| 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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| 01/24/1995 | US5383772 Scroll compressor stabilizer ring |
| 01/17/1995 | US5382143 Scroll type compressor having a thrust plate in a frame recess |
| 01/10/1995 | US5379516 Scroll compressor pump cartridge assembly |
| 01/03/1995 | US5378128 Multi-stage screw vacuum pump |
| 12/22/1994 | DE4422315A1 Spiral compressor |
| 12/21/1994 | CN1096569A 压缩机 Compressor |
| 12/20/1994 | US5374170 Screw vacuum pump |
| 12/20/1994 | US5374166 Motor driven fluid compressor within hermetic housing |
| 12/13/1994 | US5372489 Two stage vane type compressor |
| 12/08/1994 | DE4318737A1 Rotary piston compressor |
| 12/01/1994 | DE4413940A1 Sludge pump |
| 11/22/1994 | US5366352 Thermostatic compressor suction inlet duct valve |
| 11/16/1994 | CN1095152A 致冷剂循环系统 Refrigerant circulating system |
| 11/15/1994 | US5364245 Dry-running twin-shaft vacuum pump |
| 11/15/1994 | CA1333065C Scroll apparatus with modified scroll profile |
| 11/10/1994 | WO1994025807A1 Refrigeration compressor |
| 11/09/1994 | EP0623749A1 Rotary gas compressor |
| 11/09/1994 | EP0623748A1 Scroll compressor |
| 11/09/1994 | EP0623747A1 Scroll compressor pump cartridge assembly |
| 11/02/1994 | EP0622445A1 Refrigerant circulating system |
| 10/26/1994 | CN1093978A Sound abatement in rotary compressors |
| 10/25/1994 | US5358391 Hermetic compressor with heat shield |
| 10/25/1994 | US5358387 Oil-free scroll compressor |
| 10/19/1994 | CN1093777A Rotative bed compressor |
| 10/18/1994 | US5356275 Device for supplying a multi-stage dry-running vacuum pump with inert gas |
| 10/18/1994 | CA1332593C Scroll gas compressor |
| 10/11/1994 | US5354179 Fluid rotating apparatus |
| 10/11/1994 | CA1332387C Pre-testable and repairable hermetic scroll type compressor |
| 10/04/1994 | US5352097 Vacuum pump |
| 09/13/1994 | US5345785 Scroll compressor and air conditioner using the same |
| 09/07/1994 | EP0614013A1 Liquid ring pump unit with separator |
| 08/30/1994 | US5342185 Muffler plate for scroll machine |
| 08/23/1994 | US5340287 Scroll-type compressor having a plate preventing excess lift of the crankshaft |
| 08/17/1994 | EP0574442B1 Device for supplying a multi-stage dry-running vacuum pump with inert gas |
| 08/16/1994 | US5338167 Dry-running vacuum pump |
| 08/16/1994 | CA2060587C Axially floating scroll member assembly |
| 08/09/1994 | US5336068 Scroll-type fluid machine having the eccentric shaft inserted into the moving scroll |
| 08/09/1994 | US5336060 Integrally formed counterweight for rotor end ring |
| 08/09/1994 | US5336059 Rotary heat driven compressor |
| 08/03/1994 | EP0569455B1 Dry-running twin-shaft vacuum pump |
| 07/27/1994 | EP0608116A1 Multiple compressor in a single shell |
| 07/26/1994 | CA1330976C Rotary compressor gas routing for muffler system |
| 07/21/1994 | DE3744760C2 Compacting machine compressing fluid e.g. refrigeration compressor |
| 07/19/1994 | US5330463 Scroll type fluid machinery with reduced pressure biasing the stationary scroll |
| 07/12/1994 | US5328344 Enclosed type rotary compressor |
| 07/12/1994 | US5328340 Scroll type compressor, having welded end shells and shaft subframe |
| 07/12/1994 | US5327745 Malone-Brayton cycle engine/heat pump |
| 07/05/1994 | US5326233 Enclosed motor compressor of a two cylinder type |
| 06/30/1994 | DE4243793A1 Stage lubrication for multistage vacuum pumps |
| 06/21/1994 | US5322424 Two stage gas compressor |
| 06/21/1994 | CA1330262C Compressor mounting apparatus |
| 06/15/1994 | EP0601958A1 Sound abatement in rotary compressors |
| 06/14/1994 | US5320506 Oldham coupling for scroll compressor |
| 06/14/1994 | CA1330212C Axial and radial supply bores in a scroll compressor |
| 06/09/1994 | DE4242406A1 Performance improvement device for rotary compressor - has turbocompressor stage at inlet of suction side fixed to secondary rotor shaft and before which is controllable supply |
