| Patents for F04C 28 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids (4,928) |
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| 06/20/1989 | US4840545 Scroll compressor relief valve |
| 06/13/1989 | US4838740 Variable displacement vane compressor |
| 06/08/1989 | DE3836101A1 Device for adjusting the inner volume ratio of an oil-flooded power-regulated screw-type compressor |
| 05/16/1989 | US4830582 Rotary type compressing apparatus employing exhaust gas control valve |
| 05/03/1989 | EP0314133A2 Oil cooled fluid compression apparatus |
| 05/02/1989 | US4826409 Closed type rotary compressor with rotating member to prevent back pressure on discharge valve |
| 05/02/1989 | US4826134 Intake valve for air compressors and the like |
| 04/25/1989 | US4824330 Use with automobile air conditioning systems |
| 04/25/1989 | US4823758 Mechanical supercharger |
| 04/20/1989 | WO1989003482A1 Rotary displacement compressor |
| 04/18/1989 | US4822263 Sliding-vane rotary compressor |
| 04/18/1989 | US4822251 Vacuum pump having an rpm-measuring device |
| 04/11/1989 | US4820130 Temperature sensitive solenoid valve in a scroll compressor |
| 04/11/1989 | US4819440 Sliding-vane rotary compressor with displacememt-adjusting mechanism, and controller for such variable displacement compressor |
| 04/04/1989 | US4818195 Scroll compressor with valved port for each compression chamber |
| 04/04/1989 | US4818189 Variable capacity vane compressor |
| 03/28/1989 | US4815951 Scroll compressor with super-charging tube |
| 03/28/1989 | US4815950 Multi-stage compressor capacity control apparatus |
| 03/28/1989 | US4815945 Variable capacity vane compressor |
| 03/28/1989 | US4815944 Variable capacity compressor |
| 03/21/1989 | US4813854 Variable capacity vane compressor |
| 02/28/1989 | US4808095 Screw vacuum pump |
| 02/28/1989 | US4808083 Variable capacity type vane compressor |
| 02/07/1989 | CA1249731A1 Constant evaporator pressure slide valve for screw compressor refrigeration system |
| 02/01/1989 | EP0301312A2 Variable capacity vane compressor |
| 01/31/1989 | US4801251 Sliding-vane rotary compressor |
| 01/24/1989 | US4799865 Intermittent service screw compressor |
| 01/18/1989 | EP0248839B1 Intermittent service screw compressor |
| 01/04/1989 | EP0297840A2 Scroll type compressor with variable displacement mechanism |
| 12/27/1988 | US4793779 Rotating piston compressor having an axially adjustable rotary sleeve valve |
| 12/15/1988 | DE3718576A1 Vane pump |
| 12/08/1988 | DE3717421A1 Adjusting device for power-regulated or -controlled rotary-piston engines and machines |
| 12/08/1988 | DE3715745A1 Wing pump or swivel wing pump |
| 11/15/1988 | CA1244914A1 Control for liquid ring vacuum pumps |
| 11/02/1988 | EP0288738A1 Supercharger device for internal combustion engines, particularly for motor vehicles |
| 11/01/1988 | US4781551 Rotary compressor with low-pressure and high-pressure gas cut-off valves |
| 10/27/1988 | DE3711519A1 Regulatable sliding vane compressor with openings to exhaust medium - with rotor eccentrically arranged in bore of fixed housing and cylindrical housing part having guide edge rotatable about axis |
| 10/25/1988 | US4780067 Multicylinder rotary compressor |
| 10/18/1988 | US4778352 Variable capacity vane compressor |
| 10/13/1988 | DE3710261A1 Method of operating a compressor |
| 10/13/1988 | DE3708200A1 Rotary-screw compressor with overflow control |
| 10/11/1988 | US4776770 Variable capacity vane compressor |
| 10/05/1988 | EP0285100A2 Rotor assembly |
| 10/05/1988 | EP0284713A2 Valve assembly |
| 10/05/1988 | EP0284712A2 Vane pump |
| 10/04/1988 | US4774816 Air conditioner or refrigerating plant incorporating scroll compressor |
| 09/21/1988 | EP0283283A2 Scroll type compressor with displacement adjusting mechanism |
| 09/21/1988 | CN88100326A 密封型旋转式压缩机 Sealed rotary compressor |
| 09/13/1988 | US4770609 Two-stage vacuum pump apparatus and method of operating the same |
