| Patents for F04C 18 - Rotary-piston pumps specially adapted for elastic fluids (19,462) |
|---|
| 04/17/1990 | US4917582 Horizontal scroll compressor with oil pump |
| 04/17/1990 | US4917578 Variable capacity compressor |
| 04/17/1990 | US4916914 Air conditioning, heat pumps |
| 04/11/1990 | EP0363112A2 Power transmission |
| 04/11/1990 | EP0362865A2 Multi-section vacuum pump |
| 04/10/1990 | US4915604 Rotors for a screw fluid machine |
| 04/07/1990 | CA2000407A1 Positive displacement compressor |
| 04/04/1990 | CN1007446B Rotary compressor |
| 04/03/1990 | US4913636 Rotary vane device with fluid pressure biased vanes |
| 04/03/1990 | US4913635 Scroll type compressor with sealing structure for fixed scroll end plate |
| 04/03/1990 | US4913634 Screw compressor with slide valve movement preventing structure |
| 04/03/1990 | CA1267396A1 Rotor anti-reverse rotation arrangement in a screw compressor |
| 04/03/1990 | CA1267395A1 Rotary compressor relief valve |
| 03/28/1990 | EP0360756A2 Wobbling drive for an orbitally moving member |
| 03/28/1990 | EP0359798A1 Method of machining scroll components |
| 03/27/1990 | US4911949 Embedding heated metal parts in resin; coating; heat treatment |
| 03/27/1990 | US4911624 Reduced friction vane design for rotary compressors |
| 03/27/1990 | US4911621 Scroll fluid device using flexible toothed ring synchronizer |
| 03/27/1990 | US4911620 Scroll compressor top cover plate |
| 03/21/1990 | EP0359423A2 Multi-section roots vacuum pump of reverse flow cooling type |
| 03/20/1990 | US4909716 Screw step drive internal volume ratio varying system for helical screw rotary compressor |
| 03/15/1990 | DE3928778A1 Detecting approach positions between stator and rotor - by detecting contact in test circuit connected to stator and rotor shaft of spiral loader |
| 03/14/1990 | CN1040417A 旋转压缩机 Rotary compressor |
| 03/13/1990 | US4908077 Scroll made of aluminum alloy |
| 03/08/1990 | WO1990002248A1 Synchronizing and unloading system for scroll fluid device |
| 03/07/1990 | CN1007076B Exhaust end base of oil injection threaded bolt refrigerating compressor |
| 02/28/1990 | EP0355260A2 Screw type vacuum pump |
| 02/28/1990 | CN1007000B Dry-type vacuum pump |
| 02/28/1990 | CN1006995B Rotating piston machinery meshed with one side |
| 02/27/1990 | US4904302 Roller in rotary compressor and method for producing the same |
| 02/27/1990 | US4904170 Scroll-type fluid machine with different terminal end wrap angles |
| 02/27/1990 | US4904169 Scroll type compressing apparatus having strengthened scroll member |
| 02/27/1990 | US4904165 Muffler/check valve assembly for scroll compressor |
| 02/27/1990 | US4904164 Scroll type compressor with variable displacement mechanism |
| 02/14/1990 | EP0354867A2 Scroll type compressor |
| 02/14/1990 | EP0354342A1 Scroll-type fluid displacement machine |
| 02/13/1990 | US4900239 Method and a screw machine for processing fluid under high pressures, with liquid injection between a sealing portion and a support portion of the gate-rotor |
| 02/07/1990 | EP0354161A2 Muffler/check valve assembly for scroll compressor |
| 02/07/1990 | CN1039469A Fluid compressor |
| 02/06/1990 | US4898526 Vane pump with axial inlet and peripheral tangential outlet |
| 02/06/1990 | US4898521 Oil feeding system for scroll compressor |
| 01/31/1990 | CN2052067U Direct-connection low-noise vacuum pump |
| 01/25/1990 | DE3824426A1 Vane-cell compressor |
| 01/24/1990 | EP0351690A1 Rotary scroll compressor for compressible fluids |
| 01/23/1990 | US4895501 Rotary compressor with vane positioned to reduce noise |
| 01/23/1990 | US4895496 Refrigeration compressor |
| 01/17/1990 | EP0350790A2 Scroll type compressor |
| 01/17/1990 | CN2051294U Micro-type electric aerating machine |
| 01/17/1990 | CN1038860A 致冷压缩机 Refrigeration compressor |
| 01/10/1990 | EP0350426A2 Common compression zone access ports for positive displacement compressor |
