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| Number | Title | Issue Date |
| 7882691 | High to low pressure spool summing gearbox for accessory power extraction and electric start A turbine engine includes low and high pressure spools. A high power take-off shaft is coupled to the high spool. An auxiliary component, such as a generator, is configured to be driven by the high power take-off shaft at a first speed. The low spool, in part, drive... | 02/08/2011 |
| 7784260 | Shaft coupling A shaft coupling device to couple first and second shafts, said device comprising a fluid coupling having a first portion attached to the first shaft and a second portion attached to the second shaft wherein the device further comprises engagement means operable to ... | 08/31/2010 |
| 7698884 | Power transmission arrangement A power transmission arrangement comprises a first power transmission member connectable to a first main shaft of an engine. The arrangement also includes a second power transmission member connectable to a second main shaft of the engine and to a third power transm... | 04/20/2010 |
| 7690185 | System for driving accessory machines of a double-bodied turbine engine A system for driving first and second accessory machines of a double-bodied turbine engine with an LP shaft and an HP shaft is disclosed. The system includes a first power train disposed between the shaft of the HP rotor and the first machines, which mechanically dr... | 04/06/2010 |
| 7644572 | Compact lightweight turbine A turbine combustion chamber is provided with deflectors on the cold side generating vortices in a secondary gas flow into the chamber, thereby confining the flame front under variable operating conditions and cooling the chamber walls. The high-speed cantilever sha... | 01/12/2010 |
| 7552582 | More electric aircraft power transfer systems and methods A turbofan gas turbine propulsion engine includes a system to transfer power from the low pressure turbine to the high pressure turbine and/or extract additional load from the low pressure turbine during certain turbofan engine operational conditions. The systems in... | 06/30/2009 |
| 7434406 | Drive for using a direct driven generator to start a counter-rotating multi-spool gas turbine engine A drivetrain for a multi-spool counter rotating gas turbine engine may include a lay shaft for connecting a power turbine shaft of the engine with a gas generator shaft of the engine when the drivetrain is in engine start mode. In normal operation mode, an actuator ... | 10/14/2008 |
| 7246482 | Gas turbine engine bleed air power assist system and method A bleed air power assist system is coupled to a gas turbine engine that includes a high pressure turbine, a low pressure turbine, and an electrical generator driven by the high pressure turbine. The bleed air power assist system selectively bleeds air discharged fro... | 07/24/2007 |
| 7225607 | Gas turbine braking apparatus and method A device is provided which can serve one or more of the multiple functions of impeding rotation of a shaft de-coupled turbine rotor, selectively impeding rotation of a first spool of the engine, for example to permit a second spool to generate power for use in groun... | 06/05/2007 |
| 7185496 | Synchronizing stationary clutch of compression braking with a two spool gas turbine engine A synchronizing stationary clutch system for compression braking in a two spool gas turbine engine is provided by the present invention. The synchronizing stationary clutch system allows the two shafts of a two spool gas turbine engine to be reliably coupled at any ... | 03/06/2007 |
| 7111462 | Onboard supplemental power system at varying high altitudes Systems and methods for supplementing a power system to achieve consistent operation at varying altitudes are disclosed herein. A hybrid power system comprising a single power source driving multiple generators may implement a power recovery turbine to drive a super... | 09/26/2006 |
| 7093450 | Method for operating a compressor In a method of operating a compressor, a gaseous medium is compressed in a first compressor stage. The partially compressed medium is sent from the first compressor stage into an intermediate cooler where it is cooled before being directed into the second compressor... | 08/22/2006 |
| 7089728 | Single-piece turbine rotor and pinion gear and manufacturing technique for same A power transfer assembly comprises a power turbine constructed of a nickel alloy; a gear shaft constructed of a low-carbon carburized gear material; and a transition portion between and welded to each of the power turbine and gear shaft. The nickel alloy may be wel... | 08/15/2006 |
| 7089744 | Onboard supplemental power system at varying high altitudes Systems and methods for supplementing a power system to achieve consistent operation at varying altitudes are disclosed herein. A hybrid power system comprising a single power source driving multiple generators may implement a power recovery turbine to drive a super... | 08/15/2006 |
| 7065954 | Turbine, particularly useful for small aircraft A turbine includes a combustion chamber with deflectors generating vortices in a secondary gas flow into the combustion chamber, thereby confining the flame front from penetrating into the cold region of the chamber under variable operating conditions, simplifying c... | 06/27/2006 |
| 6672049 | Emergency device for relighting a windmilling turbojet An emergency device for relighting a windmilling turbojet, the jet comprising a fan driven by a low-pressure turbine via a first shaft and a compressor driven by a high-pressure turbine via a second shaft disposed coaxially around the first shaft, a diffe... | 01/06/2004 |
| 6604354 | Combined cycle power plant A combined cycle power plant generally comprises a gas turbine power facility, a heat recovery steam generator, a steam turbine power facility, and an existing boiler. The power generation plant further comprises a system for introducing steam, which is g... | 08/12/2003 |
| 6467725 | Electrical generator an aero-engine including such a generator, and an aircraft including such a generator An aero-engine is provided with an integrated switched reluctance generator permanently connected to the low speed spool of the engine such that "windmilling" of the engine enables the generator to be turned if the engine suffers a flame out. The generato... | 10/22/2002 |
| 5845483 | Windmill engine starting system with fluid driven motor and pump An engine starting system is provided for an aircraft gas turbine engine having a fan, compressor, combustor, high pressure turbine joined to the compressor by a core shaft, and a low pressure turbine joined to the fan by a fan shaft. A fluid assist pump ... | 12/08/1998 |