| 09/08/1988 | DE3706582A1 Controllable rotary-screw compressor for industrial compressed gas |
| 09/07/1988 | EP0280892A2 Vaccum pump with a device for counting the revolutions |
| 08/30/1988 | US4767293 Scroll-type machine with axially compliant mounting |
| 08/16/1988 | US4763636 For compressing precombustion intake mixture of an internal combustion engine |
| 08/16/1988 | CA1240523A1 Compressor inlet control device |
| 08/11/1988 | DE3801306A1 Vane-cell compressor |
| 08/10/1988 | EP0277938A2 Compressor unit with a screw compressor |
| 08/10/1988 | EP0277924A2 Improvement to the lubrication circuit of rotary vacuum pumps |
| 08/09/1988 | US4762469 Rotor anti-reverse rotation arrangement in a screw compressor |
| 08/03/1988 | EP0276252A1 Screw rotor compressor. |
| 07/27/1988 | EP0275850A2 Rotary compressor |
| 07/19/1988 | US4757888 Electro magnetic clutch with a rotation detector for a refrigerant compressor |
| 06/07/1988 | US4748831 Refrigeration plant and rotary positive displacement machine |
| 06/01/1988 | DE3639512A1 Vacuum pump system with a Roots pump |
| 05/31/1988 | US4747756 Scroll compressor with control device for variable displacement mechanism |
| 05/31/1988 | US4747755 Capacity control device for a screw compressor |
| 05/24/1988 | US4746277 Rotary compressor with pressure pulse suppression |
| 05/17/1988 | US4744734 Means for controlling air discharge, in an air compressor |
| 05/17/1988 | US4744733 Scroll type compressor with variable displacement mechanism |
| 05/17/1988 | US4744732 Variable capacity vane compressor |
| 05/17/1988 | US4744731 Variable capacity vane compressor |
| 05/11/1988 | DE3706825C1 Quantity-controlled internal combustion engine with a machine arranged in the intake duct |
| 05/10/1988 | US4743182 Rotating piston compressor with thin-walled radially-resilient piston |
| 05/10/1988 | US4743170 Slide valve position indicator and magnetic coupler |
| 05/04/1988 | EP0265774A2 Sliding-vane rotary compressor |
| 04/27/1988 | EP0264949A2 Variable capacity compressor |
| 04/21/1988 | DE3634512C1 Controllable rotary screw compressor |
| 04/20/1988 | EP0264005A2 Sliding-vane rotary compressor |
| 04/12/1988 | US4737082 Lift valve for rotary screw compressors |
| 04/12/1988 | US4737081 Variable capacity vane compressor |
| 04/07/1988 | WO1988002438A1 Rotary machine |
| 04/05/1988 | US4736143 Torque control apparatus for rotary machine |
| 03/30/1988 | EP0261507A1 Sliding-vane rotary compressor with displacement-adjusting mechanism, and controller for such variable displacement compressor |
| 03/16/1988 | EP0259333A1 Refrigeration plant and rotary positive displacement machine. |
| 03/08/1988 | CA1233799A1 Integral slide valve-oil separator apparatus in a screw compressor |
| 03/01/1988 | US4727725 Gas injection system for screw compressor |
| 02/25/1988 | DE3727986A1 Compacting machine compressing fluid e.g. refrigeration compressor |
| 02/24/1988 | EP0256624A2 Variable capacity vane compressor |
| 02/23/1988 | US4726740 Rotary variable-delivery compressor |
| 02/23/1988 | US4726739 Multiple cylinder rotary compressor |
| 02/23/1988 | CA1233144A1 Controlled suction unloading in a scroll compressor |
| 02/17/1988 | EP0255920A2 Vane vacuum pump |
| 02/17/1988 | CN87105288A Rotary type compressor using exhaust regulating valve |
| 02/16/1988 | US4724680 Air conditioning apparatus and control method thereof |
| 02/09/1988 | US4723895 Method of and apparatus for effecting volume control of compressor |
| 01/20/1988 | EP0253063A2 Flow conditioning nutation valving apparatus and method of operation |
| 01/14/1988 | WO1988000294A1 Screw rotor compressor |
| 01/13/1988 | EP0252658A2 Variable capacity vane compressor |
| 01/07/1988 | EP0251019A2 Screw compressor |
| 01/07/1988 | EP0250665A1 A rotary compressor |
| 01/05/1988 | US4717314 Scroll compressor with control device for variable displacement mechanism |