Patents by Inventor Leanne L. Lehman

Leanne L. Lehman 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: 10543663
    Abstract: A thermal protection system is provided for a vehicle substructure. The thermal protection system comprises an outer layer for protecting the vehicle substructure. The thermal protection system further comprises an inner layer for conforming to the vehicle substructure. The thermal protection system also comprises an insulation layer sandwiched between the inner and outer layers. The insulation layer includes a porous low-density ceramic insulating material having a densified portion that covers an inner surface of the outer layer to strengthen adhesion.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: January 28, 2020
    Assignee: The Boeing Company
    Inventors: Vann Heng, Winnie W. Chen, Leanne L. Lehman, Patrick J. Mobers, Merna E. Salama, Thomas R. Pinney, Jonathan D. Embler, Dan E. Driemeyer
  • Patent number: 10183309
    Abstract: A continuous ceramic matrix composite strip is produced by passing a dry ceramic fiber strip through a ceramic slurry bath. Impregnation wheels within the bath guide the fiber strip through the bath and force the ceramic slurry into the fiber strip, thereby impregnating the strip. The impregnation wheels stir the ceramic slurry to maintain a homogeneous mixture. Air knives remove excess slurry from the strip. Thickness and width controls squeeze the impregnated strip to desired thickness and width dimensions.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: January 22, 2019
    Assignee: The Boeing Company
    Inventors: Richard Philip Topf, Kaia Elena David, Mary Margaret Litwinski, Steffan Walker Brown, Leanne L. Lehman
  • Publication number: 20180222157
    Abstract: A thermal protection system is provided for a vehicle substructure. The thermal protection system comprises an outer layer for protecting the vehicle substructure. The thermal protection system further comprises an inner layer for conforming to the vehicle substructure. The thermal protection system also comprises an insulation layer sandwiched between the inner and outer layers. The insulation layer includes a porous low-density ceramic insulating material having a densified portion that covers an inner surface of the outer layer to strengthen adhesion.
    Type: Application
    Filed: February 8, 2017
    Publication date: August 9, 2018
    Applicant: The Boeing Company
    Inventors: Vann Heng, Winnie W. Chen, Leanne L. Lehman, Patrick J. Mobers, Merna E. Salama, Thomas R. Pinney, Jonathan D. Embler, Dan E. Driemeyer
  • Patent number: 9545774
    Abstract: A method for reworking a ceramic structure. A portion of a first facesheet is removed from the ceramic structure to form a first aperture. The first facesheet comprises a number of layers of a first ceramic material. A portion of an inner section of the ceramic structure is removed to form a second aperture. The second aperture extends from the first aperture into the inner section. The inner section comprises a second ceramic material bonded to the first facesheet and has a lower density than the first facesheet. A ceramic replacement material is placed in the second aperture. A number of replacement ceramic layers are placed in the first aperture. Ceramic particles are placed between the first facesheet and the number of replacement ceramic layers. The ceramic particles are sintered to bond the number of replacement ceramic layers to the first facesheet.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: January 17, 2017
    Assignee: THE BOEING COMPANY
    Inventors: Sangvavann Heng, Leanne L. Lehman, Kaia Elena David, William Preston Keith, Van Ha Ngo
  • Patent number: 9475261
    Abstract: A thermal protection system including a plurality of layers. A first layer includes a passive insulation material. A second layer includes a phase change insulation material. A third layer is positioned between the first layer and the second layer to separate the passive insulation material from the phase change insulation material. A structural system extends through the first layer, the second layer, the third layer, or a combination thereof.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: October 25, 2016
    Assignee: THE BOEING COMPANY
    Inventors: Thomas R. Pinney, Jonathan D. Embler, James P. Ledesma, Jr., Leanne L. Lehman, Sangvavann Heng
  • Patent number: 9475593
    Abstract: A thermal protection system including a plurality of layers. A first layer includes a passive insulation material. A second layer includes a phase change insulation material. A third layer is positioned between the first layer and the second layer to separate the passive insulation material from the phase change insulation material.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: October 25, 2016
    Assignee: THE BOEING COMPANY
    Inventors: Thomas R. Pinney, Jonathan D. Embler, James P. Ledesma, Jr., Leanne L. Lehman, Sangvavann Heng
  • Publication number: 20160046098
    Abstract: A thermal protection system including a plurality of layers. A first layer includes a passive insulation material. A second layer includes a phase change insulation material. A third layer is positioned between the first layer and the second layer to separate the passive insulation material from the phase change insulation material. A structural system extends through the first layer, the second layer, the third layer, or a combination thereof.
