Patents by Inventor David Richard Griffin

David Richard Griffin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10738643
    Abstract: A seal assembly includes a seal arc segment defining first and second seal supports with a carriage defining first and second support members. The first support member supports the seal arc segment in a first ramped interface, and the second support member supports the seal arc segment in a second ramped interface. A spring is configured to bias the seal arc segment axially. A heat shield is radially inward of the spring.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: August 11, 2020
    Assignee: Raytheon Technologies Corporation
    Inventors: Michael G. McCaffrey, Benjamin F. Hagan, David Richard Griffin
  • Patent number: 10662791
    Abstract: A support ring for a gas turbine engine includes a main body portion extending circumferentially about a center axis, a radially extending portion extending radially inward from the main body portion and having a plurality of openings, and a plurality of anti-rotation tabs extending radially inward from the main body portion and axially spaced from the radially extending portion.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: May 26, 2020
    Assignee: United Technologies Corporation
    Inventors: Michael S. Stevens, David Richard Griffin
  • Patent number: 10584613
    Abstract: A debris separator for a gas turbine engine component includes a first body section along an axis, the first body section comprising a first orifice, a neck section adjacent to the first body section along the axis, and a second body section along the axis adjacent to the neck region, the second body section forming an exit along the axis.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: March 10, 2020
    Assignee: United Technologies Corporation
    Inventors: Michael S. Stevens, David Richard Griffin
  • Publication number: 20200025041
    Abstract: A debris separator for a gas turbine engine component includes a first body section along an axis, the first body section comprising a first orifice, a neck section adjacent to the first body section along the axis, and a second body section along the axis adjacent to the neck region, the second body section forming an exit along the axis.
    Type: Application
    Filed: July 18, 2018
    Publication date: January 23, 2020
    Applicant: United Technologies Corporation
    Inventors: Michael S. Stevens, David Richard Griffin
  • Patent number: 10427075
    Abstract: A gas turbine engine includes an engine static structure that provides a flow path. A metering hole is provided in the engine static structure. A strainer is arranged over the metering hole. The strainer includes multiple holes that have a total area that is greater than a metering hole area.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: October 1, 2019
    Assignee: United Technologies Corporation
    Inventors: Timothy J. Jennings, Christopher Whitfield, David Richard Griffin, Christopher Cosher
  • Patent number: 10422241
    Abstract: A blade outer air seal support includes, at least one arc body having a first portion and a second portion, a blade outer air seal mounting region defined at least partially between the first portion and the second portion, and an interface feature interfacing the first portion and the second portion. The interface feature is configured such that axially aligned forces are communicated between the first and second portions through the interface feature, bypassing the blade outer air seal mounting region.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: September 24, 2019
    Assignee: United Technologies Corporation
    Inventors: Michael G. McCaffrey, Peter Balawajder, David Richard Griffin, Benjamin F. Hagan
  • Patent number: 10385716
    Abstract: A gas turbine engine assembly includes a shield that has a first portion and a second portion. The first portion extends radially from an axial end portion of the shield and includes a blade outer air seal contact surface. The second portion extends axially from a radially outer end of the first portion and includes a vane contact surface.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: August 20, 2019
    Assignee: UNTED TECHNOLOGIES CORPORATION
    Inventors: Paul M. Lutjen, Christopher William Moore, David Richard Griffin
  • Patent number: 10337346
    Abstract: A blades outer air seal includes a seal arc segment that defines radially inner and outer sides. The radially outer side includes radially-extending sidewalls and a radially inner surface that joins the radially-extending sidewalls. The radially-extending sidewalls and the radially inner surface define a pocket. A manifold is disposed at least partially in the pocket. The manifold subdivides the pocket such that there is a manifold chamber bounded by the manifold and the radially inner surface. The manifold includes at least one inlet and a plurality of outlets.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: July 2, 2019
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Michael G. McCaffrey, Benjamin F. Hagan, David Richard Griffin
  • Publication number: 20190178097
    Abstract: A support ring for a gas turbine engine includes a main body portion extending circumferentially about a center axis, a radially extending portion extending radially inward from the main body portion and having a plurality of openings, and a plurality of anti-rotation tabs extending radially inward from the main body portion and axially spaced from the radially extending portion.
    Type: Application
    Filed: October 16, 2018
    Publication date: June 13, 2019
    Inventors: Michael S. Stevens, David Richard Griffin
  • Patent number: 10273819
    Abstract: A chamfered stator vane rail is provided. The chamfered stator vane rail may comprise a forward rail and an aft rail axially opposite the forward rail. The aft rail may comprise a leading edge and a trailing edge located axially opposite and aft of the leading edge. The aft rail may comprise a chamfered edge on a radially outer surface. The chamfered edge may be oriented at an angle relative to an axis.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: April 30, 2019
    Assignee: United Technologies Corporation
    Inventors: Tracy A. Propheter-Hinckley, Roger Gates, David Richard Griffin, James Tilsley Auxier
  • Publication number: 20190048796
    Abstract: A method of assembling a gas turbine engine includes setting a build clearance at assembly in response to a running tip clearance defined with a cooled cooling air. A method of operating a gas turbine engine includes supplying a cooled cooling air to a high pressure turbine in response to an engine rotor speed.
