Arrangements of bearings Lubricating

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FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F02Combustion engines F02CGAS-TURBINE PLANTS AIR INTAKES FOR JET-PROPULSION PLANTS CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS F02C7/00Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00 Air intakes for jet-propulsion plants

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F02C7/06Arrangements of bearings Lubricating

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Patents Grantslast 30 patents

Information Patent Grant
Turbine engine shaft plug
- Patent number 12,203,412
- Issue date Jan 21, 2025
- RTX Corporation
- Russell B. Witlicki
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Bearing configuration for a rotational equipment assembly
- Patent number 12,203,413
- Issue date Jan 21, 2025
- RTX Corporation
- Paul R. Hanrahan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Midshaft rating for turbomachine engines
- Patent number 12,203,377
- Issue date Jan 21, 2025
- General Electric Company
- Bhaskar Nanda Mondal
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
System and method for preloading a bearing
- Patent number 12,196,132
- Issue date Jan 14, 2025
- Pratt & Whitney Canada Corp.
- Patrice Remy
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Operating a gas turbine engine
- Patent number 12,196,133
- Issue date Jan 14, 2025
- Rolls-Royce PLC
- Andrea Minelli
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Reduced clearance interface between a fluid device and a rotating s...
- Patent number 12,188,551
- Issue date Jan 7, 2025
- RTX Corporation
- Paul R. Hanrahan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Electromagnetic turbine and fluid recirculation system
- Patent number 12,188,394
- Issue date Jan 7, 2025
- Michael Newgent
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Friction bearing, and method for lubricating and cooling a friction...
- Patent number 12,188,519
- Issue date Jan 7, 2025
- Rolls-Royce Deutschland Ltd & Co KG
- Stephan Uhkötter
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Gas turbine engine bearing and gearbox arrangement
- Patent number 12,188,407
- Issue date Jan 7, 2025
- RTX Corporation
- William G. Sheridan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Rotating carrier oil manifold
- Patent number 12,188,417
- Issue date Jan 7, 2025
- RTX Corporation
- David Allen Stachowiak
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Gearboxes for aircraft gas turbine engines
- Patent number 12,173,661
- Issue date Dec 24, 2024
- Rolls-Royce PLC
- Mark Spruce
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Aircraft turbomachine comprising means for priming the lubricating...
- Patent number 12,173,657
- Issue date Dec 24, 2024
- SAFRAN AIRCRAFT ENGINES
- Jérémy Edmond Fert
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Air/oil separator apparatus and method
- Patent number 12,168,239
- Issue date Dec 17, 2024
- GE AVIO S.R.L.
- Saypen Baraggia Au Yeung
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Conformal structure for a gas turbine engine
- Patent number 12,158,104
- Issue date Dec 3, 2024
- General Electric Company
- Constantinos Minas
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Rotating electric machine system, and combined power system equippe...
- Patent number 12,160,154
- Issue date Dec 3, 2024
- Honda Motor Co., Ltd.
- Naoki Ito
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Gas turbine engine with front support arrangement
- Patent number 12,158,110
- Issue date Dec 3, 2024
- RTX Corporation
- William G. Sheridan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Turbomachine comprising a rear integrated electrical machine
- Patent number 12,152,538
- Issue date Nov 26, 2024
- SAFRAN AIRCRAFT ENGINES
- Gilles Alain Marie Charier
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Methods and apparatus to maintain a state of a fluid in a system
- Patent number 12,146,441
- Issue date Nov 19, 2024
- General Electric Company
- Paul Mathew
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Methods and systems for operating an aircraft engine
- Patent number 12,140,075
- Issue date Nov 12, 2024
- Pratt & Whitney Canada Corp.
- Kasra Hamzehi
- G07 - CHECKING-DEVICES
Information Patent Grant
Midshaft rating for turbomachine engines
- Patent number 12,140,081
- Issue date Nov 12, 2024
- General Electric Company
- Narayanan Payyoor
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Heat management system for aircraft
- Patent number 12,129,797
- Issue date Oct 29, 2024
- Rolls-Royce PLC
- Mark P. Reid
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Fan module comprising improved sealing means for a lubricant chamber
- Patent number 12,116,901
- Issue date Oct 15, 2024
- SAFRAN AIRCRAFT ENGINES
- Julien Fabien Patrick Becoulet
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Mounting system for gearbox including corrugated bushing
- Patent number 12,116,936
- Issue date Oct 15, 2024
- Honeywell International Inc.
- Srinivas Chinthapally
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Turbomachine fan assembly comprising a roller bearing and a double-...
- Patent number 12,110,829
- Issue date Oct 8, 2024
- SAFRAN AIRCRAFT ENGINES
- François Marie Paul Marlin
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Assembly for aircraft turbine engine comprising an improved system...
- Patent number 12,110,826
- Issue date Oct 8, 2024
- SAFRAN AIRCRAFT ENGINES
- Mohammed-Lamine Boutaleb
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Epicyclic gear carrier assembly having an integrated lubrication pump
- Patent number 12,104,690
- Issue date Oct 1, 2024
- The Boeing Company
- John C. Walters
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Geared gas turbine engine with combined spray bar and scavenge comp...
- Patent number 12,104,527
- Issue date Oct 1, 2024
- RTX Corporation
- Joseph H. Polly
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Forced air supply system for engine cavity under negative-G force
- Patent number 12,104,528
- Issue date Oct 1, 2024
- Rolls-Royce North American Technologies Inc.
- Jacob Harral
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Power transmission system comprising an improved oil recovery channel
- Patent number 12,098,765
- Issue date Sep 24, 2024
- SAFRAN
- Juan-Luis Marcos Izquierdo
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Oil delivery system architecture
- Patent number 12,098,674
- Issue date Sep 24, 2024
- GE AVIO S.R.L.
- Nicolò Balbo
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

