Patents by Inventor Karl B. Rundman

Karl B. Rundman 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).

  • As-cast, age-hardened Cu-Sn-Ni worm gearing and method of making same
    Patent number: 5230757
    Abstract: Worm gearing having improved wear and strength properties comprises a Cu, 8.0-13.0 w/o Sn, 3.5-5.0 w/o Ni alloy aged in the as-cast condition to strengthen the dendritic microstructural constituent (e.g., alpha phase) while retaining the as-cast, relatively hard interdendritic constituents. The overall Ni concentration of the alloy does not exceed about 5 w/o and the Ni concentration across individual as-cast dendrites is decreased at the dendrite edges (grain boundaries) to hinder formation of a discontinuous, embrittling grain boundary product that is deleterious to these properties.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: July 27, 1993
    Assignee: Cone Drive Operations, Inc.
    Inventors: Karl B. Rundman, Mark D. Gugel, David A. Nichols
  • As-cast, age-hardened Cu-Sn-Ni worm gearing and method of making same
    Patent number: 5100487
    Abstract: Worm gearing having improved wear and strength properties comprises a Cu, 8.0-13.0 w/o Sn, 3.5-5.0 w/o Ni alloy aged in the as-cast condition to strengthen the dendritic microstructural constituent (e.g., alpha phase) while retaining the as-cast, relatively hard interdendritic constituents. The overall Ni concentration of the alloy does not exceed about 5 w/o and the Ni concentration across individual as-cast dendrites is decreased at the dendrite edges (grain boundaries) to hinder formation of a discontinuous, embrittling grain boundary product that is deleterious to these properties.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: March 31, 1992
    Assignee: Cone Drive Operations Inc.
    Inventors: Karl B. Rundman, Mark D. Gugel, David A. Nichols