| Patents for F04C 19 - Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids (784) |
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| 02/05/1997 | EP0756670A1 Annular liquid gas pump |
| 12/31/1996 | US5588806 Liquid ring machine and process for operating it |
| 11/14/1996 | DE19516814A1 The process is for low-loss operation of fluid ring vacuum pumps or compressors |
| 11/13/1996 | EP0742371A2 Liquid ring machine |
| 11/13/1996 | CN1135579A Liquid-ring type machine |
| 10/30/1996 | CN1134518A Compressor set |
| 10/16/1996 | EP0737813A1 Liquid sealing arrangement for liquid ring pumps |
| 08/21/1996 | EP0685038B1 Liquid ring machine and process for operating it |
| 08/06/1996 | US5542822 Liquid ring pump and separator container assembly |
| 07/25/1996 | WO1996022467A1 Liquid ring compressor/turbine and air conditioning systems utilizing the same |
| 07/24/1996 | EP0723082A1 Liquid ring machine with liquid separation device mounted in its housing |
| 07/04/1996 | WO1996020346A1 Liquid ring gas pump with a silencer in the pressure chamber |
| 06/12/1996 | EP0716232A1 Compression system |
| 05/02/1996 | WO1996012557A1 An arrangement in autoclaving systems |
| 04/30/1996 | US5511953 Mechanical compressor system |
| 04/24/1996 | CN2225560Y Two-stage corrosion resistant liquid ring vacuum pump |
| 04/23/1996 | US5509789 Liquid ring pump having a sheet metal working chamber casing |
| 04/16/1996 | US5507625 Liquid ring pumps |
| 03/20/1996 | EP0652791B1 Device for cleaning contaminated topsoil |
| 02/29/1996 | DE4429907A1 Vacuum generator using electrically-operated vacuum pump |
| 02/06/1996 | US5489195 Liquid ring pump having a sheet metal valve plate |
| 01/31/1996 | EP0694695A1 Supports for rotatable housings of liquid ring pumps |
| 01/27/1996 | CA2140178A1 Supports for rotatable housing of liquid ring pumps |
| 01/03/1996 | EP0639242B1 Liquid ring machine |
| 12/14/1995 | DE19520757A1 Worm compressor for motor vehicle air conditioning unit |
| 12/06/1995 | EP0685038A1 Liquid ring machine and process for operating it. |
| 11/29/1995 | CN1112652A 转子气体压缩机 Gas compressor rotor |
| 11/22/1995 | EP0683322A2 Pump unit |
| 11/08/1995 | EP0680562A1 Liquid ring machine. |
| 11/07/1995 | US5464329 Water ring type pump with sidewall water reflux passage |
| 11/02/1995 | WO1995029340A1 Annular liquid gas pump |
| 10/25/1995 | EP0678674A2 Liquid ring gas pump |
| 10/10/1995 | US5456827 Compressor system having a device for continuous cleaning of the auxiliary or working liquid |
| 09/26/1995 | US5452990 Foot arrangement for a liquid ring machine |
| 09/13/1995 | CN1108357A Mechanical commprssor |
| 07/19/1995 | CN1105425A Liquid ring gas pump |
| 06/28/1995 | CN2202205Y Water-ring vacuum pump of acid-proof ceramic |
| 06/08/1995 | WO1995015439A1 A device in a vacuum pump |
| 05/18/1995 | DE4339029A1 Hydraulic rotary machine with rotating housing |
| 05/17/1995 | EP0652791A1 Device for cleaning contaminated topsoil. |
| 03/30/1995 | CA2117622A1 Check valve structures for liquid ring pumps |
| 03/29/1995 | EP0645538A1 Method and apparatus for selectively varying the flow rate of service liquid through a two stage liquid ring vacuum pump |
| 03/29/1995 | EP0645537A1 check valve structures for liquid ring pumps |
| 03/29/1995 | EP0645521A1 Liquid ring gas pump |
| 03/28/1995 | US5401141 Multiple-flow liquid ring pump |
| 03/22/1995 | EP0644332A1 Liquid ring gas pump with noise suppression device |
| 03/22/1995 | EP0644317A1 Liquid ring pump |
| 03/07/1995 | US5395215 Supports for rotatable housing of liquid ring pumps |
| 02/15/1995 | EP0638723A1 Mechanical compressor |
| 01/25/1995 | EP0597866B1 Control unit for a liquid ring compressor |
| 01/25/1995 | EP0584106B1 Multiple flow, liquid ring pump |
| 01/12/1995 | DE4408861A1 Method and device for heat exchange in the operation of vacuum pumps |
| 01/04/1995 | EP0631650A1 Liquid ring pumps with rotating liners. |
