Patents by Inventor David Littlejohn

David Littlejohn 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).

  • Publication number: 20200277085
    Abstract: A bond fixture including a plurality of supports mounted about a surface. At least one of the plurality of supports includes a vertical member and a hand crank operable to adjust a position of the vertical member. A first fixture is disposed at an end of the bond fixture and is movable relative to the surface. The first fixture includes a base and a support extending from the base. A second fixture includes a first member and a second member movably coupled. A fastener extending between the first member and the second member controls relative movement of the first member and the second member to define an opening there between. Each of the first member and the second member includes a plate having a heater formed therein.
    Type: Application
    Filed: May 15, 2020
    Publication date: September 3, 2020
    Inventors: Scott Oren Smith, David Littlejohn, Sven Roy Lofstrom
  • Patent number: 10703509
    Abstract: A bond fixture including a plurality of supports mounted about a surface. At least one of the plurality of supports includes a vertical member and a hand crank operable to adjust a position of the vertical member. A first fixture is disposed at an end of the bond fixture and is movable relative to the surface. The first fixture includes a base and a support extending from the base. A second fixture includes a first member and a second member movably coupled. A fastener extending between the first member and the second member controls relative movement of the first member and the second member to define an opening there between. Each of the first member and the second member includes a plate having a heater formed therein.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: July 7, 2020
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Scott Oren Smith, David Littlejohn, Sven Roy Lofstrom
  • Patent number: 10647410
    Abstract: A spinner assembly includes a cone-shaped member having a plurality of blade openings. The cone-shaped member is receivable about a shaft at a first location. A bulkhead frame is connected to the cone-shaped member. At least one strut is configured to couple the bulkhead frame to the shaft at a second location. The at least one strut includes at least one arm having a longitudinal rigid member and at least one flexure region that defines an axis about which the at least one arm bends.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: May 12, 2020
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Robert Higbie, David Littlejohn
  • Patent number: 10569906
    Abstract: A method of making a rotor blade assembly includes receiving a sheath assembly and a blade body at a blade assembly tool. The sheath assembly is spread by applying force to an interior surface of the sheath assembly. The blade body is inserted within the interior of the sheath assembly, registered with the sheath assembly, and the force removed from the interior surface of the sheath assembly such that the sheath assembly collapses on the blade body.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: February 25, 2020
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: David Littlejohn, Sven Roy Lofstrom, Eric C. Boyle
  • Publication number: 20200001347
    Abstract: A bond fixture includes a frame that defines a chamber for receiving a component. At least one bladder assembly is mounted to the frame and extends into the chamber to apply a pressure to an adjacent surface of the component. A caul assembly is positionable about the component and receivable within the chamber. The caul assembly heats a localized portion of the component.
    Type: Application
    Filed: September 11, 2019
    Publication date: January 2, 2020
    Inventors: Sven Roy Lofstrom, David Littlejohn, Scott Oren Smith
  • Publication number: 20190390697
    Abstract: An installation tool includes a motor portion and a nose portion. The nose portion includes an opening for receiving a fastener. The nose portion includes a roller cages. The roller cages include a plurality of rollers. The plurality of rollers includes at least two rollers that are offset from other rollers of the plurality of rollers. The nose portion may include a first portion that is selectively attachable to a second portion.
    Type: Application
    Filed: June 24, 2019
    Publication date: December 26, 2019
    Inventors: David Littlejohn, James Mitchell
  • Publication number: 20190367187
    Abstract: A holding fixture includes a first blade support assembly and a second blade support assembly. The second blade support assembly is spaced at a distance from the first blade support assembly and includes a base plate removably mounted to a milling machine, an adjustable conic support connectable to the base plate via a spacer block, and a blade adjustment assembly movable to control a pressure applied by the blade adjustment assembly.
    Type: Application
    Filed: August 13, 2019
    Publication date: December 5, 2019
    Inventors: Sven Roy Lofstrom, David Littlejohn
  • Publication number: 20190367188
    Abstract: A bond fixture includes a frame defining a chamber for receiving a component. At least one bladder assembly is connected to the frame. The at least one bladder assembly includes a pad for contacting the component. A position of the pad relative to the component is controlled by a pressure of the bladder assembly. A caul assembly is adapted to thermally couple to the component to heat a localized portion of the component.
    Type: Application
    Filed: August 20, 2019
    Publication date: December 5, 2019
    Inventors: David Littlejohn, Sven Roy Lofstrom
  • Patent number: 10456823
    Abstract: A bond fixture includes a frame that defines a chamber for receiving a component. At least one bladder assembly is mounted to the frame and extends into the chamber to apply a pressure to an adjacent surface of the component. A caul assembly is positionable about the component and receivable within the chamber. The caul assembly heats a localized portion of the component.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: October 29, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Sven Roy Lofstrom, David Littlejohn, Scott Oren Smith
  • Patent number: 10435178
    Abstract: A holding fixture includes a first blade support assembly and a second blade support assembly. The second blade support assembly is spaced at a distance from the first blade support assembly and includes a base plate removably mounted to a milling machine, an adjustable conic support connectable to the base plate via a spacer block, and a blade adjustment assembly movable to control a pressure applied by the blade adjustment assembly.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: October 8, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Sven Roy Lofstrom, David Littlejohn
  • Patent number: 10421560
    Abstract: A bond fixture includes a frame defining a chamber for receiving a component. At least one bladder assembly is connected to the frame. The at least one bladder assembly includes a pad for contacting the component. A position of the pad relative to the component is controlled by a pressure of the bladder assembly. A caul assembly is adapted to thermally couple to the component to heat a localized portion of the component.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: September 24, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: David Littlejohn, Sven Roy Lofstrom
  • Publication number: 20190241261
    Abstract: A bond fixture for bonding a component includes a frame defining a chamber for receiving the component. A first pad and a second pad are mounted to the frame. At least one of the first pad and the second pad is movable relative to the frame to adjust a pressure applied to the component. A caul assembly is adapted to be disposed in thermal communication with the component. The caul assembly heats a localized portion of the component.
