Patents by Inventor Friedrich A. K. Luth

Friedrich A. K. Luth 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).

  • Apparatus for controlling the injection of oil into a blast furnace
    Patent number: 4127259
    Abstract: An instrument for measuring the blast air volume within a blast tuyere is connected to a ratio controller which controls the opening and closing of oil and water valves in proportion to one another. A servomotor connects the ratio controller to the oil and water valves attached to a common shaft. The servomotor and the ratio controller are fed back to each other by a set value/actual value comparison. A differential pressure obtained by the blast air measuring instrument can be converted by transducers into a differential voltage and a differential current which controls the ratio controller.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: November 28, 1978
    Inventor: Friedrich A. K. Luth