| 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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| 08/10/2004 | US6772607 Refrigerating device |
| 08/05/2004 | US20040151602 Screw compressor |
| 08/05/2004 | US20040151601 Water-injected screw compressor |
| 08/04/2004 | EP1442222A1 Vacuum pump |
| 08/04/2004 | CN1517559A Variable capacitance rotary compressor |
| 08/04/2004 | CN1517557A Rotary compressor and refrigerant circulation system with rotaray compressor |
| 08/04/2004 | CN1517553A Power regulation vortex machine |
| 08/03/2004 | US6769888 Scroll compressor having a valved back pressure chamber and a bypass for overcompression |
| 08/03/2004 | US6769881 Vacuum preventing device for scroll compressor |
| 08/03/2004 | US6769264 Control system of degree of superheat of air conditioner and control method thereof |
| 07/29/2004 | US20040146419 Variable displacement mechanism for scroll type compressor |
| 07/28/2004 | EP0988494B1 Refrigeration chiller and start-up method for a refrigeration chiller |
| 07/28/2004 | EP0987440B1 Capacity control scroll compressor |
| 07/28/2004 | EP0982498B1 Capacity control scroll compressor |
| 07/28/2004 | CN1159529C Scrawl compressor |
| 07/21/2004 | CN1158462C Oil level sight glass for compressor |
| 07/15/2004 | US20040136852 Vacuum pump with fail-safe vanes |
| 07/14/2004 | CN1512073A Lubricant flow control system and method in variable speed compressor package |
| 07/14/2004 | CN1512065A Lubricating-free screw compressor |
| 07/13/2004 | US6761545 Scroll compressor with flow restriction and back pressure chamber tap |
| 07/13/2004 | US6761542 Multishaft electric motor and positive-displacement pump combined with such multishaft electric motor |
| 07/08/2004 | US20040131490 Variable capacity rotary compressor |
| 07/08/2004 | US20040129017 Rotary compressor and refrigerant cycle system having the same |
| 07/07/2004 | CN1510309A Vaccum preventing device for vortex complessor |
| 07/07/2004 | CN1510274A Device for preventing vaccum in vortex compressor |
| 07/07/2004 | CN1510273A Vortex machine |
| 07/06/2004 | US6758051 Method and system for diagnosing a cooling system |
| 07/06/2004 | US6758050 Compressor diagnostic system |
| 07/01/2004 | US20040126262 Gas compressor |
| 07/01/2004 | US20040126260 Scroll compressor with flow restriction and back pressure chamber tap |
| 07/01/2004 | US20040126259 Vacuum preventing device of scroll compressor |
| 07/01/2004 | US20040126255 Fluid pump |
| 07/01/2004 | US20040126246 Load-regulating device for scroll type compressors |
| 07/01/2004 | US20040126244 Vacuum pumping system and method of controlling the same |
| 07/01/2004 | US20040124731 Electric motor and electric type compressor |
| 07/01/2004 | US20040123612 Cooling system with variable duty cycle capacity control |
| 06/30/2004 | EP1433953A2 Reversible pneumatic group with two stages |
| 06/29/2004 | US6755620 Independent rotational speed control of multi-stage variable speed compressor |
| 06/24/2004 | WO2004053334A1 Screw compressor witrh axially sliding capacity control valve |
| 06/24/2004 | DE10258540A1 Operation method of screw compressor in refrigeration system has pressure difference between suction and pressure sides measured and referred to frequency converter to change motor speed |
| 06/23/2004 | CN1507542A Scroll type fluid machine |
| 06/23/2004 | CN1507541A 涡旋压缩机 Scroll Compressor |
| 06/23/2004 | CN1506586A Vortex type compressor |
| 06/23/2004 | CN1506584A Power modulating vortex machine |
| 06/17/2004 | WO2004051089A1 Screw compressor |
| 06/17/2004 | US20040115063 Scroll compressor |
| 06/17/2004 | US20040112679 System and method for lubricant flow control in a variable speed compressor package |
| 06/17/2004 | DE10351519A1 Capacitance variable mechanism of scroll compressor for vehicle air conditioner, has actuator which drives rotary board to perform opening/closing of pass route which connects compression chamber and introduction chamber |
