| 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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| 12/13/1988 | US4791329 Motor protector mounting structure for enclosed electric compressors |
| 12/13/1988 | US4790733 Rotary cylinder configuration and method to control slot dimensions during direct weld attachment to the shell |
| 12/13/1988 | CA1246509A1 Main bearing for a rotary compressor |
| 12/13/1988 | CA1246508A1 Suction tube seal for a rotary compressor |
| 12/06/1988 | US4789317 Rotary vane oil pump and method of operating |
| 12/06/1988 | US4789314 Multi-section roots vacuum pump of reverse flow cooling type with internal flow division arrangement |
| 11/17/1988 | EP0290664A1 Two-shaft pump |
| 11/17/1988 | EP0290663A1 Single or multistage two-shaft vacuum pump |
| 11/17/1988 | EP0290662A1 Positive-displacement two-shaft vacuum pump |
| 11/15/1988 | US4784583 Reciprocating hermetic motor compressor with a thermetically insulatable non-rotatable muffler |
| 11/01/1988 | US4781545 Rotary compressor with sound suppression tubular cavity section |
| 11/01/1988 | US4781541 External axial rotary piston blower with noise suppressing transfer ports |
| 10/27/1988 | DE3744723A1 Water-ring pump |
| 10/26/1988 | EP0287797A2 Two-shaft vacuum pump with a synchronized transmission |
| 10/26/1988 | EP0287685A1 Two-shaft vacuum pump with a synchronizing transmission |
| 10/25/1988 | US4780061 Screw compressor with integral oil cooling |
| 10/20/1988 | DE3810052A1 Cooling arrangement |
| 10/20/1988 | DE3805346A1 Vane-cell pump |
| 10/18/1988 | US4778352 Variable capacity vane compressor |
| 10/11/1988 | US4776778 Refrigerant compressor with shaft bearing having improved wear resistance |
| 10/11/1988 | US4776074 Rotary slide vane compressor |
| 10/06/1988 | DE3710248A1 Air suction intake for flanging onto a compressor |
| 10/06/1988 | DE3709493A1 Rotating-piston compressor |
| 10/05/1988 | EP0285100A2 Rotor assembly |
| 10/05/1988 | EP0284713A2 Valve assembly |
| 10/05/1988 | EP0284712A2 Vane pump |
| 10/04/1988 | US4775304 Centrifugal scavenging system for single screw compressors |
| 09/28/1988 | EP0283867A2 Rolling vane compressor |
| 09/28/1988 | CN88101361A 涡旋式压缩机 Scroll compressor |
| 09/27/1988 | US4773229 Method for refrigeration systems |
| 09/21/1988 | CN88100326A 密封型旋转式压缩机 Sealed rotary compressor |
| 09/20/1988 | US4772188 Scroll compressor with oil grooves in thrust bearing |
| 09/20/1988 | US4772185 Rotary vane pump having a plurality of inlet and outlet slots in a rotating sleeve |
| 09/14/1988 | EP0281654A1 Two-shaft machine |
| 09/14/1988 | CN85103401B Improved lubrication for rotary compressor vane |
| 09/13/1988 | US4770615 Screw compressor with scavenging port |
| 09/08/1988 | DE3706583A1 Distribution of the lubricant and coolant in rotary-screw compressors |
| 09/06/1988 | US4768936 Scroll compressor with oil pickup tube in oil sump |
| 09/06/1988 | US4768934 Port arrangement for rotary positive displacement blower |
| 09/01/1988 | DE3705849A1 Refrigerating plant |
| 08/30/1988 | US4767293 Scroll-type machine with axially compliant mounting |
| 08/30/1988 | US4767284 Screw vacuum pump unit |
| 08/30/1988 | CA1241313A1 Variable liquid refrigerant injection port location for screw compressor equipped with automatic variable volume ratio |
| 08/25/1988 | WO1988006247A1 A rotary machine equipped with a thrust balancing arrangement |
| 08/25/1988 | WO1988006058A1 Air/oil separator |
| 08/25/1988 | DE3802923A1 Balancing device |
| 08/24/1988 | EP0279166A1 Rotary compressor |
| 08/18/1988 | DE3737949A1 Oil-superimposed discharge valve for rotating vacuum pumps |
| 08/18/1988 | DE3706588C1 Drive device for rotary displacement compressors |
| 08/18/1988 | DE3704254A1 Lubricating oil removal from gears of oil-flooded rotary piston compressors |
| 08/17/1988 | EP0278772A1 Air/oil separator |
