Patents by Inventor Greg Frederick

Greg Frederick 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).

  • Method for inspection and repair
    Patent number: 7617603
    Abstract: A method for the inspection and repair of a tube includes electrical discharge machining an access hole into the tube, optionally at or near the uppermost location on the tube, near the upper header; performing inspection of the tube, optionally using a visual or an eddy current inspection technique; providing an inner diameter flush-mounted plug insert which has been machined for re-inserting into the access hole; and attaching the plug insert to the tube.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: November 17, 2009
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Kent Coleman, David Wayne Gandy, Greg Frederick, Rich Tilley
  • METHOD FOR REPAIRING HEAT RECOVERY STEAM GENERATOR TUBE-TO-HEADER DAMAGE
    Publication number: 20090223053
    Abstract: A method for repairing a heat recovery steam generator (HSRG) header to tube attachment damage, includes providing an access window in the header opposite the damaged header to tube attachment location; removing the header to tube attachment damage; inserting a tapered stub tube into a header penetration centered axially immediately over the tube; effecting a profile weld between the header and the tapered stub tube at the header penetration from the inside surface of the header; welding the tapered stub tube to the existing tube through the header inside diameter; welding shut the access window; and completing a post weld heat treatment of all the welds.
    Type: Application
    Filed: May 8, 2009
    Publication date: September 10, 2009
    Applicant: Electric Power Research Institute, Inc.
    Inventors: David Wayne GANDY, Greg FREDERICK, Kent COLEMAN
  • Method for repairing heat recovery steam generator tube-to-header damage
    Patent number: 7547859
    Abstract: A method for repairing a heat recovery steam generator (HSRG) header to tube attachment damage, includes providing an access window in the header opposite the damaged header to tube attachment location; removing the header to tube attachment damage; inserting a tapered stub tube into a header penetration centered axially immediately over the tube; effecting a profile weld between the header and the tapered stub tube at the header penetration from the inside surface of the header; welding the tapered stub tube to the existing tube through the header inside diameter; welding shut the access window; and completing a post weld heat treatment of all the welds.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: June 16, 2009
    Assignee: Electric Power Research Institute, Inc.
    Inventors: David Wayne Gandy, Greg Frederick, Kent Coleman
  • Method for repairing heat recovery steam generator tube-to-header damage
    Publication number: 20060207096
    Abstract: A method for repairing a heat recovery steam generator (HSRG) header to tube attachment damage, includes providing an access window in the header opposite the damaged header to tube attachment location; removing the header to tube attachment damage; inserting a tapered stub tube into a header penetration centered axially immediately over the tube; effecting a profile weld between the header and the tapered stub tube at the header penetration from the inside surface of the header; welding the tapered stub tube to the existing tube through the header inside diameter; welding shut the access window; and completing a post weld heat treatment of all the welds.
    Type: Application
    Filed: February 28, 2006
    Publication date: September 21, 2006
    Applicant: Electric Power Research Institute, Inc.
    Inventors: David Gandy, Greg Frederick, Kent Coleman
  • Method for inspection and repair
    Publication number: 20060191119
    Abstract: A method for the inspection and repair of a tube includes electrical discharge machining an access hole into the tube, optionally at or near the uppermost location on the tube, near the upper header; performing inspection of the tube, optionally using a visual or an eddy current inspection technique; providing an inner diameter flush-mounted plug insert which has been machined for re-inserting into the access hole; and attaching the plug insert to the tube.
    Type: Application
    Filed: February 28, 2006
    Publication date: August 31, 2006
    Applicant: Electric Power Research Institute, Inc.
    Inventors: Kent Coleman, Daivd Gandy, Greg Frederick, Rich Tilley