through friction drives

Industry

CPC
F05D2260/402

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Parent Industries

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F05Engines, pumps F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS F05D2260/00Function

Current Industry

F05D2260/402through friction drives

Industries

Patents Grantslast 30 patents

Information Patent Grant
Variable speed pumping system with electric pump motor generator
- Patent number 12,116,899
- Issue date Oct 15, 2024
- Rolls-Royce PLC
- Christopher A. Murray
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Shaft power transfer for a multi spool gas turbine engine
- Patent number 12,044,182
- Issue date Jul 23, 2024
- General Electric Company
- Arthur William Sibbach
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Electric machine assembly for a turbine engine
- Patent number 12,037,913
- Issue date Jul 16, 2024
- GE AVIO S.R.L.
- Mehdi M. Baladi
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Mounting arrangement for a tension member driven system
- Patent number 12,018,618
- Issue date Jun 25, 2024
- Pratt & Whitney Canada Corp.
- Paul Weaver
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Pressure balancing of rotating control piston of generator transmis...
- Patent number 12,000,343
- Issue date Jun 4, 2024
- Hamilton Sundstrand Corporation
- Aaron Cooling
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Gas turbine engine with low pressure compressor stages
- Patent number 11,994,034
- Issue date May 28, 2024
- Pratt & Whitney Canada Corp.
- Ghislain Plante
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Device for driving a shaft of a jet engine for inspection purposes
- Patent number 11,926,438
- Issue date Mar 12, 2024
- Lufthansa Technik AG
- Jan Oke Peters
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Multi-engine system and power transfer between engines thereof
- Patent number 11,905,888
- Issue date Feb 20, 2024
- Pratt & Whitney Canada Corp.
- Daniel Coutu
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Multi-speed turbine reduction gearbox system and method
- Patent number 11,852,000
- Issue date Dec 26, 2023
- SIGNAL POWER GROUP OPERATING LLC
- David Keith Crowe
- E21 - EARTH DRILLING MINING
Information Patent Grant
Multi-speed transmission to control variable APU speed and constant...
- Patent number 11,808,211
- Issue date Nov 7, 2023
- Hamilton Sundstrand Corporation
- Jonathan C. Dell
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Pumping device for vehicle seat
- Patent number 11,795,955
- Issue date Oct 24, 2023
- HYUNDAI TRANSYS INCORPORATED
- Won Kim
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Turbomachine dual spool transmission systems
- Patent number 11,713,720
- Issue date Aug 1, 2023
- Hamilton Sundstrand Corporation
- Aaron M. Finke
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Systems and methods for controlling noise in aircraft powered by hy...
- Patent number 11,698,032
- Issue date Jul 11, 2023
- Pratt & Whitney Canada Corp.
- Sid-Ali Meslioui
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
System and method of operating multi-engine system
- Patent number 11,674,456
- Issue date Jun 13, 2023
- Pratt & Whitney Canada Corp.
- Philippe Beauchesne-Martel
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Decoupler for engine starter
- Patent number 11,668,244
- Issue date Jun 6, 2023
- Unison Industries, LLC
- Roberto Karpik
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Combustor for a micro-turbine gas generator
- Patent number 11,635,211
- Issue date Apr 25, 2023
- JETOPTERA, INC.
- Andrei Evulet
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Systems and methods for providing mechanical power to an aircraft a...
- Patent number 11,591,967
- Issue date Feb 28, 2023
- The Boeing Company
- David W. Foutch
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Gas turbine generator
- Patent number 11,549,386
- Issue date Jan 10, 2023
- Honda Motor Co., Ltd.
- Shunichiro Tamada
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Structure and method to mitigate rotor bow in turbine engine
- Patent number 11,549,392
- Issue date Jan 10, 2023
- General Electric Company
- Milind Chandrakant Dhabade
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Combined energy storage turbine and simple cycle peaker system
- Patent number 11,549,435
- Issue date Jan 10, 2023
- Powerphase International, LLC
- Robert J. Kraft
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Gas turbine engine turning system
- Patent number 11,536,202
- Issue date Dec 27, 2022
- GE AVIO S.R.L.
- Antonio Caimano
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Hybrid gas turbine engine and torque transfer assembly therefore
- Patent number 11,530,649
- Issue date Dec 20, 2022
- Pratt & Whitney Canada Corp.
- Daniel Alecu
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Embedded electric machine
- Patent number 11,473,441
- Issue date Oct 18, 2022
- General Electric Company
- Gert Johannes van der Merwe
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Gas turbine power generation system
- Patent number 11,441,488
- Issue date Sep 13, 2022
- TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
- Takahiro Ono
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Plant control apparatus, plant control method and power generation...
- Patent number 11,391,184
- Issue date Jul 19, 2022
- Toshiba Energy Systems & Solutions Corporation
- Mohammed Ameen Abbas Alzuraiqi
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Air turbine starter with decoupler
- Patent number 11,352,956
- Issue date Jun 7, 2022
- GE Aviation Systems LLC
- Eliel Fresco Rodriguez
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Mechanical shear fuse for engine motoring system
- Patent number 11,313,418
- Issue date Apr 26, 2022
- Hamilton Sundstrand Corporation
- Matthew Allen Slayter
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Aircraft engine generator disconnect device
- Patent number 11,293,498
- Issue date Apr 5, 2022
- SAFRAN ELECTRICAL & POWER
- Paul David Flower
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Gas turbine engine with intercooled cooling air and turbine drive
- Patent number 11,236,675
- Issue date Feb 1, 2022
- Raytheon Technologies Corporation
- Nathan Snape
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Gearbox for boost spool turbine engine
- Patent number 11,193,425
- Issue date Dec 7, 2021
- Raytheon Technologies Corporation
- Paul R. Hanrahan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

