Patents by Inventor Anthony J. Bradshaw

Anthony J. Bradshaw 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: 9745134
    Abstract: A conveyor belt comprised of a plurality of two types of elongated bars, arranged in parallel, spaced relation. The first type of bar includes a plurality of transverse elements, extending perpendicularly from either side of the bar. The second type of bar is preferably cylindrical. The two types of bars are arranged in alternating fashion along the belt, with the ends of the elements from the first type of bar in predetermined spaced relation from the side of an adjacent second type of bar. The relative heights of the two types of bars may be varied, to define article conveying pockets of different sizes and depths. Rollers are provided within of the arcuate ends of belts driving and supporting the bars. The belt may be endless, or assembled from one or more belt segments. Two or more belts may be combined laterally, to increase the width of the conveyor belt.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: August 29, 2017
    Assignee: AGRICULTURAL DISTRIBUTING, INC.
    Inventor: Anthony J. Bradshaw
  • Patent number: 9656809
    Abstract: A conveyor belt comprised of a plurality of rigid, elongated bars arranged in parallel, spaced relation. The ends of each bar are connected to parallel, lateral belts, to support the bars and maintain their registration. Each bar has a plurality of elements, extending from either side of the bar. Elements on one side of a bar arranged in interdigitized relation with respect to adjacent elements extending from an adjacent bar. Rollers are provided within of the arcuate ends of the lateral belts, with at least one roller being driven. The rollers may be smooth or toothed, to engage the undersides of the lateral belts. The belt may be endless, or assembled from one or more belt segments. Two or more belts may be combined laterally, to increase the width of the conveyor belt.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: May 23, 2017
    Assignee: Agricultural Distributing, Inc.
    Inventors: Anthony J. Bradshaw, Daniel G. Mills
  • 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
  • Publication number: 20030109909
    Abstract: A method of treating a tapered vessel with radiation. Separate sections of the vessel are treated for independently determined dwell times. A proximal diameter, a distal diameter, and an intermediate diameter can be established upon which prescription points can be based.
    Type: Application
    Filed: December 29, 2000
    Publication date: June 12, 2003
    Inventors: Michelle N. Ledesma, Anthony J. Bradshaw, Eric D. Peterson, Edward W. Milner
  • Patent number: 6506145
    Abstract: A source wire having a radioactive source at its distal tip is used to treat a blood vessel within a patient's body by localized in vivo radiation to prevent stenosis of the blood vessel, including restenosis following percutaneous transluminal coronary angioplasty. The source wire is advanced to the target site along the intravascular system of the patient's body from a point external to the body. The source wire is preferably a solid lead of substantially uniform thickness along its entire length, composed of a superelastic nickel-titanium alloy (nitinol). Alternatively, the wire may be a cable composed of multiple strands of the alloy of substantially uniform thickness throughout the entire length of each strand. The alloy has desired characteristics of superelasticity for transitioning into and out of a stress-induced martensitic state as it is advanced through tortuous lumens for passage into the coronary arteries.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: January 14, 2003
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Anthony J. Bradshaw, Steven L. Weinberg, Albert E. Raizner
  • Patent number: 6450988
    Abstract: A centering catheter with engagement knobs to provide improved perfusion in a vessel during intravascular radiation therapy. In one embodiment, a helical centering balloon catheter includes a helical centering balloon formed of helical lobes having a plurality of engagement knobs that outwardly protrude from the helical lobes. The helical lobes form a main spiral perfusion channel for perfusion of blood past the centering catheter. The engagement knobs compliantly engage the vessel walls and offset of the helical lobes such that auxiliary perfusion channels are formed around the engagement knobs between the helical lobes and the walls of the vessel to allow additional perfusion. In the event of a partial obstruction of the spiral channel or a single point failure, the auxiliary perfusion channels allow perfusion past the obstruction.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: September 17, 2002
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventor: Anthony J. Bradshaw
  • 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
  • Publication number: 20020065448
    Abstract: A method is disclosed to treat the wall of a blood vessel from within the lumen thereof with a radiation catheter that includes a working or radiotherapy lumen, a longitudinally channeled distal balloon, and a balloon inflation lumen. The method includes steps of inserting the catheter into the vessel lumen until the balloon is adjacent a target site of the vessel wall to be treated, inflating the balloon to substantially center the catheter radiotherapy lumen within the vessel lumen at the target site while allowing perfusion of blood past the inflated balloon through channels formed by the balloon, advancing a radioactive source into the catheter radiotherapy lumen to position the source within a region of that lumen along a portion of the catheter occupied by the balloon; and withdrawing the source after it has been positioned within that region of the radiotherapy lumen for a predetermined interval of time.
