| Patents for F04C 19 - Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids (784) |
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| 05/20/2009 | CN201241829Y Low vibration and low energy consumption electric machine overhead type single-stage sliding valve vacuum pump |
| 04/29/2009 | CN101418799A Downward moving water ring vacuum pump station for coal mine |
| 04/29/2009 | CN101418798A Whorl-reducing blocks |
| 04/29/2009 | CN100482946C Liquid ring pump |
| 04/15/2009 | CN101408177A Rotor seal device of rotary compressor |
| 03/11/2009 | CN201206551Y Single-stage cantalever radial air intake and exhaust double-action liquid ring pump |
| 02/10/2009 | US7488158 Fluid transfer using devices with rotatable housings |
| 02/04/2009 | CN201190701Y Pendular ring type vacuum pump with anti-cavitation device |
| 01/28/2009 | CN101354042A Control method for reducing oil-jetting apparatus of rotary compressor and uses thereof |
| 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 |
| 12/16/2008 | US7465375 Liquid ring pumps with hermetically sealed motor rotors |
| 12/03/2008 | CN201159175Y Corrosion protection type water-ring vacuum pump with stainless steel inner lining |
| 10/23/2008 | US20080260543 Liquid ring compressor |
| 08/27/2008 | CN100414107C Screw type liquid ring pump |
| 08/13/2008 | CN201100235Y Gas-liquid separator for efficient liquid ring pump |
| 08/05/2008 | CA2525480C Liquid ring pump |
| 07/24/2008 | WO2008089437A1 Vacuum pump with wear adjustment |
| 07/24/2008 | US20080175723 Vacuum pump with wear adjustment |
| 07/24/2008 | US20080175722 Vacuum pump with wear adjustment |
| 07/23/2008 | CN100404868C Liquid ring pump |
| 07/10/2008 | WO2008080437A1 Suction pipe |
| 07/10/2008 | WO2008054254A3 Centrifugal positive-displacement dynamic machine |
| 07/10/2008 | DE102007001770A1 Saugrohr Suction tube |
| 07/02/2008 | CN100398830C Liquid ring type pump |
| 07/01/2008 | US7392988 Rotary seal |
| 06/18/2008 | CN201074599Y Low noise water-ring vacuum pump |
| 06/18/2008 | CN101201051A Two stage conical liquid ring pump |
| 06/11/2008 | CN101198792A Liquid ring compressor |
| 06/05/2008 | US20080133181 Locally Powered Water Distillation System |
| 05/29/2008 | DE102006056005A1 Eccentric fluid ring compressor for high pressure application, has hub projecting axially over hold-up locking ring and comprising locking plates, and cylinder comprising another pair of locking plates perpendicular to hub |
| 05/08/2008 | WO2008054254A2 Centrifugal positive-displacement dynamic machine |
| 05/08/2008 | US20080105610 Pressurized Vapor Cycle Liquid Distillation |
| 05/08/2008 | US20080105533 Pressurized Vapor Cycle Liquid Distillation |
| 05/08/2008 | US20080105532 Distilling liquid by vaporizing to form vapor to fill head chamber, compressing vapor by rotating in liquid ring pump using internal drive shaft and eccentric rotor with rotatable housing and motor having rotor and motor magnets hermetically sealed, condensing; compact, inexpensive; water purification |
| 05/08/2008 | US20080105530 Pressurized Vapor Cycle Liquid Distillation |
| 05/08/2008 | US20080105403 Pressurized Vapor Cycle Liquid Distillation |
| 04/08/2008 | US7354253 Oil pump |
| 03/18/2008 | CA2523958C Liquid ring pump |
| 03/12/2008 | EP1896726A1 Liquid ring compressor |
| 03/11/2008 | US7340879 Locally powered water distillation system |
| 02/27/2008 | EP1892419A2 Two stage conical liquid ring pump having removable manifold, shims and first and second stage head o'ring receiving boss |
| 02/27/2008 | CN201027652Y Liquid-ring type chlorine pump |
| 02/14/2008 | US20080038120 Two stage conical liquid ring pump having removable manifold, shims and first and second stage head o-ring receiving boss |
| 02/13/2008 | CN101124410A Ejector pump |
| 02/11/2008 | CA2594033A1 Two stage conical liquid ring pump having removable manifold, shims and first and second stage head o-ring receiving boss |
| 01/30/2008 | CN201013596Y Two stage liquid-ring compressor |
