Patents by Inventor Alan Peter Druschitz

Alan Peter Druschitz 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).

  • Machinable austempered cast iron article having improved machinability, fatigue performance, and resistance to environmental cracking
    Patent number: 7497915
    Abstract: A machinable austempered cast iron article has improved strength, machinability, fatigue performance, and resistance to environmental cracking. A method of making the machinable austempered cast iron article includes austenitizing an iron composition having a substantially pearlitic microstructure in an intercritical temperature range of between 1380° F. and 1500° F. This produces a ferritic plus austenitic microstructure. The ferritic plus austenitic microstructure is quenched into an austempering temperature range of between 575° F. and 750° F. within 3 minutes to prevent formation of pearlite. The ferritic plus austenitic microstructure is then austempered in the austempering temperature range of between 575° F. and 750° F. to produce a microstructure of a continuous matrix of equiaxed ferrite with islands of austenite. Finally, the microstructure of the continuous matrix of equiaxed ferrite with islands of austenite is cooled to ambient temperature to produce the machinable austempered cast iron article.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: March 3, 2009
    Assignee: Intermet Corporation
    Inventors: Alan Peter Druschitz, David Carroll Fitzgerald
  • Machinable austempered cast iron article having improved machinability, fatigue performance, and resistance to environmental cracking and a method of making the same
    Patent number: 7070666
    Abstract: A machinable austempered cast iron article has improved strength, machinability, fatigue performance, and resistance to environmental cracking. A method of making the machinable austempered cast iron article includes austenitizing an iron composition having a substantially pearlitic microstructure in an intercritical temperature range of between 1380° F. and 1500° F. This produces a ferritic plus austenitic microstructure. The ferritic plus austenitic microstructure is quenched into an austempering temperature range of between 575° F. and 750° F. within 3 minutes to prevent formation of pearlite. The ferritic plus austenitic microstructure is then austempered in the austempering temperature range of between 575° F. and 750° F. to produce a microstructure of a continuous matrix of equiaxed ferrite with islands of austenite. Finally, the microstructure of the continuous matrix of equiaxed ferrite with islands of austenite is cooled to ambient temperature to produce the machinable austempered cast iron article.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: July 4, 2006
    Assignee: INTERMET Corporation
    Inventors: Alan Peter Druschitz, David Carroll Fitzgerald
  • Machinable austempered cast iron article having improved machinability, fatigue performance, and resistance to environmental cracking and a method of making the same
    Publication number: 20040112479
    Abstract: A machinable austempered cast iron article has improved strength, machinability, fatigue performance, and resistance to environmental cracking. A method of making the machinable austempered cast iron article includes austenitizing an iron composition having a substantially pearlitic microstructure in an intercritical temperature range of between 1380° F. and 1500° F. This produces a ferritic plus austenitic microstructure. The ferritic plus austenitic microstructure is quenched into an austempering temperature range of between 575° F. and 750° F. within 3 minutes to prevent formation of pearlite. The ferritic plus austenitic microstructure is then austempered in the austempering temperature range of between 575° F. and 750° F. to produce a microstructure of a continuous matrix of equiaxed ferrite with islands of austenite.
    Type: Application
    Filed: September 4, 2003
    Publication date: June 17, 2004
    Inventors: Alan Peter Druschitz, David Carroll Fitzgerald