Patents by Inventor James E. Crowell

James E. Crowell 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).

  • Patent number: 5261763
    Abstract: A tamping tool comprising a shank having at its lower end a paddle of hardened steel construction, such paddle having a front face, and one or more bits of abrasion resistant material secured to the front, exposed face of the paddle and terminating at its or their lower end or ends in a ledge which underlies the lower end of the paddle. Exposed faces of the paddle and adjacent parts of the shank are covered by abrasion resistant material.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: November 16, 1993
    Inventor: James E. Crowell
  • Patent number: 4068594
    Abstract: Tamping tool for tamping railroad ballast comprising shank and detachable foot member. In one form, there is a detachable wedge inserted between the upper portion of the foot member and the shank. In another form, there is an arcuate joint between the foot member and the shank.
    Type: Grant
    Filed: February 4, 1976
    Date of Patent: January 17, 1978
    Inventor: James E. Crowell