Patents by Inventor David Shane Varney

David Shane Varney 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: 6598498
    Abstract: A fastener extractor is provided that includes an attachment end having an attachment means for connection to an extraction tool and a receiving end. The receiving end has an interior bore that angles inwardly towards the attachment end. The interior bore has a central axis and includes at least two arcuate grooves that extend along the interior bore towards the attachment end. The arcuate grooves curve radially and inwardly towards the central axis of the interior bore, with adjacent arcuate grooves forming sharp helically shaped ridges. A transition area is positioned between the attachment end and the receiving end and has a plurality of arcuate surfaces. Each of the plurality of surfaces corresponds to each of the arcuate grooves and projects inwardly from the corresponding groove towards the central axis. The interior bore is engageable over a fastener to be extracted.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: July 29, 2003
    Assignee: Irwin Industrial Tool Company
    Inventors: Robert B. Pigford, David Shane Varney, Mark T. Vogeler