Patents by Inventor Richard T. Thornton

Richard T. Thornton 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: 20190352017
    Abstract: A generator control unit includes a plurality of permanent magnet generator (PMG) inputs, a transformer including a multi-configuration input winding and at least one output winding. Each PMG input in the plurality of PMG inputs is connected to the multi-configuration input winding at a corresponding input winding input.
    Type: Application
    Filed: May 17, 2018
    Publication date: November 21, 2019
    Inventors: Daniel Knope, Christopher Derek Thornton, Richard T. Wetzel, Christopher Gillette, Benjamin Fisher, Timothy Arn Goodrich, Adrian E. Vandergrift, Dana A. Sievert
  • Publication number: 20160349291
    Abstract: A method for determining a value of a parameter of an object or an environment includes positioning a device having a balanced circuit in or on an object or within a particular environment, wherein the balanced circuit comprises elements which are operationally sensitive to changes in a parameter of the object or the environment. The method further includes measuring a common mode signal of the balanced circuit and determining, from the common mode signal, a value of the parameter. An exemplary implementation of the method includes determining temperature using a resistive sensor having a Wheatstone bridge circuit with two variable resistors and two fixed resistors. Embodiments of systems and devices configured to employ such methods are provided, particularly medical probes, electronic signal monitoring devices, and systems employing such devices.
    Type: Application
    Filed: August 10, 2016
    Publication date: December 1, 2016
    Inventors: Huntly D. Millar, Richard T. Thornton, Robert L. Pauly
  • Patent number: 9429479
    Abstract: A method for determining a value of a parameter of an object or an environment includes positioning a device having a balanced circuit in or on an object or within a particular environment, wherein the balanced circuit comprises elements which are operationally sensitive to changes in a parameter of the object or the environment. The method further includes measuring a common mode signal of the balanced circuit and determining, from the common mode signal, a value of the parameter. An exemplary implementation of the method includes determining temperature using a resistive sensor having a Wheatstone bridge circuit with two variable resistors and two fixed resistors. Embodiments of systems and devices configured to employ such methods are provided, particularly medical probes, electronic signal monitoring devices, and systems employing such devices.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: August 30, 2016
    Assignee: Millar Instruments
    Inventors: Huntly D. Millar, Richard T. Thornton, Robert L. Pauly
  • Publication number: 20140023112
    Abstract: A method for determining a value of a parameter of an object or an environment includes positioning a device having a balanced circuit in or on an object or within a particular environment, wherein the balanced circuit comprises elements which are operationally sensitive to changes in a parameter of the object or the environment. The method further includes measuring a common mode signal of the balanced circuit and determining, from the common mode signal, a value of the parameter. An exemplary implementation of the method includes determining temperature using a resistive sensor having a Wheatstone bridge circuit with two variable resistors and two fixed resistors. Embodiments of systems and devices configured to employ such methods are provided, particularly medical probes, electronic signal monitoring devices, and systems employing such devices.
    Type: Application
    Filed: July 18, 2012
    Publication date: January 23, 2014
    Applicant: MILLAR INSTRUMENTS
    Inventors: Huntly D. Millar, Richard T. Thornton, Robert L. Pauly
  • Patent number: 7090635
    Abstract: Methods and apparatuses for positioning a radiation source in vivo relative to radio-opaque markers on a catheter that delineate a therapeutic treatment length so that a therapeutic dose of radiation is delivered along the therapeutic treatment length.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: August 15, 2006
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Michelle N. Ledesma, Anthony J. Bradshaw, Richard T. Thornton, J. Eric Henckel
  • Publication number: 20030199848
    Abstract: Methods and apparatuses for positioning a radiation source in vivo relative to radio-opaque markers on a catheter that delineate a therapeutic treatment length so that a therapeutic dose of radiation is delivered along the therapeutic treatment length.
