| Patents for F04C 29 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups (16,981) |
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| 09/12/1989 | CA1259170A1 Method and apparatus for the assembly of rotary compressors particularly for motor compressor units for refrigerators and the like |
| 09/06/1989 | EP0331449A2 Scroll type compressor |
| 08/30/1989 | EP0330555A1 Air compression arrangement with an oilless rotary compressor, and relative process |
| 08/30/1989 | EP0329919A1 Device for the removal of oil from a current of pressurized gas |
| 08/29/1989 | US4861372 Roller in rotary compressor and method for producing the same |
| 08/29/1989 | US4861246 Injected compressor with liquid switch |
| 08/22/1989 | US4859158 High ratio recirculating gas compressor |
| 08/15/1989 | CA1258446A1 Differential pressure lubrication system for rolling piston compressor |
| 08/08/1989 | US4854831 Scroll compressor with plural discharge flow paths |
| 08/02/1989 | CN1034408A Motor compressor lubrication |
| 07/27/1989 | DE3819623A1 Vane-cell pump |
| 07/26/1989 | EP0247061B1 Screw compressor means for lubrication of a rotor bearing |
| 07/25/1989 | US4850830 Lateral rotary compressor having valveless lubricating oil pump mechanism |
| 07/25/1989 | US4850819 Motor compressor bearing assembly |
| 07/25/1989 | US4850808 Liquid ring pump having port member with internal passageways for handling carry-over gas |
| 07/19/1989 | EP0323979A1 Rotary machine |
| 07/11/1989 | US4846642 Rotary piston blower with foamed synthetic material surfaces running along roughened metal surfaces |
| 07/11/1989 | US4846640 Scroll-type vacuum apparatus with rotating scrolls and discharge valve |
| 07/05/1989 | EP0322804A1 Air conditioner equipped with scroll type compressor |
| 07/05/1989 | EP0322531A2 Rotary compressor gas routing for muffler system |
| 07/05/1989 | CN1004721B Two-cylinder type rotary compressor |
| 07/04/1989 | US4844702 Lubrication circuit of rotary vacuum pumps |
| 06/29/1989 | WO1989005918A1 Valve arrangement for pump or compressor |
| 06/29/1989 | DE3841329A1 Vane vacuum pump |
| 06/27/1989 | US4842499 Scroll-type positive displacement apparatus with oil supply to compression chamber |
| 06/27/1989 | US4842490 Variable displacement vane compressor |
| 06/21/1989 | EP0320956A2 Screw type vacuum pump |
| 06/21/1989 | EP0320795A2 Vane-type vacuum pump |
| 06/20/1989 | US4840545 Scroll compressor relief valve |
| 06/13/1989 | US4838773 Scroll compressor with balance weight movably attached to swing link |
| 06/08/1989 | DE3836101A1 Device for adjusting the inner volume ratio of an oil-flooded power-regulated screw-type compressor |
| 06/08/1989 | DE3740365A1 Vane-cell air compressor |
| 06/01/1989 | WO1989004924A1 High ratio recirculating gas compressor |
| 05/31/1989 | EP0317900A2 Scroll type compressor |
| 05/31/1989 | CN1033223A Rotor balancing |
| 05/30/1989 | US4834634 Sliding-vane rotary compressor for bearing lubrication |
| 05/24/1989 | EP0317215A2 Motor compressor lubrication |
| 05/24/1989 | EP0317056A1 Rotor balancing |
| 05/23/1989 | US4831828 Cryogenic refrigerator having a convection system to cool a hermetic compressor |
| 05/16/1989 | US4830590 Sliding-vane rotary compressor |
| 05/16/1989 | US4830582 Rotary type compressing apparatus employing exhaust gas control valve |
| 05/10/1989 | EP0314819A1 Two-shaft vacuum pump with at least one connecting passage between the bearing spaces |
| 05/10/1989 | CN1032842A Compressor for fluids |
| 05/09/1989 | US4828467 Supercharger and rotor and shaft arrangement therefor |
| 05/09/1989 | US4828466 Oil feeding means incorporated in a horizontal type rotary compressor |
| 05/09/1989 | US4828463 Rotary compressor with clutch and bypass control actuated by hydraulic fluid |