    Type: Application
    Filed: November 4, 2014
    Publication date: February 18, 2016
    Inventors: Thomas R. Pinney, Jonathan D. Embler, James P. Ledesma, JR., Leanne L. Lehman, Sangvavann Heng
  • Publication number: 20160046396
    Abstract: A thermal protection system including a plurality of layers. A first layer includes a passive insulation material. A second layer includes a phase change insulation material. A third layer is positioned between the first layer and the second layer to separate the passive insulation material from the phase change insulation material.
    Type: Application
    Filed: August 18, 2014
    Publication date: February 18, 2016
    Inventors: Thomas R. Pinney, Jonathan D. Embler, James P. Ledesma, JR., Leanne L. Lehman, Sangvavann Heng
  • Patent number: 9248923
    Abstract: An apparatus comprises a thermal protection element, a number of washers, a ceramic layer, a number of blind fasteners, and a number of tabs. The thermal protection element has an upper surface, a lower surface, and a plurality of sides. The ceramic layer covers at least the plurality of sides of the thermal protection element. The number of tabs is connected to the number of sides by the number of blind fasteners secured to the ceramic layers. The tabs may be part of a frame secured to a groove around the plurality of sides.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: February 2, 2016
    Assignee: THE BOEING COMPANY
    Inventors: Thomas R. Pinney, Conley Siddoway Thatcher, Jonathan Embler, Kaia Elena David, Leanne L. Lehman, Edward A. Zadorozny
  • Patent number: 9005702
    Abstract: High-temperature fabrics with a coatings to provide oxidation protection at high temperatures, and capable of being formed into a variety of softgoods parts, and methods for their manufacture are disclosed.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: April 14, 2015
    Assignee: The Boeing Company
    Inventors: Adam J Lang, Leanne L Lehman, Vann Heng, Kenneth R Stempel
  • Publication number: 20140377510
    Abstract: An apparatus comprises a thermal protection element, a number of washers, a ceramic layer, a number of blind fasteners, and a number of tabs. The thermal protection element has an upper surface, a lower surface, and a plurality of sides. The ceramic layer covers at least the plurality of sides of the thermal protection element. The number of tabs is connected to the number of sides by the number of blind fasteners secured to the ceramic layers. The tabs may be part of a frame secured to a groove around the plurality of sides.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 25, 2014
    Applicant: The Boeing Company
    Inventors: Thomas R. Pinney, Conley Siddoway Thatcher, Jonathan Embler, Kaia Elena David, Leanne L. Lehman, Edward A. Zadorozny
  • Patent number: 8894919
    Abstract: A method for adding insulation or bulk absorbers into high temperature sandwich structures following fabrication is presented. A slurry of ceramic fibers and/or particles, opacified particles, fugitive fibers, organic binders and inorganic binders is prepared as an aqueous solution. The slurry is cast within a prepared sandwich structure, dried, and heated to form a low density ceramic core material to provide insulation or noise absorption. Following incorporation of the ceramic material, aerogels or phase change materials may also be added to provide additional thermal management benefits.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: November 25, 2014
    Assignee: The Boeing Company
    Inventors: Leanne L. Lehman, Vann Heng, James Philip Ledesma, Jr., Jonathan David Embler
  • Publication number: 20140248812
    Abstract: High-temperature fabrics with a coatings to provide oxidation protection at high temperatures, and capable of being formed into a variety of softgoods parts, and methods for their manufacture are disclosed.