    Type: Application
    Filed: May 28, 2003
    Publication date: October 23, 2003
    Inventors: Michelle N. Ledesma, Anthony J. Bradshaw, Richard T. Thornton, J. Eric Henckel
  • Patent number: 6585634
    Abstract: A force sensing mechanism. The mechanism is provided with a beam having a stationary portion. A housing accommodates a portion of a device coupled to an afterloader and is coupled to the beam. A force sensor coupled to the beam monitors a force of the device. An afterloader system includes a processor and a cartridge to house the force sensing mechanism. In a method, the force sensing mechanism is provided to which a portion of a device coupled to an afterloader is coupled. A device force of the device is monitored.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: July 1, 2003
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: John Eric Henckel, Richard T. Thornton, JoLynn R. Thornton, Anthony J. Bradshaw
  • Patent number: 6582417
    Abstract: Methods and apparatuses for positioning a radiation source in vivo relative to radio-opaque markers on a catheter that delineate a therapeutic treatment length so that a therapeutic dose of radiation is delivered along the therapeutic treatment length.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: June 24, 2003
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Michelle N. Ledesma, Anthony J. Bradshaw, Richard T. Thornton, J. Eric Henckel
  • Patent number: 6422988
    Abstract: Apparatus and methods are disclosed for treating a stenosed region of a blood vessel such as a coronary artery by use of a single catheter for balloon angioplasty followed by delivery of a controlled inherently uniform dosage of radiation to the blood vessel wall to deter restenosis at the angioplasty site. In one embodiment, an angioplasty balloon catheter is adapted to have its balloon emptied after the angioplasty and then re-filled with radioactive fluid to re-engage the blood vessel wall at the angioplasty site. Another embodiment has a conventional angioplasty balloon surrounded by a radiotherapy treatment balloon that is separately inflatable with radioactive fluid. Partly filling the angioplasty balloon during the radiation treatment minimizes the volume of radioactive fluid necessary to achieve the desired dosage. In either embodiment, an outer containment balloon may be used to capture radioactive fluid that would otherwise escape if the treatment balloon were to rupture.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: July 23, 2002
    Inventors: Anthony J. Bradshaw, Richard T. Thornton, Wayne W. Snyder
  • Patent number: 6061588
    Abstract: A method and apparatus for positioning a radioactive portion of a wire at one or more positions within the lumen of a guide catheter, such as for intravascular radiotherapy, are disclosed. The method and the apparatus provide for better positioning the radioactive portion in light of bunching of the wire within the lumen during insertion. A computerized controller uses a monitoring device to control an afterloader's insertion and withdrawal of the wire into the guide catheter. The guide catheter includes a sensor at its distal end, the sensor being an electrical contact having conductive surfaces exposed within the lumen and outside the guide catheter. The wire is electrically conductive, and is configured to come into contact with the sensor's conductive surface within the lumen when the wire is fully inserted into the lumen. The monitoring device includes one lead connected to the wire and a second lead connected to the subject's body.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: May 9, 2000
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Richard T. Thornton, Ross Baker
  • Patent number: 6053858
    Abstract: A radiation source for invasive medical treatment, such as intracoronary radiotherapy or other such intravascular radiotherapy, is described. The radiation source includes a thread extending longitudinally within a sleeve. The sleeve is a hollow circular cylinder, sealed at either end, made from a polyimide resin, and is configured such that it is sufficiently flexible enough to be used for intravascular radiotherapy. A plurality of laser-drilled holes are configured in an evenly spaced pattern along the sleeve, and promote uniform liquid evaporation from within the sleeve. The thread is comprised of twelve rayon filaments wound in a helical fashion, which extend longitudinally through the sleeve and are anchored in the seals at either end of the sleeve. A radioactive isotope is formed into a coating on surfaces within the sleeve.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: April 25, 2000
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Kenneth M. Bueche, Anthony J. Bradshaw, Richard T. Thornton
  • Patent number: 6048300
    Abstract: A compact cartridge for an afterloader includes a housing containing a radioactive sourcewire and a dummy test wire, each accommodated in a helical groove on the periphery of a wire storage drum. The wires are contained in the grooves by low friction bearings, such as rollers, so that advancement of the wire from the drum is under very low friction conditions. The cartridge is removably inserted in the head of an afterloader apparatus and engages a primary drive system and an emergency retract mechanism mounted in the head. The cartridge also contains an electronics board with software for updating the software in the control electronics for the afterloader.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: April 11, 2000
    Assignee: Guidant Corporation
    Inventors: Richard T. Thornton, Richard V. Calfee, John P. Edison, Kenneth M. Bueche, Edward N. Kite
  • Patent number: 5971909
    Abstract: Apparatus and methods are provided for relieving a stenosed region of a blood vessel such as a coronary artery using a single catheter that relieves the angioplasty by conventional means and then delivers an easily controllable inherently uniform dosage of radiation to the walls of a blood vessel for preventing restenosis after angioplasty. An embodiment of the apparatus comprises a catheter having an angioplasty balloon that is inflatable with a liquid containing a suspended radioactive material such as .sup.125 I or .sup.32 P. The balloon is surrounded by a membrane to capture the radioactive liquid in the event the balloon ruptures. The catheter is advanced through the patient until the balloon is disposed in the stenosed region of the blood vessel.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: October 26, 1999
    Assignee: NeoCardia LLC
    Inventors: Anthony J. Bradshaw, Richard T. Thornton, Wayne W. Snyder
  • Patent number: 5957829
    Abstract: A radiotherapy apparatus is disclosed in which a radioactive-tipped source wire is accurately and precisely positioned within an implantable catheter. Embedded within the source wire, adjacent to its distal tip, is a ferrous ball, and a special magnetic sensor assembly is configured to sense the retraction of the source wire to a predetermined home position by sensing the proximity of the embedded ferrous ball.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: September 28, 1999
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventor: Richard T. Thornton
  • Patent number: 5851172
    Abstract: An afterloader for use in radiation oncology or intravascular radiotherapy comprises a wire storage mechanism for storing a radioactive-tipped sourcewire, a drive mechanism for advancing the sourcewire into a catheter or other channel implanted in a patient. A computer control system receives information from an encoder and a force sensor, which monitor the displacement of and the force exerted on the sourcewire, respectively. The displacement and force information are used to advance the wire at the fastest possible speed to the treatment site without exceeding a pre-programmed force profile designed to ensure the sourcewire does not puncture the catheter. The force profile is dynamic depending on the particular catheter being used, and catheter information may be inputted into the computer controller using a bar code or other information storage means in the catheter itself.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: December 22, 1998
    Assignee: Omnitron International, Inc.
