Patents by Inventor Robert H. McKenzie

Robert H. McKenzie 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).

  • Vertical shaft furnace for melting aluminum
    Patent number: 4844426
    Abstract: A vertical shaft furnace for and a method of efficiently melting aluminum and aluminum alloys substantially completely by convection is disclosed. The vertical shaft furnace has a generally cylindrical cross-section with a refractory liner and a cast refractory hearth having a concave, generally conical shape. A plurality of downwardly inclined burners are provided in the walls of the furnace arranged in such a way as to prevent the high velocity burner flame from blowing the aluminum material to be melted across the furnace and into burners on the opposite furnace wall.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: July 4, 1989
    Assignee: Southwire Company
    Inventors: David Barnes, Joseph A. Bass, John D. Butler, Robert H. McKenzie
  • Method of melting aluminum in a vertical shaft furnace
    Patent number: 4664702
    Abstract: A method of efficiently melting aluminum and aluminum alloys in a vertical shaft furnace substantially completely by convection is disclosed. The vertical shaft furnace has a generally cylindrical cross-section with a refractory liner and a cast refractory hearth having a concave, generally conical shape. A plurality of downwardly inclined burners are provided in the walls of the furnace arranged in such a way as to prevent the high velocity burner flame from blowing the aluminum material to be melted across the furnace and into burners on the opposite furnace wall.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: May 12, 1987
    Assignee: Southwire Company
    Inventors: David Barnes, Joseph A. Bass, John D. Butler, Robert H. McKenzie
  • Hotel telephone faceplate
    Patent number: D284662
    Type: Grant
    Filed: December 1, 1983
    Date of Patent: July 15, 1986
    Assignee: United Technologies Corporation
    Inventors: Robert H. McKenzie, Anthony J. Fastaia