| Patents for F04D 25 - Pumping installations or systems specially adapted for elastic fluids (17,127) |
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| 04/16/1991 | US5007241 Kinetic energy recovery device of liquid and gas |
| 04/10/1991 | EP0420899A1 Multi-stage vacuum-pump set |
| 04/10/1991 | EP0303641B1 Transport ventilator |
| 04/10/1991 | CN2074836U Quick starting safety health care electric fan |
| 04/10/1991 | CN2074835U Two-speed automatic timing changing electric fan |
| 04/03/1991 | CN2074389U Swing angle regulator of electric fan |
| 04/03/1991 | CN2074388U Reversible energy-saving fan |
| 04/03/1991 | CN2074387U Lower bearing for ceiling fan |
| 03/27/1991 | CN2073949U Cold wind and sweet smell device for electric fan |
| 03/27/1991 | CN2073948U Automatic adjustable wind volume pendent (electric) fan with lamp |
| 03/27/1991 | CN1012152B Centrifugal pressure expanding propeller |
| 03/20/1991 | EP0418027A1 A cooling fan for rotating electrical machinery |
| 03/20/1991 | CN2073497U Horizontal long-shaft type domestic draught fan |
| 03/20/1991 | CN2073496U Full plastic sealed type draught fan |
| 03/20/1991 | CN2073495U Alternating current synchronous pendent fan with directive start device |
| 03/20/1991 | CN1050078A Dust-removing draught fan |
| 03/19/1991 | WO1991004417A1 Pump or compressor unit |
| 03/19/1991 | CA2066672A1 Pump or compressor unit |
| 03/19/1991 | CA1281769C Electronically programmable universal brushless dc fan with integral tracking and locked rotor protection |
| 03/19/1991 | CA1281547C Adjustable air sweep mechanism for a room air conditioner |
| 03/13/1991 | CN2073089U High efficiency and low noise draught fan of boiler |
| 03/13/1991 | CN2073045U High pressure and low noise ventilator for tunnel |
| 03/13/1991 | CN2073044U Swing blades fan |
| 03/13/1991 | CN2073043U Wave pulsation electric fan |
| 03/13/1991 | CN2073042U 低噪声离心风机 Low noise centrifugal fan |
| 03/06/1991 | CN2072608U Multi-functional portable pocket electric fan |
| 03/05/1991 | CA1281066C2 Ironless, brushless d.c. motor with wave winding |
| 02/21/1991 | DE4023258A1 Blocking reverse motion in cross-flow fan - involves use of pre-sprung blocking elements |
| 02/20/1991 | EP0413113A2 Electronically commutated motor for vacuum cleaner and the like |
| 02/12/1991 | CA1280100C Air turbulence blades for ceiling fans |
| 02/07/1991 | DE3925471A1 Air pressure converter producing electrical power - has rotor(s) driving generators using blowers to produce air pressure on blades |
| 02/06/1991 | CN2070838U Fan of adjusting speed by air damping for wind guide wheel |
| 02/05/1991 | US4990060 Air pump with secondary air inlet |
| 01/31/1991 | DE3924755A1 Seating space cooling arrangement for vehicle esp. when stationary - provide solar cell in sliding roof and electric roof fan near opening |
| 01/29/1991 | US4988067 Electrical box hanger |
| 01/24/1991 | DE3924071A1 Rotary pump with sealing discs - has compact installation alongside shaft bearings |
| 01/24/1991 | DE3922772A1 Radial flow extractor fan - has each blade root on same radial line as tip of adjacent one |
| 01/23/1991 | EP0408729A1 Portable water driven high velocity fan. |
| 01/16/1991 | EP0408221A2 DC motor driven centrifugal fan |
| 01/16/1991 | EP0407750A1 Liquid friction coupling |
| 01/15/1991 | WO1991001586A1 A fan for an electrically operated machine |
| 01/10/1991 | DE3920258A1 Supercharger for IC engine - has rotor working in conjunction with surrounding housing for compressing drawn-in combustion air |
| 01/09/1991 | CN2069046U Console model electric fan being able to rotate in rotation |
| 01/09/1991 | CN2069045U Electric fan driven by syncmotor |
| 01/09/1991 | CN2069044U Power-saving fan being ac or dc electrically driven |