| 06/15/2004 | US6749405 Identically oriented pairs of alternating intake and exhaust ports;pumping efficiency; medical equipment |
| 06/15/2004 | US6749404 Scroll compressors |
| 06/10/2004 | US20040109782 Compact control mechanism for axial motion control valves in helical screw compressors |
| 06/09/2004 | EP1426620A2 Variable speed control of multiple motors |
| 06/09/2004 | CN1502814A Compressor driving device and freezing air conditioner device |
| 06/08/2004 | US6745584 Digital scroll condensing unit controller |
| 06/01/2004 | US6742996 Scroll compressor with mechanically actuated capacity control |
| 06/01/2004 | US6742350 Hybrid compressor device |
| 05/27/2004 | WO2004044431A2 Vacuum pump |
| 05/27/2004 | US20040101428 Scroll type fluid machine |
| 05/27/2004 | US20040101411 Multi-stage screw compressor |
| 05/27/2004 | US20040100351 Motor protector particularly useful with hermetic electromotive compressors |
| 05/25/2004 | US6739853 Compact control mechanism for axial motion control valves in helical screw compressors |
| 05/25/2004 | US6739841 Oil free screw compressor operating at variable speeds and control method therefor |
| 05/20/2004 | US20040096333 Variable speed oil-injected screw compressors |
| 05/19/2004 | EP1068454B1 Screw rotor compressor having a movable wall portion |
| 05/19/2004 | CN1497636A Electric machine protector special for hermetically-sealed electric compressor |
| 05/18/2004 | US6736621 Scroll compressor with adjustable capacity |
| 05/18/2004 | US6736620 Scroll-type fluid machine having at least one inlet or outlet of a plurality able to be closed by a closure member |
| 05/12/2004 | CN1495396A Air conditioner, outdoor unit and refrigerating unit |
| 05/12/2004 | CN1495362A 流体泵 Fluid pump |
| 05/11/2004 | US6735284 System for controlling motor and method for the same |
| 05/11/2004 | US6732542 Defroster of refrigerant circuit and rotary compressor |
| 05/11/2004 | CA2290398C Start-up method and apparatus in refrigeration chillers |
| 05/06/2004 | WO2004038222A1 Improvements in dry pumps |
| 05/06/2004 | US20040084984 Synchronous induction motor and manufacturing method and drive unit for the same, and hermetic electric compressor |
| 05/06/2004 | DE10341106A1 System und Verfahren zur Motorsteuerung System and method for motor control |
| 04/29/2004 | WO2004036049A1 Screw pump |
| 04/29/2004 | WO2004036047A1 Rotary piston vacuum pump with washing installation |
| 04/29/2004 | WO2004036045A1 Variable inner volume ratio-type inverter screw compressor |
| 04/29/2004 | US20040081562 Dual volume-ratio scroll machine |
| 04/28/2004 | EP1413760A2 Scroll compressor with continuous capacity modulation |
| 04/28/2004 | CN1492150A 螺杆压缩机 Screw compressor |
| 04/27/2004 | US6725644 Combined input and output system for an internal combustion engine and turbine power plant |
| 04/21/2004 | EP1411536A1 Motor protector particularly useful with hermetic electromotive compressors |
| 04/21/2004 | CN1490526A 真空泵 Vacuum pump |
| 04/20/2004 | US6722867 Rotary compressor for vehicle |
| 04/20/2004 | US6722861 Scroll compressor with motor control for capacity modulation |
| 04/20/2004 | US6722858 Oil-cooled type compressor |
| 04/15/2004 | US20040071560 Rotary compressor |
| 04/15/2004 | US20040070364 System for controlling motor and method for the same |
| 04/15/2004 | DE19882900B4 Schraubenrotor-Nassvakuumpumpe Screw rotor wet vacuum pump |
| 04/14/2004 | EP1407147A1 Screw compressor |
| 04/14/2004 | EP1407146A1 Water-injected screw compressor |
| 04/14/2004 | CN1489278A Motor control system and method |
| 04/14/2004 | CN1488861A 旋转式压缩机 Rotary compressor |
| 04/14/2004 | CN1145767C Prevention of oil backlow and relative screw compressor and refrigeration chiller |
| 04/08/2004 | US20040067146 Scroll compressor with adjustable capacity |
| 04/07/2004 | EP1127220B1 Lift valve for a rotary screw compressor |
| 04/07/2004 | CN1487198A Air compressor |
| 04/07/2004 | CN1487197A Vacuumproof device for vortex type compressor |
| 04/06/2004 | US6716009 Scroll type compressor |