Patents Applicationslast 30 patents

Information Patent Application
AIRCRAFT POWER SYSTEM MODULE WITH INTEGRAL LUBRICANT RESERVOIR
- Publication number 20250122834
- Publication date Apr 17, 2025
- Pratt & Whitney Canada Corp.
- Guillaume Landry-Drolet
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
LUBRICATION SYSTEM FOR AIRCRAFT POWERPLANT AND CLUTCH SYSTEM
- Publication number 20250122841
- Publication date Apr 17, 2025
- Pratt & Whitney Canada Corp.
- Michel Desjardins
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
LUBRICATION SYSTEM FOR A TURBINE ENGINE
- Publication number 20250116207
- Publication date Apr 10, 2025
- GE AVIO S.r.L.
- Andrea Piazza
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
NEUTRAL TURBINE GEARBOX SYSTEM AND METHOD
- Publication number 20250043670
- Publication date Feb 6, 2025
- Signal Power Group Operating LLC
- David Keith Crowe
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
UNIDIRECTIONAL FAN BRAKE FOR A GAS TURBINE ENGINE
- Publication number 20240426250
- Publication date Dec 26, 2024
- GENERAL ELECTRIC COMPANY
- Eric Barre
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
TORQUE EXTRACTION SYSTEMS, TURBINE ENGINES, AND METHODS FOR EXTRACT...
- Publication number 20240369022
- Publication date Nov 7, 2024
- GENERAL ELECTRIC COMPANY
- Kudum Shinde
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
ELECTRIC MACHINE ASSEMBLY FOR A TURBINE ENGINE
- Publication number 20240328328
- Publication date Oct 3, 2024
- GE AVIO S.r.L.
- Mehdi Milani Baladi
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
MICRO-TURBINE GAS GENERATOR AND PROPULSIVE SYSTEM
- Publication number 20240191875
- Publication date Jun 13, 2024
- JETOPTERA, INC.
- Andrei Evulet
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
MULTI-SPEED TURBINE REDUCTION GEARBOX SYSTEM AND METHOD
- Publication number 20240076974
- Publication date Mar 7, 2024
- Signal Power Group Operating LLC
- David Keith Crowe
- E21 - EARTH DRILLING MINING
Information Patent Application
MICRO-TURBINE GAS GENERATOR AND PROPULSIVE SYSTEM
- Publication number 20240053017
- Publication date Feb 15, 2024
- JETOPTERA, INC.
- Andrei Evulet
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
SHAFT COUPLE FOR RAPID START
- Publication number 20240035417
- Publication date Feb 1, 2024
- Rolls-Royce Corporation
- Timothy Unton
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
SHAFT POWER TRANSFER FOR A MULTI SPOOL GAS TURBINE ENGINE
- Publication number 20230407795
- Publication date Dec 21, 2023
- GENERAL ELECTRIC COMPANY
- Arthur William Sibbach
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
MULTI-SPEED TRANSMISSION TO CONTROL VARIABLE APU SPEED AND CONSTANT...
- Publication number 20230323817
- Publication date Oct 12, 2023
- HAMILTON SUNDSTRAND CORPORATION
- Jonathan C. Dell
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
SYSTEM AND METHOD FOR USE WITH GAS TURBINE ENGINE
- Publication number 20230304446
- Publication date Sep 28, 2023
- Rolls-Royce plc
- Jan SMILEK
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
PUMPING SYSTEM
- Publication number 20230193776
- Publication date Jun 22, 2023
- Rolls-Royce plc
- Christopher A. MURRAY
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
SYSTEM AND METHOD OF OPERATING MULTI-ENGINE SYSTEM
- Publication number 20230175444
- Publication date Jun 8, 2023
- Pratt & Whitney Canada Corp.
- Philippe BEAUCHESNE-MARTEL
