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| Number | Title | Issue Date |
| 7575410 | Electric air pump apparatus and evaporation fuel treatment system A self-opened type valve is opened by motor torque of an electric motor. Therefore, a diaphragm is not necessary for opening the valve, and downsizing of a valve drive apparatus for opening the valve is possible. Since the valve is assembled to the motor shaft of th... | 08/18/2009 |
| 7328748 | Thermal actuated plunger A downhole plunger for a gas/oil well comprises a valve to regulate fluid flow past the plunger and a thermal actuator to control the valve. The thermal actuator of the disclosed device enables the valve to open and close aperatures without relying on the physical i... | 02/12/2008 |
| 7322788 | Protection system for turbo machine and power generating equipment A limit switch 6 is placed on an end portion of the trip rod 4, which converts the mechanical deviation of the trip rod 4 into an electrical signal. The electrical signal from the limit switch 6 is transmitted to quick acting solenoid val... | 01/29/2008 |
| 7238000 | Pneumatic high speed motor with pressure activated speed governor A pneumatic high speed motor includes a stator housing, a rotor journalled in the stator housing, and a pressure air inlet passage. A speed governor for the motor includes a valve element that is shiftable between an open position and a closed position for controlli... | 07/03/2007 |
| 7186077 | Compressor, particularly in an exhaust gas turbocharger for an internal combustion engine In a compressor particularly of an exhaust gas turbocharger of an internal combustion engine having a compressor wheel rotatably supported in a compressor housing which includes a diffuser structure with an adjustable diffuser geometry comprising guide vanes pivotal... | 03/06/2007 |
| 7134834 | Flow compensation for turbine control valve test The present invention is a method of minimizing steam boiler pressure changes or turbine power changes during turbine control valve operational safety test stroking. The method of the present invention uses control valve positions as feedback into a compensation alg... | 11/14/2006 |
| 7114911 | Variable camber and stagger airfoil and method Aerodynamically efficient air flow management in axial flow-turbines is provided by utilizing a variable stagger and camber airfoil. In an exemplary embodiment of the invention, this is accomplished by providing a two-piece airfoil including a strut and a flap, each... | 10/03/2006 |
| 7096657 | Gas turbine engine electromechanical variable inlet guide vane actuation system An electromechanical inlet guide vane actuation system includes one or more electric motor driven actuators that are used to appropriately position the inlet guide vanes in a gas turbine engine. The actuation system includes a control circuit that supplies guide van... | 08/29/2006 |
| 7036318 | Gas turbine electric powerplant A gas turbine electric powerplant, preferably driven by an aeroderivative turbine engine of split shaft design. The gas turbine engine is coupled to a speed reducer, which is in turn coupled to an electric generator. An engine mount is provided that ensures that the... | 05/02/2006 |
| 6854953 | Speed governor The present invention provides a speed governor (5) suitable for use in a fluid driven down-hole tool (3). The speed governor comprises an actuator (7) operatively coupled to a motive fluid flow control valve (6). The actuator is and arra... | 02/15/2005 |
| 6602044 | Pump turbine, method of controlling thereof, and method of stopping thereof A pump turbine includes a runner connected to a generator motor, a water discharge controller for adjusting the quantity of water passing through the runner and a governor for detecting a rotational speed of the runner and controlling the water discharge ... | 08/05/2003 |
| 6533536 | Hydro-turbine runner A turbine installation comprising a turbine in combination with an electrical closed-loop control system. The turbine is disposed in a flow of water for producing electrical energy. The turbine includes a hollow hub and a plurality of runner blades pivota... | 03/18/2003 |
| 6422816 | Variable pitch propeller control system Maintenance requirements on a variable pitch propeller control system are minimized by eliminating the need for mechanical elements, such as a flyweight, mechanism in a secondary control for the variable pitch propeller. The system includes a secondary co... | 07/23/2002 |
