Patents by Inventor Robert Clark Treseder
Robert Clark Treseder 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).
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Patent number: 9524845Abstract: An x-ray tube cathode with magnetic electron beam steering. In one example embodiment, an x-ray tube cathode includes a cathode head and an electron emitter. The cathode head includes electrically conductive and non-magnetic material integrated with magnetic material. The cathode head defines an emitter slot in a portion of electrically conductive and non-magnetic material positioned between two portions of magnetic material. The electron emitter is positioned within the emitter slot. The electron emitter is configured to emit a beam of electrons. The beam of electrons is configured to be both focused by the electrically conductive and non-magnetic material and steered during beam formation by the magnetic material.Type: GrantFiled: January 18, 2012Date of Patent: December 20, 2016Assignee: VARIAN MEDICAL SYSTEMS, INC.Inventors: James Russell Boye, Robert Clark Treseder
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Patent number: 9202664Abstract: Finned anode. In one example embodiment, an anode suitable for use in an x-ray tube includes a hub, a front side, and a target surface disposed on the front side. The hub is configured to attach to a bearing assembly and the front side substantially faces the bearing assembly. The anode further includes a rear side substantially opposite the front side, as well as two or more annular anode fins extending from the rear side. The annular anode fins are positioned radially outward from the hub to an outer periphery of the rear side.Type: GrantFiled: October 12, 2012Date of Patent: December 1, 2015Assignee: VARIAN MEDICAL SYSTEMS, INC.Inventors: Jeffrey Steven Wassom, Dennis H. Runnoe, Robert Clark Treseder
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Patent number: 8867706Abstract: An asymmetric x-ray tube. In one example embodiment, an x-ray tube includes an evacuated enclosure, a cathode assembly at least partially positioned within the evacuated enclosure and defining a first axis, and an anode assembly at least partially positioned within the evacuated enclosure and defining a second axis. The anode assembly includes a rotating anode having a focal spot. The focal spot and the second axis define a plane. The first axis is positioned beneath the plane.Type: GrantFiled: November 9, 2010Date of Patent: October 21, 2014Assignee: Varian Medical Systems, Inc.Inventors: Robert Clark Treseder, James E. Burke
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Publication number: 20140105366Abstract: Finned anode. In one example embodiment, an anode suitable for use in an x-ray tube includes a hub, a front side, and a target surface disposed on the front side. The hub is configured to attach to a bearing assembly and the front side substantially faces the bearing assembly. The anode further includes a rear side substantially opposite the front side, as well as two or more annular anode fins extending from the rear side. The annular anode fins are positioned radially outward from the hub to an outer periphery of the rear side.Type: ApplicationFiled: October 12, 2012Publication date: April 17, 2014Applicant: VARIAN MEDICAL SYSTEMS, INC.Inventors: Jeffrey Steven Wassom, Dennis H. Runnoe, Robert Clark Treseder
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Publication number: 20130182825Abstract: An x-ray tube cathode with magnetic electron beam steering. In one example embodiment, an x-ray tube cathode includes a cathode head and an electron emitter. The cathode head includes electrically conductive and non-magnetic material integrated with magnetic material. The cathode head defines an emitter slot in a portion of electrically conductive and non-magnetic material positioned between two portions of magnetic material. The electron emitter is positioned within the emitter slot. The electron emitter is configured to emit a beam of electrons. The beam of electrons is configured to be both focused by the electrically conductive and non-magnetic material and steered during beam formation by the magnetic material.Type: ApplicationFiled: January 18, 2012Publication date: July 18, 2013Applicant: VARIAN MEDICAL SYSTEMS, INC.Inventors: James Russell Boye, Robert Clark Treseder
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Publication number: 20120114104Abstract: An asymmetric x-ray tube. In one example embodiment, an x-ray tube includes an evacuated enclosure, a cathode assembly at least partially positioned within the evacuated enclosure and defining a first axis, and an anode assembly at least partially positioned within the evacuated enclosure and defining a second axis. The anode assembly includes a rotating anode having a focal spot. The focal spot and the second axis define a plane. The first axis is positioned beneath the plane.Type: ApplicationFiled: November 9, 2010Publication date: May 10, 2012Applicant: VARIAN MEDICAL SYSTEMS, INC.Inventors: Robert Clark Treseder, James E. Burke
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Patent number: 7539286Abstract: A filament assembly for use in an x-ray emitting device or other filament-containing device is disclosed. In one embodiment, an x-ray tube is disclosed, including a vacuum enclosure that houses both an anode having a target surface, and a cathode positioned with respect to the anode. The cathode includes a filament assembly for emitting a beam of electrons during tube operation. The filament assembly comprises a heat sink and a plurality of filament segments. The filament segments are configured for simultaneous emission of an electron beam for impingement on the target surface of the anode, and are electrically connected in series. Each filament segment includes first and second end portions that are thermally connected to the heat sink, and a central portion that can be configured with a modified work function for preferential electron emission.Type: GrantFiled: November 19, 2007Date of Patent: May 26, 2009Assignee: Varian Medical Systems, Inc.Inventors: Steve Bandy, Gary F Virshup, Michael Curzon Green, James Russell Boye, Dennis Runnoe, Robert Clark Treseder, David Humber
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Publication number: 20090129550Abstract: A filament assembly for use in an x-ray emitting device or other filament-containing device is disclosed. In one embodiment, an x-ray tube is disclosed, including a vacuum enclosure that houses both an anode having a target surface, and a cathode positioned with respect to the anode. The cathode includes a filament assembly for emitting a beam of electrons during tube operation. The filament assembly comprises a heat sink and a plurality of filament segments. The filament segments are configured for simultaneous emission of an electron beam for impingement on the target surface of the anode, and are electrically connected in series. Each filament segment includes first and second end portions that are thermally connected to the heat sink, and a central portion that can be configured with a modified work function for preferential electron emission.Type: ApplicationFiled: November 19, 2007Publication date: May 21, 2009Applicant: Varian Medical Systems Technologies, Inc.Inventors: Steve G. Bandy, Gary F. Virshup, Michael Curzon Green, James Russell Boye, Dennis Runnoe, Robert Clark Treseder, David Humber
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Publication number: 20090086898Abstract: An x-ray device and method useful in performing close coupled sample analyses. The x-ray device includes an evacuated enclosure having a window and in which is disposed a cathode assembly, control grid, insulator, and anode arranged so that the anode is interposed between the electron source and the window. The anode includes a target surface oriented toward the window and the anode defines a drift tunnel which is substantially aligned with a hollow defined by the insulator. The control grid can be used to influence the energy of the electrons emitted by the filament of the cathode assembly. A high voltage field between the anode and filament causes electrons emitted by the cathode to accelerate rapidly through the insulator. After accelerating to an energy level consistent with the high voltage field, the electrons then pass through the drift tunnel without gaining any additional appreciable energy.Type: ApplicationFiled: September 27, 2007Publication date: April 2, 2009Applicant: Varian Medical Systems Technologies, Inc.Inventors: John E. Richardson, Robert Clark Treseder