| Patents for F04D 19 - Axial-flow pumps specially adapted for elastic fluids (3,780) |
|---|
| 03/04/1992 | EP0472933A2 Fluid rotating apparatus |
| 03/03/1992 | US5093754 Control system for a magnetic levitation body |
| 03/03/1992 | US5092740 Composite vacuum pump |
| 02/12/1992 | EP0470637A1 Turbo molecular pump |
| 01/22/1992 | EP0467336A2 Bi-directional axial-flow blower |
| 01/22/1992 | EP0467148A1 Venting device for fast rotating vacuum pumps |
| 01/08/1992 | EP0464571A1 Device for the safe managing of a vacuum pump |
| 01/08/1992 | EP0464292A1 Second stage mechanical vacuum pumping unit and leak detection system using such a unit |
| 01/07/1992 | US5078574 Device for minimizing room temperature gradients |
| 01/01/1992 | CN2091975U Bidirectional axial flow fan |
| 12/24/1991 | US5074747 Vacuum pump |
| 12/03/1991 | US5069603 Bearings for use in negative-pressure environments |
| 11/27/1991 | CN2089540U Double rotor para cyclone |
| 11/05/1991 | US5062771 Vacuum system with a secondary gas also connected to the roughing pump for a semiconductor processing chamber |
| 11/05/1991 | US5062271 Evacuation apparatus and evacuation method |
| 10/31/1991 | DE4113122A1 Vacuum pump with cylindrical rotor - has screw-shaped grooves on rotor surface with fixed cylindrical section |
| 10/30/1991 | CN1055800A 真空泵 Vacuum pump |
| 10/22/1991 | US5059092 Vacuum pump having emergency bearings |
| 10/16/1991 | EP0451708A2 Vacuum pump |
| 10/01/1991 | US5052887 Turbomolecular vacuum pump |
| 09/24/1991 | US5051060 Gas friction pump having an outlet-side helical stage |
| 09/18/1991 | EP0446723A1 Ball bearing for use in vacuum and turbo-molecular pump incorporating same |
| 09/18/1991 | CN2084994U Controlled electric submersible pump working based on different work conditions |
| 09/11/1991 | EP0445855A1 Improved turbomolecular pump |
| 09/11/1991 | EP0445691A1 Vacuum pump with magnetic suspension |
| 09/11/1991 | EP0445690A1 Vacuum pump for a clean vacuum |
| 08/22/1991 | WO1991012651A1 Energy converter |
| 08/21/1991 | EP0442556A1 A stator for a turbo-molecular pump |
| 08/20/1991 | US5040949 Two stage dry primary pump |
| 07/31/1991 | CN2081907U High-efficiency axial-flow pump |
| 07/23/1991 | US5033936 Rotor blades of turbomolecular pump |
| 07/03/1991 | EP0435291A1 Combined turbomolecular vacuum pump with two shafts and discharge at atmospheric pressure |
| 07/03/1991 | EP0434939A1 Drag vacuum pump |
| 07/03/1991 | CN1013050B Disk shaped turbine compounded molecular pump |
| 07/02/1991 | US5028219 Bearings for use in negative-pressure environments |
| 06/05/1991 | EP0430009A1 Power supply unit for a vacuum pump with magnetic thrust bearings and with an auxiliary power supply for the thrust bearings in case of a power failure |
| 06/04/1991 | US5020969 Turbo vacuum pump |
| 05/15/1991 | CN2077052U High-temp. axial flow fan |
| 05/15/1991 | CN2077051U Lf type bidirectional rotary axial flow fan |
| 05/08/1991 | EP0426233A1 A process for manufacturing an impeller or a rotor having one or more blades for a turbine pump by means of electrical discharge machining, and articles so obtained |
| 05/01/1991 | CN1012518B Composite molecular pump |
| 04/30/1991 | US5011368 Vacuum pump of the type having a Gaede channel |
| 04/24/1991 | CN2075715U Energy saving low noise axial-flow blower |
| 04/17/1991 | CN2075268U High-efficient low-noise axial-flow fan |
| 03/13/1991 | CN2073045U High pressure and low noise ventilator for tunnel |
