| Patents for F04D 19 - Axial-flow pumps specially adapted for elastic fluids (3,780) |
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| 01/28/1999 | WO1999004171A1 Drive controller for motor-driven high-speed rotating body and method for discriminating type of machine used therefor |
| 01/28/1999 | DE19833040A1 Turbo-molecular pump with magnetic rotor bearing |
| 01/27/1999 | EP0893604A1 Turbomolecular pump |
| 01/20/1999 | CN2304778Y Axial fan |
| 01/13/1999 | CN2303958Y Axial intake-exhaust double-action water-ring pump |
| 01/06/1999 | CN2303104Y Double direction differential wind wheel air compressor used in ship |
| 12/30/1998 | EP0887556A1 Turbo-molecular pump |
| 12/23/1998 | WO1998058173A1 Getter pump especially suitable for the use upstream, in proximity and coaxially with respect to a turbomolecular pump |
| 12/23/1998 | EP0885359A1 Turbomolecular vacuum pumps with low susceptibility to particulate buildup |
| 12/23/1998 | CA2263559A1 Getter pump especially suitable for the use upstream, in proximity and coaxially with respect to a turbomolecular pump |
| 12/17/1998 | WO1998057088A1 Flange connection |
| 12/17/1998 | DE19724323A1 Flanschverbindung Flange |
| 12/15/1998 | US5848873 Vacuum pumps |
| 12/09/1998 | CN2299454Y Electronic mosquito-repellent fan |
| 12/02/1998 | EP0881394A2 Fan with blades having integral rotating venturi |
| 12/02/1998 | EP0881030A1 A process for milling the rotor of a turbomolecular pump |
| 11/18/1998 | CN2297573Y Cross flow cooling fan |
| 11/17/1998 | US5836754 Screw fluid machine and screw gear used in the same |
| 11/12/1998 | WO1998050689A1 Cooling device for a vehicle combustion motor |
| 11/05/1998 | DE19718704A1 Kühlvorrichtung für den Verbrennungsmotor eines Kraftfahrzeuges Cooling apparatus for the internal combustion engine of a motor vehicle |
| 11/04/1998 | EP0875694A2 Damper device and turbomolecular pump with damper device |
| 11/03/1998 | US5829957 Screw fluid machine and screw gear used in the same |
| 10/28/1998 | EP0874159A2 Friction vacuum pump with Gaede pump stage |
| 10/13/1998 | US5820345 Split rotor shaft driven lift fan |
| 10/06/1998 | US5816781 Motor-driven cooling ventilator |
| 09/30/1998 | EP0867627A2 Damper system for magnetically supported rotors |
| 09/10/1998 | DE19709205A1 Vacuum pump shaft bearing mounting |
| 09/10/1998 | DE19708915A1 Axial fan especially for vehicle radiator |
| 09/08/1998 | US5803709 Axial flow fan |
| 08/27/1998 | WO1998037319A1 Fan ring seal |
| 08/25/1998 | CA2000152C Evacuation apparatus |
| 08/13/1998 | DE19706004A1 Fan for conducting fluids through pipe with motor-driven rotary elements |
| 08/12/1998 | EP0857876A2 Method and apparatus to control the suction capacitiy of vacuum pumps |
| 08/05/1998 | EP0856108A1 Friction vacuum pump with intermediate inlet |
| 08/05/1998 | CN1189880A Axial fan assembly with low noise and high efficiency |
| 07/30/1998 | WO1998032973A1 Magnetically suspended high velocity vacuum pump |
| 07/30/1998 | WO1998032972A1 Turbo molecular pump |
| 07/29/1998 | EP0855517A2 Vacuum pump |
| 07/21/1998 | US5782609 Vacuum pump having different diameter rotors and a drive motor synchronization system |
| 07/16/1998 | WO1998030803A1 Counter-rotating compressors with control of boundary layers by fluid removal |
| 07/15/1998 | EP0746689A4 Housing with recirculation control for use with banded axial-flow fans |
| 07/01/1998 | EP0851127A2 Diagnostic method and apparatus for vacuum pumps |
| 06/30/1998 | US5772395 Vacuum pumps |