| 12/28/1994 | EP0588840B1 Apparatus for continuously cleaning the auxiliary or working liquid of a compressor |
| 12/27/1994 | US5375980 Housing configuration for helical bladed fluid ring pump |
| 12/06/1994 | US5370502 Liquid ring pumps with pressurized gas supported rotating liners |
| 11/22/1994 | US5366348 Method and apparatus for selectively varying the flow rate of service liquid through a two stage liquid ring vacuum pump |
| 11/22/1994 | US5366347 Suspension pump with built-in variably eccentric liquid ring pump |
| 10/18/1994 | US5356268 Check valve structures for liquid ring pumps |
| 10/13/1994 | WO1994023210A1 Method for non-destructively compressing a reactive gas |
| 10/12/1994 | CN1093441A Method for non-destructively compressing a reactive gas |
| 09/21/1994 | EP0420886B1 Liquid ring compressor |
| 09/21/1994 | CN2177821Y Two-stage fluid ring type vacuum pump |
| 09/07/1994 | EP0614013A1 Liquid ring pump unit with separator |
| 09/01/1994 | WO1994019610A1 Liquid ring machine and process for operating it |
| 08/18/1994 | DE4327003C1 Liquid-ring machine |
| 08/04/1994 | WO1994017309A1 Liquid ring machine |
| 08/04/1994 | CA2154476A1 Liquid ring machine |
| 07/28/1994 | DE4301560A1 Fluid-ring vacuum pump with pressure compensation device |
| 07/21/1994 | WO1994016227A1 Liquid ring pumps with rotating liners |
| 07/21/1994 | CA2131533A1 Liquid ring pumps with rotating liners |
| 06/01/1994 | EP0599545A1 Liquid ring compressor/turbine and air conditioning systems utilizing same |
| 06/01/1994 | EP0599163A1 Liquid ring machine |
| 05/03/1994 | CA1329185C Separator in a liquid ring compressor unit |
| 04/27/1994 | CN2163254Y Energy saving radial dual-action liquid circulation pump |
| 04/05/1994 | US5299916 Liquid-ring pump having an outlet means including a noise reducing flexible membrane |
| 03/30/1994 | CN2160028Y 摩擦副式液环泵 Friction-type liquid ring pump |
| 03/23/1994 | EP0587843A1 Liquid-ring machine |
| 03/22/1994 | US5295794 Liquid ring pumps with rotating liners |
| 03/22/1994 | US5295792 Method for non-destructively compressing ozone gas |
| 03/10/1994 | DE4229017A1 Liquid ring compressor in engine block - has pair of oppositely placed channels connected to shaft seal cavity |
| 03/02/1994 | EP0584106A1 Multiple flow, liquid ring pump. |
| 03/01/1994 | US5290152 Manifold for a liquid ring vacuum pump-compressor |
| 02/17/1994 | WO1994003236A1 Device for cleaning contaminated topsoil |
| 02/17/1994 | DE4240871A1 Compressor operating on fluid piston principle - uses fluid medium to close one side of working chamber |
| 02/03/1994 | DE4225125A1 Vorrichtung zum Absaugen von Gasen aus dem Erdreich Device for suction of gases from the soil |
| 01/05/1994 | CN2152099Y Liquid ring pump with inclined elliptic body |
| 12/27/1993 | CA2098261A1 Liquid ring vacuum pump-compressor with rotor cone clearance concentrated in the seal segment |
| 12/15/1993 | CN2149499Y Fluid ring pump |
| 11/25/1993 | DE4214960C1 Flüssigkeitsringmaschine Liquid ring machine |
| 11/15/1993 | CA2093733A1 Liquid ring vacuum pump-compressor with double function of liquid ring with separate sources |
| 11/11/1993 | WO1993022562A1 Liquid ring machine |
| 11/03/1993 | EP0568187A1 Two-stage liquid ring pump with rotating liner in first stage supported by liquid from second stage |
| 10/30/1993 | CA2092263A1 Two-stage liquid ring pump with rotating liner in first stage supported by liquid from second stage |
| 10/20/1993 | EP0474697B1 Improvements in or relating to liquid ring machines |
| 10/14/1993 | WO1993020333A1 Liquid-ring machine |
| 10/13/1993 | EP0565232A1 Liquid ring pumps with improved housing shapes |
| 10/12/1993 | US5251593 Thermodynamic liquid ring machine |
| 10/10/1993 | CA2090184A1 Liquid ring pumps with improved housing shapes |
| 09/21/1993 | US5246348 Liquid ring vacuum pump-compressor with double function of liquid ring with separate sources |