F04C 7 - Rotary-piston machines or pumps with fluid ring or the like

Patents for F04C 7 - Rotary-piston machines or pumps with fluid ring or the like (69)
02/2015
02/03/2015	US8944778 Liquid ring pump and method for operating a liquid ring pump
06/2014
06/25/2014	CN103890402A 带有整体粉碎器的螺杆型液体环泵 Screw-type liquid ring pumps with integral smash the
04/2014
04/23/2014	EP2721299A1 Screw type liquid ring pump with integrated macerator
04/02/2014	CN203516091U Large-sized water ring vacuum pump
01/2014
01/15/2014	CN203394758U Corrosion-resistant water ring pump with built-in separator
07/2013
07/25/2013	WO2013107888A1 Method and apparatus for mechanically heating a mixture of substances
04/2013
04/11/2013	US20130089440 Liquid ring pump and method for operating a liquid ring pump
02/2013
02/20/2013	EP2558727A2 Liquid ring pump and method for operating a liquid ring pump
12/2012
12/20/2012	WO2012173488A1 Screw type liquid ring pump with integrated macerator
09/2009
09/30/2009	CN100545458C Variable capacitance rotary compressor
08/2009
08/27/2009	WO2009103256A2 Sludge reactor pump for simultaneously conveying solids, liquids, vapours and gases
08/27/2009	CA2715987A1 Sludge reactor pump for simultaneously conveying solids, liquids, vapours and gases
08/19/2009	EP2090783A2 Mud reactor pump for simultaneous transport of solid material, liquids, steam and gases
07/2009
07/21/2009	CA2591490C Oscillating variable displacement ring pump
07/2008
07/10/2008	WO2008054254A3 Centrifugal positive-displacement dynamic machine
05/2008
05/08/2008	WO2008054254A2 Centrifugal positive-displacement dynamic machine
01/2008
01/09/2008	CN100360804C External circulation piston pump
11/2007
11/15/2007	US20070264145 Single-stage liquid-ring vacuum pump having double axial inlet
09/2007
09/25/2007	CA2226799C Two-stage liquid ring pumps
12/2006
12/20/2006	CN2849234Y External circulation piston pump
06/2006
06/21/2006	CN2789460Y External circulating rotary piston pump
06/21/2006	CN2789459Y External circulating rotary piston pump rotor
03/2006
03/29/2006	CN1752446A External circulation piston pump
08/2005
08/23/2005	US6932588 Variable capacity rotary compressor
08/2004
08/04/2004	CN1517559A Variable capacitance rotary compressor
07/2004
07/08/2004	US20040131490 Variable capacity rotary compressor
08/2002
08/07/2002	EP0956452B1 Impeller for a liquid ring machine
05/2001
05/02/2001	CN1065323C Liquid-ring type machine
11/2000
11/21/2000	US6149391 Hydraulic displacement machine
07/2000
07/04/2000	US6082973 Liquid ring machine having a rotor with sweeping edges for scraping-off deposits
05/2000
05/02/2000	CA2117297C Water ring type vacuum pump
11/1999
11/17/1999	EP0956452A1 Impeller for a liquid ring machine
07/1999
07/07/1999	CN2327810Y High performance pump with fluid ring
05/1999
05/12/1999	EP0915257A2 Positive displacement hydraulic machine
07/1998
07/02/1998	WO1998028542A1 Impeller for a liquid ring machine
06/1998
06/25/1998	DE19653746A1 Laufrad für eine Flüssigkeitsringmaschine Impeller for a liquid ring machine
07/1997
07/15/1997	US5647728 Liquid ring machine having pivoted outer housing
04/1997
04/09/1997	EP0766988A1 Separating device for separating liquid from a gas-liquid mixture
11/1996
11/13/1996	EP0742371A2 Liquid ring machine
11/13/1996	CN1135579A Liquid-ring type machine
08/1996
08/06/1996	US5542822 Liquid ring pump and separator container assembly
01/1996
01/31/1996	EP0694695A1 Supports for rotatable housings of liquid ring pumps
01/27/1996	CA2140178A1 Supports for rotatable housing of liquid ring pumps
11/1995
11/22/1995	EP0683322A2 Pump unit
03/1995
03/08/1995	CN2191301Y Liquid ring type chlorine pump
03/07/1995	US5395215 Supports for rotatable housing of liquid ring pumps
12/1993
12/01/1993	CN2148200Y 同步液环泵 Synchronous liquid ring pump
08/1993
08/11/1993	EP0554937A1 Liquid ring pump
05/1992
05/26/1992	CA1301544C Loop pump
10/1990
10/30/1990	CA1275573C Method and apparatus for increasing the operating efficiency of a liquid-flow machine
08/1990
08/15/1990	CN1009216B Loop pump
07/1990
07/18/1990	EP0277131B1 Loop pump
06/1989
06/27/1989	US4842486 Method and apparatus for increasing the operating efficiency of a liquid-flow machine
04/1989
04/11/1989	US4820134 Loop pump
11/1988
11/02/1988	CN87101507A Conical ring plate rotating piston pump
08/1988
08/10/1988	EP0277131A1 Loop pump.
07/1987
07/29/1987	EP0229970A1 Method and apparatus for the operation of liquid flow machines
06/1987
06/10/1987	CN86201697U Gas-liquid mixture pump
04/1987
04/23/1987	WO1987002425A1 Loop pump
04/22/1987	CN86106587A Loop pump
01/1985
01/15/1985	US4493615 Electro-rheological transducer
04/1984
04/17/1984	US4443158 Liquid ring pump with a control disk arranged between the impeller housing and the cover
10/1982
10/06/1982	EP0061626A1 Liquid-ring pump with a control disc mounted between an impeller casing and a cover comprising the fluid connexions
08/1982
08/17/1982	CA1129833A1 Liquid ring pump
06/1981
06/16/1981	US4273515 Liquid ring pump
08/1980
08/26/1980	CA1084459A1 Liquid ring pumps and compressors using a ferrofluidic ring liquid
06/1980
06/25/1980	EP0012544A1 Liquid ring pump
11/1977
11/08/1977	US4057368 Base frame construction for a liquid ring compressor set
09/1977
09/27/1977	US4050851 Liquid ring pumps and compressors using a ferrofluidic ring liquid