Patents
Sitemap › F04 - Positive-displacement machines for liquids; Pumps for liquids or elastic fluids › F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquids; Rotary-piston, or oscillating-piston, positive-displacement pumps › F04C 27 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
Patents for F04C 27 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids (2,516)
05/1999
05/26/1999EP0918160A1 Compressor
05/20/1999WO1999009205A3 Diagnosis of clear cell type renal carcinoma
05/19/1999EP0916847A1 Compressor housing
05/18/1999CA2252157A1 Compressor housing
04/1999
04/27/1999US5897306 Partition and pilot ring for scroll machine
04/14/1999CN1042969C 涡旋压缩机 Scroll Compressor
04/08/1999WO1999017066A1 An adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor
04/01/1999WO1999015764A1 Scroll-type fluid displacement device having flow diverter, multiple tip seal and semi-radial compliant mechanism
03/1999
03/31/1999EP0904494A1 Scroll-type vacuum pumping apparatus
03/31/1999EP0904493A1 Process for starting a positive-displacement machine by the spiral principle and a positive-displacement machine suitable for carrying out said process
03/31/1999CN1212332A Scroll compressor and method of manufacturing same
03/18/1999WO1999013224A1 Oil-free screw rotor apparatus
03/17/1999CN1210946A Isolation sleeve for magnetic pump and its producing technology
03/11/1999WO1999011936A1 Scroll compressor with back pressure seal protection during reverse rotation
03/03/1999CN2309457Y Mechanical seal for pump
03/03/1999CN2309446Y Sealing socket sleeve for double-screw oil-gas mixed flowing pump
02/1999
02/25/1999WO1999009205A2 Diagnosis of clear cell type renal carcinoma
02/25/1999DE19736017A1 Vacuum pump or compressor for compacting gases
02/24/1999EP0898079A1 Intermediate pressure regulating valve for a scroll machine
02/23/1999US5873711 Scroll compressor with reduced separating force between fixed and orbiting scroll members
02/16/1999US5871338 Vacuum pump with a gas ballast device
02/04/1999DE19834033A1 Vacuum pump for brake servo
02/02/1999US5865441 Emission seal
01/1999
01/26/1999CA2133361C Rotary compressor thrust washer
12/1998
12/29/1998US5853287 Scroll compressor having a thrust plate
12/23/1998CN2301559Y Multi-blade wheel for Roots blower and pump
12/16/1998EP0884478A1 Lubricating and barrier system for compressor
12/16/1998CN1201872A 涡旋式压缩机 Scroll compressor
12/15/1998US5848883 Scroll compressor having a back pressure partitioning member
12/09/1998EP0882894A2 Scroll compressor
12/09/1998EP0882893A2 Scroll fluid displacement machine
12/09/1998EP0882892A1 Scroll type machine
12/09/1998CN1201115A Vortex compressor
12/08/1998US5846065 Scroll compressor with axial biasing
11/1998
11/18/1998EP0878627A1 Compressor with at least one compressor stage and a moisture separator
11/18/1998EP0878626A1 Scroll compressor
11/17/1998US5836753 Seal arrangement for engine-driven supercharger
11/17/1998CA2046245C Scroll type compressor with variable displacement mechanism
11/10/1998US5833443 Scroll compressor with reduced separating force between fixed and orbiting scroll members
11/10/1998US5833442 Scroll-type compressor having improved pressure equalizing passage configuration
11/04/1998CN1197892A Partition and pilot ring for scroll machine
11/03/1998US5829959 Scroll compressor
10/1998
10/28/1998EP0874158A1 Vacuum pump with shaft seal
10/21/1998EP0872641A1 Hermetic scroll compressor
10/21/1998CN1196776A Scroll compressor
10/20/1998US5823757 Axial sealing apparatus for scroll type compressor
10/20/1998US5823756 Scroll fluid discharging apparatus
10/01/1998WO1998042951A1 Steam-driven propeller engine
09/1998
09/22/1998US5810573 Scroll compressor having a baffle plate and oil passages in the orbiting scroll member
09/22/1998US5810553 Pump provided with at least one rotary shaft
09/17/1998WO1998040628A1 Pump with shaft seal
09/09/1998CN1192512A Whirl type air compressor
09/08/1998US5803722 Rotating scroll compressor having a movable bearing member
