Patents by Inventor Robert D'Arrigo

Robert D'Arrigo 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).

  • Preheating cold blast air of a blast furnace for tempering the hot blast temperature
    Patent number: 7232542
    Abstract: An improved blast furnace system for producing molten iron incorporating a preheater to heat the cold blast air used to temper the hot blast temperature is disclosed. The improved blast furnace system comprises a blast furnace, a hot blast main for conveying a supply of hot blast to the blast furnace, a plurality of stoves for heating a supply of cold blast and generating the hot blast, a cold blast main for conveying a supply of cold blast to the plurality of stoves, and at least one cold blast preheater for heating a portion of the cold blast, that has been diverted to the preheater, into heated air and the heated air is mixed with the hot blast to temper the hot blast temperature.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: June 19, 2007
    Assignee: Aker Kvaerner Metals, Inc.
    Inventors: Michael Friedrich, Robert D'Arrigo
  • Preheating cold blast air of a blast furnace for tempering the hot blast temperature
    Publication number: 20040222574
    Abstract: An improved blast furnace system for producing molten iron incorporating a preheater to heat the cold blast air used to temper the hot blast temperature is disclosed. The improved blast furnace system comprises a blast furnace, a hot blast main for conveying a supply of hot blast to the blast furnace, a plurality of stoves for heating a supply of cold blast and generating the hot blast, a cold blast main for conveying a supply of cold blast to the plurality of stoves, and at least one cold blast preheater for heating a portion of the cold blast, that has been diverted to the preheater, into heated air and the heated air is mixed with the hot blast to temper the hot blast temperature.
    Type: Application
    Filed: April 5, 2004
    Publication date: November 11, 2004
    Inventors: Michael Friedrich, Robert D'Arrigo