Patents by Inventor Nicholas Couch

Nicholas Couch 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).

  • Screw plug immersion heater comprising separate header and threaded sleeve sections
    Patent number: 5191634
    Abstract: An immersion heater having a screw plug formed from header and sleeve parts. The header part comprises a stamped, thin sheet of metal having a plurality of holes for the heating elements to extend through and a portion of hexagonal configuration to be gripped by a tool. The sleeve part is a threaded piece of pipe to be screwed into the wall of a fluid-containing vessel. The header and sleeve parts are welded together to form the assembled screw plug.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: March 2, 1993
    Assignee: Wellman Thermal Systems Corporation
    Inventor: Nicholas Couch