Patents by Inventor Craig S. Ward

Craig S. Ward 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).

  • Counterbalance system adjustment mechanism for rollup door
    Patent number: 6155327
    Abstract: A counterbalance spring adjustment mechanism, particularly adapted for a rollup type upward-acting door which is supported between spaced apart wall brackets on a rotatable shaft. One end of the torsion spring is connected to a hub including a tubular hub member and a circumferential radially extending flange. The tubular hub member is disposed in a bore formed in one of the wall brackets and is retained in assembly therewith by a cylindrical collar. The door support shaft is disposed in a self-lubricating polymer bushing which is supported in the tubular hub member.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: December 5, 2000
    Assignee: Overhead Door Corporation
    Inventors: David M. Wells, Craig S. Ward, Jr.
  • Sealed observation element for sulfur recovery unit
    Patent number: 5821428
    Abstract: A sealed observation element for viewing the flow of molten liquid during the operation of a sulfur recovery unit comprises at least one sight glass that is heated and which may be swept with a purge gas supplied through one or more bleed rings to prevent condensation or deposition of materials on the side of the sight glass exposed to the process stream.
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: October 13, 1998
    Assignee: Koch Enterprises, Inc.
    Inventors: George W. Taggart, James E. Lewis, Craig S. Ward