Turbine blade with friction and impact vibration damping elements

Zhang, James; Wondrasek, Michael Anthony; Delvaux, John McConnell

Advanced Search OptionsAdvanced Search queries use a traditional Term Search. For more info, see our FAQ.

All Fields:

Patent Title:

Abstract:

Assignee:

Inventor(s):

Patent Number:

Patent Classification (CPC):

All Classifications
A - human necessities
A01 - agriculture
A21 - baking
A22 - butchering
A23 - foods or foodstuffs
A24 - tobacco
A41 - wearing apparel
A42 - headwear
A43 - footwear
A44 - haberdashery
A45 - hand or travelling articles
A46 - brushware
A47 - furniture
A61 - medical or veterinary science
A62 - life-saving
A63 - sports
A99 - subject matter not otherwise provided for in this section
B - performing operations
B01 - physical or chemical processes or apparatus in general
B02 - crushing, pulverising, or disintegrating
B03 - separation of solid materials using liquids or using pneumatic tables or jigs
B04 - centrifugal apparatus or machines for carrying-out physical or chemical processes
B05 - spraying or atomising in general
B06 - generating or transmitting mechanical vibrations in general
B07 - separating solids from solids
B08 - cleaning
B09 - disposal of solid waste
B21 - mechanical metal-working without essentially removing material
B22 - casting
B23 - machine tools
B24 - grinding
B25 - hand tools
B26 - hand cutting tools
B27 - working or preserving wood or similar material
B28 - working cement, clay, or stone
B29 - working of plastics
B30 - presses
B31 - making articles of paper, cardboard or material worked in a manner analogous to paper
B32 - layered products
B33 - additive manufacturing technology
B41 - printing
B42 - bookbinding
B43 - writing or drawing implements
B44 - decorative arts
B60 - vehicles in general
B61 - railways
B62 - land vehicles for travelling otherwise than on rails
B63 - ships or other waterborne vessels
B64 - aircraft
B65 - conveying
B66 - hoisting
B67 - opening, closing {or cleaning} bottles, jars or similar containers
B68 - saddlery
B81 - microstructural technology
B82 - nanotechnology
B99 - subject matter not otherwise provided for in this section
C - chemistry
C01 - inorganic chemistry
C02 - treatment of water, waste water, sewage, or sludge
C03 - glass
C04 - cements
C05 - fertilisers
C06 - explosives
C07 - organic chemistry
C08 - organic macromolecular compounds
C09 - dyes
C10 - petroleum, gas or coke industries
C11 - animal or vegetable oils, fats, fatty substances or waxes
C12 - biochemistry
C13 - sugar industry
C14 - skins
C21 - metallurgy of iron
C22 - metallurgy
C23 - coating metallic material
C25 - electrolytic or electrophoretic processes
C30 - crystal growth
C40 - combinatorial technology
C99 - subject matter not otherwise provided for in this section
D - textiles
D01 - natural or man-made threads or fibres
D02 - yarns
D03 - weaving
D04 - braiding
D05 - sewing
D06 - treatment of textiles or the like
D07 - ropes
D10 - indexing scheme associated with sublasses of section d, relating to textiles
D21 - paper-making
D99 - subject matter not otherwise provided for in this section
E - fixed constructions
E01 - construction of roads, railways, or bridges
E02 - hydraulic engineering
E03 - water supply
E04 - building
E05 - locks
E06 - doors, windows, shutters, or roller blinds in general
E21 - earth drilling
E99 - subject matter not otherwise provided for in this section
F - mechanical engineering
F01 - machines or engines in general
F02 - combustion engines
F03 - machines or engines for liquids
F04 - positive - displacement machines for liquids
F05 - indexing schemes relating to engines or pumps in various subclasses of classes f01-f04
F15 - fluid-pressure actuators
F16 - engineering elements and units
F17 - storing or distributing gases or liquids
F21 - lighting
F22 - steam generation
F23 - combustion apparatus
F24 - heating
F25 - refrigeration or cooling
F26 - drying
F27 - furnaces
F28 - heat exchange in general
F41 - weapons
F42 - ammunition
F99 - subject matter not otherwise provided for in this section
G - physics
G01 - measuring
G02 - optics
G03 - photography
G04 - horology
G05 - controlling
G06 - computing
G07 - checking-devices
G08 - signalling
G09 - education
G10 - musical instruments
G11 - information storage
G12 - instrument details
G16 - information and communication technology [ict] specially adapted for specific application fields
G21 - nuclear physics
G99 - subject matter not otherwise provided for in this section
H - electricity
H01 - basic electric elements
H02 - generation
H03 - basic electronic circuitry
H04 - electric communication technique
H05 - electric techniques not otherwise provided for
H99 - subject matter not otherwise provided for in this section
Y - new / cross sectional technologies
Y02 - technologies or applications for mitigation or adaptation against climate change
Y04 - information or communication technologies having an impact on other technology areas
Y10 - technical subjects covered by former uspc

More Options ...

