Patents by Inventor Robert N. Knight, Jr.

Robert N. Knight, Jr. 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).

  • Blast furnace air heater
    Patent number: 5044940
    Abstract: An air heating apparatus for air that is to be supplied to a blast furnace. The apparatus includes a number of separate air heater devices connected together in series flow relation so that the total temperature increase is the sum of the heating actions produced in the individual devices. Each device includes a tube-shell heat exchanger and a plurality of burner units oriented around the shell to direct flames against outer surfaces of the tubes.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: September 3, 1991
    Assignee: James R. Martin
    Inventor: Robert N. Knight, Jr.