| 03/06/1991 | EP0415315A1 Primary vacuum pump |
| 02/27/1991 | EP0414127A1 Vacuum pump with magnetic bearing |
| 02/27/1991 | EP0413851A1 Bearing ring for magnetic bearing |
| 02/20/1991 | EP0413663A2 Industrial axial-flow fan having offset airfoil-to-hub mounting system for improved aerodynamic performance |
| 02/13/1991 | EP0412476A2 Vacuum pump with rotor and rotor bearings running under vacuum |
| 02/13/1991 | CN2071269U Two time used pump shaft of well immersed pump |
| 02/13/1991 | CN1049217A Annular axial-flow fan |
| 01/23/1991 | EP0408792A1 Drag vacuum pump with at least one helical stage at the discharge end |
| 01/23/1991 | EP0408791A1 Drag pump with a bell-shaped rotor |
| 12/18/1990 | US4978276 Pump stage for a high-vacuum pump |
| 12/12/1990 | EP0401741A1 Two stage primary dry pump |
| 12/06/1990 | DE3938975C1 Gas feed for process plant - uses identical fans and housings to give equal efficiency in either direction |
| 11/22/1990 | EP0398156A2 Method and device for precooling the helium vessel of a cryostat |
| 11/15/1990 | WO1990013746A1 Propeller |
| 11/14/1990 | EP0397051A1 Evacuation apparatus and evacuation method |
| 10/24/1990 | EP0393283A1 A ducted fan gas turbine engine with a spinner. |
| 10/18/1990 | DE3910784A1 Reversible rotor blade (180@) |
| 09/19/1990 | CN2062385U Axial-flow bolwer for external rotor motor |
| 09/13/1990 | DE3907591A1 Two-stage fan, pumps or the like, in particular for medical purposes |
| 09/04/1990 | US4954047 Evacuation apparatus |
| 08/22/1990 | CN1009297B Disk turbine molecular pump |
| 08/07/1990 | US4946345 Turbo-molecular pump |
| 08/01/1990 | CN1009025B Vacuum distributor |
| 07/18/1990 | EP0378163A2 Gaede-type vacuum pump |
| 07/11/1990 | CN2059192U Low noise axial-flow blower |
| 07/10/1990 | US4940341 Oil-metering cover for shaft bearings |
| 06/12/1990 | US4932838 Fluid apparatus |
| 05/29/1990 | US4929151 Vacuum pump |
| 05/23/1990 | CN2057474U Explosion-proof axial-flow ventilator for mine |
| 05/22/1990 | US4926648 Turbomolecular pump and method of operating the same |
| 05/17/1990 | WO1990002878A3 Electronically controlled cryopump |
| 05/15/1990 | CA1269079A1 Disks with blades |
| 04/24/1990 | US4919599 Pumping system for a leak detecting device |
| 04/24/1990 | US4918930 Electronically controlled cryopump |
| 04/18/1990 | EP0363503A1 Pump stage for a high vacuum pump |
| 03/28/1990 | CN2055197U Explosion-proof local ventilation blower used in coal mine |
| 03/22/1990 | WO1990002878A2 Electronically controlled cryopump |
| 02/28/1990 | EP0355616A2 Shaft with a central bore |
| 02/27/1990 | US4904155 Vacuum pump |
| 02/08/1990 | DE3922782A1 Molecular pump in a unit design |
| 01/31/1990 | EP0352688A1 Vacuum pump |
| 01/31/1990 | CN1039287A Composite molecular pump |
| 01/24/1990 | CN1039088A Molecular vacuum turbine pump |
| 01/18/1990 | DE3919529A1 Vacuum pump |
| 01/17/1990 | CN1038859A Turbomolecular vacuum pump |
| 01/17/1990 | CN1006491B Turbomolecular pump |
| 01/16/1990 | US4893985 Multi-stage molecular pump |
| 01/03/1990 | EP0348931A1 Turbomolecular pump |
| 12/12/1989 | US4886418 Blower for delivering cooling air to internal combustion engines |
| 12/06/1989 | EP0344503A2 Magnetic bearing for a fast rotating vacuum pump |
| 12/06/1989 | EP0344345A1 Pumpsystem for a leak detecting apparatus |
| 11/23/1989 | EP0342515A2 Turbomolecular pump |
| 11/15/1989 | CN1037196A Molecular pump |
| 11/15/1989 | CN1037195A Molecular pump |
| 11/09/1989 | DE3814612A1 Ceiling fan |