| 01/09/1991 | CN1048439A Oppositely-arranged double-rotor centrifugal fluid-charger |
| 01/02/1991 | CN2068616U Circumference ceiling fan with directional device |
| 01/02/1991 | CN2068615U Multi-vane returnable fan |
| 01/02/1991 | CN2068614U Dual purpose electric fan producing cold/hot wind |
| 01/02/1991 | CN2068613U 便携式电扇 Portable fans |
| 01/02/1991 | CN2068612U Cycle water pump |
| 12/27/1990 | WO1990015581A1 Dental system |
| 12/27/1990 | EP0404299A1 Brushless motor |
| 12/25/1990 | US4979363 Fluid flow |
| 12/18/1990 | US4977884 Fail-safe blower drive for roof mounted kitchen hood grease exhaust blowers |
| 12/11/1990 | US4976319 Water driven fan for firefighting |
| 12/05/1990 | CN2066910U Combined lamp and fan |
| 11/28/1990 | CN2066523U Pendant lifting featheirng fan |
| 11/28/1990 | CN2066522U Ceiling fan with warping shape blade |
| 11/28/1990 | CN2066521U Multifunctional energy saving fan |
| 11/28/1990 | CN2066520U Water sucking cooling device used on fan |
| 11/28/1990 | CN2066497U Hanging industrial pump driven by aviation gas-turbine |
| 11/27/1990 | US4972570 Method of manufacturing an oscillating fan |
| 11/14/1990 | CN2065688U All-position stereo electric fan |
| 11/14/1990 | CN2065687U Blade swing type electric fan |
| 11/13/1990 | US4969803 Compressor unit |
| 11/07/1990 | CN2065256U Electric fan having lamp box with decorative drawing |
| 10/31/1990 | EP0395163A1 Improved hair dryer with spiral blower |
| 10/30/1990 | CA1275679C Motor driven air moving apparatus for high speed, constant duty operation |
| 10/17/1990 | EP0391902A1 Mechanically driven charger for internal combustion engines. |
| 10/17/1990 | CN2063991U Ventilation fan |
| 10/17/1990 | CN2063990U Foldable hand-driven fan |
| 10/16/1990 | US4963076 Radial blower with resiliently mounted bearing holders |
| 10/16/1990 | US4962734 Electrically driven, circumferentially supported fan |
| 10/10/1990 | CN2063584U Steering device for ceiling fan |
| 10/10/1990 | CN1046026A Electric fan with water cooling |
| 09/30/1990 | CA2013512A1 Circumferential motor |
| 09/25/1990 | USRE33347 Air-driven ceiling fan |
| 09/25/1990 | US4959571 Axial-flow fan with tapered hub and duct |
| 09/19/1990 | CN2062386U Motorcycle with wind blower |
| 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 |
| 09/12/1990 | EP0386883A2 Ventilating fan for fire fighting |
| 09/12/1990 | CN2061985U Domestic blower |
| 09/11/1990 | US4955793 Turbopump and similar operating machine with sealing connection structure to the motor |
| 09/11/1990 | US4955585 Hydraulically driven fan system for water cooling tower |
| 09/05/1990 | EP0385298A2 Electric blower having improved return passage for discharged air flow |
| 08/29/1990 | EP0384052A1 A device for controlling the sweeping-angle of a fan |
| 08/29/1990 | CN2061222U Electric fan with simulated natural wind function |
| 08/29/1990 | CN1044975A Oscillation angle adjuster for electric fan |
| 08/22/1990 | CN2060827U Power saving centrifugal blower with electric motor installed in casing |
| 08/21/1990 | US4950932 Axial flow fan integral with electronically commutated motor |
| 08/14/1990 | US4949022 Solid state DC fan motor |
| 08/09/1990 | WO1990008880A1 Portable water driven high velocity fan |
| 08/08/1990 | EP0380793A1 Mechanically driven compressor for a combustion engine |
| 08/01/1990 | CN2059944U Explosion-proof axial-flow ventilator for coal mine |
| 07/25/1990 | CN2059689U Fan |
| 07/18/1990 | EP0377643A1 Mechanical drive for the charging blower of internal combustion engines. |
| 07/18/1990 | EP0377609A1 Mechanical drive of the charging blower of internal combustion engines. |
| 07/17/1990 | US4941437 Automotive radiator cooling system |