    Type: Application
    Filed: July 30, 2018
    Publication date: February 14, 2019
    Applicant: United Technologies Corporation
    Inventors: Walter A. Ledwith, Jr., Scott A. Carr, Christopher J. Hanlon, Peter A. White, Theodore W. Hall, John R. Farris, Andrew S. Miller, Christopher W. Robak, David C. Pimenta, David Richard Griffin
  • Publication number: 20190048736
    Abstract: A seal assembly includes a seal arc segment defining first and second seal supports with a carriage defining first and second support members. The first support member supports the seal arc segment in a first ramped interface, and the second support member supports the seal arc segment in a second ramped interface. A spring is configured to bias the seal arc segment axially. A heat shield is radially inward of the spring.
    Type: Application
    Filed: October 19, 2018
    Publication date: February 14, 2019
    Inventors: Michael G. McCaffrey, Benjamin F. Hagan, David Richard Griffin
  • Patent number: 10161258
    Abstract: A seal assembly includes a seal arc segment that defines radially inner and outer sides with the radially outer side including radially-extending sidewalls. A radially inner surface joins the radially-extending sidewalls. The radially-extending sidewalls and the radially inner surface define a pocket. A rail shield has radially-extending walls lines the radially-extending sidewalls.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: December 25, 2018
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Michael G. McCaffrey, Benjamin F. Hagan, David Richard Griffin, Peter Balawajder, Christopher Corcoran
  • Publication number: 20180361284
    Abstract: A gas turbine engine includes an engine static structure that provides a flow path. A metering hole is provided in the engine static structure. A strainer is arranged over the metering hole. The strainer includes multiple holes that have a total area that is greater than a metering hole area.
    Type: Application
    Filed: June 20, 2017
    Publication date: December 20, 2018
    Inventors: Timothy J. Jennings, Christopher Whitfield, David Richard Griffin, Christopher Cosher
  • Patent number: 10138750
    Abstract: A seal assembly includes a seal arc segment defining first and second seal supports with a carriage defining first and second support members. The first support member supports the seal arc segment in a first ramped interface, and the second support member supports the seal arc segment in a second ramped interface. A spring is configured to bias the seal arc segment axially. A heat shield is radially inward of the spring.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: November 27, 2018
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Michael G. McCaffrey, Benjamin F. Hagan, David Richard Griffin
  • Publication number: 20180058230
    Abstract: A chamfered stator vane rail is provided. The chamfered stator vane rail may comprise a forward rail and an aft rail axially opposite the forward rail. The aft rail may comprise a leading edge and a trailing edge located axially opposite and aft of the leading edge. The aft rail may comprise a chamfered edge on a radially outer surface. The chamfered edge may be oriented at an angle relative to an axis.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 1, 2018
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Tracy A. Propheter-Hinckley, Roger Gates, David Richard Griffin, James Tilsley Auxier
  • Patent number: 9835032
    Abstract: A rotor disk is provided. The rotor disk may comprise a disk lug and a trench. The disk lug may be fixed to a distal surface of the rotor disk. The trench may be disposed on a surface of the disk lug. The trench may extend radially inwards from a distal surface of the disk lug. The trench may be configured to at least partially define a flow path by which cooling air may reach a distal surface of the disk lug in order to provide disk lug cooling.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: December 5, 2017
    Assignee: United Technologies Corporation
    Inventors: David Richard Griffin, Zachary Mott, Christopher Corcoran, Ross Wilson, Jason D Himes
  • Publication number: 20170328231
    Abstract: A method of assembling a gas turbine engine includes setting a build clearance at assembly in response to a running tip clearance defined with a cooled cooling air. A method of operating a gas turbine engine includes supplying a cooled cooling air to a high pressure turbine in response to an engine rotor speed.
    Type: Application
    Filed: March 6, 2015
    Publication date: November 16, 2017
    Inventors: Walter A. Ledwith, JR., Scott A. Carr, Christopher J. Hanlon, Peter A. White, Theodore W. Hall, John R. Farris, Andrew S. Miller, Christopher W. Robak, David C. Pimenta, David Richard Griffin
  • Publication number: 20170268362
    Abstract: A blades outer air seal includes a seal arc segment that defines radially inner and outer sides. The radially outer side includes radially-extending sidewalls and a radially inner surface that joins the radially-extending sidewalls. The radially-extending sidewalls and the radially inner surface define a pocket. A manifold is disposed at least partially in the pocket. The manifold subdivides the pocket such that there is a manifold chamber bounded by the manifold and the radially inner surface. The manifold includes at least one inlet and a plurality of outlets.
    Type: Application
    Filed: March 16, 2016
    Publication date: September 21, 2017
    Inventors: Michael G. McCaffrey, Benjamin F. Hagan, David Richard Griffin
  • Publication number: 20170268371
    Abstract: A seal assembly includes a seal arc segment defining first and second seal supports with a carriage defining first and second support members. The first support member supports the seal arc segment in a first ramped interface, and the second support member supports the seal arc segment in a second ramped interface. A spring is configured to bias the seal arc segment axially. A heat shield is radially inward of the spring.
    Type: Application
    Filed: March 16, 2016
    Publication date: September 21, 2017
    Inventors: Michael G. McCaffrey, Benjamin F. Hagan, David Richard Griffin