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
MULTI-SPEED TURBINE REDUCTION GEARBOX SYSTEM AND METHOD
- Publication number 20230139271
- Publication date May 4, 2023
- Signal Power Group Operating LLC
- David Keith Crowe
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
ELECTRIC MACHINE ASSEMBLY FOR A TURBINE ENGINE
- Publication number 20230132364
- Publication date Apr 27, 2023
- GE AVIO S.r.L.
- Mehdi M. Baladi
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
ELECTRICALLY DRIVEN REDUNDANT FUEL AND OIL PUMPING SYSTEM FOR GAS T...
- Publication number 20230076951
- Publication date Mar 9, 2023
- Rolls-Royce North American Technologies Inc.
- Alan W. Smith
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
Combined Energy Storage Turbine and Simple Cycle Peaker System
- Publication number 20230063511
- Publication date Mar 2, 2023
- Powerphase International, LLC
- Robert J. Kraft
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
MULTI-ENGINE SYSTEM AND POWER TRANSFER BETWEEN ENGINES THEREOF
- Publication number 20230034946
- Publication date Feb 2, 2023
- Pratt & Whitney Canada Corp.
- Daniel COUTU
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
SINGLE DRIVE, DUAL CLUTCH DRIVE SYSTEM FOR AN AIRCRAFT ACCESSORY
- Publication number 20220349349
- Publication date Nov 3, 2022
- HAMILTON SUNDSTRAND CORPORATION
- Aaron M. Finke
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
AIRCRAFT ENGINE SYSTEM INCLUDING A CLUTCH AND MOTOR CONTROLLER FOR...
- Publication number 20220352836
- Publication date Nov 3, 2022
- HAMILTON SUNDSTRAND CORPORATION
- Tyler W. Hayes
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
HYBRID GAS TURBINE ENGINE AND TORQUE TRANSFER ASSEMBLY THEREFORE
- Publication number 20220316403
- Publication date Oct 6, 2022
- Daniel ALECU
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE GENERATOR
- Publication number 20220298925
- Publication date Sep 22, 2022
- Honda Motor Co., Ltd.
- Shunichiro Tamada
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Systems and Methods for Providing Mechanical Power to an Aircraft A...
- Publication number 20220195884
- Publication date Jun 23, 2022
- The Boeing Company
- David W. Foutch
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
ELECTRIC MACHINE ASSEMBLY FOR A TURBINE ENGINE
- Publication number 20220136402
- Publication date May 5, 2022
- GE AVIO S.r.L.
- Mehdi M. Baladi
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
GAS-TURBINE-ENGINE OVERSPEED PROTECTION SYSTEM
- Publication number 20220098995
- Publication date Mar 31, 2022
- WILLIAMS INTERNATIONAL CO., L.L.C.
- Thomas J. WILLIAMS
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
PUMPING DEVICE FOR VEHICLE SEAT
- Publication number 20220099097
- Publication date Mar 31, 2022
- HYUNDAI TRANSYS INCORPORATED
- Won KIM
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
DEVICE FOR DRIVING A SHAFT OF A JET ENGINE FOR INSPECTION PURPOSES
- Publication number 20220073216
- Publication date Mar 10, 2022
- Lufthansa Technik AG
- Jan Oke Peters
- B64 - AIRCRAFT AVIATION COSMONAUTICS

through friction drives

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Variable speed pumping system with electric pump motor generator

Shaft power transfer for a multi spool gas turbine engine

Electric machine assembly for a turbine engine

Mounting arrangement for a tension member driven system

Pressure balancing of rotating control piston of generator transmis...