    Type: Application
    Filed: September 4, 2001
    Publication date: May 30, 2002
    Inventors: Anthony J. Bradshaw, Steven L. Weinberg, Albert E. Raizner, John P. Edison
  • Patent number: 6283910
    Abstract: A source wire having a radioactive source at its distal tip is used to treat tissue at a target site within a patient's body by localized in vivo radiation. The source wire is advanced to the target site along the intravascular system of the patient's body from a point external to the body. The source wire is a solid lead of substantially uniform thickness along its entire length, composed of nickel-titanium alloy (nitinol). Alternatively, the wire may be a cable composed of multiple strands of the alloy of substantially uniform thickness throughout the entire length of each strand. The alloy has desired characteristics including flexibility, springiness, slipperiness, mechanical strength and shape memory retention, and the source wire is imparted with certain stressed and unstressed states that depend on flexation of the wire and a prescribed transition temperature.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: September 4, 2001
    Inventors: Anthony J. Bradshaw, Steven L. Weinberg, Albert E. Raizner
  • 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: 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: 5882291
    Abstract: A method is disclosed for treating a blood vessel which has been subjected to interventional dilatation, to inhibit restenosis that would otherwise occur from cellular proliferation attributable to traumatic response at the site of the vessel interior wall where the dilatation was performed. The method includes introducing a radioactive source into the blood vessel so that the source is positioned adjacent to the site, and exposing targeted tissue of the vessel interior wall at the site to said radioactive source for a period of time sufficient to deliver a prescribed dose of radiation to the tissue. The rate at which the prescribed dose is delivered to the targeted tissue is adjusted to positively assure that the rate is held in a range with an upper limit of about 60 rads per second.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: March 16, 1999
    Assignee: Neocardia, LLC
    Inventors: Anthony J. Bradshaw, Richard V. Calfee
  • 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: 5782741
    Abstract: A treatment wire is provided for the delivery of a treatment to a site within the body that is composed of two stages. This treatment wire includes a single wire drive portion that is optimal for the proximal end of the treatment wire and engages any storage and/or drive mechanism that may be used in storing and/or deploying the treatment wire. The single drive wire is ground at its distal end to a smaller diameter and encased within a tube forming the second stage of the treatment wire. Because the drive wire terminates proximally to the tube, a cavity is formed that can retain the treating substance to be delivered to the patient. Shape-memory/superelastic material is preferably used for the construction of the treatment wire. When such material is used, the distal end of the treatment wire can be heat treated in order to render it more ductile and, therefore, more desirable for use in the tortuous passageways of the body.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: July 21, 1998
    Assignee: Guidant Coropration
    Inventors: Anthony J. Bradshaw, Kenneth M. Bueche
  • 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: 5643171
    Abstract: A method and apparatus for intravascular radiotherapy for prevention of stenosis following angioplasty or other trauma to coronary arteries caused by smooth muscle cell hyperplasia in which a uniform dosage of radiation is delivered to the walls of the artery by positively positioning a radioactive source at the radial center of the artery being treated.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: July 1, 1997
    Assignee: NeoCardia, LLC
    Inventors: Anthony J. Bradshaw, Albert E. Raizner
  • 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