| 08/16/1988 | US4764099 Compressor having discharge valve means adapted to enhance the coefficient of performance of the compressor |
| 08/16/1988 | US4764097 Two-cylinder type rotary compressor |
| 08/16/1988 | US4764096 Scroll compressor with clearance between scroll wraps |
| 08/11/1988 | DE3801306A1 Vane-cell compressor |
| 08/11/1988 | DE3702652A1 Flow governor for a liquid, in particular for a worm compressor with liquid injection |
| 08/10/1988 | EP0277924A2 Improvement to the lubrication circuit of rotary vacuum pumps |
| 08/10/1988 | EP0277583A2 Rotary air compressor |
| 08/10/1988 | EP0277582A2 Thermostatic valve and oil filter unit for compressors |
| 08/09/1988 | US4762477 Scroll compressor with control of lubricant flow |
| 08/09/1988 | US4762471 Rotary compressor for refrigerant |
| 08/09/1988 | US4762469 Rotor anti-reverse rotation arrangement in a screw compressor |
| 08/03/1988 | EP0276252A1 Screw rotor compressor. |
| 08/02/1988 | US4761166 Compressor system |
| 08/02/1988 | US4761123 Lubrication arrangement, in an air compressor |
| 07/28/1988 | DE3701447A1 Method for increasing the output of compressors and device for implementing the method |
| 07/26/1988 | US4759698 Rotary compressor with oil conveying means to shaft bearings |
| 07/26/1988 | US4759697 Rotary piston machine having crown wheel coupled to the crank |
| 07/26/1988 | US4759696 Scroll compressor with biased-open exhaust valve |
| 07/19/1988 | US4758138 Oil-free rotary gas compressor with injection of vaporizable liquid |
| 07/19/1988 | US4758136 Screw compressor lubrication channel for lubrication of a rotor bearing |
| 07/14/1988 | DE3730685A1 Pressure lubrication system for rotary-vane vacuum pumps |
| 07/05/1988 | US4755114 Sealed type scroll compressor with wire mesh oil separating member |
| 06/29/1988 | EP0272767A2 Multi-section roots vacuum pump of reverse flow cooling type with internal flow division arrangement |
| 06/28/1988 | US4753744 Use of perfluoropolyethers in mechanical pumps |
| 06/21/1988 | US4752195 Rotary vane type of pump with elongated damping chambers |
| 06/15/1988 | EP0270741A1 Compressor with improved exposed outboard thrust plate and method of assembly |
| 06/14/1988 | US4750864 Compressor lubrication and noise reduction system |
| 06/07/1988 | US4749344 Oil feeding device for scroll fluid apparatus |
| 06/07/1988 | US4748831 Refrigeration plant and rotary positive displacement machine |
| 06/01/1988 | EP0268970A1 Enclosed compressor |
| 05/31/1988 | US4747761 Silencer-carrying rotary vane pump |
| 05/24/1988 | US4746277 Rotary compressor with pressure pulse suppression |
| 05/18/1988 | EP0267559A1 Rotary piston blower |
| 05/17/1988 | US4744737 Electrically driven compressor with a peripheral housing weld |
| 05/10/1988 | US4743184 Rotary compressor with heating passage between discharge chamber and shaft seal |
| 05/10/1988 | US4743183 Rotary vane compressor with discharge fluid to front and rear shaft bearings and vane slats |
| 05/10/1988 | US4743182 Rotating piston compressor with thin-walled radially-resilient piston |
| 05/10/1988 | US4743181 For an air conditioning machine |
| 05/10/1988 | US4743177 Enclosed type compressor and method for assembling the same |
| 05/04/1988 | EP0265774A2 Sliding-vane rotary compressor |
| 05/03/1988 | US4741177 Oil separator in a coolant system |
| 04/28/1988 | DE3734573A1 Vane pump |
| 04/27/1988 | EP0264749A2 Sliding vane vacuum pump |
| 04/27/1988 | CN87106599A Sealed compressor with horizontal crankshaft |
| 04/26/1988 | US4739632 Liquid injection cooling arrangement for a rotary compressor |
| 04/20/1988 | EP0264005A2 Sliding-vane rotary compressor |
| 04/13/1988 | EP0263576A2 Compressor with discharge valve |
| 04/12/1988 | US4737088 Rotary compressor with oil relief passage |
| 04/12/1988 | US4737082 Lift valve for rotary screw compressors |