Patents by Inventor Mark D. Koepsel

Mark D. Koepsel 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).

  • Method of preparing high nodule malleable iron and its named product
    Patent number: 6024804
    Abstract: The invention is a malleable iron comprising about 250 to 400 nodules of graphite per square millimeter as observed in a photomicrograph at 100.times., and a Brinell hardness of about 195 to 550 BHN. Preferably, the malleable iron further comprises sulfur and manganese wherein the manganese is present in an excess amount of at least 2 times the amount of sulfur plus 0.15% and is formed by two separate quenching steps. The invention further comprises a method of preparing a malleable iron having a high nodule count comprising the steps of prenucleating a malleable iron casting at a temperature of about 600 to 900.degree. F. for about 3 to 6 hours; austenitizing the prenucleated casting at about 1680 to 1740.degree. F. for about 3 to 9 hours to form graphite nodules such that the malleable iron has about 250 to 400 nodules per mm.sup.2 ; and quenching the casting to form pearlite and a malleable iron made by this process.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: February 15, 2000
    Assignee: Ohio Cast Products, Inc.
    Inventors: Charles Robert Ferra, Mark D. Koepsel