Title: Turbine blade with friction and impact vibration damping elements

Abstract

A turbine blade includes an airfoil body having an outer tip and a platform; and a part-span shroud positioned between the outer tip and the platform of the airfoil body. The part-span shroud has a first opening extending through the airfoil body and having a first inner surface. The airfoil body includes a second opening extending radially from the first opening and having a second inner surface. A first elongated vibration-damping element is disposed in the first opening, and a second elongated vibration-damping element disposed radially in the second opening. The second elongated vibration-damping element includes a free radially outer end and a radially inner end coupled to the first elongated vibration-damping element. The first elongated vibration-damping element frictionally damps vibration, and the second elongated vibration-damping element damps vibration using impact within the second opening.

Inventors:: Zhang, James; Wondrasek, Michael Anthony; Delvaux, John McConnell

Issue Date:: 2021-10-12

Research Org.:: General Electric Co., Schenectady, NY (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1859935

Patent Number(s):: 11143036

Application Number:: 16/998,207

Assignee:: General Electric Company (Schenectady, NY)

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

Show more

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
F01D5/16 - for counteracting blade vibration
F01D5/225 - {by shrouding}

F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
F05D2220/30 - in turbines
F05D2250/132 - hexagonal
F05D2250/14 - elliptical
F05D2250/313 - the axes being perpendicular to each other
F05D2260/96 - Preventing, counteracting or reducing vibration or noise

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
Y02T50/60 - Efficient propulsion technologies

Show less

DOE Contract Number:: FE0031613

Resource Type:: Patent

Resource Relation:: Patent File Date: 08/20/2020

Country of Publication:: United States

Language:: English

Citation Formats


                    Zhang, James, Wondrasek, Michael Anthony, and Delvaux, John McConnell. Turbine blade with friction and impact vibration damping elements.  United States: N. p., 2021. 
        Web.

Copy to clipboard


                    Zhang, James, Wondrasek, Michael Anthony, & Delvaux, John McConnell. Turbine blade with friction and impact vibration damping elements.  United States.

Copy to clipboard


                    Zhang, James, Wondrasek, Michael Anthony, and Delvaux, John McConnell. Tue .  
        "Turbine blade with friction and impact vibration damping elements".  United States.  https://www.osti.gov/servlets/purl/1859935.

Copy to clipboard


                    
@article{osti_1859935,

  title        = {Turbine blade with friction and impact vibration damping elements},

  author       = {Zhang, James and Wondrasek, Michael Anthony and Delvaux, John McConnell},

  abstractNote = {A turbine blade includes an airfoil body having an outer tip and a platform; and a part-span shroud positioned between the outer tip and the platform of the airfoil body. The part-span shroud has a first opening extending through the airfoil body and having a first inner surface. The airfoil body includes a second opening extending radially from the first opening and having a second inner surface. A first elongated vibration-damping element is disposed in the first opening, and a second elongated vibration-damping element disposed radially in the second opening. The second elongated vibration-damping element includes a free radially outer end and a radially inner end coupled to the first elongated vibration-damping element. The first elongated vibration-damping element frictionally damps vibration, and the second elongated vibration-damping element damps vibration using impact within the second opening.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2021},

  month        = {10}

}

Copy to clipboard

Patent:

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Self-tuning impact damper for rotating blades
patent, December 2004

Duffy, Kirsten P.; Brown, Geoffrey; Bagley, Ronald L.
US Patent Document 6,827,551
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6827551

Damping device for composite blade
patent, November 2011

Le Hong, Son; Lombard, Jean-Pierre Francois
US Patent Document 8,061,997
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8061997

Internally damped airfoiled component and method
patent, June 2020

Blaney, Ken F.; Hayford, Richard K.
US Patent Document 10,697,303
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/10697303

