Patents by Inventor John P. Richardson

John P. Richardson 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).

  • AC melt to bushing current detector
    Patent number: 7633734
    Abstract: An AC melt to bushing current detector (FIG. 4) for a channel induction furnace (FIG. 1) which can detect when molten metal from the loop (122) in a saturated inductor (FIG. 5) has come in contact with the metal bushing (236) whereupon the power to the induction coil (234) is turned off, preventing a catastrophic molten metal run out through the bushing (236).
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: December 15, 2009
    Assignee: Duca Manufacturing & Consulting, Inc.
    Inventors: John P. Richardson, Timothy T. Owens
  • AC melt to bushing current detector
    Publication number: 20080106830
    Abstract: An AC melt to bushing current detector (FIG. 4) for a channel induction furnace (FIG. 1) which can detect when molten metal from the loop (122) in a saturated inductor (FIG. 5) has come in contact with the metal bushing (236) whereupon the power to the induction coil (234) is turned off, preventing a catastrophic molten metal run out through the bushing (236).
    Type: Application
    Filed: November 2, 2006
    Publication date: May 8, 2008
    Inventors: John P. Richardson, Timothy T. Owens
  • Combustion equipment for gas turbine engines
    Patent number: 4187674
    Abstract: A potted head combustion chamber is provided with an annular gap between the downstream end of the pot and the combustion chamber itself. Air is supplied radially inwardly through this gap to remove any fuel which adheres to the walls of the pot, and prevents it from reaching the walls of the combustion chamber. Fuel on the combustion chamber walls can cause localized burning of the fuel with a consequent increase in temperature of that part of the combustion chamber wall.
    Type: Grant
    Filed: January 18, 1978
    Date of Patent: February 12, 1980
    Assignee: Rolls-Royce Limited
    Inventor: John P. Richardson