| 01/24/2008 | WO2008009048A1 Liquid ring pump system |
| 01/23/2008 | EP1502028B1 Liquid ring compressor |
| 01/03/2008 | DE102006030198A1 Eccentric liquid ring compressor e.g. for eccentric ring compressor, has rotating housing cap with compressor has vertically arranged housing cylinder which rotates around vertical axis cylinder |
| 11/29/2007 | WO2007135513A1 Systems and methods for managing fluids in a processing environment using a liquid ring pump and reclamation system |
| 11/29/2007 | WO2007135504A1 Systems and methods for managing fluids using a liquid ring pump |
| 11/14/2007 | EP1855010A1 Single-stage liquid ring vacuum pump with suction and discharge manifold integrated in the central body. |
| 10/24/2007 | EP1846661A1 Ejector pump |
| 09/25/2007 | CA2226799C Two-stage liquid ring pumps |
| 08/30/2007 | DE102006009186A1 Fluid ring pump, with a powered impeller in a housing, has a control disk with pressure openings and a control opening with a sprung valve |
| 08/22/2007 | CN101023270A Method for operating a liquid ring compressor |
| 08/21/2007 | US7258143 System and method for regulating the volume of barrier fluid in a liquid ring vacuum pump |
| 08/15/2007 | EP1623121B1 Screw type liquid ring pump |
| 07/26/2007 | US20070172366 Screw type liquid ring pump |
| 06/28/2007 | WO2006096738A3 Method and apparatus for phase change enhancement |
| 06/27/2007 | CN1989345A Gas abatement |
| 06/13/2007 | EP1794458A1 Method for operating a liquid ring compressor |
| 05/09/2007 | CN2898373Y Oil-water separator of oil-ring vacuum pump |
| 04/04/2007 | EP1769158A1 Gas abatement |
| 03/22/2007 | US20070065298 Liquid ring pump |
| 03/21/2007 | CN1932292A Device for the performance adaptation of a liquid ring pump |
| 03/15/2007 | US20070059185 Device for the Performance Adaptation of a Liquid Ring Pump |
| 03/15/2007 | DE102005043434A1 Einrichtung zur Leistungsanpassung einer Flüssigkeitsringpumpe Device for performance adaptation of a liquid ring pump |
| 03/14/2007 | EP1762728A1 Device for the performance adaptation of a liquid ring pump |
| 03/07/2007 | CN2876382Y Automatic water drain device of water ring type air compressor air tank |
| 01/09/2007 | CA2161949C Pump for pumping fibrous pulp suspensions |
| 12/28/2006 | US20060292000 Liquid ring pump |
| 12/21/2006 | WO2006134590A1 Liquid ring compressor |
| 12/13/2006 | EP0961852B2 Pump for fibrous pulp suspension with means for separating gas from the suspension |
| 12/12/2006 | CA2315700C Multiflow liquid ring pump |
| 10/17/2006 | CA2240340C Mixed flow liquid ring pumps |
| 09/14/2006 | WO2006096738A2 Method and apparatus for phase change enhancement |
| 09/06/2006 | CN1273745C Gas Compressor |
| 08/30/2006 | CN1272548C Two-stage liquid ring pumps |
| 08/16/2006 | EP1690008A1 Fluid transfer using devices with rotatable housings |
| 08/10/2006 | WO2006082357A1 Ejector pump |
| 06/27/2006 | US7066718 Liquid ring compressor |
| 06/21/2006 | EP1672216A1 Pump having protection means against freezing |
| 06/21/2006 | CN1791752A Liquid ring pump |
| 06/21/2006 | CN1791751A 流体环气泵 Fluid ring pump |
| 06/07/2006 | CN1784545A Screw type liquid ring pump |
| 05/25/2006 | US20060110261 Pump system with vacuum source |
| 04/26/2006 | EP1649717A1 Systems and methods for distributed utilities |
| 03/23/2006 | WO2006029884A1 Method for operating a liquid ring compressor |
| 03/22/2006 | EP1552151B1 Liquid ring compressor |
| 02/23/2006 | US20060039797 Liquid ring compressor |
| 02/22/2006 | CN1738668A Pressurized vapor cycle liquid distillation |
| 02/08/2006 | EP1623121A1 Screw type liquid ring pump |
| 02/02/2006 | DE19530099B4 Wärmerückgewinnung in einem Flüssigkeitsringpumpen-Sperrflüssigkeitskühlersystem Heat recovery in a liquid ring pump seal liquid cooling system |
| 01/26/2006 | WO2006008521A1 Gas abatement |
| 01/11/2006 | EP1518055B1 Liquid ring pump |
| 12/08/2005 | US20050271520 Liquid ring compressor |
| 11/30/2005 | EP1600638A1 Two-stage fluid ring pump |