Damper Pin for a Turbine Blade
patent-application, March 2017

Kareff, Spencer A.; Potter, Brian Denver; Jacala, Ariel Caesar Prepena
US Patent Application 14/844317; 20170067348
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20170067348

Vibration Damping Coatings
patent, September 1973

Cross, Kenneth R.; Cavanagh, John R.; Newman, Richard L.
US Patent Document 3,758,233
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/3758233

Damped turbine engine frame
patent, February 1994

Von Benken, John D.
US Patent Document 5,284,011
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5284011

Structures for damping of turbine components
patent-application, February 2009

Hardwicke, Canan Uslu; Delvaux, John McConnell; Boyer, Bradley Taylor
US Patent Application 11/844462; 20090053068
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20090053068

Gas Turbine Blade with Intra-Spin Snubber and Manufacturing Method for Producing the Same
patent-application, February 2012

Merrill, Gary B.; Mayer, Clinton
US Patent Application 12/848456; 20120027616
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20120027616

Turbine blade damping
patent, July 1975

Pierpoline, Mario F.; Kuchma, Frank J.
US Patent Document 3,893,782
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/3893782

Piezo Actuated High Speed Air Valve Used for Blade and Component Excitation
patent-application, February 2018

Van Duyn, Keven G.; Currier, Todd M.
US Patent Application 15/242868; 20180052039
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20180052039

Turbine blade with vibration damper
patent-application, April 2007

Garner, Chad M.
US Patent Application 11/244752; 20070081894
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20070081894

Programmable jet blade excitation system
patent, October 1988

Barton, Serge P.; Rozelle, Paul F.; Twerdochlib, Michael
US Patent Document 4,776,216
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4776216

Vibration-Suppressed Blade
patent, August 1973

Fu, Chuen-Cheng; Gangal, Mukund D.
US Patent Document 3,754,838
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/3754838

Damped airfoil blade
patent, November 1992

Stoner, Alan W.; El-Aini, Yehia M.; Wiebe, David J.
US Patent Document 5,165,860
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5165860

Flat Bottom Damper Pin For Turbine Blades
patent-application, March 2014

Kareff, Spencer Aaron; Piersall, Matthew Robert
US Patent Application 13/616129; 20140079529
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20140079529

Constrained layer, composite, acoustic damping material
patent-application, February 2006

Eadara, Rajan; Jacob, Roy; Konovaliv, Anthony
US Patent Application 11/207160; 20060040096
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20060040096

Cooled snubber structure for turbine blades
patent, April 2014

Mayer, Clinton A.; Campbell, Christian X.; Whalley, Andrew
US Patent Document 8,684,692
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8684692

Gas turbine blade with intra-span snubber
patent, July 2014

Merrill, Gary B.; Mayer, Clinton A.
US Patent Document 8,790,082
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8790082

Turbine blade assembly with pin dampers
patent, January 2004

Davis, Gary A.; Tuttle, Gary E.
US Patent Document 6,676,380
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6676380

Device and method for reducing one or more resonant vibrations of rotor blades in turbomachines
patent, October 1993

Bothien, Mihaylo-Rudiger; Wuthrich, Christian
US Patent Document 5,256,031
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5256031

Bucket assembly for use in a turbine engine
patent, April 2017

Pierre, Sylvain; Brown, Holly Davis
US Patent Document 9,631,500
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9631500

Self retaining blade damper
patent, January 2001

Stec, Philip F.
US Patent Document 6,171,058
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6171058

Aerodynamic damping of vibrations in rotor blades
patent, July 1985

Barry, Brian; Freeman, Christopher
US Patent Document 4,531,362
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4531362

Turbine blade platform damper
patent, June 1993

Steckle, Charles E.; Dietz, Philip W.; Willgoose, Kenneth
US Patent Document 5,215,442
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5215442

Gas Turbine Engine with Airfoil Dampening System
patent-application, September 2016

Henry, Mark S.
US Patent Application 15/056317; 20160258440
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20160258440

Vibration damper coating
patent-application, April 2007

Wagner, William Kent; Ackerman, John Frederick; Johnson, Kenneth Lee
US Patent Application 11/244938; 20070081901
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20070081901

