| 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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| 08/17/1993 | US5236316 Scroll type compressor |
| 08/17/1993 | US5236313 Rotary-type vacuum pump |
| 08/11/1993 | CN1075192A Capacity control mechanism of vortex compressor |
| 08/03/1993 | US5231846 Method of compressor staging for multi-compressor multi-circuited refrigeration systems |
| 07/08/1993 | WO1993013317A1 Reverse phase and high discharge temperature protection in a scroll compressor |
| 07/08/1993 | WO1993013316A1 Scroll compressor |
| 07/06/1993 | US5224848 Scroll compressor with discharge valve opened by centrifugal force |
| 07/06/1993 | US5224836 Control system for prime driver of compressor and method |
| 06/30/1993 | CN1073751A Pressure ratio responsive unloader |
| 06/22/1993 | US5221199 Lubrication oil volume control device in a scroll type compressor |
| 06/15/1993 | US5219281 Fluid compressor with liquid separating baffle overlying the inlet port |
| 06/15/1993 | US5219041 Differential pressure sensor for screw compressors |
| 06/09/1993 | EP0545847A1 Pressure ratio responsive unloader |
| 06/08/1993 | CA1318896C Apparatus for providing vane backpressure in a sliding vane type of compressor |
| 05/25/1993 | US5213489 Scroll compressor with axial vibration prevention for a shaft bearing |
| 05/19/1993 | EP0541929A1 Gas pumping system with liquid elimination feature |
| 05/18/1993 | US5211031 Scroll type compressor and refrigeration cycle using the same |
| 05/18/1993 | US5211026 Combination lift piston/axial port unloader arrangement for a screw compresser |
| 05/13/1993 | WO1993010355A1 Multi-stage gas compressor provided with bypass valve device |
| 05/11/1993 | US5209653 Vacuum pump |
| 05/04/1993 | US5207568 Rotary screw compressor and method for providing thrust bearing force compensation |
| 04/29/1993 | WO1993008404A1 Inlet control combination for a compressor system |
| 04/21/1993 | EP0538179A1 High to low side bypass to prevent reverse rotation |
| 04/21/1993 | EP0537884A1 Scroll machine with reverse rotation protection |
| 04/21/1993 | EP0419531B1 Rotary positive displacement compressor and refrigeration plant |
| 04/20/1993 | US5203685 Piston unloader arrangement for screw compressors |
| 04/20/1993 | US5203683 Screw type pump |
| 04/20/1993 | US5203178 Noise control of air conditioner |
| 04/14/1993 | EP0537051A1 Installation for the pumping of gas with pumping speed regulation |
| 04/13/1993 | US5201648 Screw compressor mechanical oil shutoff arrangement |
| 04/13/1993 | US5201645 Compliant device for a scroll-type compressor |
| 04/07/1993 | EP0535533A1 Screw vacuum pump |
| 04/06/1993 | US5199855 Variable capacity compressor having a capacity control system using an electromagnetic valve |
| 04/06/1993 | US5199539 Fluid coupling having a vane pump system |
| 03/31/1993 | CN1070454A Scroll type compressor |
| 03/30/1993 | US5197868 Scroll-type machine having a lubricated drive bushing |
| 03/23/1993 | CA2031477C Method and apparatus for determining full load condition in a screw compressor |
| 03/16/1993 | US5193987 Scroll type compressor |
| 03/11/1993 | DE4129897A1 Control for interlinking of multistage vacuum pumps - has connection channel between pump stages with stroke valve, coupled to discharge valve |
| 03/09/1993 | US5192195 Scroll type compressor with separate control block |
| 03/04/1993 | WO1993004286A1 Capacity control for screw compressors |
| 03/02/1993 | CA1314031C Variable capacity compressor |
| 02/18/1993 | WO1993003281A1 Control unit for a liquid ring compressor |
| 02/16/1993 | US5186613 Reverse phase and high discharge temperature protection in a scroll compressor |
| 02/11/1993 | DE4126322A1 Steuerkoerper fuer einen fluessigkeitsringverdichter Steuerkoerper for a fluessigkeitsringverdichter |
| 02/02/1993 | US5183395 Compressor slide valve control |
| 01/26/1993 | US5181414 Pumping apparatus for pumping a gas by means of an oil-sealed vane pump and application to helium leak detectors |
| 01/05/1993 | US5176506 Vented compressor lubrication system |
| 12/29/1992 | US5174741 Liquid injecting type oil-free screw compressor |
| 12/24/1992 | DE4218205A1 Controlling start of screw compressor to be driven by three-phase motor - measuring pressure produced by rotary movement of screw compressor and stopping drive motor if pressure is in contrast compared to normal pressure |
