Patents Assigned to Kershaw Manufacturing Company, Ind.
  • Compaction tamper
    Patent number: 4843967
    Abstract: A combined tamper and compaction apparatus for use on a railroad track leveling machine utilizes hollow tamping tools which are inserted in loose ballast on either side of a cross tie. The tamping tools are vibrated to "fluidize" the ballast and plungers mounted within the tamping tools force the ballast therein downwardly and outwardly beneath the ties. Thereafter the tamping tools with plungers extended are raised and lowered to compact the ballast.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: July 4, 1989
    Assignee: Kershaw Manufacturing Company, Ind.
    Inventor: John B. Whitaker, Jr.