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| Number | Title | Issue Date |
| 7326027 | Devices and methods of operation thereof for providing stable flow for centrifugal compressors Centrifugal compressor flow stabilizing devices and methods of operation thereof are disclosed that act upon the flow field discharging from the impeller of a centrifugal compressor and modify the flow field ahead of the diffuser vanes such that flow conditions cont... | 02/05/2008 |
| 7210895 | Turbo compressor and method of operating the turbo compressor A turbo-compressor being driven by an electric motor has an inlet guide vane and a blow-off valve. The surge limit line of the compressor is amended depending upon seasonal changes of temperature and pressure of a working gas to be sucked into the compressor. Upon t... | 05/01/2007 |
| 7111461 | System and method for testing a rotary flow device A diagnostic system and method for testing the operation of a rotary flow device, such as a turbine or compressor of a turbocharger with a variable-geometry mechanism, such as adjustable vanes, is provided. The system includes a flow generator configured to provide ... | 09/26/2006 |
| 7074008 | Small-sized hydroelectric generator A rotator with an impeller and a stator generating an induced voltage are arranged in a casing. The tap water flowing flows through a main passage, which has a first jet orifice facing the impeller, and rotates the impeller. A bypass running from the inflow port and... | 07/11/2006 |
| 7069728 | Multi-position BOV actuator A multi-position pressurized fluid actuator is mounted for movement in a casing. The actuator includes at least one selectively openable opening at a location corresponding to an intermediate position through which pressurized fluid can be selectively bled from the ... | 07/04/2006 |
| 7055316 | Fluid coupling for mobile equipment In an assembly including a diesel engine, a fluid coupling connected to the flywheel of the diesel engine, a comminuting machine and a conveyor for feeding the comminuting machine, a fluid coupling module is common to various output power train assemblies. Slip spee... | 06/06/2006 |
| 6602046 | Diffusor without any pulsation of the shock boundary layer, and a method for suppressing the shock boundary layer pulsation in diffusors A diffuser for slowing down a fluid and a method for operating a diffuser is described. A channel of the diffusor has an inlet with a smaller flow cross section than a flow cross section of an outlet and at least one opening for receiving an energizing fl... | 08/05/2003 |
| 6485255 | Cooling air flow control device for a gas turbine engine A cooling air flow control device for a gas turbine engine, the cooling air flow control device comprising a component, a cooling passage defined within the component and a shaped memory metal valve, the shaped memory metal valve disposed in the cooling p... | 11/26/2002 |
| 6364602 | Method of air-flow measurement and active operating limit line management for compressor surge avoidance A transfer function between the inlet air-flow consumed by a Gas Turbine engine, and the engine parameters of speed, pressure ratio, and Inlet Guide Vane (IGV) angle is described. An active compressor Operating Limit Line (OLL) management strategy that le... | 04/02/2002 |
| 6231306 | Control system for preventing compressor stall A control system for preventing a compressor stall in a gas turbine engine includes means for sensing an aerodynamic signal indicative of an impending stall condition. The weak stages of the compressor amplify an upstream disturbance originating in the lo... | 05/15/2001 |
| 6210103 | Rotary seal and/or bearing For an impeller pump, the seal/bearing unit has two rotor-stator pairs of tapered sleeves arranged back-to-back. The sleeves have a spiral groove, and convey barrier-liquid from an entry-mouth in an entry-chamber to an exit-mouth in an exit-chamber. Havin... | 04/03/2001 |
| 6036432 | Method and apparatus for protecting centrifugal compressors from rotating stall vibrations A fluid passage extends through the compressor casing from a point near the tip of the impeller to a transducer located externally of the compressor casing. Responsive to fluctuations of pressure sensed by the transducer indicative of rotating stall, the ... | 03/14/2000 |
| 6010303 | Apparatus and method of predicting aerodynamic and aeromechanical instabilities in turbofan engines A system and method is provided for generating a real-time signal indicative of an energy-type instability precursor in a turbofan engine. A sensor is positioned in a compressor portion of a turbofan engine for generating a real-time signal indicative of ... | 01/04/2000 |
| 5984626 | Evacuation means for pumps The present invention is for an evacuation system which preferrably in its entirety is connected to and operates at the outlet side of a pump. The evacuation system is connected to the socket 5 by the connector 9 and one of the valves 15 or 16. In the eva... | 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 |
| 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 |
| 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 |
| 5505587 | RAM air turbine generating apparatus A ram air turbine generator comprises a cylindrical external fairing having bypass exhaust orifices adjacent the leading end and external exhaust ports adjacent the aft end. A central flow guide is coaxially mounted and has a contoured outer surface space... | 04/09/1996 |
| 5220793 | Centrifugal pump fuel system A centrifugal pump has a rising characteristic at low flows, leading to pressure pulsations in the fuel system at low flow. A pressure difference regulating valve at the pump discharge has a frequency response such that the valve does not significantly mo... | 06/22/1993 |
| 5169286 | Variable capacity centrifugal water pump with movable pressure chamber formed by impeller This invention relates to an improvement on a centrifugal pump including: a casing defining an inlet path extending at the axial portion thereof, a turbine chamber communicating with the inlet path, and an outlet path disposed at the outer periphery porti... | 12/08/1992 |