| 5694765 | Shaft power transfer in gas turbine engines with machines operable as generators or motors A multispool gas turbine engine for an aircraft application includes a transmission system which is operative to transfer power between relatively rotatable engine spools. In a first mode the transmission system is operative to transfer power from the eng... | 12/09/1997 |
| 5553448 | Intercooled gas turbine engine A gas turbine engine having improved output horsepower and a method of achieving it. The engine has, in order, a low pressure compressor, a high pressure compressor, a combustor, a high pressure turbine and a low pressure turbine. The high pressure turbin... | 09/10/1996 |
| 5457633 | Apparatus for limiting horsepower output of an engine and method of operating same A horsepower limiting engine control limits the maximum engine horsepower output during operating conditions that might result in torque outputs that are greater than the transmission component ratings. The control includes an electronic controller connec... | 10/10/1995 |
| 5103631 | Differential gear assembly A differential gear assembly which is suitable for providing a power off-take from a gas turbine engine, comprises first and second power input gears which drive a plurality of idler gears rotatably mounted on a common cage structure. The idler gears are ... | 04/14/1992 |
| 4912921 | Low speed spool emergency power extraction system An emergency on board power source (28) for jet aircraft having high (22) and low speed (14) spools is disclosed for operation above altitudes where auxiliary power units (14) are operational. A power takeoff (56) is provided from the low speed spool of t... | 04/03/1990 |
| 4876849 | Gas turbine propulsion unit with a gas generator In a gas generator of a gas turbine, the turbine is provided with more stages than aerodynamically necessary for reducing the turbine rotational speed. As a result thereof, the stresses of the turbine rotor are reduced, the latter can be made of ceramic m... | 10/31/1989 |
| 4700542 | Internal combustion engines and methods of operation An internal combustion engine apparatus and method of operation includes the monitoring of the exhaust gas temperature and air-fuel ratio on a continuing basis. The exhaust gas temperature is compared to a stored value and compression of the input air is ... | 10/20/1987 |
| 4674276 | Inertial speed control coupling for a gas turbine engine An inertial coupling is provided for substantially preventing rotational speed variations of a free power turbine in a multiple shaft gas turbine engine in response to a transient load condition. The inertial coupling comprises a gear assembly having firs... | 06/23/1987 |
| 4602478 | Marine gas turbine power transmission A marine gas turbine engine including a fluid coupling between its low pressure turbine and power turbine. During forward drive the fluid coupling is drained so that the exhaust gases from the low pressure turbine drive the power drive in a first directio... | 07/29/1986 |
| 4376614 | Propeller brake for a turbo-prop engine A propeller brake for a twin spool turbo-prop engine which permits the propeller to be locked in a stationary position with the engine running is disclosed. The propeller brake has a hydraulically actuated friction brake and hydraulically actuated locking... | 03/15/1983 |
| 4326375 | Gas turbine-transmission plant In an automotive gas turbine power plant including at least one power turbine rotor and a further turbine rotor driving the compressor of the plant, the latter rotor is undersized with respect to the power consumption by the compressor during normal opera... | 04/27/1982 |
| 4282709 | Gas turbine-transmission plant In a gas turbine power plant including at least three turbine rotors operating upon independent shafts, one rotor is designed to drive the compressor, one is designed to produce the main part of the power output and the third rotor is adapted to aid the t... | 08/11/1981 |
| 4209979 | Gas turbine engine braking and method A free turbine engine for driving ground vehicles with various deceleration or braking actions including power feedback braking wherein the turbine compressor is selectively interconnected with the power output shaft only in such a manner whereby compress... | 07/01/1980 |
| 4197699 | Free turbine type gas turbine engine with variable free turbine guide vane control system A gas turbine engine and method and control therefor particularly useful as the power plant for a ground vehicle. The gas turbine engine is of the free turbine type, and employs variable guide vanes to control the free turbine output. The guide vane contr... | 04/15/1980 |
| 4195472 | Gas turbine with forward and reverse marine drive A gas turbine engine drive for a marine propeller having a forward and reverse drive transmission having controls operative during engine operation in a braking neutral position to decrease engine inertia and to brake the input and engine and also the out... | 04/01/1980 |
| 4193262 | Gas turbine engines A gas turbine engine power plant comprises a main gas turbine engine terminating in a jet pipe in which a free turbine is mounted. The free turbine is adapted to drive an auxiliary compressor. Means are provided such that a portion of the gas turbine engi... | 03/18/1980 |
| 4118927 | Gas turbine power plant An automotive power plant includes three turbine rotors, of which one forms a spool together with the compressor, and the other two rotors are interconnected by a gearing. The first turbine rotor is undersized, and cannot provide the necessary power for d... | 10/10/1978 |
| 4081955 | Regulating systems for two-shaft gas-turbine engine The disclosed regulating system is intended for incorporation in two-shaft gas-turbine engine for a road vehicle, wherein a hydraulically controlled torque-transmitting device is interposed between the respective shafts of the turbocompressor and of the p... | 04/04/1978 |
| 4064690 | Gas turbine power plant The efficiency and the power output of a gas turbine power plant, to a large extent, depend upon the turbine inlet temperature (TIT). The strength of conventional metallic materials puts an upper limit to the TIT. Ceramic materials will withstand much hig... | 12/27/1977 |
| 4062185 | Method and apparatus for windmill starts in gas turbine engines A hydraulic pump and drive system is interconnected between the fan and compressor rotor of a turbofan engine such that the windmill speed of the core rotor can be boosted to a speed sufficient to allow a significantly increased in-flight start envelope b... | 12/13/1977 |
| 4051679 | Marine propulsion plant with reversible propeller shaft connected thereto When reversing a marine power plant, due consideration must be given to the fact that the inertia of the ship will continue to force the ship through the water during a moment of time after the shut down of the prime mover, with the propeller then acting ... | 10/04/1977 |
