| Patents for F04C 19 - Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids (784) |
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| 02/01/2001 | DE19932632A1 Two-stage fluid ring machine |
| 01/31/2001 | EP1072797A1 Liquid ring pump with combined heat exchanger and separator |
| 01/24/2001 | CN1061131C Device for pumping high-vacuum degree |
| 01/10/2001 | EP1066472A1 Liquid ring pump |
| 10/11/2000 | EP1042614A1 Multiflow liquid ring pump |
| 10/10/2000 | US6130359 Phenol ring seal |
| 10/05/2000 | DE19913633A1 Liquid ring compressor for liquid ring pumps |
| 10/05/2000 | DE19913632A1 Liquid ring pump |
| 09/19/2000 | US6120253 Centrifuge gas and liquid piston compressor |
| 08/22/2000 | US6106239 Air flow apparatus for liquid ring vacuum pump |
| 07/05/2000 | CN1258817A Rotating drum liquid ring vacuum pump/compressor |
| 07/04/2000 | US6082973 Liquid ring machine having a rotor with sweeping edges for scraping-off deposits |
| 06/15/2000 | DE19847681C1 Flüssigkeitsringpumpe Liquid ring pump |
| 05/04/2000 | DE19825521C2 Flüssigkeitsringpumpe Liquid ring pump |
| 05/02/2000 | CA2117297C Water ring type vacuum pump |
| 04/27/2000 | WO2000023714A1 Liquid ring pump |
| 04/19/2000 | EP0993552A1 Liquid ring pump |
| 04/05/2000 | EP0842365B1 Liquid ring machine |
| 04/05/2000 | CN1249802A Liquid ring pump |
| 04/04/2000 | CA2131513C Method and apparatus for selectively varying the flow rate of service liquid through a two stage liquid ring vacuum pump |
| 03/23/2000 | WO2000015589A1 Liquid vacuum pump seal to reduce contamination in bisphenol-a |
| 02/02/2000 | EP0975875A1 Vacuum pump system fitted with a liquid mechanical pump |
| 01/27/2000 | DE19825521A1 Flüssigkeitsringpumpe Liquid ring pump |
| 01/13/2000 | DE19829446A1 Gas compression plant using fluid ring pump |
| 12/29/1999 | EP0967393A2 Liquid ring compressor |
| 12/23/1999 | WO1999066209A1 Pulp pump |
| 12/15/1999 | EP0964160A2 Liquid ring pump |
| 12/09/1999 | WO1999063230A1 Liquid ring pump |
| 12/08/1999 | EP0961852A1 Pump for fibrous pulp suspension with means for separating gas from the suspension |
| 11/17/1999 | EP0956452A1 Impeller for a liquid ring machine |
| 11/17/1999 | EP0956451A2 Gerotor pump for liquid media |
| 10/21/1999 | CA2235248A1 Improved air intake apparatus for liquid ring vacuum pump |
| 10/05/1999 | US5961295 Mixed flow liquid ring pumps |
| 09/30/1999 | WO1999049221A1 Liquid ring pump |
| 09/30/1999 | DE19812976A1 Flüssigkeitsringverdichter Liquid ring compressor |
| 09/29/1999 | EP0945621A1 Liquid ring compressor |
| 07/08/1999 | DE19758340A1 Mehrflutige Flüssigkeitsringpumpe Multi-flow liquid ring pump |
| 07/01/1999 | WO1999032791A1 Multiflow liquid ring pump |
| 06/02/1999 | EP0918936A1 Drive apparatus, such as a liquid ring machine and a method for driving a drive apparatus, such as transferring fluid |
| 05/14/1999 | CA2253135A1 Improved air flow apparatus for liquid ring vacuum pump |
| 05/06/1999 | DE19748120A1 Displacement pump for venting centrifugal pump |
| 05/04/1999 | US5899668 Two-stage liquid ring pumps having separate gas and liquid inlets to the second stage |
| 02/24/1999 | EP0898078A1 Liquid ring pump unit |
| 01/14/1999 | WO1999001668A1 Liquid ring pump |
| 01/13/1999 | CN1204737A Mixed flow liquid ring pumps |
| 01/07/1999 | EP0889243A1 Mixed flow liquid ring pumps |
| 01/07/1999 | EP0889242A1 Liquid ring compressor |
| 11/11/1998 | CN1040683C 机械式压缩机 Mechanical compressor |
| 11/05/1998 | WO1998026181A3 Gerotor pump for liquid media |
| 11/04/1998 | EP0804687B1 Liquid ring compressor/turbine and air conditioning systems utilizing the same |
