851302A1 Pump fittings and methods for their manufacture |
| 04/10/2013 | CN202867220U Mechanical seal structure of roots vacuum pump |
| 04/10/2013 | CN103032319A Oil-free and micro-oil scroll fluid displacement device |
| 04/10/2013 | CN101975167B Compressor control system |
| 04/04/2013 | WO2012004762A3 Pump with a vane rotor |
| 04/03/2013 | CN103016345A Scroll machine |
| 04/03/2013 | CN103016344A Scroll machine |
| 03/27/2013 | CN1892034B Two stage type screw compressor |
| 03/27/2013 | CN102996447A Scroll machine |
| 03/20/2013 | CN102979730A Roots pump |
| 03/19/2013 | US8398387 Fluid machine and refrigeration cycle apparatus |
| 03/14/2013 | US20130064703 Scroll compressor |
| 03/13/2013 | CN102094824B Self-sealing mechanism of scroll compressor |
| 03/06/2013 | CN202768402U Roots-type pump with mechanical seal structure |
| 03/06/2013 | CN102953989A Floating scroll compressor |
| 02/27/2013 | EP2562422A1 Rotary fluid machine |
| 02/27/2013 | CN202756245U Sway piston type electric vacuum pump |
| 02/26/2013 | US8382462 Vane pump with circulating oil supply passage |
| 02/20/2013 | EP2558727A2 Liquid ring pump and method for operating a liquid ring pump |
| 02/14/2013 | US20130036762 Scroll type device including compressor and expander functions in a single scroll plate pair |
| 02/13/2013 | CN102933852A Liquid ring pump and method for operating a liquid ring pump |
| 02/13/2013 | CN102927006A 摇摆活塞式电动真空泵 Rocking Piston electric vacuum pump |
| 02/07/2013 | WO2013018272A1 Pump system for gas exhaust and gas exhaust method |
| 01/23/2013 | CN102889208A Scroll compressor with axially flexible seal |
| 01/17/2013 | WO2013008399A1 Rotary mechanism of gas exhaust pump, method for producing same, gas exhaust pump provided with said rotary mechanism, and method for producing same |
| 01/16/2013 | CN202673687U Integral type sliding vane rotary vacuum pump |
| 01/16/2013 | CN202673683U Single screw steam compressor |
| 01/09/2013 | CN202659499U Roots blower applied to calcium carbonate industry |
| 01/09/2013 | CN102052319B 蒸汽压缩机 Steam compressor |
| 01/08/2013 | US8348623 Apparatus and a method for regulation of the energy potential in a fluid column located within a pipeline |
| 01/03/2013 | US20130004353 Partition and partition chamber for rotary engines |
| 01/02/2013 | CN202646681U Sealing ring and screw compressor with sealing ring |
| 01/02/2013 | CN1900526B Capacity modulated scroll machine |
| 12/26/2012 | CN202628513U 涡旋压缩机 Scroll Compressor |
| 12/20/2012 | CA2745009A1 Steam-generator and gas-compressor systems using water-based evaporation coolants, sealants and lubricants |
| 12/19/2012 | CN202612112U Novel vertical oil-less pump |
| 12/19/2012 | CN102828953A Roots pump of mechanical sealing structure |
| 12/12/2012 | EP2532895A1 Vacuum pump with pump rotor bearings on a single side |
| 12/12/2012 | CN101652569B Displacement machine according to the spiral principle |
| 12/04/2012 | US8323010 Expander-compressor unit |
| 11/28/2012 | EP2527693A1 Shaft sealing structure and rotary fluid machine |
| 11/28/2012 | CN102797678A Shaft sealing structure and rotary fluid machine |
| 11/21/2012 | EP2524143A2 Formed seal ring for a liquid gas separating element |
| 11/21/2012 | CN202545253U Floating combined sealing structure of vehicle-mounted dry type screw compressor |
| 11/14/2012 | CN202531432U Shaft end sealing system for driving shaft of Roots blower |
| 11/14/2012 | CN202531431U Vertical claw type vacuum pump |
| 11/06/2012 | US8303281 Gear type performance oil pump |
| 10/25/2012 | DE10158768B4 Radialkolbenpumpe Radial piston pump |
| 10/24/2012 | CN202500774U Composite sealing device for Roots blower end cover |
| 10/24/2012 | CN102748290A Axial sealing mechanism of vortex compressor |
| 10/18/2012 | US20120263617 Positive Displacement Rotary System |
| 10/17/2012 | CN102734163A Air compressor |
| 10/04/2012 | WO2012131317A1 Scroll compressor |