| Patents for F04C 23 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (6,201) |
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| 04/15/2004 | WO2004031585A1 Screw pump and method of operating the same |
| 04/15/2004 | US20040071576 Multi-stage compression type rotary compressor and a setting method of displacement volume ratio for the same |
| 04/15/2004 | US20040071570 Horizontal two stage rotary compressor |
| 04/15/2004 | US20040071567 Integrated air compressor |
| 04/15/2004 | US20040071562 Horizontal two stage rotary compressor with improved lubrication structure |
| 04/15/2004 | US20040071560 Rotary compressor |
| 04/15/2004 | DE10326730A1 Hybridkompressorsystem Hybrid compressor system |
| 04/15/2004 | CA2492495A1 Screw pump and method of operating the same |
| 04/14/2004 | EP1407148A1 Apparatus for controlling the pressure in a process chamber and method of operating same |
| 04/14/2004 | CN1489673A 涡旋压缩机 Scroll Compressor |
| 04/14/2004 | CN1488861A 旋转式压缩机 Rotary compressor |
| 04/13/2004 | US6719545 Scroll compressor having a back pressure chamber in a rotation preventing mechanism |
| 04/08/2004 | WO2004029523A2 Method and apparatus for highly efficient compact vapor compression cooling |
| 04/08/2004 | WO2004029462A1 Vane rotary type air pump |
| 04/08/2004 | WO2004029461A1 Scroll compressor |
| 04/08/2004 | US20040067144 Scroll compressor |
| 04/07/2004 | EP1405946A2 Drier with refrigerant circuit |
| 04/07/2004 | CN1487199A Multi-section compression type rotary compressor and set-up method of discharge volume ratio |
| 04/07/2004 | CN1487197A Vacuumproof device for vortex type compressor |
| 04/07/2004 | CN1144952C Single or several rotor positive displacement machine and single fluid compressing/expanding refrigerator |
| 04/06/2004 | US6716007 Variable capacity rotary compressor |
| 04/06/2004 | US6715999 Variable-capacity scroll-type compressor |
| 04/01/2004 | US20040062670 Scroll compressor |
| 04/01/2004 | US20040062668 Two-stage screw compressor |
| 04/01/2004 | DE19936644B4 Elektrische Luftpumpe für Kraftfahrzeuge Electric air pump for motor vehicles |
| 03/31/2004 | CN1485584A Geogrid or mesh structure |
| 03/25/2004 | WO2003083311B1 Motor pump |
| 03/25/2004 | US20040057859 Compressor having bearing support |
| 03/25/2004 | US20040057858 Compressor discharge assembly |
| 03/25/2004 | US20040057857 Compressor have counterweight shield |
| 03/25/2004 | US20040057849 Compressor assembly having baffle |
| 03/25/2004 | US20040057848 Compressor assembly having crankcase |
| 03/25/2004 | US20040057843 Compressor having discharge valve |
| 03/25/2004 | US20040057837 Compressor having alignment bushings and assembly method |
| 03/25/2004 | US20040055773 Conduit-ready terminal cover |
| 03/25/2004 | US20040055328 Scroll compressor and refrigerating system using ammonia group refrigerant |
| 03/25/2004 | DE10341104A1 Sealing system for spiral compressor has a ring seal on the back of the spiral support disc supported on an intermediate inner wall and containing a pressure space between the seal and a shaft seal |
| 03/24/2004 | EP1399677A1 Two-stage helical screw compressor |
| 03/24/2004 | CN1484586A Air conditioner |
| 03/24/2004 | CN1143062C Sealed compressor having pipe connectors and method of joining pipe connectors to sealed casing |
| 03/23/2004 | US6709248 Scroll-type fluid machine having an outer chamber and an inner chamber |
| 03/23/2004 | US6709247 Scroll compressor having a deflectable bearing housing for shaft alignment |
| 03/23/2004 | US6709244 Diagnostic system for a compressor |
| 03/23/2004 | US6708520 Scroll compressor and refrigerating system using ammonia group refrigerant |
| 03/18/2004 | US20040052660 Electric compressor |
| 03/18/2004 | US20040050246 Rotary fluid machine |
