| 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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| 03/07/2001 | CN1286358A Protection of swirl temp. |
| 03/06/2001 | US6196814 Positive displacement pump rotatable in opposite directions |
| 03/06/2001 | US6196810 Multistage vacuum pump assembly |
| 02/28/2001 | EP1079111A2 Scroll temperature protection |
| 02/20/2001 | US6190138 Flow valve for correcting reverse rotation in scroll compressor |
| 02/08/2001 | DE19935041A1 Schraubenverdichter Screw compressor |
| 02/06/2001 | US6183231 Clean-in-place gear pump |
| 02/06/2001 | US6183218 Multishaft electric motor and positive-displacement pump combined with such multishaft electric motor |
| 02/06/2001 | CA2212942C Gas actuated slide valve in a screw compressor |
| 01/31/2001 | EP1072796A2 Screw-type compressor |
| 01/31/2001 | EP0828941B1 Variable-displacement screw-type compressor |
| 01/30/2001 | US6179592 Reverse rotation flank separator for a scroll compressor |
| 01/24/2001 | EP1070848A1 Positive displacement machine for compressible fluids |
| 01/23/2001 | US6176686 Scroll machine with capacity modulation |
| 01/23/2001 | US6176685 Scroll compressor in which communication is controlled between adjacent compression spaces |
| 01/17/2001 | EP1068454A1 Screw rotor compressor having a movable wall portion |
| 01/16/2001 | US6174148 Water jet type air compressor system, its starting method, and water quality control method thereof |
| 01/16/2001 | US6174137 Compressor having load control |
| 01/09/2001 | US6171086 Scroll compressor with pressure equalization groove |
| 01/09/2001 | US6171064 Reverse rotation detection for scroll compressor utilizing suction temperature |
| 01/02/2001 | US6168402 Scroll-type compressor having power transmission mechanism allowing idling |
| 01/02/2001 | US6168385 Rotary device with means for monitoring and adjusting the clearance between the rotors |
| 12/26/2000 | US6164940 Scroll type compressor in which a soft starting mechanism is improved with a simple structure |
| 12/21/2000 | DE19927531A1 Rotary pump for use in e.g. a printing press has two meshing four-lobed rotors which do not contact the inner surface of the rotor chamber |
| 12/20/2000 | EP1060335A1 Scroll compressor with combined pressure ratio and pressure differential relief valve |
| 12/07/2000 | WO2000073660A1 Rotary compressor or vacuum pump |
| 12/07/2000 | WO2000073659A1 Apparatus for preventing vacuum compression of scroll compressor |
| 11/30/2000 | DE19924645A1 Drehschieberverdichter oder -vakuumpumpe Rotary vane compressor or -vakuumpumpe |
| 11/28/2000 | US6152700 Hermetic compressor with remote temperature sensing means |
| 11/23/2000 | DE10014483A1 Motor drive control apparatus for auxiliary machines in air-conditioner for vehicles, sets target speed of common drive motor equal to higher speed among compressor and heat pump |
| 11/21/2000 | US6149401 Variable discharge-amount compressor for refrigerant cycle |
| 11/21/2000 | CA2032417C Scroll compressor with discharge valves |
| 11/14/2000 | US6146118 Oldham coupling for a scroll compressor |
| 11/14/2000 | US6146100 Compressor unit and control device used thereby |
| 11/08/2000 | CN1272906A Multi-stage capacity control scroll compressor |
| 11/07/2000 | US6142753 Scroll compressor with economizer fluid passage defined adjacent end face of fixed scroll |
| 11/07/2000 | US6142741 Hermetic electric compressor with improved temperature responsive motor control |
| 11/01/2000 | CN1272171A Adaptive control for refrigeration system using pulse width modulated duty cycle scroll compressor |
| 10/31/2000 | US6139295 Bearing lubrication system for a scroll compressor |
| 10/31/2000 | US6139294 Stepped annular intermediate pressure chamber for axial compliance in a scroll compressor |
| 10/31/2000 | US6139287 Scroll type fluid machine |
| 10/31/2000 | US6139280 Electric switch gauge for screw compressors |
| 10/25/2000 | EP1046818A2 Capacity controller of a compressor with variable capacity |
| 10/24/2000 | US6135744 Piston unloader arrangement for screw compressors |
| 10/24/2000 | US6135738 Scroll compressor having a discharge port in the moveable scroll |
| 10/24/2000 | US6135720 Air compressors of sliding vane eccentric rotor type |
| 10/19/2000 | DE19916983A1 Screw compressor with variable RPM governing has slide with radially disposed outlet port, and by axial extent in all positions overlaps rotors with exception of radially disposed outlet port |
| 10/17/2000 | US6132179 Scroll type compressor enabling a soft start with a simple structure |