Gas turbine engine with low pressure compressor stages

Device for driving a shaft of a jet engine for inspection purposes

Multi-engine system and power transfer between engines thereof

Multi-speed turbine reduction gearbox system and method

Multi-speed transmission to control variable APU speed and constant...

Pumping device for vehicle seat

Turbomachine dual spool transmission systems

Systems and methods for controlling noise in aircraft powered by hy...

System and method of operating multi-engine system

Decoupler for engine starter

Combustor for a micro-turbine gas generator

Systems and methods for providing mechanical power to an aircraft a...

Gas turbine generator

Structure and method to mitigate rotor bow in turbine engine

Combined energy storage turbine and simple cycle peaker system

Gas turbine engine turning system

Hybrid gas turbine engine and torque transfer assembly therefore

Embedded electric machine

Gas turbine power generation system

Plant control apparatus, plant control method and power generation...

Air turbine starter with decoupler

Mechanical shear fuse for engine motoring system

Aircraft engine generator disconnect device

Gas turbine engine with intercooled cooling air and turbine drive

Gearbox for boost spool turbine engine

Patents Applicationslast 30 patents

AIRCRAFT POWER SYSTEM MODULE WITH INTEGRAL LUBRICANT RESERVOIR

LUBRICATION SYSTEM FOR AIRCRAFT POWERPLANT AND CLUTCH SYSTEM

LUBRICATION SYSTEM FOR A TURBINE ENGINE

NEUTRAL TURBINE GEARBOX SYSTEM AND METHOD

UNIDIRECTIONAL FAN BRAKE FOR A GAS TURBINE ENGINE

TORQUE EXTRACTION SYSTEMS, TURBINE ENGINES, AND METHODS FOR EXTRACT...

ELECTRIC MACHINE ASSEMBLY FOR A TURBINE ENGINE

MICRO-TURBINE GAS GENERATOR AND PROPULSIVE SYSTEM

MULTI-SPEED TURBINE REDUCTION GEARBOX SYSTEM AND METHOD

MICRO-TURBINE GAS GENERATOR AND PROPULSIVE SYSTEM

SHAFT COUPLE FOR RAPID START

SHAFT POWER TRANSFER FOR A MULTI SPOOL GAS TURBINE ENGINE

MULTI-SPEED TRANSMISSION TO CONTROL VARIABLE APU SPEED AND CONSTANT...

SYSTEM AND METHOD FOR USE WITH GAS TURBINE ENGINE

PUMPING SYSTEM

SYSTEM AND METHOD OF OPERATING MULTI-ENGINE SYSTEM

MULTI-SPEED TURBINE REDUCTION GEARBOX SYSTEM AND METHOD

ELECTRIC MACHINE ASSEMBLY FOR A TURBINE ENGINE

ELECTRICALLY DRIVEN REDUNDANT FUEL AND OIL PUMPING SYSTEM FOR GAS T...

Combined Energy Storage Turbine and Simple Cycle Peaker System

MULTI-ENGINE SYSTEM AND POWER TRANSFER BETWEEN ENGINES THEREOF

SINGLE DRIVE, DUAL CLUTCH DRIVE SYSTEM FOR AN AIRCRAFT ACCESSORY

AIRCRAFT ENGINE SYSTEM INCLUDING A CLUTCH AND MOTOR CONTROLLER FOR...

HYBRID GAS TURBINE ENGINE AND TORQUE TRANSFER ASSEMBLY THEREFORE

GAS TURBINE GENERATOR

Systems and Methods for Providing Mechanical Power to an Aircraft A...

ELECTRIC MACHINE ASSEMBLY FOR A TURBINE ENGINE

GAS-TURBINE-ENGINE OVERSPEED PROTECTION SYSTEM

PUMPING DEVICE FOR VEHICLE SEAT

DEVICE FOR DRIVING A SHAFT OF A JET ENGINE FOR INSPECTION PURPOSES