Damping arrangement for a blade of an axial turbine
patent, November 2007

Masserey, Pierre-Alain; Szwedowicz, Dariusz; Szwedowicz, Jaroslaw Leszek
US Patent Document 7,300,256
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7300256

Internally Damped Airfoiled Component and Method
patent-application, March 2016

Blaney, Ken F.; Hayford, Richard K.
US Patent Application 14/785119; 20160084089
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20160084089

Cooled Snubber Structure for Turbine Blades
patent-application, August 2011

Mayer, Clinton A.; Campbell, Christian X.; Whalley, Andrew
US Patent Application 13/023651; 20110194943
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110194943

Damping Apparatus
patent, September 1961

McGinnis, Ralph E.
US Patent Document 2,999,669
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/2999669

Vibration Damper for Blades and Vanes
patent, September 1954

Odeguard, Eugene A.
US Patent Document 2,689,107
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/2689107

Bucket Assembly for Use in a Turbine Engine
patent-application, April 2015

Pierre, Sylvain; Brown, Holly Davis
US Patent Application 14/066928; 20150118062
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20150118062

Damping material, damping arrangement and method for designing a damping arrangement
patent, November 2007

Bonnet, Laurent
US Patent Document 7,296,977
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7296977

Damping arrangement for a blade of an axial turbine
patent-application, November 2007

Masserey, Pierre-Alain; Szwedowicz, Dariusz; Szwedowicz, Jaroslaw
US Patent Application 10/997885; 20070253828
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20070253828

Similar Records in DOE Patents and OSTI.GOV collections:

Pressurized damping fluid injection for damping turbine blade vibration

Patent Delvaux, John McConnell; Lang, Claire Fridtjof; Chakrabarti, Suryarghya

A blade vibration damping system impacts a pressurized damping fluid on a surface of at least one of a plurality of blades of a turbine in opposition to a vibratory movement thereof to cause damping of vibration of the blade(s) during operation of the turbine. The system includes a fluid injection nozzle in a stationary component adjacent the plurality of blades. A valve selectively admits the pressurized damping fluid to the fluid injection nozzle from a source of pressurized damping fluid, and a control system controls the valve to operate the fluid injection nozzle in response to an operational parametermore » « less
Full Text Available
Wind turbine blade with viscoelastic damping

Patent Sievers, Ryan A.; Mullings, Justin L.

A wind turbine blade (60) damped by viscoelastic material (54, 54A-F) sandwiched between stiffer load-bearing sublayers (52A, 52B, 56A, 56B) in portions of the blade effective to damp oscillations (38) of the blade. The viscoelastic material may be located in one or more of: a forward portion (54A) of the shell, an aft portion (54D) of the shell, pressure and suction side end caps (54B) of an internal spar, internal webbing walls (54C, 54E), and a trailing edge core (54F).
Full Text Available
Turbine blade with tuned damping structure

Patent Campbell, Christian X.; Messmann, Stephen J.

A turbine blade is provided comprising: a root; an airfoil comprising an external wall extending radially from the root and having a radially outermost portion; and a damping structure. The external wall may comprise first and second side walls joined together to define an inner cavity of the airfoil. The damping structure may be positioned within the airfoil inner cavity and coupled to the airfoil so as to define a tuned mass damper.
Full Text Available
Turbine blade damping device with controlled loading

Patent Marra, John J.

A damping structure for a turbomachine rotor. The damping structure including an elongated snubber element including a first snubber end rigidly attached to a first blade and extending toward an adjacent second blade, and an opposite second snubber end positioned adjacent to a cooperating surface associated with the second blade. The snubber element has a centerline extending radially inwardly in a direction from the first blade toward the second blade along at least a portion of the snubber element between the first and second snubber ends. Rotational movement of the rotor effects relative movement between the second snubber end andmore » « less
Full Text Available
Turbine blade damping device with controlled loading

Patent Marra, John J

A damping structure for a turbomachine rotor. The damping structure including an elongated snubber element including a first snubber end rigidly attached to a first blade and extending toward an adjacent second blade, and an opposite second snubber end positioned adjacent to a cooperating surface associated with the second blade. The snubber element has a centerline extending radially inwardly in a direction from the first blade toward the second blade along at least a portion of the snubber element between the first and second snubber ends. Rotational movement of the rotor effects relative movement between the second snubber end andmore » « less
Full Text Available