    Inventors: Kenneth M. Bueche, Richard T. Thornton, Anthony J. Bradshaw
  • Patent number: 5662580
    Abstract: Apparatus and methods are provided for relieving a stenosed region of a blood vessel such as a coronary using a single catheter that relieves the angioplasty by conventional means and then delivers an easily controllable inherently uniform dosage of radiation to the walls of a blood vessel for preventing restenosis after angioplasty. An embodiment of the apparatus comprises a catheter having an angioplasty balloon that is inflatable with a liquid containing a suspended radioactive material such as .sup.125 I or .sup.32 P. The balloon is surrounded by a membrane to capture the radioactive liquid in the event the balloon ruptures. The catheter is advanced through the patient until the balloon is disposed in the stenosed region of the blood vessel.
    Type: Grant
    Filed: February 10, 1995
    Date of Patent: September 2, 1997
    Assignee: NeoCardia, LLC
    Inventors: Anthony J. Bradshaw, Richard T. Thornton, Wayne W. Snyder
  • Patent number: 5616114
    Abstract: Apparatus and methods are provided for delivering an easily controllable inherently uniform dosage of radiation to the walls of a blood vessel for preventing restenosis after angioplasty. The apparatus comprises a catheter having a balloon tip which is inflatable with a liquid containing a suspended radioactive material such as .sup.125 l or .sup.32 P. The catheter is advanced through the patient until this treatment balloon is disposed in the stenosed region of the blood vessel. The balloon is filled with the radioactive fluid which simultaneously expands and relieves the stenosis while irradiating the tissue, or if the stenosis has previously been relieved, the target tissue is irradiated by filling the treatment balloon with the radioactive fluid until the outer wall of the balloon engages, without substantially expanding, the inner wall of the blood vessel.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: April 1, 1997
    Assignee: Neocardia, LLC.
    Inventors: Richard T. Thornton, Anthony J. Bradshaw, Wayne W. Snyder
  • Patent number: 5139473
    Abstract: Remote controlled afterloader apparatus and method positions high activity radioactive sources through a catheter within a human body for treatment of cancerous tissue. The afterloader includes an operating console and a remotely located computer controlled wire driver. The wire driver includes active and dummy source wires and channels for the storage of such wires. Stepper motors precisely position the wires in response to computer control and data from wire position encoders. An emergency DC motor retraction system provides a high degree of safety against system malfunction. Timing arrangements are included for timing patient treatment duration and emergency wire retraction time. A turret is provided with safety locking and cross-checking systems to permit use of multiple catheters. Treatment profiles are conducted from the maximum treatment position whereby only tension or retraction forces are used to position the active wire.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: August 18, 1992
    Assignee: Omnitron International, Inc.
    Inventors: Anthony J. Bradshaw, Richard T. Thornton, Michael H. Hayman
  • Patent number: 5092834
    Abstract: Remote controlled afterloader apparatus and method positions high activity radioactive sources through a catheter within a human body for treatment of cancerous tissue. The afterloader includes an operating console and a remotely located computer controlled wire driver. The wire driver includes active and dummy source wires and channels for the storage of such wires. Stepper motors precisely position the wires in response to computer control and data from wire position encoders. An emergency DC motor retraction system provides a high degree of safety against system malfunction. Timing arrangements are included for timing patient treatment duration and emergency wire retraction time. A turret is provided with safety locking and cross-checking systems to permit use of multiple catheters. Treatment profiles are conducted from the maximum treatment position whereby only tension or retraction forces are used to position the active wire.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: March 3, 1992
    Assignee: Omnitron International, Inc.
    Inventors: Anthony J. Bradshaw, Richard T. Thornton, Michael H. Hayman