Patents by Inventor David Thomas Ryan

David Thomas Ryan 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: 20150071541
    Abstract: An apparatus, computer-readable medium, and computer-implemented method for identifying, classifying, and utilizing object information in one or more image includes receiving an image including a plurality of objects, segmenting the image to identify one or more objects in the plurality of objects, analyzing the one or more objects to determine one or more morphological metrics associated with each of the one or more objects, determining the connectivity of the one or more objects to each other based at least in part on a graphical analysis of the one or more objects, and mapping the connectivity of the one or more objects to the morphological metrics associated with the one or more objects.
    Type: Application
    Filed: August 13, 2014
    Publication date: March 12, 2015
    Inventors: Amina Ann Qutub, David Thomas Ryan, Byron Lindsay Long, Rebecca Zaunbrecher, Chenyue Hu, John Hundley Slater, Jingzhe Hu
  • Patent number: 8033121
    Abstract: A low eddy current cryogen circuit for superconducting magnets including at least a first cooling coil made of an electrically conducting material and having at least one electrical isolator incorporated in the first cooling coil. The electrical isolator is located to inhibit induced eddy current loops due to inductive coupling of the first cooling coil with eddy current inducing field sources.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: October 11, 2011
    Assignee: General Electric Company
    Inventors: Xianrui Huang, Paul Shadforth Thompson, David Thomas Ryan, Gregory Alan Lehmann, Timothy John Havens
  • Publication number: 20100242500
    Abstract: The present invention provides an apparatus and method for automatically disconnecting a cryocooler from a cold mass reservoir of a MR system. A cryocooler thermal link includes a first end plate configured to be thermally connected to a cryocooler and a second end plate configured to be thermally connected to a cold mass. A wall encloses a space between the first and the second end plates, the wall having a first end attached to the first end plate and a second end attached to the second end plate. A working fluid is positioned in the space.
    Type: Application
    Filed: September 8, 2006
    Publication date: September 30, 2010
    Inventors: Evangelos T. Laskaris, Kathleen M. Amm, David Thomas Ryan, Xianrui Huang, J. Anne Ryan
  • Publication number: 20090033450
    Abstract: A low eddy current cryogen circuit for superconducting magnets including at least a first cooling coil made of an electrically conducting material and having at least one electrical isolator incorporated in the first cooling coil. The electrical isolator is located to inhibit induced eddy current loops due to inductive coupling of the first cooling coil with eddy current inducing field sources.
    Type: Application
    Filed: October 7, 2008
    Publication date: February 5, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Xianrui Huang, Paul Shadforth Thompson, David Thomas Ryan, Gregory Alan Lehmann, Timothy John Havens
  • Patent number: 7464558
    Abstract: A low eddy current cryogen circuit for superconducting magnets including at least a first cooling coil made of an electrically conducting material and having at least one electrical isolator incorporated in the first cooling coil. The electrical isolator is located to inhibit induced eddy current loops due to inductive coupling of the first cooling coil with eddy current inducing field sources.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: December 16, 2008
    Assignee: General Electric Company
    Inventors: Xianrui Huang, Paul Shadforth Thompson, David Thomas Ryan, Gregory Alan Lehmann, Timothy John Havens
  • Patent number: 7342757
    Abstract: A system and method for protecting a superconductor from a quench condition. A quench protection system is provided to protect the superconductor from damage due to a quench condition. The quench protection system comprises a voltage detector operable to detect voltage across the superconductor. The system also comprises a frequency filter coupled to the voltage detector. The frequency filter is operable to couple voltage signals to a control circuit that are representative of a rise in superconductor voltage caused by a quench condition and to block voltage signals that are not. The system is operable to detect whether a quench condition exists in the superconductor based on the voltage signal received via the frequency filter and to initiate a protective action in response.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: March 11, 2008
    Assignee: General Electric Company
    Inventors: Xianrui Huang, Kiruba Haran Sivasubramaniam, James William Bray, David Thomas Ryan
  • Patent number: 7319327
    Abstract: A Magnetic Resonance Imaging (MRI) system having a vacuum vessel positioned about an imaging volume, one or more high temperature superconducting coils positioned within the vacuum vessel, and a cryocooler coupled to the vacuum vessel to operate the superconducting coil at a temperature above 10 K. At least one gradient coil is positioned between an imaging volume and the superconducting coil without any thermal shielding interposed between the gradient coil and the superconducting coil. A method of forming an MRI system includes forming at least one winding of the main field generating coils with high temperature superconducting material, positioning the winding in a vessel for receiving cryogenic fluid, and positioning a gradient coil between the imaging volume and the winding without placing a thermal radiation shield between the gradient coil and the winding.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: January 15, 2008
    Assignee: General Electric Company
    Inventors: J. Anne Ryan, legal representative, Evangelos Trifon Laskaris, Kathleen Melanie Amm, Bruce Alan Knudsen, Judson Sloan Marte, Thomas Robert Raber, Robert John Zabala, James William Bray, Bruce Campbell Amm, Sergio Paulo Martins Loureiro, David Thomas Ryan, deceased
  • Patent number: 7053509
    Abstract: A rotating machine comprising a superconductive coil and a temperature sensor operable to provide a signal representative of superconductive coil temperature. The rotating machine may comprise a control system communicatively coupled to the temperature sensor. The control system may be operable to reduce electric current in the superconductive coil when a signal representative of a defined superconducting coil temperature is received from the temperature sensor.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: May 30, 2006
    Assignee: General Electric Company
    Inventors: David Thomas Ryan, Evangelos Trifon Laskaris, Xianrui Huang
  • Patent number: 6900714
    Abstract: A system and method for protecting a superconductor. The system may comprise a current sensor operable to detect a current flowing through the superconductor. The system may comprise a coolant temperature sensor operable to detect the temperature of a cryogenic coolant used to cool the superconductor to a superconductive state. The control circuit is operable to estimate the superconductor temperature based on the current flow and the coolant temperature. The system may also be operable to compare the estimated superconductor temperature to at least one threshold temperature and to initiate a corrective action when the superconductor temperature exceeds the at least one threshold temperature.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: May 31, 2005
    Assignee: General Electric Company
    Inventors: Xianrui Huang, Evangelos Trifon Laskaris, Kiruba Haran Sivasubramaniam, James William Bray, David Thomas Ryan, James Michael Fogarty, Albert Eugene Steinbach
  • Patent number: 6806432
    Abstract: A method of heat treating a coil (14) for use as a superconducting coil. The coil (14) is heated in a furnace, the temperature of the furnace being controlled to perform a predetermined heating cycle. A current is passed through the coil (14) for at least a portion of the heating cycle so as to further heat the coil by resistance heating.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: October 19, 2004
    Assignee: Oxford Instruments Superconductivity Limited
    Inventors: David Thomas Ryan, Martin Norman Wilson