| 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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| 11/13/2001 | US6315535 Screw vacuum pump having valve controlled cooling chambers |
| 11/06/2001 | CA2233850C Protecting device for car air conditioner |
| 10/25/2001 | DE10018204A1 Regulator for inner axis rotary piston engines has mechanical compression spring system automatically setting slider to ensure same pressure exists each side when work chamber opens to outlet channel |
| 10/24/2001 | CN1318723A Heat pump and method for controlling its operation |
| 10/23/2001 | US6305187 Air-conditioner, outdoor unit and refrigeration unit |
| 10/18/2001 | US20010029744 Heat pump and method for controlling operation thereof |
| 10/16/2001 | US6302668 Capacity regulating apparatus for compressors |
| 10/16/2001 | US6302654 Compressor with control and protection system |
| 10/16/2001 | CA2202771C Vibration monitoring system |
| 10/11/2001 | WO2001075307A1 High-pressure dome type compressor |
| 10/11/2001 | WO2001075273A2 Scroll compressor |
| 10/11/2001 | US20010028852 Capacity-controlled scroll-type compressor having internally-bypassing system |
| 10/11/2001 | CA2403305A1 Scroll compressor |
| 10/10/2001 | EP1143147A2 Control of multi stage electrically driven compressor |
| 10/10/2001 | CN1072776C Scroll-type compressor and operation method therefor |
| 10/04/2001 | EP1138949A2 Compressor with control and protection system |
| 09/27/2001 | DE10013510A1 Electrically driven vehicle air conditioning system has compressor driven directly without gearing by electronically commutated, permanently stimulated brushless synchronous motor |
| 09/26/2001 | CN1071853C Multi-cylinder rotary air compressor |
| 09/25/2001 | US6293776 Method of connecting an economizer tube |
| 09/25/2001 | US6293767 Scroll machine with asymmetrical bleed hole |
| 09/20/2001 | WO2001069085A1 Motor protector on non-orbiting scroll |
| 09/19/2001 | CN1071418C Scroll machine with reverse rotation protection |
| 09/19/2001 | CN1071416C Eddy compression engine |
| 09/18/2001 | CA2224747C Combination valve for screw compressors |
| 09/13/2001 | US20010021349 Oil free screw compressor |
| 09/12/2001 | EP1132621A1 Screw compressor and refrigerator |
| 09/11/2001 | US6287088 Oil free screw compressor |
| 09/05/2001 | EP1130265A2 Sealed compressor using hot oil to actuate protection switch |
| 09/05/2001 | CN1311397A Compressor with control and protection system |
| 08/29/2001 | EP1128067A1 Method for controlling a compressor installation and compressor installation controlled in this manner |
| 08/29/2001 | EP1127220A1 Lift valve for a rotary screw compressor |
| 08/29/2001 | CN1310301A Sealed compressor with hot oil-operated protection switch |
| 08/28/2001 | US6280146 Sealed compressor using hot oil to actuate protector switch |
| 08/22/2001 | CN1309279A Air conditioner, outdoor unit and refrigerating unit |
| 08/21/2001 | US6276911 Screw compressor |
| 08/16/2001 | WO2001059260A1 Fluid displacement pump with backpressure stop |
| 08/16/2001 | DE10003869A1 Verfahren zum Komprimieren von fluiden Fördermedien A method for compressing fluid fluids |
| 08/14/2001 | US6273691 Scroll gas compressor having asymmetric bypass holes |
| 08/09/2001 | US20010011500 Method of regulating a fluid treatment plant, fluid treatment plant and application of such a plant to the production of a constituent of air |
| 08/08/2001 | EP1122440A1 Method of controlling a process for treating fluids |
| 08/01/2001 | EP1120612A1 Refrigerating cycle |
| 07/31/2001 | US6267565 Scroll temperature protection |
| 07/26/2001 | US20010009150 Fluid displacement pump with backpressure stop |
| 07/24/2001 | US6264445 Scroll compressor drive having a brake |
| 07/10/2001 | US6257854 Double screw rotor assembly having means to automatically adjust the clearance by pressure difference |
| 07/10/2001 | US6257852 Balancing structure of axial submission device for scroll compressor |
| 07/10/2001 | US6257840 Scroll compressor for natural gas |
| 07/10/2001 | US6257839 Double screw rotor assembly with electrically controlled clearance adjustment means |
| 07/10/2001 | US6257195 Internal combustion engine with substantially continuous fuel feed and power output |
| 06/28/2001 | WO2001046592A1 Dry compressing vacuum pump having a gas ballast device |
