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)
06/1999
06/23/1999CN2325560Y Pump for high temp., high glutinous and special medium
06/23/1999CN1220347A Scroll-type compressor and operation method therefor
06/23/1999CN1220346A Capacity-controlled scroll-type compressor having internally-bypassing system
06/23/1999CN1043800C 真空排放系统 Vacuum Release Systems
06/18/1999CA2256152A1 Capacity-controlled scroll-type compressor having internally-bypassing system
06/17/1999WO1999030005A1 Rotary positive-displacement machines
06/17/1999WO1999017023A3 Fluid compressor
06/17/1999WO1999015764A8 Scroll-type fluid displacement device having flow diverter, multiple tip seal and semi-radial compliant mechanism
06/16/1999EP0922860A1 Optimized location for scroll compressor economizer injection ports
06/16/1999CN1219649A Enhanced flow compressor discharge port entrance
06/16/1999CN1219648A Optimized location for scroll compressor economizer injection ports
06/16/1999CN1219647A Compressor of swirl
06/16/1999CN1219646A Vortex-type compressor
06/15/1999US5911743 Expansion/separation compressor system
06/15/1999US5911567 Positive displacement pump apparatus
06/15/1999US5911566 Rotation preventing mechanism having stabilized operation and a scroll-type fluid displacement apparatus comprising the rotation preventing mechanism
06/10/1999WO1999028630A1 Driven equipment for fluid machinery
06/10/1999WO1999028629A1 Rotary piston pump and method of operation
06/09/1999EP0921315A2 Compressor discharge port with valve
06/09/1999EP0839283B1 Oil-sealed vane-type rotary vacuum pump with oil feed
06/09/1999CN1218879A Translational multipurpose liquid pump
06/09/1999CN1218878A Volute compressor
06/09/1999CN1218877A Rotary compressor cylinder assembly
06/02/1999CN2321959Y Vortex compressor for car air conditioning
06/02/1999CN1218145A Compressor having capacity-controlling mechanism with abrasion-free cylinder
06/02/1999CN1218143A Hermetic compressor
05/1999
05/27/1999WO1999025954A1 Positive-displacement piston mechanism of rotary piston structure
05/25/1999CA2048664C Vacuum drainage system
05/20/1999WO1999024718A1 Hermetic scroll compressor
05/19/1999EP0916848A1 Compressor having capacity-controlling mechanism with abrasion-free cylinder
05/19/1999CN1216803A Scroll compressor with pressure equalization groove
05/18/1999US5904473 Vacuum pump
05/18/1999US5904472 Motor pump unit for a vapor return system
05/14/1999WO1999023528A2 Electrochromic system
05/14/1999CA2308308A1 Electrochromic system
05/12/1999DE19749572A1 Vacuum pump or dry running screw compactor
05/12/1999CN2318430Y 真空泵 Vacuum pump
05/06/1999EP0913581A1 Scroll compressor with pressure equalization groove
05/06/1999EP0913580A1 Scroll-type fluid machine
05/06/1999EP0630441B1 Screw compressor providing thrust bearing force compensation
05/06/1999DE19748385A1 Vacuum pump or compressor
05/06/1999DE19748358A1 Elektrochromes System Electrochromic system
05/05/1999CN1215807A Exhaust valve fixing apparatus for hermetically sealed compressor
05/05/1999CN1215806A Improved lubrication systems for scroll compressors
05/05/1999CN1215804A Scroll-type fluid machine including float-protecting pin having partially-cut head
05/05/1999CN1215803A Scroll compressor having improved check valve and top plate for releasing compressed gas
05/05/1999CN1215802A Scroll type compressor with two-piece top plate of improved structure
05/05/1999CN1215801A Helical impeller compressor
05/05/1999CN1215800A Helical compressor and method of assembling the same
05/04/1999US5899677 Vane compressor having a high-pressure space formed in the cam ring
05/04/1999US5899676 Oldham coupling mechanism for a scroll type fluid displacement apparatus
04/1999
04/28/1999EP0911526A1 Lubrication systems for scroll compressors
04/28/1999CN2316489Y Rotor pump without turning clearance
04/28/1999CN1215133A Fluid machinery
04/27/1999US5897047 Method of connecting steel part with aluminum part and product made by the same
04/27/1999CA2097567C Scroll type fluid apparatus
04/22/1999WO1999019631A1 Screw vacuum pump provided with rotors
04/22/1999WO1999019630A1 Cooled screw vacuum pump
04/22/1999DE19744466A1 Screw compressor for gases, with driven- and auxiliary rotors
04/21/1999CN2315335Y Blade vacuum pump
04/21/1999CN1214410A 转子压缩机 Rotary Compressor
04/15/1999WO1999018425A1 Multi-lobe pump for particle counters
04/15/1999WO1999018355A1 Screw-type compressor
04/15/1999DE19745616A1 Cooling system for helical vacuum pump
04/15/1999DE19745615A1 Screw vacuum pump with rotors
04/14/1999CN1213745A 流体机械 Fluid Machinery
04/14/1999CN1213744A Scroll compressor with economizer fluid passage defined adjacent end face of fixed scroll
04/14/1999CN1042969C 涡旋压缩机 Scroll Compressor
04/13/1999CA2079261C Co-rotational scroll compressor supercharger device
04/08/1999WO1999017066A1 An adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor
04/08/1999WO1999017023A2 Fluid compressor
04/07/1999EP0907026A1 Scroll compressor with economizer fluid passage defined adjacent end face of fixed scroll
04/07/1999EP0907025A1 Scroll compressor
04/07/1999EP0907024A1 Scroll type compressor
04/07/1999EP0746670B1 Meshing type rotors
04/07/1999CN1042851C 旋转式压缩机 Rotary compressor
04/06/1999US5890884 Screw-type compressor with liquid lock protection
04/01/1999WO1999015764A1 Scroll-type fluid displacement device having flow diverter, multiple tip seal and semi-radial compliant mechanism
04/01/1999WO1999015763A1 Generalized minimum diameter scroll component
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
03/31/1999EP0904492A1 Displacement machine on the spiral principle
03/31/1999EP0746685B1 Scroll compressor drive having a brake
03/31/1999CN1212333A Oil-cooled type screw compressor
03/31/1999CN1212332A Scroll compressor and method of manufacturing same
03/30/1999US5888057 Scroll-type refrigerant fluid compressor having a lubrication path through the orbiting scroll
03/25/1999WO1999014511A1 Sliding member and refrigerating compressor using the same
03/25/1999WO1999014502A1 Spiral vacuum pump
03/25/1999WO1999013865A1 Sustained-release liposomal anesthetic compositions
03/25/1999DE19842050A1 Worm conveyor for liquids
03/25/1999CA2304018A1 Spiral vacuum pump
03/24/1999EP0903499A2 Scroll compressor
03/24/1999CN2311634Y Double-cam follower blade pump
03/24/1999CN1211687A Scroll compressor with reverse offset at wrap tips
03/24/1999CN1211686A Helical lobe compressor
03/23/1999US5885063 Variable capacity scroll compressor
03/23/1999CA2068776C Scroll type fluid displacement apparatus having a capacity control mechanism
03/18/1999WO1999013224A1 Oil-free screw rotor apparatus
03/17/1999EP0902188A1 Screw compressor
03/17/1999EP0902187A1 Scroll type compressor with soft start
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