| 05/24/1994 | US5314320 Screw vacuum pump with a reduced starting load |
| 05/24/1994 | US5314318 Horizontal multi-cylinder rotary compressor |
| 05/18/1994 | EP0597730A1 Two stage vacuum pump |
| 05/18/1994 | CN1086938A Method for controlling of operation of compressor |
| 05/17/1994 | US5312235 Apparatus for reducing pressure pulsations |
| 05/17/1994 | US5312234 Scroll compressor formed of three sub-assemblies |
| 05/17/1994 | US5312229 Scroll type compressor having curved bearing surfaces |
| 05/11/1994 | WO1994010425A1 Scroll compressor drive having a brake |
| 05/10/1994 | US5310324 Scroll-type fluid machine with attaching means for the balance weight |
| 05/10/1994 | US5310034 Supporting hub for clutch and pump assembly |
| 05/05/1994 | DE4336713A1 Spiral compressor for vehicle air conditioning system - uses flanged screw and spring to control bush and weight on eccentric shaft |
| 05/03/1994 | CA1329183C Delivery pressure operated thrust control system for working contact surfaces in a scroll compressor |
| 04/28/1994 | WO1994009262A1 Spiral compressor |
| 04/27/1994 | EP0593747A1 Compressor assembly with staked shell. |
| 04/19/1994 | US5304047 Scroll compressor of two-stage compression type having an improved volumetric efficiency |
| 04/19/1994 | US5304045 Closed type motor-driven compressor, a scroll compressor and a scroll lap machining end mill |
| 04/14/1994 | WO1994008141A1 Method of operating a claw-type vacuum pump, and a claw-type vacuum pump suitable for carrying out the method |
| 04/14/1994 | DE4234055A1 Spiralenkompressor Scroll compressor |
| 04/12/1994 | US5302089 Fluid rotating apparatus |
| 04/07/1994 | DE4233142A1 Verfahren zum Betrieb einer Klauenvakuumpumpe und für die Durchführung dieses Betriebsverfahrens geeignete Klauenvakuumpumpe Method of operating a claw-type vacuum pump and for the implementation of the operating method suitable claw-type vacuum pump |
| 03/31/1994 | DE4232119A1 Double shaft vacuum roots pump - has two rotors forming working and control pistons and housing having overflow valve in discharge aperture with excess pressure valves in side parts on pressure socket |
| 03/22/1994 | US5295813 Scroll-compressor having flat driving surfaces |
| 03/16/1994 | EP0587157A2 Package-type screw compressor |
| 03/09/1994 | EP0585911A1 Two stage primary dry pump |
| 03/02/1994 | EP0584748A2 Control apparatus for an induction motor |
| 02/23/1994 | EP0584036A1 Dynamically balanced co-orbiting scrolls |
| 02/22/1994 | US5287708 Car air conditioner with a hydraulically driven refrigerant compressor |
| 02/09/1994 | EP0582185A1 Multi-stage screw vacuum pump |
| 02/08/1994 | US5284426 Rotary compressor with multiple compressor stages and pumping capacity control |
| 01/25/1994 | US5281114 Dynamically balanced co-orbiting scrolls |
| 01/19/1994 | CN1080979A Rotary compressor with closing |
| 01/12/1994 | CN1080696A Sealed electric compressor with two cylinders and process for assembling of same |
| 12/22/1993 | EP0574442A1 Device for supplying a multi-stage dry-running vacuum pump with inert gas. |
| 12/15/1993 | EP0573516A1 Thermodynamic systems including gear type machines for compression or expansion of gases and vapors |
| 12/07/1993 | US5267844 Powered work producing apparatus |
| 11/24/1993 | EP0571315A1 Cooling of a hermetic motor-compressor unit |
| 11/24/1993 | CN2147375Y Planet piston type compressor |
| 11/24/1993 | CN1078792A Scroll compressor and air conditioner using the same |
| 11/24/1993 | CN1022853C Compressor |
| 11/23/1993 | US5263822 Scroll compressor with lubrication passages to the main bearing, revolving bearing, back-pressure chamber and compression chambers |
| 11/18/1993 | EP0570114A1 Control system for prime driver of compressor and method |
| 11/18/1993 | EP0569455A1 Dry-running twin-shaft vacuum pump. |
| 11/16/1993 | US5261800 Compressor, and method of manufacturing same including a press-fit inlet tube |
| 11/10/1993 | EP0569119A1 Rotary compressor |
| 11/09/1993 | US5259740 Rotary compressor |