Patents by Inventor Phil J. Shankwitz

Phil J. Shankwitz 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).

  • Track bushing having improved abrasion and galling resistance
    Patent number: 6145941
    Abstract: A track bushing for an endless track of a track-type vehicle includes a first end, a second end and a middle portion, an outer surface and an inner surface, a first sealing surface adjacent the first end and a second end sealing surface adjacent the second end, a first inner bearing surface adjacent the first end and a second inner bearing surface adjacent the second end, and an abrasion resistant coating deposited on at least one of (a) at least one of the first end sealing surface and the second end sealing surface, and (b) at least one of the first inner bearing surface and the second inner bearing surface. The coating is selected from the group consisting of chromium nitrides, chromium carbonitrides, and mixtures thereof. The track bushing exhibits much superior abrasion, corrosion, erosion and galling resistance.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: November 14, 2000
    Assignee: Caterpillar Inc.
    Inventors: Peter W. Anderton, Phil J. Shankwitz, Chuong Q. Dam, Alan P. Dremann, William A. Holt
  • Track bushing having improved abrasion and galling resistance
    Patent number: 6045200
    Abstract: A track assembly for a track-type machine includes a track bushing that defines first and second end portions and first and second sealing end faces that are defined by the respective end portions. The track bushing also defines a bore that extends therethrough between the end portions thereof. A first bearing surface is defined on the bore adjacent the first end portion and a second bearing surface is defined on the bore adjacent the second end portion. An abrasion resistant coating is deposited on at least one of the first and second end surfaces and the first and second bearing surfaces. The coating is selected from the group consisting of chromium nitrides, chromium carbonitrides, and mixtures thereof.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: April 4, 2000
    Assignee: Caterpillar Inc.
    Inventors: Peter W. Anderton, Chuong Q. Dam, Alan P. Dremann, William A. Holt, Phil J. Shankwitz
  • Wear resistant coated steel article
    Patent number: 5549764
    Abstract: A coated wear resistant steel article has a basic carburized low silicon steel article of preselected properties including carbides isotropically exposed and having an elevation greater than material adjacent said carbides of said carburized surface and a coating material having a hardness greater than about 1200 Kg/mm covering the material adjacent said carbides of said carburized surface. In another aspect, the coating material is absent and the surface is modified by ion implantation.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: August 27, 1996
    Assignee: Caterpillar Inc.
    Inventors: Gary L. Biltgen, Kenneth W. Burris, Timothy M. Nenne, Phil J. Shankwitz, John B. Walenta