Patents Applicationslast 30 patents

Information Patent Application
BUFFER AIR ASSEMBLY FOR AN AIRCRAFT ENGINE
- Publication number 20250027422
- Publication date Jan 23, 2025
- Andrew E. Breault
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD OF MITIGATING VIBRATIONS IN A SEAL COMPONENT
- Publication number 20250027428
- Publication date Jan 23, 2025
- Pratt & Whitney Canada Corp.
- Ignatius THERATIL
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
GAS TURBINE ENGINE HAVING A HYDRAULIC FAN BRAKE
- Publication number 20250027427
- Publication date Jan 23, 2025
- GENERAL ELECTRIC COMPANY
- Jeffrey D. Rambo
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
AIR TURBINE STARTER WITH FLUID DAMPING ASSEMBLY
- Publication number 20250027534
- Publication date Jan 23, 2025
- UNISON INDUSTRIES, LLC
- Pallavi Tripathi
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
LUBRICATION SYSTEM FOR A TURBINE ENGINE
- Publication number 20250020070
- Publication date Jan 16, 2025
- GENERAL ELECTRIC COMPANY
- Arthur W. Sibbach
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE ENGINE OIL SCOOP WITH AIR SEPARATOR
- Publication number 20250012217
- Publication date Jan 9, 2025
- Pratt & Whitney Canada Corp.
- Daniel Alecu
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
BEARING CONFIGURATION FOR A ROTATIONAL EQUIPMENT ASSEMBLY
- Publication number 20250003367
- Publication date Jan 2, 2025
- Paul R. Hanrahan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
FLEXIBILITIES IN A GAS TURBINE ENGINE WITH A SPEED REDUCER
- Publication number 20240410319
- Publication date Dec 12, 2024
- SAFRAN AIRCRAFT ENGINES
- Julien Fabien Patrick BECOULET
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
AIRCRAFT ENGINE OIL DISTRIBUTION SYSTEM
- Publication number 20240410318
- Publication date Dec 12, 2024
- Pratt & Whitney Canada Corp.
- Michel BOUSQUET
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
METHODS AND APPARATUS TO REMOVE LIQUID FROM A HOUSING
- Publication number 20240410398
- Publication date Dec 12, 2024
- GENERAL ELECTRIC COMPANY
- Shishir Paresh Shah
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
GAS TURBINE ENGINE WITH HIGH SPEED LOW PRESSURE TURBINE SECTION AND...
- Publication number 20240401500
- Publication date Dec 5, 2024
- RTX Corporation
- Frederick M. Schwarz
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
AIRCRAFT ENGINE WITH SQUEEZE FILM DAMPER
- Publication number 20240401529
- Publication date Dec 5, 2024
- Pratt & Whitney Canada Corp.
- Daniel ALECU
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
TURBINE ENGINE COMPRISING AN OIL SUPPLY SYSTEM
- Publication number 20240401530
- Publication date Dec 5, 2024
- SAFRAN AIRCRAFT ENGINES
- Sébastien ORIOL
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
TURBINE ENGINE STRUCTURE WITH AN INTEGRAL FLUID RESERVOIR
- Publication number 20240392691
- Publication date Nov 28, 2024
- RTX Corporation
- Lawrence A. Binek
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
PHONIC WHEEL FOR TURBINE ENGINE
- Publication number 20240392693
- Publication date Nov 28, 2024
- Allison L. Bouldin
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
CAPACITIVE CHIP DETECTOR
- Publication number 20240393283
- Publication date Nov 28, 2024
- Pratt & Whitney Canada Corp.
- Sarmad KHAN
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