| 03/18/2004 | DE10242139A1 Schraubenverdichter Screw compressor |
| 03/18/2004 | DE10115648B4 Zweistufige Schraubenkompressoranlage und Verfahren zu ihrer Steuerung Two-stage screw compressor system and methods for their control |
| 03/17/2004 | EP1398509A2 Vacuum pump |
| 03/17/2004 | EP1398507A2 Multistage Roots-type vacuum pump |
| 03/17/2004 | EP1398506A2 Hermetic multistage vacuum pump |
| 03/17/2004 | CN1482364A 压缩机 Compressor |
| 03/11/2004 | US20040047755 Vacuum pump |
| 03/11/2004 | US20040047754 Oil shield as part of crankcase for a scroll compressor |
| 03/11/2004 | US20040045307 Hybrid compressor system |
| 03/10/2004 | EP1396640A2 Screw compressor |
| 03/10/2004 | CN1480788A Analyzing system of exposuring device, analyzing method, and program, and semiconductor element mfg. method |
| 03/10/2004 | CN1480695A Refrigerator |
| 03/10/2004 | CN1141533C Refrigerator |
| 03/05/2004 | CA2439510A1 Oil shield as part of crankcase for a scroll compressor |
| 03/04/2004 | WO2002097274A8 Vane pump rotor |
| 03/04/2004 | US20040042917 Scroll compressor |
| 03/04/2004 | US20040042911 Apparatus for changing capacity of scroll compressor |
| 03/04/2004 | US20040040339 Refrigerant cycling device and compressor using the same |
| 03/04/2004 | US20040040332 Screw compressor |
| 03/04/2004 | US20040040323 Refrigerating machine |
| 03/03/2004 | EP1394479A2 Refrigerant cycling device and compressor |
| 03/03/2004 | CN1479014A Displacement changing device of vortex compressor |
| 03/03/2004 | CN1479013A Vortex compressor |
| 03/02/2004 | US6699023 Multi-stage vacuum pump |
| 03/02/2004 | US6699022 Vacuum exhaust apparatuses and vacuum exhaust methods |
| 02/26/2004 | WO2004016997A1 Oil carry-over prevention from helium gas compressor |
| 02/26/2004 | US20040037711 Oil free screw compressor |
| 02/26/2004 | US20040037706 Compressor utilizing low volt power tapped from high volt power |
| 02/25/2004 | CN1478033A Device for emptying food storage container which can be sealed by means of valve |
| 02/24/2004 | US6695600 Scroll compressor |
| 02/24/2004 | US6695201 Stress relieved lower shell for sealed compressors |
| 02/19/2004 | US20040031384 Rotary fluid machinery |
| 02/19/2004 | US20040031283 Compressor having vibration reducing structure |
| 02/19/2004 | DE3745098B4 Kompressor der Spiralbauart Scroll type compressor |
| 02/18/2004 | CN1475673A Turbo machine having dual volume ratio |
| 02/18/2004 | CN1138925C Scroll machine with discharge duct |
| 02/17/2004 | US6692242 Multi-cylinder rotary compressor |
| 02/17/2004 | US6692205 Compressor incorporated with motor and its cooling jacket |
| 02/12/2004 | US20040030142 Method for producing n-alkoxy-n-alkylamides |
| 02/12/2004 | DE10333536A1 Electric compressor for cooling cycle device, has oil separator of lubricating oil from working fluid in compressor stage output region, oil retention chamber, return flow path to low pressure side |
| 02/11/2004 | EP1387961A1 Multi-stage screw compressor |
| 02/10/2004 | US6688864 Oil leak prevention structure of vacuum pump |
| 02/10/2004 | US6688863 Oil leak prevention structure of vacuum pump |
| 02/10/2004 | US6688857 Compressor and dehydrator system |
| 02/10/2004 | US6687992 Assembly method for hermetic scroll compressor |
| 02/05/2004 | WO2004011809A1 Horizontal rotary-type compressor |
| 02/05/2004 | WO2004011808A1 Compressor |
| 02/05/2004 | US20040022649 Vane supporting apparatus for hermetic compressor |
| 02/04/2004 | EP1387132A1 Apparatus having refrigeration cycle |
| 02/04/2004 | EP1387131A1 Apparatus having refrigeration cycle |
| 01/29/2004 | WO2004010001A1 Scroll compressor |
| 01/29/2004 | WO2003083311A3 Motor pump |
| 01/28/2004 | EP1384893A2 Electric motor and hermetic compressor |
| 01/28/2004 | CN1470767A 电动压缩机 Electric compressor |