| 01/10/1990 | EP0349574A1 Screw rotor machine. |
| 01/09/1990 | US4893044 Rotor balancing |
| 01/09/1990 | US4892469 Compact scroll-type fluid compressor with swing-link driving means |
| 01/03/1990 | EP0349170A2 Supercharger with torsion damping mechanism |
| 01/03/1990 | EP0348936A2 A scroll gas compressor |
| 01/03/1990 | EP0348601A2 Scroll compressor |
| 01/03/1990 | EP0348591A2 Screw type mechanical supercharger |
| 01/03/1990 | EP0276252B1 Screw rotor compressor |
| 01/02/1990 | US4890991 Screw rotor assembly for screw compressor |
| 01/02/1990 | US4890987 Scroll type compressor with seal supporting anti-wear plate portions |
| 12/28/1989 | WO1989012730A1 Scroll fluid device using flexible toothed ring synchronizer |
| 12/26/1989 | US4889475 Twin rotary compressor with suction accumulator |
| 12/26/1989 | US4889474 Air conditioning system with variable capacity compressor |
| 12/26/1989 | US4889471 Mechanism for prevention of burning of bearing portions in a hermetic type scroll compressor |
| 12/21/1989 | DE3820585A1 Vacuum pump |
| 12/20/1989 | EP0259333B1 Refrigeration plant and rotary positive displacement machine |
| 12/20/1989 | CN1006178B Circular-arc teeth shape of screw type compressor rotor |
| 12/20/1989 | CN1006177B Scroll type compressor with variable displacement mechanism |
| 12/20/1989 | CN1006175B Pump with half-round cam rotor |
| 12/19/1989 | US4887943 Gas compressor of variable volume |
| 12/19/1989 | US4887580 Supercharger device for reciprocating internal combustion engines, particularly for motor vehicles |
| 12/13/1989 | EP0345919A2 Refrigeration compressor |
| 12/12/1989 | US4886436 Lubricating arrangement for a shaft seal in a vane type compressor |
| 12/12/1989 | US4886434 Scroll compressor having discharge part communicating with two compression spaces simultaneously |
| 12/12/1989 | US4886433 Displacement machine having spiral chamber and displacement member of increasing radial widths |
| 12/12/1989 | US4886425 Capacity control device of scroll-type fluid compressor |
| 12/06/1989 | EP0344945A2 Supercharger with torsion damping |
| 12/05/1989 | US4884956 Rotary compressor with clearance volumes to offset pulsations |
| 12/05/1989 | US4884955 Scroll compressor having oil-actuated compliance mechanism |
| 11/29/1989 | EP0343662A2 Rotary displacement compression heat transfer systems incorporating highly fluorinated refrigerant-synthetic oil lubricant compositions |
| 11/28/1989 | US4883414 Rotating piston compressor |
| 11/28/1989 | US4883413 Rotary spiral piston displacement machine having a silicon rubber biased seal |
| 11/23/1989 | DE3816693A1 Rotary piston compressor |
| 11/21/1989 | US4881878 Gas compressor of variable volume |
| 11/15/1989 | EP0342057A2 Scroll type fluid apparatus |
| 11/15/1989 | EP0341408A2 Compressor lubrication system with vent |
| 11/15/1989 | EP0341407A2 Scroll compressor top cover plate |
| 11/15/1989 | EP0341403A2 Scroll compressor |
| 11/15/1989 | EP0341402A2 Scroll compressor having oil actuated compliance mechanism |
| 11/14/1989 | US4880367 Rigid support structure for single screw compressors |
| 11/09/1989 | DE3913577A1 Auslassventil fuer einen verdichter Exhaust valve for a compressor |
| 11/08/1989 | CN2047313U Hinged piston type compressor |
| 11/07/1989 | US4878820 Screw compressor |
| 11/07/1989 | US4878818 Common compression zone access ports for positive displacement compressor |
| 11/07/1989 | US4878814 Variable capacity compressor with capacity-indicating device |
| 11/02/1989 | WO1989010489A1 Lift valve in a rotary screw machine |
| 11/02/1989 | WO1989010487A1 Roller-blade hydraulic machine |
| 10/31/1989 | US4877382 Scroll-type machine with axially compliant mounting |
| 10/31/1989 | US4877380 Control system for controlling the internal volume in a rotary compressor |
| 10/25/1989 | EP0338835A2 Scroll type compressor |