Patents by Inventor David Craig Smith

David Craig Smith 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: 20190161690
    Abstract: A system for producing an American Petroleum Institute Standards Group III Base Stock from vacuum gas oil, by injecting hydrogen, heating, saturating the mixture through hydrogen reactors connected in series with a liquid hourly space velocity (LHSV)?1 of from 0.5 to 2.5, forming a saturated heated base oil, and coproduct. The system fractionates the saturated heated base oil to while simultaneously refluxing a cooled fuel oil fraction forming an American Petroleum Institute Standards Group III Base Stock with less than 0.03% sulfur, with greater than 90% saturates and a viscosity index greater than 120 as defined by ASTM D-2270, a viscosity from 2 to 10 centistokes as defined by ASTM D-445 a boiling range from 600 degrees F. to 1050 degrees F., and a cold crank viscosity (CCS) between 1200 and 5000 centipoise at ?25 degrees C. and as defined by ASTM D-5293.
    Type: Application
    Filed: November 27, 2018
    Publication date: May 30, 2019
    Inventors: Benjamin Cowart, David Peel, Frank Lappin, James Craig Smith
  • Publication number: 20190161693
    Abstract: A method for producing an American Petroleum Institute Standards Group III Base Stock from vacuum gas oil, by injecting hydrogen, heating, saturating the mixture through hydrogen reactors connected in series with a liquid hourly space velocity (LHSV)?1 from 0.5 to 2.5, forming a saturated heated base oil, and coproduct. The method fractionates the saturated heated base oil while simultaneously refluxing a cooled light oil fraction forming an American Petroleum Institute Standards Group III Base Stock with less than 0.03% sulfur, with greater than 90% saturates and a viscosity index greater than 120 as defined by ASTM D-2270, a viscosity from 2 to 10 centistokes as defined by ASTM D-445 a boiling point range from 600 degrees F. to 1050 degrees F. as defined by ASTM D-86, and a cold crank viscosity (CCS) between 1200 and 5000 centipoise at minus 25 degrees C. and as defined by ASTM D-5293.
    Type: Application
    Filed: November 27, 2018
    Publication date: May 30, 2019
    Inventors: BENJAMIN COWART, David Peel, Frank Lappin, James Craig Smith
  • Patent number: 10287515
    Abstract: A method for producing an American Petroleum Institute Standards Group III Base Stock from vacuum gas oil, by injecting hydrogen, heating, saturating the mixture through hydrogen reactors connected in series with a liquid hourly space velocity (LHSV)?1 from 0.5 to 2.5, forming a saturated heated base oil, and coproduct. The method fractionates the saturated heated base oil while simultaneously refluxing a cooled light oil fraction forming an American Petroleum Institute Standards Group III Base Stock with less than 0.03% sulfur, with greater than 90% saturates and a viscosity index greater than 120 as defined by ASTM D-2270, a viscosity from 2 to 10 centistokes as defined by ASTM D-445 a boiling point range from 600 degrees F. to 1050 degrees F. as defined by ASTM D-86, and a cold crank viscosity (CCS) between 1200 and 5000 centipoise at minus 25 degrees C. and as defined by ASTM D-5293.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: May 14, 2019
    Inventors: Benjamin Cowart, David Peel, Frank Lappin, James Craig Smith
  • Patent number: 9831058
    Abstract: The disclosed subject matter includes devices and methods relating to vacuums and vacuum assemblies. In some aspects, methods and devices relate to a vacuum assembly including a body defining an evacuated vacuum chamber, a conduit in the body extending between the vacuum chamber and an exterior of the body, a plug at least partially occluding the conduit, and a seal between the plug and the body that seals the vacuum chamber from the exterior of the body.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: November 28, 2017
    Assignee: VAREX IMAGING CORPORATION
    Inventors: David Craig Smith, Christopher Price, Derek Bullock, James E. Burke
  • Patent number: 9648710
    Abstract: An x-ray housing can include: a finned housing member having a tubular body with an external fin array on a finned external surface and an internal fin array on a finned internal surface, the finned internal surface defining a finned housing lumen, the internal fin array and external fin array cooperatively forming a heat exchanger; and an apertured housing member having a tubular body with an x-ray window aperture extending therethrough from an external surface to an internal surface, the internal surface defining an apertured housing lumen, the finned housing member having an annular end integrally coupled with an annular end of the apertured housing member to form a tubular x-ray housing having an x-ray housing lumen.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: May 9, 2017
    Assignee: VAREX IMAGING CORPORATION
    Inventors: David Craig Smith, Gregory Andrews, Owen D. Brimhall, Anson Cole Chamberlain
  • Publication number: 20160211105
    Abstract: The disclosed subject matter includes devices and methods relating to vacuums and vacuum assemblies. In some aspects, methods and devices relate to a vacuum assembly including a body defining an evacuated vacuum chamber, a conduit in the body extending between the vacuum chamber and an exterior of the body, a plug at least partially occluding the conduit, and a seal between the plug and the body that seals the vacuum chamber from the exterior of the body.