09/01/1998US5800149 Electrically-driven closed scroll compressor having means for minimizing an overturning moment to an orbiting scroll
08/1998
08/27/1998WO1998037327A1 Two stage vacuum pumping apparatus
08/27/1998CA2252755A1 Two stage vacuum pumping apparatus
08/26/1998EP0859914A1 Helical compressor
08/19/1998EP0859154A1 Device for sealing a rotor shaft and screw-type compressor provided with such a device
08/11/1998US5791886 Scroll type fluid displacement apparatus with an axial seal plate
08/05/1998CN1189582A Scroll compressor with controlled fluid venting to back pressure chamber
07/1998
07/29/1998EP0855512A1 Scroll compressor with controlled fluid venting to back pressure chamber
06/1998
06/30/1998US5772416 Scroll-type machine having lubricant passages
06/25/1998WO1998027341A1 New structure of roots blower or roots vacuum pump with a multi-lobes impeller and a reverse flow unit
06/24/1998CN1185540A Worm Comressor with small separation force between fixed and circular screw pieces
06/23/1998US5769609 Liquid ring compressor having a distribution groove for sealing
06/16/1998US5767186 Ptfe, carbon fibers, polyphenylene sulfide
06/09/1998US5762483 Scroll compressor with controlled fluid venting to back pressure chamber
06/02/1998US5759020 Scroll compressor having tip seals and idler crank assemblies
05/1998
05/20/1998EP0843098A1 Scroll compressor
05/20/1998EP0842363A2 Spiral compressor, useful in particular to generate compressed air for rail vehicles
05/19/1998US5752816 Scroll fluid displacement apparatus with improved sealing means
05/06/1998EP0840012A1 Scroll compressor
05/06/1998CN1180793A Backpressure cavity sealing device of vortex compressor
05/06/1998CN1180792A Vortex compressor
05/05/1998US5745992 Method of making a scroll-type machine
04/1998
04/30/1998WO1998017895A1 Scroll fluid displacement apparatus with improved sealing means
04/28/1998US5743720 Scroll compressor with axial biasing
04/22/1998EP0837243A1 Screw compressor especially for intermittent operation for the supply of air under pressure to railway vehicles
04/21/1998US5741120 Capacity modulated scroll machine
04/15/1998CN1178872A Volumetric liquid machinery
04/14/1998US5738505 Perfected twin-screw pump, particularly suitable for the pumping of biphase fluids in a submerged environment
03/1998
03/25/1998CN1177062A Turbine type compressor
03/04/1998CN1174951A 浮动机械密封装置 Floating mechanical seal device
02/1998
02/26/1998WO1998007988A1 Dry vacuum machine with shaft passage
02/26/1998DE19633651A1 Trockene Vakuummaschine mit Wellendurchführung Dry vacuum machine shaft bushing
02/24/1998US5720602 Pressure biased co-rotational scroll apparatus with enhanced lubrication
02/18/1998CN1173589A Enclosed compressor
01/1998
01/21/1998CN1170830A Closed compressor
01/14/1998CN1037022C Scroll-type fluid machine
01/08/1998DE19626515A1 Sealing rings for screw compressor
01/07/1998EP0816682A1 Scroll-type fluid displacement apparatus with axial sealing
12/1997
12/30/1997US5702241 Scroll-type fluid displacement apparatus having sealing means for central portions of the wraps
12/18/1997WO1997047888A1 Process for starting a positive-displacement machine by the spiral principle and a positive-displacement machine suitable for carrying out said process
12/18/1997DE19623215A1 Verfahren zur Inbetriebnahme einer Verdrängermaschine nach dem Spiralprinzip sowie für die Durchführung dieses Verfahrens geeignete Verdrängermaschine Commission a displacement using the spiral principle and for the implementation of this method suitable displacement
12/16/1997US5697771 Vacuum pump with oil separator
12/09/1997US5695327 Sealing, mounting and drive of the rotors of a dry-running screw compressor
12/04/1997WO1997045642A1 Scroll compressor
12/02/1997CA2019295C Scroll type fluid displacement apparatus
11/1997
11/27/1997WO1997044585A1 Spiral compressor
11/27/1997DE19642798A1 Spiralverdichter Scroll compressor
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