| 5165845 | Controlling stall margin in a gas turbine engine during acceleration Stall margin in a gas turbine compressor is controlled during acceleration by synthesizing the thermal enlargement of critical compressor stages to synthesize the temporary increase in blade-case clearance during acceleration. The change in clearance is u... | 11/24/1992 |
| 5165844 | On-line stall margin adjustment in a gas turbine engine The deflection angle of a gas turbine stator is adjusted in proportion to the difference between two parameters computed from N2 and TT2 using the same function generator. One parameter is a reference adjustment under standard conditions for me... | 11/24/1992 |
| 4874288 | Inlet guide vane assembly An inlet guide vane assembly for a pump or a compressor having rotary blades. The guide vanes pivot in a controlled manner so that a portion of the vanes can be inserted into or withdrawn from the inlet passageway of the pump or the compressor by pivoting... | 10/17/1989 |
| 4869642 | Variable output vortex pump A high speed liquid vortex pump is fitted with a flexible tube in the discharge throat. The flow area of the flexible tube, and thus the pump output flow rate, is varied by surrounding the tube with a pressure modulated stream of the working fluid.... | 09/26/1989 |
| 4818177 | Centrifugal pump with integral suction valve An improved centrifugal pump is provided wherein a suction valve is integrally mounted within the impeller housing. The valve is shifted to the open position by hydraulic action and is preloaded by a spring to the closed position. Mechanical linkage is al... | 04/04/1989 |
| 4802817 | Centrifugal pump with self-regulating impeller discharge shutter A centrifugal pump having a self-regulating impeller discharge shutter which controls the size of flow passages from the pump impeller to the volute according to the flow demand on the pump. When the pump is operating at the design flow rate, the flow pas... | 02/07/1989 |
| 4764088 | Inlet guide vane assembly An inlet guide vane assembly for a pump or a compressor having rotary blades. The guide vanes are pivotably disposed so that a portion of the vanes can be inserted into or withdrawn from the inlet passageway of the pump or the compressor by pivoting the g... | 08/16/1988 |
| 4725194 | Self-regulating vertical axis windmill A self-regulating vertical axis windmill includes a wind actuable rotor and a plurality of baffle panels arranged around the outside of the rotor and pivotably mounted on vertical axes which are parallel to the axis of rotation of the rotor. The panels ar... | 02/16/1988 |
| 4629394 | Centrifugal pump having low flow diffuser A centrifugal main fuel pump (10') for a gas turbine engine has a housing (18') in which a centrifugal impeller (12') is mounted for rotation. The impeller discharges flow to a collector (20') and diffuser (22'). A low flow diffuser (26) has its inlet ope... | 12/16/1986 |
| 4502834 | Apparatus and method of throttling centrifugal pump liquid output A first control assembly is provided operative to supply gas from a supply of gas under pressure to the inlet of a centrifugal liquid pump at increasing and decreasing rates responsive to decreases and increases in the pressure of liquid discharge from th... | 03/05/1985 |
| 4470256 | Fluid compressor A fluid compressor including a rotating impeller and apparatus inhibiting fluid surging. The surge inhibiting apparatus includes a multitude of guide vanes circumscribing an inlet of the compressor. Movement of the guide vanes with respect to fluid flowin... | 09/11/1984 |
| 4452046 | System for the obtaining of energy by fluid flows resembling a natural cyclone or anti-cyclone A system for obtaining energy by means of fluid flows resembling those of a natural cyclone or anti-cyclone comprises a cyclonic conversion tower constituted by a group of convectors all situated round an axis toward which there are directed vortical memb... | 06/05/1984 |
| 4412780 | Rate initial pressure limiter A control system for a steam turbine is disclosed which is operative to protect the turbine from the effects of sudden changes in steam supply pressure, and in particular to protect the turbine from the effects of water induction such as occurs with a sud... | 11/01/1983 |
| 4378194 | Centrifugal compressor The efficiency of a centrifugal compressor is optomized over a wide range of flow rates by providing a diffuser which is a combination of fixed vanes and a movable wall member and which throttles the diffuser passage in accordance with compressor load.... | 03/29/1983 |
| 4284386 | High pressure pump A high pressure pump including a cylindrical rotor carried within a cylindrical cavity provided in a housing. Inlet and outlet ports are provided for transporting fluid to and from the cavity. A plurality of circumferentially spaced concave semicircular c... | 08/18/1981 |
| 4222751 | Liquid pump with gas separating means A gasoline pump includes a cyclone air separator by which air is removed from the gasoline being pumped. The air is vented to the atmosphere through a vent chamber. The cyclone separator includes a scavenging tube for capturing the air bubbles and is coup... | 09/16/1980 |
| 4214850 | Variable-capacity radial turbine A variable-capacity radial turbine is provided with a gas flow rate control plate which may throttle a restriction of a scroll-shaped channel of a turbine casing, through which flows the exhaust gases into a turbine impeller, so that the impeller may rota... | 07/29/1980 |
| 4205941 | Methods and apparatuses for avoiding surging phenomena in compressors The invention relates to a centrifugal compressor comprising an impeller not comprising distributor blading upstream of the impeller, a pressure probe and regulator means controlled by the probe and arranged to act on the flow conditions downstream or u... | 06/03/1980 |
| 4194360 | Power take-off arrangements The invention relates to a power take-off arrangement, particularly a power take-off arrangement from an engine, comprising a pump including a fixed casing defining an annular liquid chamber, a rotor with a vaned annulus rotatable in said annular liquid c... | 03/25/1980 |
| 4097184 | Pressure operated valve A pressure operated shut-off valve for controlling a pneumatic circuit for instance a supply passage of a pneumatic tool, in response to the motive air supply pressure. The valve comprises a valve body that is continuously biased in its closing direction ... | 06/27/1978 |
