Patents by Inventor Tim Mitchell

Tim Mitchell 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).

  • Machine and process for forming tapered or cylindrical utility poles from flat sheet metal
    Patent number: 5657922
    Abstract: A method and apparatus for producing tapered, cylindrical poles from trapezoidal metal strips. The process is comprised of the steps of curling or pre-forming a trapezoidal blank, then forming the pre-formed blank into a tubular shape by means of a shovel die. The tubular shaped blank is then welded along a longitudinal seam such that a tubular pipe is formed. The resulting tapered cylindrical poles are typically used around highways, parking lots and playing fields to support lights or signs. The process can also be used to form thin wall cylindrical pipes.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: August 19, 1997
    Inventors: Richard L. Lowery, Josh David Inda, Tim Mitchell Hoberock