Patents by Inventor Charles E. Dugan

Charles E. Dugan 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).

  • Seal manipulation tools
    Patent number: 5709018
    Abstract: Seal removal and installation tools for removing and installing seals from difficult to access locations. The seal removal tool is capable of gripping the seal without passing between the seal and the surface with which it is in sealing engagement. The seal installation tool is capable of simultaneously installing two seals on opposite ends of a shaft. The seal installation tool precisely aligns the seals and the shaft and positively locates the seal in on the shaft to minimize the chance of damaging the seal. The seal installer also gradually expands the seal to the diameter of the shaft so that stresses in the seal are substantially uniform during installation.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: January 20, 1998
    Inventor: Charles E. Dugan
  • Hinged bench grinder support
    Patent number: D647384
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: October 25, 2011
    Inventor: Charles E. Dugan