| 11/04/1998 | EP0756670B1 Annular liquid gas pump |
| 10/22/1998 | WO1998046885A1 Vacuum pump system fitted with a liquid mechanical pump |
| 10/15/1998 | DE19715480A1 Vakuumpumpsystem mit einer Flüssigringpumpe Vacuum pump system with a liquid ring pump |
| 10/15/1998 | DE19714815A1 Liquid ring gas pump |
| 10/14/1998 | CN1196101A Pump for fibrous pulp suspension with means for separating gas from suspension |
| 09/08/1998 | US5803713 Multi-stage liquid ring vacuum pump-compressor |
| 09/01/1998 | US5800146 Liquid-ring gas pump with a silencing element in the discharge space |
| 08/05/1998 | EP0856664A1 Two-stage liquid ring pumps |
| 07/02/1998 | WO1998028542A1 Impeller for a liquid ring machine |
| 06/25/1998 | DE19727719C1 Rotary fluid pump for miniature vacuum pump |
| 06/25/1998 | DE19653746A1 Laufrad für eine Flüssigkeitsringmaschine Impeller for a liquid ring machine |
| 06/23/1998 | US5769609 Liquid ring compressor having a distribution groove for sealing |
| 06/18/1998 | WO1998026181A2 Gerotor pump for liquid media |
| 06/17/1998 | CN1185198A Liquid ring machine |
| 06/10/1998 | EP0799382B1 Liquid ring gas pump with a silencer in the pressure chamber |
| 05/20/1998 | EP0842365A1 Liquid ring machine |
| 04/23/1998 | DE19709223C1 Hydraulic machine with electro-meter powered impeller shaft e.g for pump |
| 04/07/1998 | US5735674 Liquid-ring gas pump |
| 03/03/1998 | US5722255 Liquid ring flash expander |
| 02/12/1998 | WO1998005866A1 Drive apparatus, such as a liquid ring machine and a method for driving a drive apparatus, such as transferring fluid |
| 02/11/1998 | EP0823553A2 Compressor assembly |
| 11/05/1997 | EP0804687A1 Liquid ring compressor/turbine and air conditioning systems utilizing the same |
| 10/08/1997 | EP0799382A1 Liquid ring gas pump with a silencer in the pressure chamber |
| 10/07/1997 | US5674058 Scroll-type refrigerant compressor |
| 09/10/1997 | CN1035837C Liquid ring gas pump |
| 08/13/1997 | EP0788402A1 An arrangement in autoclaving systems |
| 08/05/1997 | US5653582 Fluid bearing pad arrangement for liquid ring pump systems |
| 07/15/1997 | US5647728 Liquid ring machine having pivoted outer housing |
| 07/09/1997 | EP0631650B1 Liquid ring pumps with rotating liners |
| 06/17/1997 | US5639221 Liquid ring compressor with side shield located inlet separator |
| 06/10/1997 | US5636523 Liquid ring compressor/turbine and air conditioning systems utilizing same |
| 04/16/1997 | CN1147597A Ring liquid compression engine |
| 04/16/1997 | CN1147596A Ring Liquid Compression engine |
| 04/08/1997 | US5618164 Liquid ring compressor with plural after-cooler elements |
| 04/02/1997 | EP0766006A2 Liquid ring pump with rotating liner |
| 04/02/1997 | EP0680562B1 Liquid ring machine |
| 04/01/1997 | US5615997 Pump for pumping fibrous pulp suspension |
| 03/27/1997 | CA2185756A1 Fluid bearing pads |
| 03/26/1997 | CN1146233A Annular liquid gas pump |
| 03/25/1997 | US5613805 Device for cleaning contaminated topsoil |
| 03/13/1997 | WO1997009482A1 Pump for fibrous pulp suspension with means for separating gas from the suspension |
| 03/12/1997 | EP0761980A1 Fan having blades with flanges |
| 03/01/1997 | CA2184300A1 Fan having blades with flanges |
| 02/26/1997 | EP0759506A1 Liquid ring compressor |
| 02/26/1997 | CN1143719A Method for pumping high-vacuum degree |
| 02/25/1997 | US5605445 Liquid ring machine having a relief passage for excess liquid |
| 02/22/1997 | CA2183615A1 Liquid ring compressor |
| 02/19/1997 | EP0758717A1 Liquid ring compressor |
| 02/17/1997 | CA2183309A1 Liquid-ring compressor |
| 02/13/1997 | WO1997005392A1 Liquid ring machine |