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: 20180093761
    Abstract: A bond fixture includes a first frame defining a chamber configured to receive a leading edge of a rotor blade and a second frame pivotally coupled to the first frame. The second frame is movable between a first position and a second position. In the second position, the second frame restricts movement of the bond fixture relative to the rotor blade. At least one supporting assembly extends from the first frame towards the chamber. The at least one supporting assembly is adjustable to apply a pressure to an adjacent surface of the rotor blade.
    Type: Application
    Filed: September 30, 2016
    Publication date: April 5, 2018
    Inventors: David Littlejohn, Sven Roy Lofstrom, Scott Oren Smith
  • Publication number: 20180093782
    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: September 30, 2016
    Publication date: April 5, 2018
    Inventors: Sven Roy Lofstrom, David Littlejohn
  • Publication number: 20180093784
    Abstract: A bond fixture includes a support structure and a first assembly coupled to the support structure. The first assembly includes a frame defining a chamber and a first pressure pad and second pressure pad coupled to the frame opposite one another and positioned within the chamber. The second pressure pad is movable to control a pressure applied by the first pressure pad and the second pressure pad.
    Type: Application
    Filed: September 30, 2016
    Publication date: April 5, 2018
    Inventors: David Littlejohn, Sven Roy Lofstrom, Scott Oren Smith
  • Publication number: 20180086485
    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: Application
    Filed: September 26, 2016
    Publication date: March 29, 2018
    Inventors: Scott Oren Smith, David Littlejohn
  • Publication number: 20180044039
    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: August 9, 2016
    Publication date: February 15, 2018
    Inventors: Sven Roy Lofstrom, David Littlejohn, Eric Boyle, Scott Oren Smith
  • Publication number: 20180044038
    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: August 9, 2016
    Publication date: February 15, 2018
    Inventors: Scott Oren Smith, David Littlejohn, Sven Roy Lofstrom
  • Publication number: 20180044036
    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: August 9, 2016
    Publication date: February 15, 2018
    Inventors: Sven Roy Lofstrom, David Littlejohn, Eric Boyle
  • Publication number: 20180043418
    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: August 9, 2016
    Publication date: February 15, 2018
    Inventors: Sven Roy Lofstrom, David Littlejohn, Scott Oren Smith
  • Publication number: 20180044037
    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 9, 2016
    Publication date: February 15, 2018
    Inventors: David Littlejohn, Sven Roy Lofstrom
  • Publication number: 20180029692
    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: Application
    Filed: August 1, 2016
    Publication date: February 1, 2018
    Inventors: Robert Higbie, David Littlejohn
  • Publication number: 20180002038
    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: Application
    Filed: June 30, 2016
    Publication date: January 4, 2018
    Inventors: David Littlejohn, Sven Roy Lofstrom, Eric C. Boyle
  • Publication number: 20170291724
    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: April 12, 2016
    Publication date: October 12, 2017
    Inventors: Ryan Lehto, Eric C. Boyle, Sven R. Lofstrom, David Littlejohn
  • Publication number: 20160354047
    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: Application
    Filed: June 3, 2015
    Publication date: December 8, 2016
    Inventors: Jeremy Huston, David Littlejohn, Scott Wollenweber, Joseph Muth
  • Publication number: 20140230701
    Abstract: A new design for a low swirl burner is disclosed in which natural draft rather than a motorized pump is used to move a fuel-air mixture through the burner. This new design enables the burn off of gas at refineries in an environment where electric motors cannot be used because of the potential for sparks, which could trigger explosions. Additional modifications to the burner, including the introduction of flue gas to the burner allows for the reduction of NOx gas to meet current emission control targets, without the need for further post combustion emission control systems.