MIDSHAFT RATING FOR TURBOMACHINE ENGINES
- Publication number 20240392827
- Publication date Nov 28, 2024
- General Electric Company
- Narayanan Payyoor
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
TURBINE ENGINE PHONIC WHEEL WITH INTEGRATED LUBRICANT SCOOP
- Publication number 20240392694
- Publication date Nov 28, 2024
- Raytheon Technologies Corporation
- Joseph B. Phelps
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
SCOOP ASSEMBLY FOR ROTATIONAL EQUIPMENT
- Publication number 20240392724
- Publication date Nov 28, 2024
- Kyle L. Forgette
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
AIRCRAFT ENGINE WITH SQUEEZE FILM DAMPER
- Publication number 20240384754
- Publication date Nov 21, 2024
- Pratt & Whitney Canada Corp.
- Daniel ALECU
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
CANTILEVER NOZZLE WITH MODAL NATURAL FREQUENCY TUNING FEATURE
- Publication number 20240384685
- Publication date Nov 21, 2024
- Pratt & Whitney Canada Corp.
- Anthony Salconi
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
ROTATABLE HEAT EXCHANGER FOR A GAS TURBINE ENGINE
- Publication number 20240369107
- Publication date Nov 7, 2024
- GENERAL ELECTRIC COMPANY
- Eyitayo James Owoeye
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
ELECTRONICALLY CONTROLLED PRESSURE RELIEF SYSTEM FOR AN ENGINE
- Publication number 20240369017
- Publication date Nov 7, 2024
- Raytheon Technologies Corporation
- Connor J. McGuire
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
ROTATABLE HEAT EXCHANGER FOR A GAS TURBINE ENGINE
- Publication number 20240369019
- Publication date Nov 7, 2024
- GENERAL ELECTRIC COMPANY
- Eyitayo James Owoeye
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
REDUCTION GEARBOX FOR GAS TURBINE ENGINE WITH LUBRICATION CONTROL S...
- Publication number 20240369134
- Publication date Nov 7, 2024
- Pratt & Whitney Canada Corp.
- Michel DESJARDINS
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
SHAFT BEARING POSITIONING IN A GAS TURBINE ENGINE
- Publication number 20240352891
- Publication date Oct 24, 2024
- Rolls-Royce plc
- Jillian C GASKELL
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHODS AND APPARATUS FOR THERMAL MANAGEMENT OF SUMPS USING OLEOPHI...
- Publication number 20240352974
- Publication date Oct 24, 2024
- GENERAL ELECTRIC COMPANY
- Arman Mohammad Khan
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
OIL PUMP FOR GAS TURBINE ENGINE AND ASSOCIATED METHOD OF PUMPING OIL
- Publication number 20240352890
- Publication date Oct 24, 2024
- Pratt & Whitney Canada Corp.
- Dave MENHEERE
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
MAGNETIC-FOIL BEARING WITH COOLING SYSTEM
- Publication number 20240352968
- Publication date Oct 24, 2024
- Alexander R. Nelson
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
MAGNETIC-FOIL BEARING SUPPORTING TURBINE ENGINE ROTATING STRUCTURE
- Publication number 20240352889
- Publication date Oct 24, 2024
- Alexander R. Nelson
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES

Arrangements of bearings Lubricating

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Turbine engine shaft plug

Bearing configuration for a rotational equipment assembly

Midshaft rating for turbomachine engines

System and method for preloading a bearing

Operating a gas turbine engine

Reduced clearance interface between a fluid device and a rotating s...

