Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 8186935 | Steam turbine having exhaust enthalpic condition control and related method A steam turbine includes a casing including a steam inlet and an exhaust, the casing enclosing operative structure of the steam turbine; a valve controlling introduction of a steam flow at a location of the steam turbine to impact an enthalpic condition of steam exi... | 05/29/2012 |
| 7415376 | Valve tester control enhancements A valve tester system is disclosed that comprises a valve tester assembly for rotating a valve stem of a valve. The valve tester assembly may include a support, a rotation element mounted on the support for rotating a valve during a rotation event, a control element... | 08/19/2008 |
| 7367457 | Device for the separation of non-magnetizable metals and ferrous components from a solid mixture and method for operating such device In an arrangement which including a motor-driven system for the separation of non-magnetisable metals, vibrations and resonances which generally are present in such arrangement, are eliminated. This is accomplished by utilizing a drum mounted on and rotating about a... | 05/06/2008 |
| 7331752 | Method of conversion of continuous medium flow energy and device for conversion of continuous medium flow energy A device and method for conversion of the energy of medium flows are provided. The proposed device and method ensure suppression of the vortex streams in the flow on the leg of its motion along the radially converging trajectories and concentration of the flow energ... | 02/19/2008 |
| 7295899 | Method and controller for setting a control element and a use of said controller For setting the position of a control element, a controller and method according to the invention provide for impressing a required temporal characteristic of the actuating signal onto a should-be value then using said should-be value as a time-variable signal for f... | 11/13/2007 |
| 7227321 | System and method for detecting back electromotive force with automatic pole calibration A system and method for determining the rotational speed of a motor, such as a three-phase disk drive motor, detects back electromotive force voltage generated during operation of the motor with an automatic pole calibration to minimize or eliminating variations in ... | 06/05/2007 |
| 7204320 | Active rotational balancing system for orbital sanders A system for active dynamic balancing of a rotating tool driven by a motor having a shaft supported by a first and second bearing on opposing sides of the motor includes an acceleration sensing assembly configured to sense radial accelerations on the shaft producing... | 04/17/2007 |
| 7201556 | Displacement casing A rotor system is provided whereby a rotary assembly such as a fan blade combination in a jet engine is brought into rub contact with a casing such that sensors detect vibration. The casing is then retreated in order to open the gap to a desired value for engine per... | 04/10/2007 |
| 7179054 | Flow reversal system for axial fan An axial fan has a blade support wheel coupled to a drive shaft. A disk is positioned about the drive shaft adjacent the wheel. A torsion spring is coupled to the wheel and to the disk. When the torsion spring is in tension, the disk is poised for a relative rotatio... | 02/20/2007 |
| 7104342 | Active rotational balancing system for orbital sanders A system for active dynamic balancing of a rotating tool driven by a motor having a shaft supported by a first and second bearing on opposing sides of the motor includes an acceleration sensing assembly configured to sense radial accelerations on the shaft producing... | 09/12/2006 |
| 7096669 | Method and apparatus for the prevention of critical process variable excursions in one or more turbomachines Many variables in processes such as those using turbocompressors and turbines must be limited or constrained. Limit control loops are provided for the purpose of limiting these variables. By using a combination of closed loop and open loop limit control schemes, exc... | 08/29/2006 |
| 7059820 | Noise control Methods, devices, and/or systems for controlling vibration and/or acoustic noise. An exemplary method senses noise and/or, for example, rotational speed of a rotating shaft, determines control parameters and actuates one or more actuators. An exemplary device includ... | 06/13/2006 |
| 7056082 | Four cycle wind implosion engine A wind energy machine has four rotor chambers formed by perpendicular walls. Each rotor chamber has an intake portion, a reversal portion, a parallel portion, and an exhaust portion. Air flow is reversed in each chamber for every 90 degrees of rotation, such that th... | 06/06/2006 |
| 7001140 | Centrifugal fan diffuser At least one embodiment of the present inventive technology focuses on a vaneless diffuser adapted for establishment extra-radially of a centrifugal fan, wherein the diffuser may effect an optimal transformation of velocity pressure into static pressure of a fluid (... | 02/21/2006 |
| 7000848 | Circuit configuration for fan regulation A fan regulation circuit configuration includes an input receiving an input voltage (proportional to fan current and forms a first comparison voltage), a low-pass filter (filters input voltage and a filter output voltage is tapped off as second comparison voltage), ... | 02/21/2006 |
| 6939100 | Method and apparatus for controlling steam turbine inlet flow to limit shell and rotor thermal stress In a method of controlling steam flow through a steam turbine having a turbine rotor, a maximum heat transfer rate is determined based on thermal stress calculations in the turbine rotor. A maximum steam flow rate can be calculated based on the maximum heat transfer... | 09/06/2005 |
| 6837681 | Wind power plant with a particle sensor Wind power installations using more modern technology have long been known. Such wind power installations have rotors comprising at least one or more rotor blades. The rotors and accordingly the rotor blades carried thereby of wind power installations are subjected ... | 01/04/2005 |