    Type: Application
    Filed: September 28, 2012
    Publication date: September 4, 2014
    Applicant: THE BOEING COMPANY
    Inventors: Adam J. Lang, Leanne L. Lehman, Vann Heng, Kenneth R. Stempel
  • Patent number: 8752350
    Abstract: An apparatus comprises a thermal protection element, a number of washers, a ceramic layer, a number of blind fasteners, and a number of tabs. The thermal protection element has an upper surface, a lower surface, and a plurality of sides. The ceramic layer covers at least the plurality of sides of the thermal protection element. The number of tabs is connected to the number of sides by the number of blind fasteners secured to the ceramic layers. The tabs may be part of a frame secured to a groove around the plurality of sides.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: June 17, 2014
    Assignee: The Boeing Company
    Inventors: Thomas R. Pinney, Conley Siddoway Thatcher, Jonathan Embler, Kaia Elena David, Leanne L. Lehman, Edward A. Zadorozny
  • Patent number: 8458976
    Abstract: A blanket assembly includes a shear fabric and an attachment frame wrapped in the shear fabric. A thermal protection blanket is carried by the shear fabric.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: June 11, 2013
    Assignee: The Boeing Company
    Inventors: Winnie W Chen, Edward A Zadorozny, Conley S Thatcher, Jonathan D Embler, Leanne L Lehman, Thomas Pinney
  • Patent number: 8192570
    Abstract: A composite structure and an associated exhaust washed structure are provided which may be formed of ceramic matrix composite (CMC) materials. A method of fabricating a composite structure which may include the CMC material is also provided. A composite structure may include a corrugated septum extending in a lengthwise direction. The composite structure may also include a flute within which the corrugated septum is disposed to form, for example, a partitioned flute assembly.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: June 5, 2012
    Assignee: The Boeing Company
    Inventors: Michael L. Hand, Buddhadev Chakrabarti, Leanne L. Lehman, Gopal P. Mathur
  • Publication number: 20120066882
    Abstract: A composite structure and an associated exhaust washed structure are provided which may be formed of ceramic matrix composite (CMC) materials. A method of fabricating a composite structure which may include the CMC material is also provided. A composite structure may include a corrugated septum extending in a lengthwise direction. The composite structure may also include a flute within which the corrugated septum is disposed to form, for example, a partitioned flute assembly.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 22, 2012
    Applicant: THE BOEING COMPANY
    Inventors: Michael L. Hand, Buddhadev Chakrabarti, Leanne L. Lehman, Gopal P. Mathur
  • Patent number: 8097106
    Abstract: A ceramic matrix composite structure has a reinforced core for carrying loads. The core includes a web connected between the facesheets by edge bonded joints for transmitting compressive, tensile and shear loads. The edge bonded joints are laterally reinforced by bridging members bonded to the facesheets, on opposite sides of the webs The bridging members may comprise low density, high temperature rigid foam.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: January 17, 2012
    Assignee: The Boeing Company
    Inventors: Michael L. Hand, Leanne L. Lehman, Miklos P. Petervary
  • Patent number: 8043690
    Abstract: A composite structure and an associated exhaust washed structure are provided which may be formed of ceramic matrix composite (CMC) materials. A method of fabricating a composite structure which may include the CMC material is also provided. A composite structure may include a corrugated septum extending in a lengthwise direction. The composite structure may also include a flute within which the corrugated septum is disposed to form, for example, a partitioned flute assembly.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: October 25, 2011
    Assignee: The Boeing Company
    Inventors: Michael L. Hand, Buddhadev Chakrabarti, Leanne L. Lehman, Gopal P. Mathur
  • Publication number: 20110252742
    Abstract: A ceramic matrix composite structure has a reinforced core for carrying loads. The core includes a web connected between the facesheets by edge bonded joints for transmitting compressive, tensile and shear loads. The edge bonded joints are laterally reinforced by bridging members bonded to the facesheets, on opposite sides of the webs. The bridging members may comprise low density, high temperature rigid foam.
    Type: Application
    Filed: June 30, 2011
    Publication date: October 20, 2011
    Applicant: THE BOEING COMPANY
    Inventors: Michael L. Hand, Leanne L. Lehman, Miklos P. Petervary