Patents by Inventor James M. Sheffield

James M. Sheffield 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: 7062809
    Abstract: A roofing hatchet having a magnetic striking face is hereby disclosed. A unique shouldered cap housing the magnet dampens the forces transferred from the striking by transferring the force directly to the hatchet head, bypassing the magnet, thereby preventing demagnetization typically caused by such repeated linear forces. Additional features include a cutting blade housing adapted to adjustably receive a variety of different commercially available utility knife blades, an adjustable gauge for gauging a distance from the bitted end of the hatchet, and a pulling notch for pulling fasteners from a surface. Unlike prior art hatchets, the handle of the inventive hatchet is angled, relative to the striking face, such that the force transfer from the hand of a user to a fastener being driven into a sloping surface is optimized.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: June 20, 2006
    Inventor: James M. Sheffield