| 6402477 | Adjustable blade turbines A turbine, adaptable to improve the survivability of fish present in water flowing therethrough, includes a hub and associated runner blades. Each blade comprises an inner edge and a distal outer edge, a leading edge and a trailing edge separated by a wat... | 06/11/2002 |
| 6341238 | Robust engine variable vane monitor logic A method of testing an actuation system for positioning an actuator, the actuation system including a primary electronic system, a secondary hydro-mechanical system is disclosed. The method includes the steps of measuring the actual position of the actuat... | 01/22/2002 |
| 6270309 | Low drag ducted Ram air turbine generator and cooling system A low drag ducted ram air turbine generator and cooling system is provided. The ducted ram air turbine generator and cooling system has reduced drag while extracting dynamic energy from the air stream during the complete range of intended flight operating... | 08/07/2001 |
| 6250877 | Steam turbine controller having method and apparatus for providing variable frequency regulation In a preferred embodiment, the invention relates to a steam turbine having a speed-loop droop governor with two load-frequency error gains (droops). The first gain (fast change) may be a conventional high gain that is used for power loads that have a cons... | 06/26/2001 |
| 6241464 | Governor mechanism for a rotary device A governor mechanism is mounted for rotation with a drive shaft about an axis, has one or more reaction nozzles for imparting rotational movement to the drive shaft, and one or more valve portions supported for radially directed sliding movement between f... | 06/05/2001 |
| 6210100 | Pump-turbine An upper reservoir-side conduit or a lower reservoir-side conduit is branched in the vicinity of pump-turbine ends and at least a first pump-turbine out of a plurality of pump-turbines which share the conduit portions located farther than the branch point... | 04/03/2001 |
| 6070405 | Method for controlling the rotational speed of a turbine during load shedding A control system for controlling the rotational speed of a turbine for producing electrical power and a method for controlling the rotational speed of a turbine during load shedding include a control structure. The control structure can be connected to an... | 06/06/2000 |
| 6042331 | Pump-turbine An upper reservoir-side conduit or a lower reservoir-side conduit is branched in the vicinity of pump-turbine ends and at least a first pump-turbine out of a plurality of pump-turbines which share the conduit portions located farther than the branch point... | 03/28/2000 |
| 6027305 | Method and apparatus for reducing high-cycle fatigue and suppressing noise in rotating machinery A stator apparatus for mounting upstream of an intake to a rotating machine which blows pressurized air, or other media, from discharge orifices at a pressure and velocity to minimize velocity defects or turbulence in the wake of the stator prior to the p... | 02/22/2000 |
| 5984625 | Actuator bandwidth and rate limit reduction for control of compressor rotating stall A compressor is disclosed having a characteristic modifier, such as air injection, adapted to modify an operating characteristic of the compressor in order to reduce the bandwidth and rate limit requirements of the compressor. The compressor includes an a... | 11/16/1999 |
| 5967742 | Method and apparatus for preventing surge while taking a turbocompressor off-line from a parallel configuration The operation of quickly taking a turbocompressor off-line from a parallel configuration, of a gas pipeline compressor station, may encounter increased mechanical action (in particular, vibration) upon recycle piping and the additional risk of compressor ... | 10/19/1999 |
| 5954474 | Hydro-turbine runner A turbine, disposed in water flowing therethrough, includes a hub and associated runner blades. Each blade comprises an inner surface and a distal outer surface, a leading edge and a trailing edge separated by a water directing surface. Each blade is rota... | 09/21/1999 |
| 5947679 | Adjustable blade turbines A turbine, adaptable to improve the survivability of fish present in water flowing therethrough, includes a hub and associated runner blades. Each blade comprises an inner edge and a distal outer edge, a leading edge and a trailing edge separated by a wat... | 09/07/1999 |
| 5947680 | Turbomachinery with variable-angle fluid guiding vanes Driven turbomachinery for use in centrifugal and mixed flow pump overcomes operational for overcoming difficulties, such as flow separation and generation of surge at low flow rates, often encountered in similar machines of the conventional design. The tu... | 09/07/1999 |
