Patents Assigned to Waupaca Foundry, Inc.
  • Compacted graphite iron brake drum
    Patent number: 6572712
    Abstract: A compacted graphite iron brake component for use in a braking system having a final composition of: 3.0 to about 4.0 percent carbon; 2.15 to about 2.60 percent silicon; 0.40 to about 0.90 manganese; and the balance iron. The brake component having a frictionally engageable portion with a microstructure of compacted graphite disposed in a pearlitic matrix.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: June 3, 2003
    Assignees: Waupaca Foundry, Inc., Webb Wheel Products, Inc.
    Inventors: William L. Powell, Paul D. Levering
  • Wear resistant ductile iron
    Patent number: 6258180
    Abstract: Austempered ductile iron castings having primary iron carbides uniformly dispersed throughout an ausferritic matrix, and methods of making the same, are described. The dissolution of the primary iron carbides into the ausferritic matrix during the austempering process is prevented or lessened by altering the chemical composition of the ductile iron, employing a stabilizing agent, by altering the processing parameters of the austempering process, or any combination thereof.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: July 10, 2001
    Assignee: Waupaca Foundry, Inc.
    Inventors: Al Wilde, Dan Korpi, Brian Schultz