Patents by Inventor Stephen J. Francis

Stephen J. Francis 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).

  • Electric trace tube bundle with internal branch circuit
    Patent number: 8164031
    Abstract: An electric trace tube bundle characterized by an internal branched circuit or circuits wherein power to the branched circuit or circuits is supplied via leads contained within a tubular jacket surrounding an insulation layer and an inner core containing one or more process tubes and the heater circuits. Such an arrangement allows the power connection to the heater circuits to be made at a proximal end of the bundle, thereby eliminating the need to cut through the jacket to make branched circuit power connections at a location remote from the proximal end of the bundle.
    Type: Grant
    Filed: November 1, 2007
    Date of Patent: April 24, 2012
    Assignee: Parker-Hannifin Corporation
    Inventors: Stephen J. Francis, Lawrence K. Kunkel, Dale J. Zelesnik
  • ELECTRIC TRACE TUBE BUNDLE WITH INTERNAL BRANCH CIRCUIT
    Publication number: 20080210682
    Abstract: An electric trace tube bundle characterized by an internal branched circuit or circuits wherein power to the branched circuit or circuits is supplied via leads contained within a tubular jacket surrounding an insulation layer and an inner core containing one or more process tubes and the heater circuits. Such an arrangement allows the power connection to the heater circuits to be made at a proximal end of the bundle, thereby eliminating the need to cut through the jacket to make branched circuit power connections at a location remote from the proximal end of the bundle.
    Type: Application
    Filed: November 1, 2007
    Publication date: September 4, 2008
    Inventors: Stephen J. Francis, Lawrence K. Kunkel, Dale J. Zelesnik