    Type: Application
    Filed: January 21, 2015
    Publication date: July 21, 2016
    Inventors: David Craig Smith, Christopher Price, Derek Bullock, James E. Burke
  • Publication number: 20150139404
    Abstract: An x-ray housing can include: a finned housing member having a tubular body with an external fin array on a finned external surface and an internal fin array on a finned internal surface, the finned internal surface defining a finned housing lumen, the internal fin array and external fin array cooperatively forming a heat exchanger; and an apertured housing member having a tubular body with an x-ray window aperture extending therethrough from an external surface to an internal surface, the internal surface defining an apertured housing lumen, the finned housing member having an annular end integrally coupled with an annular end of the apertured housing member to form a tubular x-ray housing having an x-ray housing lumen.
    Type: Application
    Filed: July 30, 2014
    Publication date: May 21, 2015
    Inventors: David Craig Smith, Gregory Andrews, Owen D. Brimhall, Anson Cole Chamberlain
  • Publication number: 20140311697
    Abstract: Integral liquid-coolant passageways in an x-ray tube. In one example embodiment, an x-ray tube includes a can at least partially defining an evacuated enclosure, a cathode at least partially positioned within the evacuated enclosure, and an anode at least partially positioned within the evacuated enclosure. The can has first integral liquid-coolant passageways formed therein. The can is configured to have a liquid coolant circulated through the first integral liquid-coolant passageways to thereby cool the can without the can being submersed in a liquid coolant.
    Type: Application
    Filed: March 17, 2014
    Publication date: October 23, 2014
    Applicant: VARIAN MEDICAL SYSTEMS, INC.
    Inventors: Travis Lee Astle, David Craig Smith, Lawrence Wheatley Bawden, Jeffrey Steven Wassom
  • Patent number: 8675819
    Abstract: Integral liquid-coolant passageways in an x-ray tube. In one example embodiment, an x-ray tube includes a can at least partially defining an evacuated enclosure, a cathode at least partially positioned within the evacuated enclosure, and an anode at least partially positioned within the evacuated enclosure. The can has first integral liquid-coolant passageways formed therein. The can is configured to have a liquid coolant circulated through the first integral liquid-coolant passageways to thereby cool the can without the can being submersed in a liquid coolant.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: March 18, 2014
    Assignee: Varian Medical Systems, Inc.
    Inventors: Travis Lee Astle, David Craig Smith, Lawrence Wheatley Bawden, Jeffrey Steven Wassom
  • Publication number: 20120076278
    Abstract: Integral liquid-coolant passageways in an x-ray tube. In one example embodiment, an x-ray tube includes a can at least partially defining an evacuated enclosure, a cathode at least partially positioned within the evacuated enclosure, and an anode at least partially positioned within the evacuated enclosure. The can has first integral liquid-coolant passageways formed therein. The can is configured to have a liquid coolant circulated through the first integral liquid-coolant passageways to thereby cool the can without the can being submersed in a liquid coolant.
    Type: Application
    Filed: September 27, 2010
    Publication date: March 29, 2012
    Applicant: VARIAN MEDICAL SYSTEMS, INC
    Inventors: Travis Lee Astle, David Craig Smith, Lawrence Wheatley Bawden, Jeffrey Steven Wassom
  • Patent number: 7203281
    Abstract: An encapsulated stator assembly for use in stator-driven devices is disclosed. The encapsulated stator assembly includes a stator and a covering portion that envelops the stator. The purpose of the covering portion is multi-fold: first, the covering portion serves as a means for mounting and securing the stator, such as within the outer housing of an x-ray tube. Second, the covering portion is thermally conductive to enable heat produced by the stator during operation to be dissipated to the outer housing of the x-ray tube thereof. Additionally, the covering portion can include an x-ray absorbent material to reduce x-ray emission from the x-ray tube. Though x-ray tubes represent one advantageous application, the encapsulated stator assembly of the present invention can be used in a variety of motor and stator-driven devices. The encapsulated stator assembly is especially well suited for use in dirty or dusty environments.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: April 10, 2007
    Assignee: Varian Medical Systems, Inc.
    Inventors: David Craig Smith, Mike Vanvoorhis, Christopher Artig, David Pistorius
  • Patent number: 7142639
    Abstract: A dielectric connector for use in high voltage devices, including x-ray tubes, is disclosed. The connector comprises a dielectric material and is pre-formed before attachment to the x-ray tube. Pre-formation of the connector creates a first cavity portion therein that conforms in shape to a corresponding segment of the tube surface. A second cavity portion is also defined for receiving a high voltage receptacle. Upon attachment to the tube, the first cavity portion receives the corresponding tube segment. The high voltage receptacle is received into the second cavity portion and electrically connects with a receptacle defined on the tube surface. The receptacle enables a high voltage signal passing through the electrode to connect with either the anode or cathode disposed within the tube. Pre-formation of the connector enables connector testing and repair to occur before it is attached to the tube, saving resources, time, and cost.
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: November 28, 2006
    Assignee: Varian Medical Systems Technologies, Inc.
    Inventors: David Craig Smith, Mike Vanvoorhis, Christopher Artig