    Type: Application
    Filed: April 17, 2019
    Publication date: August 8, 2019
    Inventors: Sven Roy Lofstrom, David Littlejohn, Eric Boyle
  • Publication number: 20190225329
    Abstract: A bond fixture includes a first fixture having a heater and a plurality of clamps. Each of the plurality of clamps includes a first member and a second member rotatable between a first position and a second position. A second fixture includes a root end lift translatable vertically between a retracted position and an extended position and a root end clamp translatable along a horizontal axis. The root end clamp is configured to cooperate with the root end.
    Type: Application
    Filed: April 3, 2019
    Publication date: July 25, 2019
    Inventors: Sven Roy Lofstrom, David Littlejohn, Eric Boyle, Scott Oren Smith
  • Patent number: 10301013
    Abstract: A bond fixture for bonding a component includes a frame defining a chamber for receiving the component. A first pad and a second pad are mounted to the frame. At least one of the first pad and the second pad is movable relative to the frame to adjust a pressure applied to the component. A caul assembly is adapted to be disposed in thermal communication with the component. The caul assembly heats a localized portion of the component.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: May 28, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Sven Roy Lofstrom, David Littlejohn, Eric Boyle
  • Patent number: 10287008
    Abstract: A bond fixture includes a first fixture having a heater and a plurality of clamps. Each of the plurality of clamps includes a first member and a second member rotatable between a first position and a second position. A second fixture includes a root end lift translatable vertically between a retracted position and an extended position and a root end clamp translatable along a horizontal axis. The root end clamp is configured to cooperate with the root end.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: May 14, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Sven Roy Lofstrom, David Littlejohn, Eric Boyle, Scott Oren Smith
  • Patent number: 10285654
    Abstract: A system and method are provided for displaying information related to a medical imaging scan. Visual regions are shown on a display screen to indicate information of pending, current, and completed medical imaging scans. If additional correction time was utilized for particular table positions in a medical imaging scan, this information is shown on the display screen, in the form of icons, shading, or other visual representations. The medical imaging system may include positron emission tomography (PET) and single photon emission computed tomography (SPECT).
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: May 14, 2019
    Assignee: General Electric Company
    Inventors: Jeremy Huston, David Littlejohn, Scott Wollenweber, Joseph Muth
  • Publication number: 20190135421
    Abstract: A rotor blade disassembly method includes applying spanwise support to a rotor blade body and heating a bond disposed on an end of the rotor blade body. The method also includes removing the spanwise support from the rotor blade body and exerting shear stress on the bond using weight of the rotor blade body. A blade disassembly system is also described.
    Type: Application
    Filed: December 21, 2018
    Publication date: May 9, 2019
    Inventors: Ryan Lehto, Eric C. Boyle, Sven R. Lofstrom, David Littlejohn
  • Patent number: 10259595
    Abstract: A root end spar plate closure tool includes a spar plate compression assembly for applying compressive force to a spar plate, a first flange extending from the spar plate compression assembly and including at least one pin opening, and a second flange extending from the spar plate compression assembly and including at least one pin opening. The first flange and the second flange define a blade root gap sized to receive a blade root.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: April 16, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Scott Oren Smith, David Littlejohn
  • Patent number: 10196140
    Abstract: A rotor blade disassembly method includes applying spanwise support to a rotor blade body and heating a bond disposed on an end of the rotor blade body. The method also includes removing the spanwise support from the rotor blade body and exerting shear stress on the bond using weight of the rotor blade body. A blade disassembly system is also described.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: February 5, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Ryan Lehto, Eric C. Boyle, Sven R. Lofstrom, David Littlejohn
  • Publication number: 20180141686
    Abstract: A system for packaging includes a continuous flow wrap machine, a product reader, and a labeling unit. The product reader is configured to sense each product of the series of products transported on the infeed conveyor of the continuous flow wrap machine and to provide detected information for facilitating access to unique product information associated with each sensed product of the series of products. The labeling unit is adapted to apply visual representation of the unique product information to the tube formed in the continuous flow wrap machine while the tube is moving or to the resulting packaged product while the packaged product is moving.
    Type: Application
    Filed: May 4, 2016
    Publication date: May 24, 2018
    Inventors: Russell T. Christman, David Littlejohn, Gary Wood, James Michaelian, Thomas P. Orsini, Michael A. Kalinowski, John Gilbert