| 05/03/1989 | EP0314133A2 Oil cooled fluid compression apparatus |
| 05/02/1989 | US4826412 Mechanically driven screw supercharger |
| 05/02/1989 | US4826409 Closed type rotary compressor with rotating member to prevent back pressure on discharge valve |
| 05/02/1989 | US4826407 Rotary vane pump with ballast port |
| 04/25/1989 | US4824346 Scroll type fluid displacement apparatus with balanced drive means |
| 04/25/1989 | US4824344 Scroll-type compressor with oil passageway in thrust bearing |
| 04/18/1989 | US4822263 Sliding-vane rotary compressor |
| 04/11/1989 | US4820130 Temperature sensitive solenoid valve in a scroll compressor |
| 04/06/1989 | WO1989002985A1 Rotary piston compressor |
| 04/05/1989 | CN1032224A Lubrication system for compressor |
| 04/04/1989 | US4818198 Scroll fluid machine with oil feed passages |
| 04/04/1989 | US4818195 Scroll compressor with valved port for each compression chamber |
| 04/04/1989 | US4818189 Variable capacity vane compressor |
| 04/04/1989 | CA1252074A1 Quiet running compressor |
| 03/29/1989 | CN1032062A Lubrication device for compressor |
| 03/28/1989 | US4815951 Scroll compressor with super-charging tube |
| 03/28/1989 | US4815945 Variable capacity vane compressor |
| 03/23/1989 | DE3829274A1 Lubricating device |
| 03/22/1989 | EP0308119A2 Hermetic scroll type compressor |
| 03/21/1989 | US4813857 Roots blower |
| 03/21/1989 | US4813854 Variable capacity vane compressor |
| 03/16/1989 | DE3729319A1 Spiral compressor |
| 03/14/1989 | US4812110 Oil-free screw compressor with bypass of cooled discharged gas |
| 03/14/1989 | US4811471 Method of assembling scroll compressors |
| 03/08/1989 | EP0306405A1 Methods and devices for cooling a motor of a refrigerating machine with liquid and economiser gaz |
| 03/08/1989 | EP0235150B1 Vane cell pump |
| 02/28/1989 | US4808095 Screw vacuum pump |
| 02/28/1989 | US4808094 Drive system for the orbiting scroll of a scroll type fluid compressor |
| 02/23/1989 | DE3826326A1 Vane vacuum pump |
| 02/23/1989 | DE3726684A1 Roots vacuum pump |
| 02/23/1989 | DE3726683A1 Roots vacuum pump |
| 02/16/1989 | DE3725806A1 Rotary piston compressor system - has housing with circular interior, and eccentrically located piston |
| 02/08/1989 | EP0302677A1 Gas compressors |
| 02/08/1989 | CN1030967A Fluid compressor |
| 02/07/1989 | US4802827 Compressor |
| 02/01/1989 | EP0301312A2 Variable capacity vane compressor |
| 02/01/1989 | EP0301273A2 Fluid compressor |
| 01/31/1989 | US4801251 Sliding-vane rotary compressor |
| 01/25/1989 | EP0300884A1 Hermetic or semi-hermetic refrigeration motor compressor unit |
| 01/24/1989 | US4799869 Pneumatic vane pumps with oil separation |
| 01/24/1989 | US4799865 Intermittent service screw compressor |
| 01/18/1989 | EP0248839B1 Intermittent service screw compressor |
| 01/10/1989 | US4797078 Bearing arrangement of an external-axial rotary piston blower |
| 01/10/1989 | US4797071 Motor and vane-pump assembly free from external oil leaks |
| 01/03/1989 | US4795325 Compressor of rotary vane type |
| 01/03/1989 | US4795322 Scroll compressor with oil thrust force on orbiting scroll |
| 01/03/1989 | US4795321 Method of lubricating a scroll compressor |
| 12/28/1988 | CN88103729A Compressor with radial bearing for supporting drive shaft |
| 12/27/1988 | US4793779 Rotating piston compressor having an axially adjustable rotary sleeve valve |
| 12/21/1988 | EP0295664A2 Compressor |
| 12/20/1988 | US4792296 Scroll compressor with pressure-equalizing passage and gas vent conduit in main shaft |
| 12/20/1988 | US4792288 Encapsulated compressor |
| 12/15/1988 | DE3718576A1 Vane pump |
| 12/14/1988 | CN87103739A Dry-type vacuum pump |