    Type: Application
    Filed: April 6, 2012
    Publication date: August 21, 2014
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Robert K. Cheng, David Littlejohn
  • Publication number: 20140201624
    Abstract: Certain embodiments of the present application allow a user to preview a plurality of cards on a portable computing device, select a card from the plurality of cards, and modify the selected card. One example method of operation may include accessing a customizable data input templates stored in memory, selecting one of the customizable data input templates, inputting data to incorporate into the selected customizable data input template and transmitting the data to the remote server to be saved. The changes may be presented to the user in a preview with the inputted data overlaid on the predefined area of the customizable data input template, the preview may permit an acceptance option to finalize or reject the customizable data input template. The finalized customizable data input template may be saved as an acceptance message is received.
    Type: Application
    Filed: May 1, 2013
    Publication date: July 17, 2014
    Applicant: Felt LLC
    Inventors: Andrew Clark, Tomer Alpert, David Littlejohn
  • Publication number: 20070214017
    Abstract: Apparatus includes an imaging system with a user interface, and a hospital radiological information system (RIS) coupled to the imaging system such that the user interface allows for bi-directional data transfer between the imaging system and the RIS.
    Type: Application
    Filed: March 13, 2006
    Publication date: September 13, 2007
    Inventors: Mark Profio, Sang Lee, David Littlejohn, Scott Zimmerman, Holly McDaniel, Susan Stuebe, Patrick Virtue, Scott Robinson, Ann Hole, Christopher Proctor
  • Publication number: 20040024303
    Abstract: A universal interface apparatus for use with any of several different imaging systems for facilitating a plurality of different imaging modalities, the interface including at least function icons in a function navigation space and a workspace, each of the function icons corresponding to a process which is common among all of the imaging modalities, the interface Also accessing data tables corresponding to specific workflow protocols for medical facility radiologists and/or for a medical facility in general, the tables identifying function icons and other icons for guiding a technologist through a properly orchestrated imaging process.
    Type: Application
    Filed: July 3, 2003
    Publication date: February 5, 2004
    Inventors: Seth R. Banks, James K. Cavanaugh, Thomas M. Hanson, Linda M. Kohli, Elizabeth A. Kuhn, David A. Littlejohn, Kim M. Ruchti, Aaron J. Schmidt, William M. Stoval
  • Patent number: 6674449
    Abstract: A universal interface apparatus for use with any of several different imaging systems for facilitating a plurality of different imaging modalities, the interface including at least function icons in a function navigation space and a workspace, each of the function icons corresponding to a process which is common among all of the imaging modalities, the interface also accessing data tables corresponding to specific workflow protocols for medical facility radiologists and/or for a medical facility in general, the tables identifying function icons and other icons for guiding a technologist through a properly orchestrated imaging process.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: January 6, 2004
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Seth R. Banks, James K. Cavanaugh, Thomas M. Hanson, Linda M. Kohli, Elizabeth A. Kuhn, David A. Littlejohn, Kim M. Ruchti, Aaron J. Schmidt, William M. Stoval
  • Patent number: 5658545
    Abstract: The present invention relates to a process of using metal particles to reduce NO to NH.sub.3. More specifically, the invention concerns an improved process to regenerate iron (II) (CHELATE) by reduction of iron (II) (CHELATE) (NO) complex, which process comprises: a) contacting an aqueous solution containing iron (II) (CHELATE) (NO) with metal particles at between about 20.degree. and 90.degree. C. to reduce NO present, produce ammonia or an ammonium ion, and produce free iron (II) (CHELATE) at a pH of between about 3 and 8. The process is useful to remove NO from flue gas and reduce pollution.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: August 19, 1997
    Assignee: The Regents of California
    Inventors: Shih-Ger Chang, David Littlejohn, Yao Shi
  • Patent number: 4837361
    Abstract: The present invention in one aspect relates to a process for the simultaneous removal of NO.sub.x and SO.sub.2 from a fluid stream comprising mixtures thereof and in another aspect relates to the separation, use and/or regeneration of various chemicals contaminated or spent in the process and which includes the steps of:(A) contacting the fluid stream at a temperature of between about 105.degree. and 180.degree. C.
    Type: Grant
    Filed: November 18, 1987
    Date of Patent: June 6, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Shih-Ger Chang, David K. Liu, Elizabeth A. Griffiths, David Littlejohn