| 12/23/1992 | EP0519880A1 Inlet shut-off valve for rotary piston vacuum pump |
| 12/23/1992 | EP0519580A2 Rotary compressor |
| 12/22/1992 | USRE34148 Scroll type compressor with variable displacement mechanism |
| 12/22/1992 | US5173041 Multistage vacuum pump with interstage solid material collector and cooling coils |
| 12/22/1992 | CA1311729C Scroll machine with plural pressurized seal enhancing chambers and static vane mounts |
| 12/15/1992 | US5170636 Heat exchanger |
| 12/10/1992 | DE4118644A1 Oil lubricated air compressor control - has flap-type valve in suction region and is actuated by adjustable bowden cable to control delivery |
| 12/08/1992 | US5169294 Pressure ratio responsive unloader |
| 12/01/1992 | US5167494 Scroll type compressor with axially supported movable scroll |
| 12/01/1992 | US5167491 High to low side bypass to prevent reverse rotation |
| 11/26/1992 | WO1992020924A1 A rotary displacement compressor and a method for regulating a rotary displacement compressor |
| 11/19/1992 | EP0513827A1 Scroll type fluid displacement apparatus having a capacity control mechanism |
| 11/05/1992 | DE4114618A1 Internal vol. ratio variation device for screw compressor - selects optimal ratio before measuring displacement of control slider and suppresses valve operation commands from power regulator |
| 11/03/1992 | CA1309698C Variable capacity compressor |
| 10/20/1992 | US5156539 Scroll machine with floating seal |
| 10/06/1992 | US5152681 Reversible vane pump with two piece rotor assembly |
| 10/06/1992 | US5152156 Rotary compressor having a plurality of cylinder chambers partitioned by intermediate partition plate |
| 09/16/1992 | EP0503629A1 Scroll type compressor with variable displacement mechanism |
| 09/16/1992 | CA2063148A1 Scroll type compressor with variable displacement mechanism |
| 09/08/1992 | US5145327 Variable capacity vane compressor having an improved bearing for a capacity control element |
| 08/25/1992 | US5141420 Scroll compressor discharge valve |
| 08/25/1992 | US5141407 Scroll machine with overheating protection |
| 08/25/1992 | US5140828 Refrigeration cycle apparatus |
| 08/04/1992 | US5135374 Oil flooded screw compressor with thrust compensation control |
| 07/21/1992 | US5131825 Multi-stage vacuum pump with reaction chamber between stages |
| 07/14/1992 | US5129791 Variable capacity vane compressor controllable by an external control signal |
| 07/09/1992 | WO1992011458A1 A suspension pump with built-in vacuum pump |
| 07/07/1992 | US5127386 Apparatus for controlling a supercharger |
| 07/01/1992 | EP0492759A2 Non-orbiting scroll mounting arrangements for a scroll machine |
| 06/30/1992 | US5125804 Variable-delivery vane-type rotary compressor |
| 06/30/1992 | CA1304300C Method for controlling an oil-lubricated vacuum pump |
| 06/23/1992 | US5123822 Screw compressor with spacer to prevent movement of volume adjusting valve |
| 06/11/1992 | DE4133750A1 Compartmentalised bulk tanker vehicle |
| 06/03/1992 | EP0488043A1 Capacity volume ratio control for twin screw compressors |
| 06/03/1992 | CN1061647A Scroll type compressor |
| 06/02/1992 | US5118260 Scroll compressor protector |
| 05/27/1992 | CN1061465A Scroll-type compressor |
| 05/26/1992 | US5115788 Supercharging apparatus for internal combustion engine |
| 05/26/1992 | US5115671 Method and apparatus for analyzing rotating machines |
| 05/20/1992 | EP0486122A1 Scroll type compressor |
| 05/20/1992 | EP0486121A1 Scroll type compressor |
| 05/20/1992 | EP0486120A1 Scroll type compressor |
| 05/19/1992 | US5114322 Scroll-type machine having an inlet port baffle |
| 05/19/1992 | US5114315 Clutch control system for an air compressor |
| 05/14/1992 | WO1992008053A1 Silencer unit |
| 05/14/1992 | DE4035463A1 Dual-flow compressor for vehicle air-conditioning - incorporates induction or Hall effect sensor giving warning when vane is lifted from wall of stator |
| 05/13/1992 | EP0484885A2 Screw type pump |
| 05/05/1992 | US5109700 Method and apparatus for analyzing rotating machines |
| 04/29/1992 | EP0482592A1 Compressor capacity control method and apparatus therefor |
| 04/29/1992 | CN1060699A Scroll machine with floating seal |