Patents by Inventor Duane Graen

Duane Graen 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: 5421431
    Abstract: The present invention is a graphite lubrication apparatus for lubricating the support rollers of a drying kiln, dryer or the like by dispensing graphite powder across the surface of the rollers. It has a graphite storage means for storing the graphite powder to be used for lubrication; a dispensing pipe adjacent the graphite storage means and having a top and bottom and a plurality of receiving holes in the top thereof the receiving holes permitting communication of the graphite from the storage means into the dispensing pipe. The dispensing pipe also having a plurality of discharge holes positioned adjacent the roller. The discharge holes permit the discharge of graphite onto the roller. A discharge means discharges graphite from the dispensing pipe onto the roller.
    Type: Grant
    Filed: August 18, 1994
    Date of Patent: June 6, 1995
    Inventor: Duane Graen