Electromagnetic turbine and fluid recirculation system

Friction bearing, and method for lubricating and cooling a friction...

Gas turbine engine bearing and gearbox arrangement

Rotating carrier oil manifold

Gearboxes for aircraft gas turbine engines

Aircraft turbomachine comprising means for priming the lubricating...

Air/oil separator apparatus and method

Conformal structure for a gas turbine engine

Rotating electric machine system, and combined power system equippe...

Gas turbine engine with front support arrangement

Turbomachine comprising a rear integrated electrical machine

Methods and apparatus to maintain a state of a fluid in a system

Methods and systems for operating an aircraft engine

Midshaft rating for turbomachine engines

Heat management system for aircraft

Fan module comprising improved sealing means for a lubricant chamber

Mounting system for gearbox including corrugated bushing

Turbomachine fan assembly comprising a roller bearing and a double-...

Assembly for aircraft turbine engine comprising an improved system...

Epicyclic gear carrier assembly having an integrated lubrication pump

Geared gas turbine engine with combined spray bar and scavenge comp...

Forced air supply system for engine cavity under negative-G force

Power transmission system comprising an improved oil recovery channel

Oil delivery system architecture

Patents Applicationslast 30 patents

BUFFER AIR ASSEMBLY FOR AN AIRCRAFT ENGINE

METHOD OF MITIGATING VIBRATIONS IN A SEAL COMPONENT

GAS TURBINE ENGINE HAVING A HYDRAULIC FAN BRAKE

AIR TURBINE STARTER WITH FLUID DAMPING ASSEMBLY

LUBRICATION SYSTEM FOR A TURBINE ENGINE

GAS TURBINE ENGINE OIL SCOOP WITH AIR SEPARATOR

BEARING CONFIGURATION FOR A ROTATIONAL EQUIPMENT ASSEMBLY

FLEXIBILITIES IN A GAS TURBINE ENGINE WITH A SPEED REDUCER

AIRCRAFT ENGINE OIL DISTRIBUTION SYSTEM

METHODS AND APPARATUS TO REMOVE LIQUID FROM A HOUSING

GAS TURBINE ENGINE WITH HIGH SPEED LOW PRESSURE TURBINE SECTION AND...

AIRCRAFT ENGINE WITH SQUEEZE FILM DAMPER

TURBINE ENGINE COMPRISING AN OIL SUPPLY SYSTEM

TURBINE ENGINE STRUCTURE WITH AN INTEGRAL FLUID RESERVOIR

PHONIC WHEEL FOR TURBINE ENGINE

CAPACITIVE CHIP DETECTOR

MIDSHAFT RATING FOR TURBOMACHINE ENGINES

TURBINE ENGINE PHONIC WHEEL WITH INTEGRATED LUBRICANT SCOOP

SCOOP ASSEMBLY FOR ROTATIONAL EQUIPMENT

AIRCRAFT ENGINE WITH SQUEEZE FILM DAMPER

CANTILEVER NOZZLE WITH MODAL NATURAL FREQUENCY TUNING FEATURE

ROTATABLE HEAT EXCHANGER FOR A GAS TURBINE ENGINE

ELECTRONICALLY CONTROLLED PRESSURE RELIEF SYSTEM FOR AN ENGINE

ROTATABLE HEAT EXCHANGER FOR A GAS TURBINE ENGINE

REDUCTION GEARBOX FOR GAS TURBINE ENGINE WITH LUBRICATION CONTROL S...

SHAFT BEARING POSITIONING IN A GAS TURBINE ENGINE

METHODS AND APPARATUS FOR THERMAL MANAGEMENT OF SUMPS USING OLEOPHI...

OIL PUMP FOR GAS TURBINE ENGINE AND ASSOCIATED METHOD OF PUMPING OIL

MAGNETIC-FOIL BEARING WITH COOLING SYSTEM

MAGNETIC-FOIL BEARING SUPPORTING TURBINE ENGINE ROTATING STRUCTURE