| 06/28/2001 | DE19962445A1 Dry compressing vacuum pump has gas ballast device with valve that only opens when difference between atmospheric pressure and pressure on pump side of valve exceeds set value |
| 06/28/2001 | DE19961317C1 Vakuumpumpe, insbesondere Flügelzellenvakuumpumpe Vacuum pump, in particular vane vacuum pump |
| 06/21/2001 | US20010004446 Temperature control systems for vacuum pumps |
| 06/20/2001 | EP1108893A2 Temperature control system for vacuum pumps |
| 06/20/2001 | EP1108892A2 Vane type vacuum pump |
| 06/20/2001 | CN1067465C Scroll compressor having discharge port inserts |
| 06/14/2001 | WO2001042660A1 Scroll compressor and air conditioner |
| 06/14/2001 | WO2001042658A1 Scroll type compressor |
| 06/12/2001 | US6244834 Variable capacity-type scroll compressor |
| 06/12/2001 | US6244824 System and methods for controlling rotary screw compressors |
| 05/31/2001 | US20010002239 Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor |
| 05/29/2001 | US6238188 Compressor control at voltage and frequency extremes of power supply |
| 05/29/2001 | CA2172745C Variable capacity vane compressor with linear actuator |
| 05/29/2001 | CA2058618C Scroll compressor with discharge valve opened by centrifugal force |
| 05/23/2001 | EP1101943A2 Control of a two-stage vacuum pump |
| 05/23/2001 | EP1101942A2 Evacuating apparatus |
| 05/22/2001 | US6233954 Method for controlling the operation of a compression system having a plurality of compressors |
| 05/17/2001 | WO2001034979A1 Scroll compressor for natural gas |
| 05/17/2001 | WO2001034945A1 Screw rotor machine having means for axially biasing at least one of the rotors |
| 05/15/2001 | US6231317 Sealed compressor driven by a motor |
| 05/15/2001 | US6231316 Scroll-type variable-capacity compressor |
| 05/10/2001 | CA2325701A1 System and method for automatic thermal protection of a fluid compressing system |
| 05/09/2001 | CN1065595C 涡旋式压缩机 Scroll compressor |
| 05/08/2001 | US6227834 Screw compressor with adjustment slide means |
| 05/03/2001 | WO2001031202A1 Multistage compressor unit and method for regulating such multistage compressor unit |
| 05/03/2001 | US20010000722 Multishaft electric motor and positive-displacement pump combined with such multishaft electric motor |
| 04/25/2001 | EP1094222A1 Automatic regulator for sucking air in a reservoir |
| 04/25/2001 | CN1292850A Scroll compressor with combined pressure ratio and pressure differential relief valve |
| 04/25/2001 | CN1065027C Speed detector of scroll-type fluid machine |
| 04/19/2001 | DE19942687A1 Rotating disk machine used as a compressor or vacuum pump for gaseous media comprises a side wall part which limits the compression chamber and can be displaced away from a side wall from the operating position into an emptying position |
| 04/17/2001 | US6216474 Part load performance of variable speed screw compressor |
| 04/11/2001 | CN1290816A Overheat protector for whirl compressor |
| 04/10/2001 | US6213731 Compressor pulse width modulation |
| 04/04/2001 | CN1289896A Improvement of partial load performance of speed variable helical-lobe compressor |
| 04/03/2001 | US6210120 Low charge protection vent |
| 04/03/2001 | US6210119 Reverse rotation detection compressors with a preferential direction of rotation |
| 03/29/2001 | WO2001021958A1 Screw compressor and refrigerator |
| 03/28/2001 | EP1087185A1 Improved part load performance of variable speed screw compressor |
| 03/28/2001 | EP1087142A2 Scroll compressor capacity control |
| 03/28/2001 | CN1289011A Pulse-width modulation of compressor |
| 03/27/2001 | US6206652 Compressor capacity modulation |
| 03/27/2001 | US6205808 Prevention of oil backflow from a screw compressor in a refrigeration chiller |
| 03/22/2001 | WO2001020167A1 A rotary positive-displacement fluid machine |
| 03/21/2001 | CN1063528C Vortex compressor |
| 03/20/2001 | US6203300 Scroll compressor with structure for preventing reverse rotation |
| 03/20/2001 | US6203299 Capacity modulation for scroll compressors |
| 03/20/2001 | US6202438 Compressor economizer circuit with check valve |
| 03/20/2001 | US6202424 System for compressing contaminated gas |
| 03/15/2001 | WO2001018461A1 Prevention of oil backflow from a screw compressor in a refrigeration chiller |
| 03/08/2001 | WO2001016490A1 Internal intermediate pressure 2-stage compression type rotary compressor |