Patents by Inventor Danny J. Harpole

Danny J. Harpole 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).

  • Extendable auger conveyor
    Patent number: 7381131
    Abstract: An extendable auger conveyor including a screw thread sleeve snugly and slidably receiving a rotary drive shaft having a non-round cross section, both housed within a pair of telescoping sections of a casing having an infeed port intermediate the length of the supporting casing section.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: June 3, 2008
    Inventor: Danny J. Harpole