| Patents for F04D 19 - Axial-flow pumps specially adapted for elastic fluids (3,780) |
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| 05/18/1994 | CN2165270Y Adjustable axial-flow fan |
| 05/18/1994 | CN2165269Y Sweptforward front-inclined blade type low-noise axial-flow fan |
| 04/12/1994 | US5302089 Fluid rotating apparatus |
| 03/31/1994 | WO1994007033A1 Turbo-molecular blower |
| 03/31/1994 | CA2158924A1 Turbo-molecular blower |
| 03/30/1994 | EP0589362A1 Vacuum pump apparatus |
| 03/23/1994 | CN1084258A Double-shell mine axial flow main fan |
| 03/22/1994 | US5295798 Fluid rotating apparatus with rotor communicating path |
| 03/09/1994 | EP0585911A1 Two stage primary dry pump |
| 03/03/1994 | WO1994004825A1 Process for monitoring the operative position of the rotary system of a vacuum pump, especially a turbo-molecular pump |
| 02/24/1994 | DE4327506A1 Turbo vacuum pump assembly - has housing with suction and delivery apertures and contg. evacuating pump which compresses gas sucked in through suction aperture |
| 02/24/1994 | DE4227663A1 Verfahren zur Überprüfung der Betriebsposition des rotierenden Systems einer Vakuumpumpe, vorzugsweise Turbomolekularpumpe Method for checking the operating position of the rotating system of a vacuum pump, preferably turbomolecular pump |
| 02/16/1994 | CN2156323Y Multi-blade wind leading machine |
| 02/08/1994 | US5285140 Gas friction pump |
| 01/06/1994 | WO1994000694A1 Gas friction vacuum pump |
| 12/23/1993 | DE4220015A1 Gas friction vacuum pump with high vacuum section and pre-vacuum section - has cooling system for high vacuum section and pump is equipped with heater at its pre-vacuum section |
| 12/09/1993 | DE4317205A1 Turbo-molecular pump for conditions of high vacuum - uses ceramic coated blading in region of pump outlet to improve heat transfer |
| 11/25/1993 | WO1993023672A1 Gas friction vacuum pump |
| 11/18/1993 | DE4216237A1 Gasreibungsvakuumpumpe Gas friction vacuum pump |
| 11/10/1993 | EP0436673B1 Electronically controlled cryopump |
| 11/03/1993 | EP0568069A2 Turbomolecular vacuum pumps |
| 10/21/1993 | DE4213279A1 Multistage axial flow compressor - has sequence of impeller crowns with one crown having opposite flow direction to adjacent crown |
| 10/20/1993 | CN2144202Y Horizontal cantilever axial-flow pump |
| 10/14/1993 | WO1993020334A1 Mounting of axial turbo-machinery |
| 10/07/1993 | DE4309929A1 Process evacuating e.g. hydrogen@ by means of vacuum pump - using cooled pump interior and reduced gas speed to facilitate evacuation of light elemental gases |
| 10/06/1993 | CN2143266Y Automatic and electronic timing switch |
| 09/30/1993 | DE4231105C1 Matched family of fan rotors for industrial ventilation system - has rotors of ascending diameter with blade number and geometry varied to produce range of air deliveries at constant pressure and rpm |
| 09/15/1993 | CN1076256A Multipurpose asynchronous motor axial-flow pump |
| 09/14/1993 | US5244347 High efficiency, low noise, axial flow fan |
| 09/14/1993 | CA1322105C Electronically controlled cryopump |
| 09/01/1993 | CN1075779A Combined driving molecular pump |
| 08/24/1993 | US5238362 Turbomolecular pump |
| 08/10/1993 | US5234323 Fluid positive displacement machine with gas injection in the discharge region |
| 08/05/1993 | DE4216387A1 Device to reverse air flow in double ended shaft - comprises fixed fan with suction and output sides and shutters pivoted on opposite sides of shaft |
| 08/04/1993 | EP0553935A1 Electronically controlled cryopump |
| 06/30/1993 | EP0549004A1 An electronic braking device for asynchronous motors |
| 06/30/1993 | CN2137299Y Energy-saving axial fan |
| 06/22/1993 | US5221179 Vacuum pump |
| 06/16/1993 | CN1073240A Axial flow fan |
| 06/15/1993 | US5219269 Vacuum pump |
| 06/09/1993 | EP0545719A1 Vacuum pumps |
| 06/09/1993 | EP0545706A1 Vacuum pumps |
| 06/09/1993 | DE4239391A1 Aluminium magnesium, titanium wear resistant rotor - comprises oxide ceramic layer with fluoro polymer, e.g. poly:tetra:fluoroethylene, for resistance to corrosion for turbo mol. pump |