| 10/11/2000 | CN1269871A Oil flow protection scheme |
| 10/04/2000 | EP1041286A2 Scroll compressor with reverse rotation prevention |
| 10/04/2000 | CN1268651A Heat pump having noise proof function |
| 10/03/2000 | US6126425 Positive displacement pump |
| 09/28/2000 | WO2000057061A1 A rotary piston compressor |
| 09/27/2000 | CN1267792A Rolling rotor type compressor |
| 09/26/2000 | US6123517 Scroll machine with capacity modulation |
| 09/26/2000 | US6123516 Vacuum pump |
| 09/20/2000 | CN1266975A Refrigerating device |
| 09/19/2000 | US6120255 Scroll machine with capacity modulation |
| 09/19/2000 | US6119473 Refrigeration-cycle apparatus for vehicle use |
| 09/14/2000 | WO2000053931A1 Rotary helical screw-type compressor |
| 09/14/2000 | DE19916768A1 Vorrichtung und Verfahren zur Regelung eines Kompressors durch Drosselung des Ansaugvolumenstroms Apparatus and method for control of a compressor by throttling the intake volume flow |
| 09/14/2000 | DE10009673A1 Spiral compressor for air conditioner system in motor vehicles has housing with fixed and rotating spiral parts defining compressor pocket |
| 09/13/2000 | EP1034951A2 Idling engine speed control apparatus |
| 09/12/2000 | US6116867 Scroll machine with capacity modulation |
| 09/12/2000 | US6116860 Scroll compressor |
| 09/12/2000 | US6116046 Refrigeration chiller with assured start-up lubricant supply |
| 09/08/2000 | WO2000052337A1 Device and method for regulating a compressor by throttling the suction volumetric flow |
| 09/05/2000 | US6113358 Scroll compressors |
| 08/30/2000 | CN1055988C 涡旋式机械 Scroll machine |
| 08/22/2000 | US6106251 Scroll machine with reverse rotation sound attenuation |
| 08/22/2000 | US6106241 Single screw compressor with liquid lock preventing slide |
| 08/22/2000 | US6105378 Variable capacity vapor compression cooling system |
| 08/15/2000 | US6102671 Scroll compressor |
| 08/09/2000 | EP1025403A1 An adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor |
| 08/02/2000 | CN1261946A Single-source gas actuation for screw compressor slide valve assembly |
| 08/01/2000 | US6095765 Combined pressure ratio and pressure differential relief valve |
| 08/01/2000 | US6095764 Reverse rotation protection for a scroll compressor using a valve means |
| 07/27/2000 | DE19901721A1 Discharge pressure control procedure for screw compressor used to compress fuel gas supplied to gas turbine |
| 07/26/2000 | EP1021702A1 Multi-lobe pump for particle counters |
| 07/26/2000 | EP1021654A1 Screw vacuum pump provided with rotors |
| 07/25/2000 | CA2132172C Control valve for variable capacity vane compressor |
| 07/20/2000 | DE10000755A1 Slider vacuum pump for vehicle power brake systems has pressure reducing device in displacement chamber to prevent pressure rise and resulting break of slider when rotary shaft rotates in direction opposite from normal |
| 07/18/2000 | US6089830 Multi-stage compressor with continuous capacity control |
| 07/18/2000 | US6088916 Method of making a pump having relief valve seat free of direct structural restraint |
| 07/11/2000 | US6086347 Two-stage rotary vane motor |
| 07/11/2000 | US6086335 Capacity modulated scroll machine having one or more pin members movably disposed for restricting the radius of the orbiting scroll member |
| 07/11/2000 | US6085530 Discharge temperature sensor for sealed compressor |
| 07/05/2000 | CN1259198A Start-up method and apparatus in refrigeration chillers |
| 07/04/2000 | US6082985 Screw compressor |
| 07/04/2000 | US6082972 Oil level sight glass for a compressor |
| 07/04/2000 | US6082971 Compressor control system and method |
| 06/28/2000 | EP1014427A2 Processing apparatus having integrated pumping system |
| 06/27/2000 | US6079952 Continuous capacity control for a multi-stage compressor |
| 06/21/2000 | EP1009934A1 Oil flow protection scheme |
| 06/20/2000 | US6077051 System and methods for controlling rotary screw compressors |
| 06/20/2000 | US6077045 Scroll-type compressor and operation method therefor |
| 06/15/2000 | DE19857453A1 Device for monitoring temperatures in vacuum pump rotors includes a heatable temperature sensor fitted at a point in the vacuum pump to allow its setting to compare its Knudsen flow with that around the rotor. |
| 06/14/2000 | EP0775262B1 Regulating device for a screw rotor machine intended for supercharging internal combustion engines |
| 06/13/2000 | US6073457 Method for operating an air conditioner in a motor vehicle, and an air conditioner having a refrigerant circuit |
| 06/07/2000 | EP0993554A4 Improvements to impeller pumps |