Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 8092147 | Turbine for power generation in a drill string The invention is directed to a turbine (3) for generating power in a drill string (2), including a turbine rotor (10) drivable by a fluid and a bypass device having a first bypass channel bypassing the turbine rotor (10). For varying the ... | 01/10/2012 |
| 7293954 | Centrifugal compressor for turbo chiller, turbo chiller, and control method therefor A turbo chiller that can accurately determine the existence of surging occurring in a centrifugal compressor is provided. In a centrifugal compressor of a turbo chiller, which includes an impeller for compressing refrigerant, a resistance temperature sensor for dete... | 11/13/2007 |
| 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 |
| 6981842 | Bleed valve system A bleed valve for use in a gas turbine engine is provided; the bleed valve may be used to relieve air pressure from a compressor stage of the engine. At normal pressure and when the engine is off, the bleed valve is in the open position. However once the engine star... | 01/03/2006 |
| 6957945 | System to control axial thrust loads for steam turbines Apparatus (10) controls net thrust in a steam turbine (T) in response to changes in the operating condition of the turbine. The turbine includes a thrust bearing (B) positioned between low and intermediate pressure sections (LP, IP) of the turbine and a high ... | 10/25/2005 |
| 6926490 | Self-actuated bearing cooling flow shut-off valve A compressor assembly comprises a compressor having a rotor comprising a shaft with fan blades for compressing air. An air bearing serves to cool the shaft of the rotor. A compressor air inlet receives air for the fan blades, which is then exhausted from the fan bla... | 08/09/2005 |
| 6921244 | Bleed valve system Disclosed is a system for operating gas turbine engine bleed valves in response to pressure values within the engine, wherein the engine pressure values are sensed electronically and routed to a programmable logic device, and wherein the programmable logic device co... | 07/26/2005 |
| 6793456 | Turbo-compressor and capacity control method thereof A turbo-compressor comprises a compressor main body for compressing an operation fluid, an inlet guide vane apparatus being provided on a suction side of the compressor main body and having guide vanes, and a blow-off valve being provided in a discharge said compres... | 09/21/2004 |
| 6503048 | Method and apparatus for estimating flow in compressors with sidestreams Accurate and effective antisurge control for turbocompressor stages is augmented by measuring the flow rate of fluid entering or leaving the stage of compression. On the other hand, turbocompressors with sidestreams, such as ethylene, propylene, and propa... | 01/07/2003 |
| 6390772 | Axial flow turbine air economizer Nozzle control apparatus for an axial flow air turbine having an inlet nozzle for air entering the turbine and an associated turbine inlet housing for channeling air flowing to the inlet nozzle for at least partially blocking air flow from the turbine inl... | 05/21/2002 |
| 6164901 | Method and device for operating turbocompressors with a plurality of controllers that interfere one with each other A process for operating multistage turbocompressors (2, 22, 42) with a plurality of controllers (15, 35, 55) which interact one with each other, in which each compressor stage has anti-surge control valves (5, 25, 45) of its own, which recycle into the su... | 12/26/2000 |
| 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 |
| 5464318 | Control system for extraction and injection of steam from and into a turbine The present invention relates to a control system for controlling injection and extraction of steam in a steam turbine (1), the same valves (5,6) being used both for injection of steam to the turbine (1) and for extraction of steam from the turbine (1) . ... | 11/07/1995 |
| 5456574 | Centrifugal pump with starting stage A novel centrifugal pumping system is disclosed for supplying fuel to aircraft gas turbines. The system has a common rotor with two different sets of impeller blades on opposite sides. A regenerative/liquid-ring starting pump is located on one side of the... | 10/10/1995 |
| 5242263 | Device for the control of anti-surge of a compressor An anti-surge valve (11) equipped with a servomotor and connected between the outlet of the compressor (12) and its inlet, the servomotor being controlled from a regulating system (13) which receives at the input a parameter (m) representing the flow of t... | 09/07/1993 |
| 4921399 | Gas pipeline temperature control In a compressor station for boosting the pressure of gas stream being transported in a pipeline wherein the act of recompressing the gas stream to a desired pressure results in a gas temperature sufficiently high to stimulate cracking activity in the pipe... | 05/01/1990 |
| 4917570 | Turbine shaft axial load protection system An axial thrust limiting system for a steam turbine including a rotor having a shaft, the turbine containing a plurality of chambers each defining a pressure zone containing a fluid which, during operation of the turbine, is at a pressure which influences... | 04/17/1990 |
| 4674951 | Ring structure and compressor blow-off arrangement comprising said ring A ring of an annular valve assembly is movable in the direction of its longitudinal axis and is intended for an axial compressor blow-off arrangement. The ring takes the form of an axially orientated channel-section member having a first annular skin of c... | 06/23/1987 |
| 4627789 | Apparatus method for calibrating and setting compressor air bleed valve schedules A device is provided for indicating a fluid pressure and flow reversal. The device comprises a float tube in which a float is slideably disposed. An accumulator is disposed in communication with the float tube. The float tube is further in communication w... | 12/09/1986 |