| 06/08/1993 | US5217346 Vacuum pump |
| 05/26/1993 | EP0543694A1 Shrouding for a fan and its application in an automobile engine fan |
| 05/12/1993 | EP0540970A1 Spacer element with adjustable thickness |
| 05/11/1993 | US5209631 Arrangement for flooding high speed vacuum pumps |
| 05/11/1993 | US5209608 Air grain conveyor system |
| 04/14/1993 | EP0536662A1 High efficiency, low noise, axial flow fan |
| 03/31/1993 | EP0534808A1 Motor ventilator, in particular for a motor vehicle |
| 03/30/1993 | US5197861 Fluid rotating apparatus |
| 03/30/1993 | US5197854 Axial flow fan |
| 03/18/1993 | WO1993005299A1 Axial flow fan |
| 03/16/1993 | US5193608 Radiator with fan for motor vehicles |
| 03/10/1993 | EP0530462A1 Friction vacuumpump |
| 03/04/1993 | WO1993004288A1 Pump or compressor unit |
| 03/04/1993 | WO1993004287A1 Air-flow duct for axial-flow air fan |
| 03/04/1993 | CA2116001A1 Pump or compressor unit |
| 03/03/1993 | CN2127750Y Helicoidal pump |
| 03/02/1993 | US5190438 Cooling jacket |
| 02/23/1993 | US5188514 Process for manufacturing an impeller by electrical discharge machining and articles so obtained |
| 02/23/1993 | US5187938 Method and a device for precooling the helium tank of a cryostat |
| 02/18/1993 | DE4127099A1 Belueftungsschacht fuer axialluefter Belueftungsschacht for axial fans |
| 02/04/1993 | WO1993002291A1 Axial fans |
| 01/13/1993 | EP0522603A1 Pumping stage for turbomolecular pumps |
| 01/06/1993 | CN2126526Y Axial flow compressor |
| 12/30/1992 | CN1019675B Vacuum pump |
| 12/16/1992 | CN2125035U Spiral fan |
| 12/09/1992 | CN2124334U Axial fan |
| 12/02/1992 | CN2123633U Axial-flow ventilator for mine |
| 11/24/1992 | US5166566 Magnetic bearings for a high speed rotary vacuum pump |
| 11/24/1992 | US5165872 Gas friction pump having a bell-shaped rotor |
| 11/05/1992 | DE4113068A1 Ascertaining or regulating RPM of async. motor - altering frequency of variable voltage or current source until characteristic signal indicates switching between motor and generator modes |
| 11/03/1992 | US5160250 Vacuum pump with a peripheral groove pump unit |
| 10/27/1992 | US5158426 Stator assembly for a turbomolecular pump |
| 10/27/1992 | US5157928 Electronically controlled cryopump |
| 10/13/1992 | US5154572 Vacuum pump with helically threaded cylinders |
| 10/06/1992 | US5152679 Turbo molecular pump |
| 09/26/1992 | CA2038959A1 Fan assembly |
| 09/16/1992 | CN2116108U High temperature reversible axial-flow fan |
| 09/15/1992 | US5146765 Device for evaporatie cooling of the neck |
| 09/10/1992 | DE4206972A1 Multi-stage vacuum pump - contains several rotors on several shafts |
| 08/26/1992 | EP0499698A2 Ventilator drive with fluid friction coupling |
| 08/19/1992 | CN1063745A Mine shaft main fan backflow method and device thereof |
| 08/18/1992 | US5139396 Ball bearing for use in vacuum and turbo-molecular pump incorporating same |
| 07/29/1992 | CN2111389U Plastic pneumatic local fan machine for mine |
| 07/15/1992 | CN2110107U Axial-flow air machine for brickkiln |
| 07/01/1992 | EP0492332A1 Vacuum pump with injection of dry gas |
| 06/17/1992 | CN2107551U Axial-flow ventilation fan for mine |
| 06/09/1992 | US5120208 Molecular drag pump with rotors moving in same direction |
| 06/02/1992 | US5118251 Compound turbomolecular vacuum pump having two rotary shafts and delivering to atmospheric pressure |
| 05/29/1992 | WO1992008879A1 Device for minimizing room temperature gradients |
| 05/26/1992 | US5116196 Mechanical pump assembly for pumping a secondary vacuum, and a leak detection installation using such an assembly |
| 05/19/1992 | US5114316 Method of regenerating a vacuum pumping device |
| 05/12/1992 | CA1300579C Vacuum pump |
| 05/06/1992 | CN2103677U Axial-flow fan for air-condition and ventilation |
| 04/21/1992 | US5106273 Vacuum pump for producing a clean molecular vacuum |
| 04/08/1992 | EP0478882A1 Stator for a turbomolecular pump |
| 04/01/1992 | EP0477924A1 Turbo vacuum pump |
| 03/08/1992 | CA2024837A1 Safety device for a ceiling fan |