| 5938401 | Automatic engine hydro-mechanical control unit preflight test A method of testing an actuation system for positioning an inlet guide vane, the actuation system including a primary electronic system, a secondary hydro-mechanical system is disclosed. The method includes the steps of controlling the position of the inl... | 08/17/1999 |
| 5834853 | Sea/river powered power plant A sea/river powered power plant that harnesses the movement of sea waves and river currents to convert them into useful electrical energy. The power plant contains turbines which rotate about a horizontal axis as the waves and currents strike a lower port... | 11/10/1998 |
| 5789822 | Speed control system for a prime mover An electronic governor (34) to control a main steam valve (22) of a steam turbine (10) for controlling the rotational speed of a main drive shaft (16). The electronic governor (34) has a housing (36) in which an electric generator (104) is mounted to supp... | 08/04/1998 |
| 5754446 | Method and apparatus for optimizing performance of a kaplan turbine A method and system for optimizing performance of a Kaplan turbine power generating unit are provided wherein an optimal "N-dimensional" virtual cam is populated with gate and blade positional settings producing maximum power output for a set of N operati... | 05/19/1998 |
| 5752383 | Air turbine flow restrictor An air turbine flow restrictor comprises a sensor for determining the rotational velocity of the turbine wheel. In response to a detected speed above a predetermined threshold, particles are injected into the inlet airstream. In one embodiment of the inve... | 05/19/1998 |
| 5630698 | Converter for providing a liquid at a measurement pressure corresponding to a rotational speed A converter assembly for providing a liquid in a measuring line includes a stationary housing and a component being rigidly connected to the housing. A journal is slidingly supported in the stationary housing and defines a gap disposed between the compone... | 05/20/1997 |
| 5609465 | Method and apparatus for overspeed prevention using open-loop response A method and apparatus are disclosed for controlling the rotational speed of gas and steam turbines, and hot gas expanders, with each of these drivers driving a rotational load by way of a shaft. To accomplish this control technique, it is necessary to ea... | 03/11/1997 |
| 5561830 | Method of producing a sintered carbonitride alloy for fine milling According to the invention there now is provided a method of producing a sintered titanium based carbonitride alloy with 325 weight-% binder phase with extremely good properties at extremely fine machining with high cutting speeds and low feeds. The metho... | 10/01/1996 |
| 5553995 | Method of driving a turbine in rotation by means of a jet device A turbine device and a method of driving the turbine device are disclosed. The turbine device includes an admission channel, a turbine, and an injection channel. The turbine device may also include a regulator. The turbine is driven by injecting a primary... | 09/10/1996 |
| 5553997 | Control method and apparatus for a centrifugal chiller using a variable speed impeller motor drive A method of controlling the operation of a centrifugal compressor in a water chiller system. The compressor's capacity is variable by modulating its speed of rotation or by modulating its inlet guide vane's position. The water chiller includes an evaporat... | 09/10/1996 |
| 5421702 | Lubricant pump for a turbine A lubricant pump (24) for supplying pressurized lubricant to the main bearings (14) of a drive shaft (12) for a steam turbine (10) as shown in FIG. 1. A lubricant pump (24) is positioned between a governor (18) and an adjacent bearing (14) with the gover... | 06/06/1995 |
| 5295783 | System and method for regulating the speed of a steam turbine by controlling the turbine valve rack actuator A system and method for regulating the speed of a steam turbine by operating a steam valve rack assembly to adjust the flow of steam to the turbine by controlling the position of the turbine valve rack actuator in response to high pressure oil fed, reacti... | 03/22/1994 |
| 5020968 | System for controlling the rotating speed of a pneumatically driven spindle A rotating speed control system for a pneumatically driven spindle used in a machine tool, comprises a spindle possessing a male-threaded part, a turbine mounted on the spindle by a nut with a convexo-concave portion being formed in one face thereof, a ca... | 06/04/1991 |