| 06/25/1998 | WO1998027342A1 Turbomolecular vacuum pumps with low susceptibility to particulate buildup |
| 06/10/1998 | CN2283746Y High-temp. smoke discharging pump for fire fighting |
| 06/02/1998 | US5758716 Radiator unit for internal combustion engine |
| 05/26/1998 | US5755554 Multistage pumps and compressors |
| 05/20/1998 | EP0633976B1 Mounting of axial turbo-machinery |
| 05/07/1998 | WO1998019070A1 Fan rotor |
| 05/07/1998 | CA2265860A1 Fan rotor |
| 05/05/1998 | US5746581 Method and apparatus for evacuating vacuum system |
| 04/15/1998 | EP0836009A2 An electronic control unit for a vacuum pump |
| 04/15/1998 | EP0836008A2 A vacuum pumping device |
| 04/08/1998 | EP0834022A1 Axial fan assembly |
| 04/02/1998 | DE19638518A1 Axial impeller for cooling motor vehicle IC engine |
| 03/31/1998 | US5733104 For a multi-stage gas inlet system |
| 03/25/1998 | CN2277002Y Eddy current draught fan |
| 03/24/1998 | US5730583 Axial flow fan blade structure |
| 03/18/1998 | EP0829645A2 Turbomolecular pump |
| 03/11/1998 | EP0828080A2 Drag vacuum pump |
| 03/04/1998 | CN2275654Y Self-cooled draught fan |
| 03/03/1998 | US5722819 Molecular drag pump |
| 02/26/1998 | WO1998007989A1 Friction vacuum pump |
| 02/26/1998 | DE19714531A1 Rotary blade axial exhaust ventilator for chimneys etc. |
| 02/25/1998 | EP0825346A1 Inlet-stage for a double-flow gas friction pump |
| 02/25/1998 | EP0697068B1 Friction vacuum pump with bearing support |
| 02/24/1998 | US5720661 Inversion type ventilating fan |
| 02/24/1998 | US5720174 Secondary pump unit |
| 02/19/1998 | DE19632874A1 Reibungsvakuumpumpe Friction vacuum pump |
| 02/04/1998 | CN1172218A Puddle with wheel rim |
| 01/21/1998 | EP0819861A2 Magnetic bearing devices |
| 01/21/1998 | EP0819856A1 Vacuum pump |
| 01/20/1998 | US5709537 Evacuating apparatus |
| 01/20/1998 | US5709528 Turbomolecular vacuum pumps with low susceptiblity to particulate buildup |
| 01/14/1998 | CN1170091A Air moving device |
| 01/13/1998 | US5707222 Vacuum pump with resilient drive |
| 01/13/1998 | US5707213 For compressing gases |
| 01/13/1998 | US5707206 Turbomachine |
| 01/13/1998 | US5707205 Air moving device |
| 01/07/1998 | EP0816688A1 Air moving device |
| 01/03/1998 | CA2180482A1 Axial flow compressor with active stator stages |
| 12/31/1997 | CN2271625Y Low noise axial fan |
| 12/09/1997 | US5695316 Friction vacuum pump with pump sections of different designs |
| 11/19/1997 | CN2268133Y Wind-protecting air-inducing device for flue pipe |
| 11/18/1997 | US5688106 Turbomolecular pump |
| 11/12/1997 | EP0806571A2 A rotatable assembly for supporting the rotor of a vacuum pump |
| 11/11/1997 | US5686772 Magnetic bearing and an assembly comprising a stator portion and a rotor portion suspended via such a bearing |
| 11/05/1997 | EP0805275A2 Vacuum pumps |
| 10/23/1997 | WO1997039244A1 Vaned rotary apparatus |
| 10/23/1997 | CA2252222A1 Vaned rotary apparatus |
| 10/22/1997 | CN2265447Y Wind-resistance high-efficiency scavenger fan |
| 10/21/1997 | US5679992 Bearing unit |
| 10/08/1997 | EP0799999A2 A rotor for turbomolecular pump |
| 10/07/1997 | US5674063 Screw fluid machine and screw gear used in the same |
| 10/02/1997 | DE19612923A1 Air blower |
| 10/01/1997 | CN2263727Y Guiding movable scavenger fan |
| 09/24/1997 | EP0797007A1 Fan and fan drive and assembly thereof |
| 09/16/1997 | US5667363 Magnetically supported friction pump |
| 09/10/1997 | CN2262128Y Front bended sweepforward assembled axial-flow blower |
| 09/10/1997 | CN2262127Y Axial-flow ventilator for pipe line |