| 6776584 | Method for determining a centrifugal pump operating state without using traditional measurement sensors A method for determining whether a centrifugal pump is operating within its normal flow operating range includes the steps: of determining a motor torque/TDH relationship over a range of speeds for a minimum flow rate in order to obtain a minimum flow operating rang... | 08/17/2004 |
| 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 |
| 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 |
| 6276894 | Method and device for drawing condensate off from compressed-gas systems A method for draining condensate off a compressed-gas system that traps condensate that collects during operation of the compressed-gas system, draws off collected condensate through an outlet, connects a trap volume and a purging device to the outlet, co... | 08/21/2001 |
| 6210099 | Moving-weight, dynamic balancing apparatus for a rotary machine, in particular for industrial fans A moving-weight, dynamic balancing apparatus for a rotary machine, in particular an industrial fan, having a rotary shaft, and at least one rotor carried by the rotary shaft and provided with main rotor bearings to allow rotary movement thereof. The balan... | 04/03/2001 |
| 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 |
| 6168575 | Method and apparatus for controlling intraocular pressure The present invention comprises a miniature pump which can be implanted in the eye for controllably removing excess fluid from the eye to treat glaucoma. The pump, in accordance with the inventive method, may be placed beneath the conjunctiva and/or extra... | 01/02/2001 |
| 6152684 | Method for operation of hydraulic turbine A process for operating a hydraulic machine, especially a hydro-turbine, includes the step of detecting an actual machine state during operation of the machine by ascertaining operating data. The ascertained operating data includes flow through the turbin... | 11/28/2000 |
| 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 |
| 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 |
| 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 |
| 5951240 | Method and apparatus for improving antisurge control of turbocompressors by reducing control valve response time The stroking speed of an antisurge control valve is impeded by the combined damping effects of signal dead time and the inherent lag of ancillary pneumatic components within a primary control loop. Furthermore, as control valve actuator size increases, th... | 09/14/1999 |
| 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 |
| 5586857 | Rotating stall prevention system for compressor A compressor has inlet guide vanes, rotor blades and stator blades. To prevent rotating stall, baffle vanes 5 capable of having their angles varied are installed upstream of the inlet guide vanes, actuators to vary the angles of baffle vanes are coupled t... | 12/24/1996 |
| 5209631 | Arrangement for flooding high speed vacuum pumps The invention describes an arrangement for optimum flooding of high speed vacuum pumps. The actuation of the flood valve (6) is controlled by the forces, which, among other things, are exerted upon the rotor by the flooding process. These forces are deter... | 05/11/1993 |
| 5192464 | Evaporative cooler Improvements to an evaporative cooler having a direct drive fan include mutual adjustment of motor speed and fan blade pitch, a simplified, clog resistant water distribution system, a fan shroud creating minimal air flow noise, and a fouling sensor in the... | 03/09/1993 |
| 5178513 | Turbine nozzle phasing device Turbine nozzle phasing device for controlling a flow of gasses to a plurality of nozzles in response to a control signal. The turbine nozzle phasing device includes a housing having a lower portion which includes a first plenum for receiving the flow of h... | 01/12/1993 |
| 5145314 | Low drag pitot pump and method of operating same A method of operating a pitot pump that pressurizes a first fluid of a first viscosity and first density wherein the pump includes a rotatable housing and a stationary probe disposed within the housing includes the steps of providing a source of a second ... | 09/08/1992 |
| 4992021 | Side channel blower A side channel blower, preferably for burners for cleaning soot particle filters mounted in exhaust gas lines of vehicles by burning off, is shown, in which a chamber housing (6) with a chamber (5) is arranged on the air discharge side, wherein air flows ... | 02/12/1991 |
| 4728254 | Method and apparatus for controlling a steam turbine of a power station unit The invention relates to a method (and an apparatus) for controlling a steam turbine of a power station unit that includes a steam turbine and a steam generator, with the output signal of the turbine controller acting on the adjusting mechanism of the tur... | 03/01/1988 |
| 4688986 | Bulb turbine emergency counterweight system A fluid container associated with the wicket gate operating ring to receive fluid from a source so as to add an emergency counterweight to the gate operating ring upon failure of the gate operating ring servomotors.... | 08/25/1987 |
| 4472105 | Rotary type pumping machine A rotary type pumping machine such as a pump turbine in a pumped storage hydro-electric plant, wherein, when the pumping operation of the runner of the machine is started, compressed air is introduced into the runner chamber to depress the water surface i... | 09/18/1984 |
| 4452585 | Combustion air blower surge control for a melting furnace Disclosed is a surge control method and apparatus for a combustion air blower used with a metal melting furnace which includes a variable restriction on the blower inlet regulated by a pressure sensing means near the blower outlet.... | 06/05/1984 |