| 4530640 | Method and apparatus for wastegating turbocharged engine with divided exhaust system A turbocharged engine is provided with a turbine housing which has an inlet, an outlet located radially interiorally from the inlet, a centrally located turbine wheel cavity, and an internal scroll passageway which diminishes in cross section as it leads ... | 07/23/1985 |
| 4487548 | Centrifugal main fuel pump having starting element A centrifugal main fuel pump (10') for a gas turbine engine has a housing (12') in which a centrifugal impeller (16') is mounted for rotation. The centrifugal impeller includes a disc (24') which carries starting flow impeller elements (34) which are posi... | 12/11/1984 |
| 4460310 | Diffuser throttle ring control A centrifugal vapor compressor having a two-position, pressure controlled diffuser throttle ring is disclosed. The throttle ring is positively maintained in a minimum or a maximum throttling position by supplying either a relatively low pressure or a rela... | 07/17/1984 |
| 4415307 | Temperature regulation of air cycle refrigeration systems Temperature regulation of an air cycle refrigeration system is achieved by selectively adjusting the turbine stator geometry in response to the temperature of turbine airflow at a desired location. Such adjustment in stator geometry includes the selective... | 11/15/1983 |
| 4413946 | Vented compressor inlet guide To provide reduction in temporary conditions of excess load on the thrust bearing, a labyrinth positioned contiguous to a leakage aperture in the high pressure side of a single stage overhung compressor rotor affords controlled leakage to a venting circui... | 11/08/1983 |
| 4396345 | Unloader valve having bypass valving means The invention comprises incorporating in the wall of a typical unloader valve for a compressor, a normally-closed, pressure-responsive valve for admitting product compressed air therethrough, into the valve chamber, for re-circulation of the admitted air ... | 08/02/1983 |
| 4390318 | Apparatus for operating shut-off members in gas turbine engines, particularly in turbojet engines An arrangement for operating shut-off members in gas turbine engines, particularly turbojet engines. Circumferential rotation of an actuating ring is converted into axial opening or closing movement by transmission element. These transmission elements are... | 06/28/1983 |
| 4273508 | Method for automatic control of power plant and power plant of compressor station of gas pipeline system, wherein said method is effected The proposed method for automatic control of a power plant is as follows. A control signal of the electric generator's electric load is applied to a first control element which controls the flow of gas supplied from the gas line to the high-pressure secti... | 06/16/1981 |
| 4169355 | Turbocharger wastegate valve The disclosure illustrates a turbocharger wastegate valve comprising a cylindrical chamber connected through a radial inlet to the gas stream upstream of the turbine. High pressure air is selectively directed across the inlet through a nozzle to prevent o... | 10/02/1979 |
| 4127356 | Wind motor machine An impeller having an axle with radial vanes is mounted within a housing. The housing includes a funnel to direct a large amount of wind into the impeller. Air fins on top of the housing maintain the funnel pointed into the wind. A flap upon the top of th... | 11/28/1978 |
| 4120603 | Jet flap controlled fuel pump An inducer for a high speed centrifugal pump includes a shaft located upstream of the inlet eye of the centrifugal pump concentrically within an inlet bore; and further includes a plurality of axial blades on an inducer shaft for producing a boost pressur... | 10/17/1978 |
| 4102595 | Bleed valve control system The opening of variable bleed doors is scheduled as a function of both booster and compressor speed so as to better maintain the desired booster stall margin and increase efficiency during certain periods of engine operation. The schedule based on core sp... | 07/25/1978 |
| 4097183 | Method of and apparatus for controlling by-pass valve Provided is a method of controlling a by-pass valve in which the discharge valve is opened or closed in an interlocked relation woth a turbine flow regulating means such as wicket gates of a water-turbine in order to bypass a stream of water with respect ... | 06/27/1978 |
| 3996964 | Control apparatus particularly for a plurality of compressor bleed valves of a gas turbine engine Control apparatus for programmed control of a plurality of gas turbine engine compressor air bleed valves in response to a plurality of control input signals representing engine operating conditions including variable conditions related to engine power ou... | 12/14/1976 |
| 3994617 | Control apparatus particularly for a plurality of compressor bleed valves of a gas turbine engine Control apparatus for programmed control of a plurality of gas turbine engine compressor air bleed valves in response to a plurality of control input signals representing engine operating conditions including variable conditions related to engine power ou... | 11/30/1976 |
| 3972641 | Compressor bleed sensor and control for turbine type power plants This invention relates to an improved surge control for a gas turbine type of power plant that bleeds the compressor to avoid surge and serves to isolate the effect that the engine area change has on the compressor discharge pressure rate signal to effect... | 08/03/1976 |
| 3964257 | Device for boosting and bleeding a gas turbine engine A boost and bleed device for a gas turbine engine comprising a primary duct hrough which a primary gas flow passes, and containing a low-pressure compressor and a high-pressure compressor which are independent of one another, and a secondary duct through w... | 06/22/1976 |
