Patents by Inventor Bill R. Burford

Bill R. Burford 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).

  • Belt tightener for spiral conveyor belt
    Patent number: 4196804
    Abstract: A spiral conveyor belt is mounted between an inner cylindrical wall and a concentric outer cylindrical wall wherein the belt is formed of curved segments having an upper reach resting upon a spiralled slide plate and a lower under reach suspended therebelow, rollers at the top and at the base of the spiral about which the belt turns and means to drive the roller and belt connected thereto. The improvement is a belt tightener comprising a pair of spaced holding rollers engaging the under reach of the belt at one side thereof, a takeup roller mounted between the holding rollers at the opposite side of the belt and means to adjustably shift the takeup roller against the belt to move it between the holding rollers for taking up slack in the belt.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: April 8, 1980
    Assignee: Portec, Inc.
    Inventors: Herbert G. Hecketsweiler, Bill R. Burford