Patents by Inventor David Thomason

David Thomason 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: 20080060780
    Abstract: A method for operating an automated reciprocator for applying lubricant in a die casting system. As a reciprocator is moved between two die halves and a fluid is applied to the dies with the reciprocator, a safety bar is moved ahead of the reciprocator. Any objects in the path of the reciprocator are detected by contact with the safety bar. If the safety bar contacts an object as the reciprocator is moving down, a sensor signals a control system and the reciprocator is stopped.
    Type: Application
    Filed: November 15, 2007
    Publication date: March 13, 2008
    Applicant: L&P Property Management Company
    Inventors: David Thomason, David Bumpus, Danny Alford, Olen Marshall
  • Patent number: 7171787
    Abstract: A rectangular tilt-up concrete tank includes a concrete slab with a metal plate anchored thereto, the metal plate defining at least one substantially linear concrete side wall location. A plurality of preformed concrete side panels each having metal plates attached along a bottom edge and opposing side edges are welded in a liquid-tight weld to the metal plate defining the concrete side wall location and a side metal plate of each side panel is welded to a metal side plate of an adjacent side panel in a liquid-tight weld to define a concrete side wall. Horizontal and vertical post-tensioning sleeves are provided in the side panels for receiving post-tensioning tendons.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: February 6, 2007
    Assignee: CH2M Hill Inc.
    Inventors: David Thomason, Mary Williams Goodson, Christian Carl Sundberg, Michael Louis Doleac
  • Publication number: 20060005938
    Abstract: An automated reciprocator for applying lubricant to the cavity of a die casting system having a safety bar for preventing the reciprocator from injuring a person or damaging equipment which may be present in the reciprocator travel path. The safety bar is movably carried on the lower side of the reciprocator and includes a sensor to detect relative movement between the safety bar and the reciprocator. The proximity sensor is coupled to a control system. If the safety bar contacts an object as the reciprocator is moving down, the sensor signals the control system and the reciprocator is stopped.
    Type: Application
    Filed: July 8, 2004
    Publication date: January 12, 2006
    Inventors: David Thomason, David Bumpus, Danny Alford, Olen Marshall
  • Publication number: 20040261326
    Abstract: A rectangular tilt-up concrete tank includes a concrete slab with a metal plate anchored thereto, the metal plate defining at least one substantially linear concrete side wall location. A plurality of preformed concrete side panels each having metal plates attached along a bottom edge and opposing side edges are welded in a liquid-tight weld to the metal plate defining the concrete side wall location and a side metal plate of each side panel is welded to a metal side plate of an adjacent side panel in a liquid-tight weld to define a concrete side wall. Horizontal and vertical post-tensioning sleeves are provided in the side panels for receiving post-tensioning tendons.
    Type: Application
    Filed: June 24, 2003
    Publication date: December 30, 2004
    Applicant: CH2M HILL, Inc.
    Inventors: David Thomason, Mary Williams Goodson, Christian Carl Sundberg, Michael Louis Doleac
  • Patent number: 5423502
    Abstract: The invention is a readily adjustable work station. The invention includes a manual or machine driven linkage for adjusting the vertical position of a work station top surface in a level manner. This linkage includes rack and gear sets associated with movable supporting columns that support the work station top surface and a rotational transfer means that ensures that rotational energy from a driving means is evenly imparted to the rack and gear sets. Alternatively, the mechanical linkage may comprise ball plunger screws rather than rack and gear sets.The invention also includes an apparatus for manually adjusting the angular orientation of the work station top surface, and an apparatus for adjusting the clearance between the stationary support structure and the movable support structure.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: June 13, 1995
    Assignee: Juki America, Inc.
    Inventors: David Thomason, Hideho Sasamoto