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 18 - Rotary-piston pumps specially adapted for elastic fluids
Patents for F04C 18 - Rotary-piston pumps specially adapted for elastic fluids (19,462)
05/1998
05/27/1998CN1182835A Vortex compressor
05/27/1998CN1038526C Rotative compressor
05/26/1998US5755898 Scroll type compressor and method for manufacturing the same
05/26/1998US5755564 Scroll fluid machine having resilient member on the drive means
05/26/1998US5755271 Method for casting a scroll
05/22/1998WO1998021478A1 Twin-cylinder impeller pump
05/22/1998CA2242395A1 Twin-cylinder impeller pump
05/20/1998EP0843098A1 Scroll compressor
05/20/1998EP0843096A1 Coupling device for connecting a fuel pump and a vacuum pump having the same casing
05/20/1998EP0842721A1 Method for processing a rotor used for a super charger and the like
05/20/1998EP0842364A1 Calculation and precision processing of cardiocle and expanded cardioid casing curved surfaces for eccentric rotor vane pumps
05/20/1998EP0842363A2 Spiral compressor, useful in particular to generate compressed air for rail vehicles
05/20/1998EP0842362A1 Spiral compressor, useful in particular to generate compressed air for rail vehicles
05/20/1998DE19647321A1 Unlubricated scroll type fluid machine for air compressor, vacuum pump
05/20/1998CN1182175A Oil-free scroll compressor
05/20/1998CN1182174A Vane compressor
05/20/1998CN1038445C Fixed vane rotary compressor
05/20/1998CN1038444C 涡旋式压缩机 Scroll compressor
05/19/1998US5752816 Scroll fluid displacement apparatus with improved sealing means
05/19/1998US5752806 Method of reducing noise from the flow of gaseous media in a single rotation machine using a bypass for compression control
05/14/1998WO1998020259A2 Cascaded progressing cavity pump system
05/06/1998EP0840012A1 Scroll compressor
05/06/1998EP0840011A1 Scroll machine with reverse rotation sound attenuation
05/06/1998EP0839283A1 Oil-sealed vane-type rotary vacuum pump with oil feed
05/06/1998EP0839258A1 Scroll decompression device for cryogenic temperatures
05/06/1998CN1181128A Gas flow and lumbrication of scrool compressor
05/06/1998CN1180793A Backpressure cavity sealing device of vortex compressor
05/06/1998CN1180792A Vortex compressor
05/05/1998US5746586 Scroll compressor having positioning means for axially movable non-orbiting scroll
05/05/1998US5745992 Method of making a scroll-type machine
04/1998
04/30/1998WO1998017915A1 A screw compressor with adjustment slide means
04/30/1998WO1998017914A1 Rotor provided with shaft pivots
04/30/1998WO1998017895A1 Scroll fluid displacement apparatus with improved sealing means
04/29/1998EP0838594A1 Vane Compressor
04/29/1998EP0838593A1 Vane Compressor
04/29/1998EP0838592A1 Scroll type fluid machine having an improved oldham ring
04/29/1998EP0838012A1 Refrigerator or heat pump with a pulse tube operated by a pressure generator
04/28/1998US5743720 Scroll compressor with axial biasing
04/28/1998US5743719 Oil-free scroll vacuum pump having a gas ballast part
04/28/1998US5743169 Diaphragm assembly and method of manufacturing same
04/23/1998WO1998016745A1 Scroll element having a relieved thrust surface
04/22/1998EP0837243A1 Screw compressor especially for intermittent operation for the supply of air under pressure to railway vehicles
04/22/1998EP0647293B1 Piston unloader arrangement for screw compressors
04/22/1998CN1179513A Movable turbine of turbine compressor and its making method
04/22/1998CN1179512A Scroll-type compressor with variable displacement mechanism
04/21/1998US5741127 Vane for vane compressor
04/21/1998US5741120 Capacity modulated scroll machine
04/15/1998CN1178872A Volumetric liquid machinery
04/15/1998CN1038060C Swing rotary compressor
04/14/1998US5738504 Rotation preventing device for orbiting member of fluid displacement apparatus
04/09/1998WO1998014705A1 Oil separator for compressors, scroll compressor using same, and method of manufacturing oil separator for compressors
04/09/1998CA2238342A1 Oil separator for compressors, scroll compressor using same, and method of manufacturing oil separator for compressors
04/08/1998EP0834655A1 Delivery valve structure
04/08/1998EP0834018A1 Multistage, screw-spindle compressor
04/08/1998EP0834017A1 Vacuum pump
04/08/1998EP0686772B1 Rotary compressor----------------------------------------------
04/08/1998EP0671806B1 Method of and apparatus for assembling an electric motor capable of using a motor housing having low dimensional precision
04/08/1998CN1037991C Vortex compressor
04/07/1998USRE35760 Method of making a scroll compressor pump cartridge subassembly
04/07/1998US5735678 Scroll compressor having a separate stationary wrap element secured to a frame
04/07/1998US5735677 Scroll type fluid machine having recesses on the swivel scroll end plate
04/01/1998EP0833057A2 Scroll compressor
04/01/1998CN1177683A Vortex type fluid displacement device with abrasion-resistant plate mechanism
04/01/1998CN1177682A Vortex type fluid displacement device with abrasion-resistant plate mechanism
04/01/1998CN1177681A Oil-free scroll vacuum pump
03/1998
03/31/1998US5733112 Rotary compressor having a roller mounted eccentrically in a cylindrical chamber of a rotatable cylinder
03/31/1998CA2113043C Scroll compressor unloader valve
03/25/1998EP0831234A2 Scroll fluid machine
03/25/1998EP0683320B1 Swinging rotary compressor
03/25/1998CN1177063A Roots blower
03/25/1998CN1177062A Turbine type compressor
03/24/1998US5730588 Scroll compressor having a fixed scroll plate with groove
03/24/1998US5730586 Supercharger with integral by-pass passage
03/18/1998EP0828941A1 Variable-displacement screw-type compressor
03/18/1998EP0828940A1 Worm-drive compressor
03/18/1998CN1176680A Gas actuated slide valve in a screw compressor
03/18/1998CN1176350A Scroll-type compressor
03/17/1998US5727936 For introducing low pressure gas
03/17/1998US5727934 Scroll type fluid machine having a thin plate for each scroll
03/11/1998EP0828079A2 Lysholm compressors
03/11/1998EP0828078A2 Scroll-type compressor
03/11/1998CN2276084Y Negative pressure Roots blower
03/03/1998US5722816 Gas compressor
02/1998
02/25/1998CN1174594A Refrigerant compressor
02/25/1998CN1174297A Rotary compressor
02/25/1998CN1174296A Fluid conveyor
02/25/1998CN1174295A Scroll-type refrigerant fluid compressor
02/24/1998US5720602 Pressure biased co-rotational scroll apparatus with enhanced lubrication
02/18/1998CN1173622A Suction service valve
02/18/1998CN1173588A 流体机械 Fluid Machinery
02/11/1998EP0823025A1 Screw-type compressor with water hammer protection
02/11/1998CN1172909A Screw gas compressor
02/11/1998CN1172908A Rotary compressor
02/10/1998US5716202 Scroll compressor with oiling mechanism
02/05/1998DE19729615A1 Adjustable rotary piston machine
02/04/1998EP0822335A2 Scroll compressor
02/04/1998CN1172521A Rotary compressor with reduced lubrication sensitivity
02/03/1998US5713732 Rotary compressor
02/03/1998US5713731 Radial compliance mechanism for co-rotating scroll apparatus
02/03/1998US5713210 Sliding-blade refrigeration apparatus and method
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