Similar Records

Title: Turbine blade with friction and impact vibration damping elements

Abstract

Citation Formats

Self-tuning impact damper for rotating blades patent, December 2004

Damping device for composite blade patent, November 2011

Internally damped airfoiled component and method patent, June 2020

Damper Pin for a Turbine Blade patent-application, March 2017

Vibration Damping Coatings patent, September 1973

Damped turbine engine frame patent, February 1994

Structures for damping of turbine components patent-application, February 2009

Gas Turbine Blade with Intra-Spin Snubber and Manufacturing Method for Producing the Same patent-application, February 2012

Turbine blade damping patent, July 1975

Piezo Actuated High Speed Air Valve Used for Blade and Component Excitation patent-application, February 2018

Turbine blade with vibration damper patent-application, April 2007

Programmable jet blade excitation system patent, October 1988

Vibration-Suppressed Blade patent, August 1973

Damped airfoil blade patent, November 1992

Flat Bottom Damper Pin For Turbine Blades patent-application, March 2014

Constrained layer, composite, acoustic damping material patent-application, February 2006

Cooled snubber structure for turbine blades patent, April 2014

Gas turbine blade with intra-span snubber patent, July 2014

Turbine blade assembly with pin dampers patent, January 2004

Device and method for reducing one or more resonant vibrations of rotor blades in turbomachines patent, October 1993

Bucket assembly for use in a turbine engine patent, April 2017

Self retaining blade damper patent, January 2001

Aerodynamic damping of vibrations in rotor blades patent, July 1985

Turbine blade platform damper patent, June 1993

Gas Turbine Engine with Airfoil Dampening System patent-application, September 2016

Vibration damper coating patent-application, April 2007

Damping arrangement for a blade of an axial turbine patent, November 2007

Internally Damped Airfoiled Component and Method patent-application, March 2016

Cooled Snubber Structure for Turbine Blades patent-application, August 2011

Damping Apparatus patent, September 1961

Vibration Damper for Blades and Vanes patent, September 1954

Bucket Assembly for Use in a Turbine Engine patent-application, April 2015

Damping material, damping arrangement and method for designing a damping arrangement patent, November 2007

Damping arrangement for a blade of an axial turbine patent-application, November 2007

Self-tuning impact damper for rotating blades
patent, December 2004

Damping device for composite blade
patent, November 2011

Internally damped airfoiled component and method
patent, June 2020

Damper Pin for a Turbine Blade
patent-application, March 2017

Vibration Damping Coatings
patent, September 1973

Damped turbine engine frame
patent, February 1994

Structures for damping of turbine components
patent-application, February 2009

Gas Turbine Blade with Intra-Spin Snubber and Manufacturing Method for Producing the Same
patent-application, February 2012

Turbine blade damping
patent, July 1975

Piezo Actuated High Speed Air Valve Used for Blade and Component Excitation
patent-application, February 2018

Turbine blade with vibration damper
patent-application, April 2007

Programmable jet blade excitation system
patent, October 1988

Vibration-Suppressed Blade
patent, August 1973

Damped airfoil blade
patent, November 1992

Flat Bottom Damper Pin For Turbine Blades
patent-application, March 2014

Constrained layer, composite, acoustic damping material
patent-application, February 2006

Cooled snubber structure for turbine blades
patent, April 2014

Gas turbine blade with intra-span snubber
patent, July 2014

Turbine blade assembly with pin dampers
patent, January 2004

Device and method for reducing one or more resonant vibrations of rotor blades in turbomachines
patent, October 1993

Bucket assembly for use in a turbine engine
patent, April 2017

Self retaining blade damper
patent, January 2001

Aerodynamic damping of vibrations in rotor blades
patent, July 1985

Turbine blade platform damper
patent, June 1993

Gas Turbine Engine with Airfoil Dampening System
patent-application, September 2016

Vibration damper coating
patent-application, April 2007

Damping arrangement for a blade of an axial turbine
patent, November 2007

Internally Damped Airfoiled Component and Method
patent-application, March 2016

Cooled Snubber Structure for Turbine Blades
patent-application, August 2011

Damping Apparatus
patent, September 1961

Vibration Damper for Blades and Vanes
patent, September 1954

Bucket Assembly for Use in a Turbine Engine
patent-application, April 2015

Damping material, damping arrangement and method for designing a damping arrangement
patent, November 2007

Damping arrangement for a blade of an axial turbine
patent-application, November 2007